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 <title><![CDATA[In Like a Lion]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=598</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>It is sometimes said that in the Northern Hemisphere, the month of March roars in like a lion with winter storms featuring high winds, snow, and cold temperatures.  What a prospect to contemplate!  We have a better idea, and so for our top-of-the-month column, we're bringing you a stroke problem that roars like a lion, but has the courtesy to at least do so indoors, where a warm fire and a hot drink are just the right accompaniments.  </p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:W27,23,18,17,14,13,11,7:BK32,K22,K21,9,6,5,2.</i>
</div>
	<p>When you have yourself roared through the problem, click on <i>Read More</i> to see the solution.</p>
	<p><b>Solution</b></p>
	<p>18-15 9x18 23x14 32x23 15-10 6x15 14-10 21x14 11-8 2x11 13-9 14x7 8-3 5x14 3x10x17x26x19x10---<b>A</b> 11-16 10-15 16-20 15-19 White Wins.</p>
	<p><b>A</b>---The lion roars!</p>
]]></description>
 <category>Problems</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=598</comments>
 <pubDate>Sat, 6 Mar 2010 02:02:00 -0600</pubDate>
</item><item>
 <title><![CDATA[Blither's Advice]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=586</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>There are people who talk a <i>lot</i>, and despite our illustration above, we don't at all mean to stereotype this behavior.  Copious yakking knows no boundaries of gender, group, or anything else.</p>
	<p>At times, wordiness can be most beneficial.  For instance, our monthly <i>Checker School</i> columns usually contain rather verbose advice and explanation, and we think that's a good thing, as it makes the lessons easier to learn and apply.  But this month, Ben Boland, the original source of our current pedagogical series, is untypically laconic.  Is it because the material is easier than usual?  Or was Mr. Boland having an especially quiet day?  We can't know the answer, but we <i>can</i> have a look at the subject study, which traces back to a certain L. J. Vair.</p>
	<div style="text-align: center">
<b>L. J. VAIR</b><br />
<b>WHITE</b><br />
<br />
<b>BLACK</b><br />
<b><i>Black to Play and Win</i></b></p>
	<p><i>B:W24,20,K10:B15,11,K5,3.</i>
</div>
	<p>You might say that the position speaks for itself; Black is a man up and ought to be able to win.  Yet, it's trickier than you might think at first glance.  Can you get the last word on this problem or will it leave you speechless?  We're only going to say that  clicking on <i>Read More</i> will bring you to the solution, a sample game, and explanatory notes.
</p>
	<p><b>Solution</b></p>
	<p>The solution and lettered notes are from Ben Boland's <i>Famous Positions in the Game of Checkers</i>.  Numbered notes are from computer analysis with the <i>KingsRow</i> engine, and are much more extensive than usual as there were many interesting aspects to this study.</p>
	<p>15-18, 24-19---<b>1</b>, 5-1---<b>2</b>, 19-16, 3-7, 10-3, 1-6, 16-7, 6-2. Black Wins---<b>3</b>.</p>
	<p><b>Game:</b> 11-15, 23-19, 9-14, 22-17, 6-9, 17-13, 2-6, 25-22, 8-11, 29-25, 4-8, 24-20, 15-24, 28-19, 11-15, 27-24, 14-17, 21-14, 9-18, 26-23, 18-27, 32-23, 10-14, 19-10, 6-15, 13-9 14-17, 22-13, 5-14, 25-22, 1-6, 31-26, 14-17---<b>4</b>, 30-25. 8-11, 23-19---<b>5</b>, 7-10---<b>6</b>, 25-21, 11-16---<b>7</b>, 21-7---<b>A, 8</b>, 16-30, 7-2, 30-26, 2-9, 26-17, 9-6, 17-14, 13-9---<b>B, 9</b>, 14-5, 6-10. <b>Forms above position.</b> L. J. Vair, Game No. 199, The North American Checker Board, April 1, 1899, Vol. 6.</p>
	<p><b>A</b>---I consider this move a loser. Vair.</p>
	<p><b>B</b>---To correct Mr. McCallum who leaves it here as drawn in Game No. 192, N. A. C. Board.</p>
	<p><b>1</b>---Of course 10-15 loses at once after 18-22 15-8 3-12 Black Wins.</p>
	<p><b>2</b>---White's last move set a small trap, and this seems to be the point of the study; for if Black now advances 18-22 then 19-16 costs him the man on 11 and the game is drawn.  The text move deals with this issue in an ingenious manner.</p>
	<p><b>3</b>---Whatever White does, Black gets two men and wins easily.  A very clever win.</p>
	<p><b>4</b>---Interesting here is the alternative 14-18 23-14 15-18 22-15 7-10 14-7 3-28 to a draw.  Shades of Willie Ryan!</p>
	<p><b>5</b>---If 25-21 then 6-10.</p>
	<p><b>6</b>---The alternative 17-21 also draws: 17-21 19-1 26-30 26-23 30-26 24-19 26-17 to a draw.</p>
	<p><b>7</b>---This unfortunate move actually loses for Black, and Mr. Vair didn't make note of it.  12-16 is necessary to draw: 12-16 19-12 10-14 forces White to give back the extra man, only to win it back and then lose it again!  The computer continuation is 26-23 17-26 23-19 15-18 19-15 26-31 15-8 18-23 24-19 23-27 8-4 31-26 4-8 26-22 8-11 22-18 19-15 27-31 and Black finally pulls even and gets the draw after 15-10 6-15.</p>
	<p><b>8</b>---Mr. Vair is correct.  Instead 20-11 wins for White as Black has not a single move that doesn't lose material.</p>
	<p><b>9</b>---White might try instead 6-2 here, but will still lose because of the weak man on 24, for instance : 6-2 3-8 2-6 15-18 24-19 18-23 6-2 14-10 13-9 23-27 9-5 8-11 5-1 27-31 2-6 10-14 6-2 31-27 1-6 27-24 Black wins.</p>
	<p>The above position may be found as No. 164, in the North American Checker Board, March 1, 1899. It may also be found in "Familiar Themes," Page 44, No. 27, where the Theme "Captive Cossacks," is illustrated.</p>
	<p>And now, here's the "advice" that we at <i>The Checker Maven</i> heartily recommend that you read, enjoy, and ignore.<br />
<hr /><br />
<div style="text-align: center">
<b>"BLITHER'S ADVICE"</b>
</div>
	<p>In a team match use every stratagem. Take your seat with a confident swagger. Look your man over slowly and keenly. He will think you know all that's worth knowing.   That style of bounce is better than blowing.</p>
	<p>If he moves fast, be sure you move slowly. If slowly, dash off your first 10 moves sharply—for that may rattle him the whole evening. If he protests at your old pipe smoking, beg his pardon, but smoke like a volcano.</p>
	<p>He'll soon become sick, dizzy and reckless, and hasten to get out of purgatory by losing his games to get rid of you. If he wants to call the first ending a draw, shake your head wisely; declare you can win by the "crocodile position."</p>
	<p>Ten to one he'll wonder "what that infernal thing is," get nervous, bewildered and lose the draw. If ever you are over-matched, try to make one game last the whole evening.</p>
	<p>Under-rate no man! A collier oft plays with more strategy than a prime minister.   Beware  of  the cobbler,  he  generally knows  more tricks  than a political leader.</p>
	<p>Above all try to keep your head cool, for reckless haste oft loses the game and the match.—James Hill.<br />
<hr /></p>
]]></description>
 <category>Books</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=586</comments>
 <pubDate>Sat, 27 Feb 2010 02:02:00 -0600</pubDate>
</item><item>
 <title><![CDATA[Moving Day]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=604</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>During the coming week, <i>The Checker Maven</i> is relocating full-time to Honolulu, Hawai`i.</p>
	<div style="text-align: center">

</div>
	<p>Our Santa Fe offices closed permanently on February 26, 2010.  Business will resume in our Honolulu office on March 8 at partial capacity; we expect to be back to full operation before the end of March.  </p>
	<p>We will of course publish a new column each Saturday morning during the transition, without interruption or delay.</p>
	<div style="text-align: center">

</div>
	<p>We've had a great run in Santa Fe, but it's time to move on and consolidate in the interests of reduced costs and efficiency.</p>
	<p>Catch you soon at our Honolulu office.</p>
	<div style="text-align: center">

</div>
	<p>
</p>
]]></description>
 <category>General</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=604</comments>
 <pubDate>Sat, 27 Feb 2010 02:01:00 -0600</pubDate>
</item><item>
 <title><![CDATA[Scott's Scorcher]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=592</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>The expression "hot stuff" has a number of different meanings and uses, and our photo above is a real scorcher in its own right.  Scorchers exist as well in our game of checkers, and who else is as uniquely qualified as Willie Ryan to discuss them?  Mr. Ryan, who was "hot stuff" of the checker sort in his own day, calls the following play "Scott's Scorcher" in his book <i>Tricks Traps & Shots of the Checkerboard</i>.  Let's let Willie tell us more.</p>
	<div style="text-align: center">

</div>
	<p>"We found the Dyke game and stroke, described here, hidden in an old tome, credited to W. Scott, and it is altogether too good to pass by unnoticed. In this example, the winning clearance is effected by employing one of those peculiar in-and-out devices so widely used in stroke strategy. </p>
	<table>
<colgroup span="3" width="30%"></colgroup><br />
<tr><td>11-15 </td><td>  27-23</td><td>9-14 </td></tr>
<tr><td>22-17	</td><td>4- 8 </td><td>23-19</td></tr>
<tr><td>15-19	</td><td>23-16 </td><td>11-15</td></tr>
<tr><td>24-15	</td><td>11-20 </td><td>19-16---<b>3</b></td></tr>
<tr><td>10-19</td><td>	29-25 </td><td>15-19---<b>4</b></td></tr>
<tr><td>23-16</td><td>	7-10</td><td> 31-27---<b>A</b></td></tr>
<tr><td>12-19</td><td>	17-13 </td><td>3-8</td></tr>
<tr><td>25-22	</td><td>8-11 </td><td>16-12---<b>B</b></td></tr>
<tr><td>8-11	</td><td>26-23 </td><td>See the</td></tr>
<tr><td>   </td><td></td><td>           diagram.</td></tr>
</table>
	<div style="text-align: center">
<b>WHITE</b><br />
<br />
<b>BLACK</b><br />
<b><i>Black to Play and Win</i></b></p>
	<p><i>B:W32,30,28,27,25,22,21,13,12:B20,19,14,10,8,6,5,2,1.</i>
</div>
	<p><b>A</b>---White dares not play 16-11, as black will force white into this crushing coup: 16-11, 10-15, 31-27---<b>5</b>, 14-17*!, 21-14, 19-23, 27-18, 6-9, 13-6, 1-26, 30-23, 15-29. A very unusual 'double-take.'</p>
	<p><b>B</b>---The beginning of the end. However, white still can pull out with a draw, by: 30-26*---<b>6</b>, 10-15, 13-9*, 6-13, 16-12, 8-11, 27-24, 20-27, 32-7, 2-11, 26-23, 11-16, 28-24, 16-20, 23-19, 20-27, 19-10, 27-31, 10-7, 31-26, 7-2, 26-17, 2-7, 1-6, 12-8, 5-9, 7-11, 17-22, 25-18, 14-23, 11-15, 23-26, 8-3, 26-30, 3-7, 9-14, 7-2, 6-9, 2-6, 30-26, 15-10. <i>Wm. F. Ryan</i>."</p>
	<p><b>3</b>---This move may actually lose.  32-27 is much to be preferred here---<i>Ed.</i></p>
	<p><b>4</b>---Gives back the edge; 20-24 would have retained the substantial advantage for Black---<i>Ed.</i></p>
	<p><b>5</b>---White would do better here with 22-17, although the game may still be lost---<i>Ed.</i></p>
	<p><b>6</b>---In a line of play that probably only a computer would find, <i>KingsRow</i> shows that the surprising move 13-9 will also draw here as White pulls off a stroke of his own: 13-9 6x13 16-12 8-11 27-24 20x27 32x7 2x11 etc.   Drawn---<i>Ed.</i></p>
	<p>Are you "hot stuff" yourself?  (Remember, we're talking checkers here.)  Demonstrate your elevated temperature by solving the problem; but if you get overheated, clicking on <i>Read More</i> will take you straight to the solution.</p>
	<p><b>Solution</b></p>
	<p>"<i>Continue:</i> 2-7*---<b>1</b>, 12-3, 14-18, 22-15, 19-23, 27-18, 10-19, 3-10, 6-29, and black wins---<b>2</b>."</p>
	<p><b>1</b>---Although Willie "stars" this move, 14-18 wins as well, transposing back to the main solution: 14-18 22-15 2-7 12-3 19-23 27-18 10-19 3-10 6-29 and Black Wins as above---<i>Ed.</i></p>
	<p><b>2</b>---For instance 21-17 19-23 17-14 1-6 and White has no move that does not lose a man---<i>Ed.</i></p>
]]></description>
 <category>Books</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=592</comments>
 <pubDate>Sat, 20 Feb 2010 02:02:00 -0600</pubDate>
</item><item>
 <title><![CDATA[V for Victory]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=605</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>History will forever remember Sir Winston Churchill as the man who lead England to victory in the dark days of World War II.  Sir Winston was a writer, painter, statesman, and politician; but above all, he was a leader who inspired and encouraged his people to endure, survive, and ultimately triumph.  The <i>Checker Maven</i> has long admired the steadfast courage of the British people, and Sir Winston was its mainstay and embodiment.</p>
	<p>We were reminded of Sir Winston when we saw the tutorial problem below; Black is to play and win, and Sir Winston's famous "V for Victory" seems to appear when the board is viewed from the White side, as shown below.</p>
	<div style="text-align: center">

</div>
	<p>However, for the purpose of our study, since the terms specify Black to play, let's look at this the other way round.</p>
	<div style="text-align: center">
<b>WHITE</b><br />
<br />
<b>BLACK</b><br />
<b><i>Black to Play, What Result?</i></b></p>
	<p><i>B:W25,24,20,17,16:B10,7,6,3,1.</i>
</div>
	<p>The terms given are not "Black to Play and Win" but since we are talking about "V for Victory" and Black has a nice V formation, you might make an assumption here.  (Of course, you know what they say about assumptions.)</p>
	<p>In any case, keep your courage, stay the course, find the way to potential victory, and then click on <i>Read More</i> to see the solution.</p>
	<p><b>Solution</b></p>
	<p>Indeed, victory is at hand for Black, and there are a couple of ways to go about it.  Following are the two main lines.  The first line leads to an especially elegant finish.  The position is eminently practical and shows the often hidden resources that exist on the checkerboard.</p>
	<p>10-14 17x10 7x14 25-22 6-9 24-19 9-13 16-11 14-17 22-18 17-22 18-14 22-26 14-10 26-31 11-7 31-26 7-2 26-22 19-16 13-17 2-6 17-21 16-12 21-25 6-2 22-17 2-6 25-30 6-2 30-26 2-7 17-13 7-2 13-9 20-16 26-23 16-11 23-19 11-8 19-16 8-4 16-11 Black Wins.</p>
	<p>White is trapped and completely out of safe moves.</p>
	<p>10-15 16-12 7-10 20-16 15-18 25-21 18-22 16-11 22-25 11-8 25-30 8-4 30-26 4-8 26-22 17-13 10-15 24-20 15-19 8-11 19-23 21-17 22-18 11-8 23-26 20-16 26-30 8-11 30-25 11-8 25-21 Black Wins.</p>
	<p>Black wins the hapless White man on 17.</p>
]]></description>
 <category>Problems</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=605</comments>
 <pubDate>Sat, 13 Feb 2010 02:02:00 -0600</pubDate>
</item><item>
 <title><![CDATA[The Fastest Month]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=597</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>February, of course, is the shortest month of the year, weighing in at just 28 or 29 days; and those days seem to rush by, especially if you've got bills that come due the first of every month.  No sooner have you paid February's bills, it feels like the ones for March are coming due.</p>
	<p>For the short and fast month of February, we propose a short and fast checker problem--- and we won't even bill you for it!  Time on our Javascript clock rushes by as fast as can be.  Can you solve this one in ten seconds?  We consider it moderately easy.  Click below to show the problem and start the clock; then click on <i>Read More</i> to confirm your solution.</p>
	<p><a href="http://www.bobnewell.net/checkers/speed/sp0210.html">February Speed Problem</a> (moderately easy)</p>
	<p>
</p>
	<p><b>Solution</b></p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:W15,28,29,32:B8,12,16,20.</i>
</div>
	<p>32-27 16-19 29-25 12-16 15-11! 8x15 25-22 15-18 22x15 19-23 27x18 White Wins.</p>
]]></description>
 <category>Problems</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=597</comments>
 <pubDate>Sat, 6 Feb 2010 02:02:00 -0600</pubDate>
</item><item>
 <title><![CDATA[Checkersland]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=603</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>The amusement park in Cedar Point, Ohio, isn't known as <i>Checkersland</i>, though it could well have been so named, instead of bearing the much less orignal title of <i>Cedar Point Amusement Park</i>.  We're certain that it's a fine amusement park, though we doubt that it honors the history of Cedar Point as the home of a series of high-level championship checker tournaments some decades back.  More's the pity; we could envision some sort of checker-themed roller coaster as a major attraction.</p>
	<p>However, there really is a <i>Checkersland</i>; but it's a relatively new checker-playing computer program.  In recent years we've come across very few new checker playing programs that were intended to be more than toys, but <i>Checkersland</i> certainly is a serious effort.  It plays a very wide variety of checker games, running the gamut from American-British "straight" checkers, to Russian, to pool, and even Turkish and Sri Lankan and many more.  The graphics are attractive and there are a number of useful features, such as reading PDN, position set-up, and the like.  Best of all: <i>Checkersland</i> is coded in Java and so will run on Windows, Linux, Mac, and in fact on just about any computer that boasts a conformant Java implementation.  The <i>Checkersland</i> web site can be found <a href="http://checkersland.com/">here</a>.</p>
	<div style="text-align: center">
<br />
<b>Screenshot from <i>Checkersland</i></b>
</div>
	<p>We were more than anxious to try out this latest checker-playing effort, and pleased to see that it featured many levels of play, from "easy" right through "impossible."  So we carried out our standard test, playing <i>Checkersland</i> at its highest level, "impossible," against Martin Fierz's <i>Simple Checkers</i>  We gave <i>Simple Checkers</i> five seconds per move to match up with the time that <i>Checkersland</i> seemed to take on our laboratory test system, <i>Konanekane</i>, a dual-core 2.5 Ghz machine with 4GB of memory.</p>
	<div style="text-align: center">

</div>
	<p>To make a long story short, our testing showed that <i>Checkersland</i> is a work in progress, at least with respect to "straight" checkers; even at its "impossible" level, it was handily defeated by <i>Simple Checkers</i>.</p>
	<p>You can see the full game in animated form, with brief comments, by clicking <a href="http://www.bobnewell.net/checkers/anims/cland.html">here</a>.  But first, we'd like to show you a position from the game.  <i>Checkersland</i> has just made a weak move, and now <i>Simple Checkers</i>, playing Black, can play a winning line.</p>
	<div style="text-align: center">
<b>WHITE</b><br />
<br />
<b>BLACK</b><br />
<b>Black to Play and Win</b></p>
	<p><b><i>B:W32,29,26,25,21,20,18:B12,11,10,9,5,3,1.</i></b>
</div>
	<p>Our challenge to you is to find the win for Black.  It's certainly not at the "impossible" level, but it does require a bit of thought and follow-through.  After you've done the possible, or found it not possible, click on <i>Read More</i> to see one possible winning line, or else go back and view the <a href="http://www.bobnewell.net/checkers/anims/cland.html">animation</a> to see the solution in the context of the entire game.</p>
	<p>We hope that the Russian author of <i>Checkersland</i> continues to work on his product, as we believe it has a lot of unrealized potential.  And, by the way, Cedar Point Amusement Park take note: we'd still like some day to ride on a checker-themed roller coaster.</p>
	<p><b>Solution</b></p>
	<p>There are numerous variants, but here is the computer-calculated winning line:</p>
	<p>12-16 26-23 10-15 25-22 3-7 29-25 15-19 32-27 19-26 27-24 26-31 etc. to a Black win.</p>
	<div style="text-align: center">

</div></p>
]]></description>
 <category>Programs</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=603</comments>
 <pubDate>Sat, 30 Jan 2010 02:02:00 -0600</pubDate>
</item><item>
 <title><![CDATA[McCullough's Draw]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=585</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>The McCullough Memorial Bridge spans Coos Bay in Oregon, and not surprisingly was called the Coos Bay Bridge when it was completed in 1936.  No, it's not a <i>draw</i> bridge; it's what's known as a <i>cantilever</i> bridge.  It was renamed some years later, not after checkerist R. McCullough, but instead in honor of the designer, Conde McCullough.  We were unable to determine if the latter Mr. Mccullough was a checker player, but we can surely speculate that he might have been.</p>
	<p>Today, in our <i>Checker School</i> lesson, we hark back to the days of checkerist McCullough, who is credited with a very practical checker draw (which has little if anything to do with a cantilever).  The subject position is shown below.</p>
	<div style="text-align: center">
<b>McCULLOCH'S DRAW</b><br />
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Draw</i></b></p>
	<p><i>W:W20,K14,K10:BK26,K19,12,5.</i>
</div>
	<p>It's another of those situations that the average checker player might write off as a loss, but in which the expert would see drawing possibilities.  Can you leverage your skills and find a draw for White?  When you've spanned the gap, cross over to the solution by clicking on <i>Read More</i>.</p>
	<p><b>Solution</b></p>
	<p>The solution, sample games, and lettered notes come from Ben Boland's wonderful book, <i>Famous Positions in the Game of Checkers</i>.  Numbered notes are from computer analysis by Ed Gilbert's <i>KingsRow</i> engine with his 10-piece endgame database.</p>
	<p>14-17---<b>1,2</b>, 26-23, 17-14, 19-24, 10-15, 23-19, 15-10, 24-27, 14-17, 27-23, 17-14. Drawn.</p>
	<p><b>Game:</b> 11-15, 21-17 13-22, 26-17, 15-18 6-10, 24-19, 11-15, 6-9, 15-6, 9-27, 22-9-13,   25-21,   8-11,   17-14,   10-17, 24-20, 2-6, 29-25, 18-22, 25-18, 10-15 23-18, 15-24, 28-19, 3-8, 18-15, 1-6, 27-23, 22-26, 31-22, 6-9, 15-6, 9-27, 22-18---<b>A</b>, 27-31, 6-1, 31-27, 19-15, 27-23, 18-14, 23-18, 15-10, 18-9, 10-3, 9-13, 3-7---<b>B</b>, 13-22, 7-10, 22-18, 1-6, 18-23, 30-25, 8-11, 25-22, 23-19, 6-2, 19-23, 2-6, 23-26, 22-17, 26-23, 17-13, 23-19, 10-14, 19-15, 14-10, 11-16, 10-19, 16-23, 6-10, 4-8, 10-14, 8-11, 13-9, 11-15, 9-6, 23-26, 6-2, 26-30, 2-6, 15-19, 6-10 19-23, 14-17, 23-26, 17-14, 30-25, 14-17, 26-30, 17-14, 25-22, 10-6, 30-25, 6-10, 22-26, 14-17, 26-23, 17-14, 23-19, 14-17, 25-30, 17-14, 30-26.  <b>Forms above position.</b> A. J. Heffner, Oct. 1924, Morris-Systems Checkerist also Master Play, Part 5.</p>
	<p><b>Game:</b> 11-15, 23-19, 8-11, 22-17, 4-8, 17-13, 15-18, 24-20, 11-15, 28-24, 8-11, 25-22, 18-25, 29-22, 9-14, 27-23, 6-9, 13-6, 2-9,- 22-17, 1-6---<b>C</b>, 31-27, 9-13, 26-22 14-18, 23-14, 3-8---<b>D</b>, 32-28, 6-9, 22-18, 15-22, 19-16, 9-18, 17-14, 10-17, 21-14 12-19, 24-15, 5-9, 14-5, 22-25, 30-21, 18-22, 5-1, 11-8, 1-6, 22-26, 20-16, 8-11 16-12 11-15, 12-8, 7-11, 27-24, 11-16, 6-10, 16-19, 10-14, 18-23, 8-3, 23-27, 3-8, 19-23, 14-10, 27-32, 10-19, 26-30, 19-26, 30-23, 8-12, 23-18, now 12-16 wins, <b>and</b> 24-19 allows <b>McCulloch's Draw.</b> E. Laidlaw, Game No. 358, Wood's Checker Player, March 1940.</p>
	<p><b>A</b>---In the A. Long vs. J. Horr Match Book, Game 17, Long played 19-15 to a draw. A note followed; the only move to draw. Hefiner reviewing the game in the "Checkerist" said there are at least two ways and a probable third to draw, the one taken by Long is of course the best; 19-15, 22-18 and 30-25.</p>
	<p><b>B</b>---Wyllie here gives 17-14, 13-9, 14-10, Black Wins. I suspect that the last move, 14-10 is the loser.  3-7 instead looks like a probable draw---<b>3</b>. Heffner.</p>
	<p><b>C</b>---15-18 is the standard draw as shown by Sinclair.</p>
	<p><b>D</b>---6-9*, 22-18, 15-22, 32-28, 9-18, 19-16. Drawn.</p>
	<p><b>1</b>---14-18 also works here, though it allows White to get in a push of the man on 5.  However Black still draws due to tactical considerations: 14-18 5-9 18-15 19-24 (19-23 comes to the same result) 14-10 9-18 15-31. Drawn---<i>Ed.</i></p>
	<p><b>2</b>---Lesser players such as ourselves might ask how we can recognize a draw in such a hopeless-looking position, and how we might find a move such as 14-17 to draw.  Consider the features of the position.  Black's man on 12 is held by White's man on 16, so to win Black will need to push through the man on 5.  White's defensive advantage is the central placement of his kings, enabling him to keep Black's kings at a distance.  Then, it all comes down to the question: can White hold back Black's kings <i>and</i> restrain the man on 5?  The answer is yes, and the point of 14-17 is that if now Black pushes 5-9 the man is lost at once to 17-13---<i>Ed.</i></p>
	<p><b>3</b>---Computer analysis contradicts Heffner, showing that 17-14 loses straightaway, and that a later 3-7 instead of 14-10 cannot save the game; for instance 17-14 13-9 3-7 9x18 7-10 18-23 1-6 23-27 30-25 27-23 25-22 23-26 22-17 26-22 17-13 22-17 6-2 8-11 2-6 5-9 6-2 9-14 etc. Black Wins.</p>
	<p>McCulloch's Draw was first published in the "Glasgow Weekly Herald," on Tan 29  1881, as Position No. 733, then later as No. 671 in Gould's Problem Book- <b>Black</b>---5, 12, Kings 15, 26, and <b>White</b>---20, Kings 10, 19, 21. White Plays, 10-6   15-24   21-17, 24-19, 6-10, same as above after first move.   A note was given in the Herald; ending of a game played at Glasgow between Messrs.<br />
R. McCulloch and D. Gourlay.</p>
]]></description>
 <category>Books</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=585</comments>
 <pubDate>Sat, 23 Jan 2010 02:02:00 -0600</pubDate>
</item><item>
 <title><![CDATA[Ryan's Bell Ringer]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=591</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>The words "bell ringer" may evoke all sorts of images, from the classic sculpture above, to the chiming of the Liberty Bell, to the exquisite sound of handbells in a church choir.  In its simplest form, though, a "bell ringer" is some sort of spectacular or noteworthy positive happening.  Bell ringers abound on the checkerboard, and surely one of the most knowledgeable on this topic had to have been Willie Ryan.  Today, in an excerpt from his book <i>Tricks Traps & Shots of the Checkerboard</i>, Willie shows and tells about a "bell ringer" that is definitely worth our time.  Willie tells us about it below, modestly referring to his study as "better than average"!</p>
	<div style="text-align: center">

</div>
	<p>"Among my collection of checker papers, I came across the better than average example on the Ayrshire Lassie, played out on the next page, which is good enough to inveigle even champion players, as the trap occurs on a line of play favored by the heavyweights.</p>
	<table>
<colgroup span="3" width="30%"></colgroup><br />
<tr><td>11-15 </td><td>            5-9   </td><td>        14-18---<b>A, 3</b></td></tr>
<tr><td>24-20        </td><td>   17-13       </td><td>   32-27</td></tr>
<tr><td>8-11       </td><td>    11-16     </td><td>       9-14---<b>B</b></td></tr>
<tr><td>28-24        </td><td>   20-11 </td><td>         26-22</td></tr>
<tr><td>3-8     </td><td>    7-23           </td><td> 4-8---<b>C</b></td></tr>
<tr><td>23-19       </td><td>    27-11</td><td>           31-26</td></tr>
<tr><td>9-14         </td><td>    8-15    </td><td>      15-19---<b>D</b></td></tr>
<tr><td>22-17       </td><td>    24-20   </td><td>          forming</td></tr>
<tr><td>                              </td><td></td><td>        the diagram</td></tr>
</table>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:W13,20,21,22,25,26,27,29,30:B1,2,6,8,10,12,14,18,19.</i>
</div>
	<p><b>A</b>---A weak move. The following play will earn a draw easily: 4-8, 25-22, 15-18, 22-15, 10-19, 29-25, 1-5, 25-22, 14-17, 21-14, 9-25, 30-21, 8-11, 26-22. <i>Wm. F. Ryan.</i></p>
	<p><b>B</b>---Forced, as 10-14 loses to 26-23, while 1-5 goes down to 20-16, 12-19, 26-23, 19-26, 30-7, 2-11, 21-17, etc., with white winning. <i>Wm. F. Ryan.</i></p>
	<p><b>C</b>---All that's left. 2-7 allows white to clean up with: 13-9, 6-13, 22-17,13-22, 27-23,18-27, 25-2. Again at C, if 1-5 is played, white rings the bell with this bright play: 1-5, 31-26, 2-7, 26-23, 4-8, 13-9, 6-13, 22-17, 13-22, 21-17, 14-21, 23-14, 10-17, 25-2, 8-11, 29-25, 11-15, 27-23, 5-9, 2-6, 9-14, 6-10, 15-18, 10-15*, 18-27, 20-16, 12-19, 15-31, 14-18, 31-26. <i>Wm. F. Ryan.</i></p>
	<p><b>D</b>---A promising move that collapses. Black's only line of play for a draw is 2-7*---<b>4</b>, 26-23, 15-19*, 23-16, 12-19, 22-15, 7-11*, 30-26, 11-18, 20-16, 8-12, 16-11, 12-16. <i>Wm. F. Ryan.</i>"</p>
	<p><b>3</b>---The computer however thinks this move is a likely draw, although computers don't distinguish the between the practical reality of an easy draw vs. a hard draw---<i>Ed.</i></p>
	<p><b>4</b>---The computer prefers an alternative drawing line in which Black goes a man down for a little while: 8-11 27-24 18-23 26x19 14-18 22-17 18-23 17-14  10x17 21x14  23-27 19x10 6x15 25-22 27-32 14-10 32-28 10-7 28x19 7-3 19-23 3-8 etc. to a draw.  This is a line of play that a human player would be most unlikely to select in the presence of a more straightforward option---<i>Ed.</i></p>
	<p>Can you ring the bell and solve the problem, or will you just hang around ringing the chimes?  Let your mouse sound the <i>Read More</i> note to see Willie's solution.</p>
	<p><b>Solution</b></p>
	<p>"<i>Continue:</i> 22-15, 19-24---<b>1</b>, 26-22*---<b>2</b>, 24-31, 22-17, 10-19, 17-10, 6-15, 30-26, 31-22, 25-4, and white wins. <i>Wm. F. Ryan.</i>"</p>
	<p><b>1</b>---1-5 has better chances here but still loses, for instance 1-5 26-22 14-18 20-16 19-23 16-11 10x19 11x4 23x32 22x15 and White, being a clear man up, will win---<i>Ed.</i> </p>
	<p><b>2</b>---Actually 25-22 will win here also in a very similar manner: 25-22 10x19 30-25 24x31 22-17 31x22 17x10 6x15 25x4 White Wins---<i>Ed.</i></p>
]]></description>
 <category>Books</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=591</comments>
 <pubDate>Sat, 16 Jan 2010 02:02:00 -0600</pubDate>
</item><item>
 <title><![CDATA[The Varsity Team]]></title>
 <link>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=588</link>
<description><![CDATA[	<div style="text-align: center">

</div>
	<p>Tommy was, as usual for a Saturday morning, visiting with Uncle Ben on Uncle Ben's porch.  Southern Florida winters are mild, and there were few Saturdays that Tommy and Uncle Ben didn't meet on the porch for Tommy's weekly checker lesson, and a glass or two of Uncle Ben's world famous lemonade--- or at least, Tommy thought it was good enough to be world famous.</p>
	<p>Tommy was in great spirits and had just shared some fantastic news with Uncle Ben: a place had opened on the varsity checker team, and Coach Hovmiller had chosen Tommy to fill the position!</p>
	<div style="text-align: center">

</div>
	<p>"Well, Tommy," Uncle Ben said, "you've worked long and hard for this.  I know you were disappointed last year when you didn't quite make varsity, but you did very well as captain of the junior varsity, and I'm sure your coach felt you were ready for the 'big time.'  Congratulations, young man!"</p>
	<p>Tommy was all smiles--- who would not be?  "Thank you, sir,"  he replied.</p>
	<p>"Of course, Tommy, now you'll face some very tough competition.  Middle-school varsity checkers in Florida is no piece of cake, no indeed.  There are some very strong teams and some very good players, and you'll have to be at the top of your game.  Now, you're already a fine player, but you will surely meet up with other boys and girls who are top notch as well.  So, each week, we're going to work on problems and positions that are a little harder each time.  How do you feel about that?"  Of course, Uncle Ben always gave Tommy a little wink when he asked him difficult questions.</p>
	<p>"I'm so pleased to have you helping me," Tommy said.  "Not everyone is so fortunate as to get private lessons from a famous checker author!  So, whatever you say, Uncle Ben, and I'll do my best!"  (Ben, naturally, wasn't really Tommy's uncle, but all the young checkerists called him that, just out of courtesy and respect.)</p>
	<p>"Then shall we begin?"  asked Uncle Ben.  "I have a very practical situation set up on the board here ... and of course, there's some lemonade as an aid to thinking!"  So saying, he poured out two glasses and handed one to Tommy.</p>
	<div style="text-align: center">

</div>
	<p>"Thank you Uncle Ben," Tommy said, but his voice drifted as he started to concentrate on the following position.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:WK14,K19,21:B12,13,K22.</i> 
</div>
	<p>Several minutes passed and Tommy had gotten through most of his glass of lemonade before he finally said, "Wow, Uncle Ben, that's a tricky one!  But here's how I think White can win it ..."</p>
	<p>Can you keep up with the newest member of the varsity team?  When you've worked out the solution, click on <i>Read More</i> for the solution, a sample game, and numerous additional examples of the winning theme.</p>
	<p><b>Solution</b></p>
	<p>Today's solution is No. 1 below.</p>
	<p><b>Game</b>---11-15, 22-17, 15-19, 23-16, 12-19, 24-15, 10-19, 25-22, 9-13, 17-14, 8-11, 22-18, 3-8, 27-23, 8-12, 23-16, 12-19, 32-27, 6-9, 27-24, 11-15,  18-11,  7-16,  24-15,   9-18,   15-11,  1-6, 29-25,   6-10,   31-27. 10-15,  26-23,   18-22, 25-18, 15-22, 30-26, 22-31,  23-18,  31-24,  28-12,  5-9, 12-8,  2-6,   8-3,   6-10,   3-7, 10-15,   18-14, 9-18, 7-10,  18-22,   10-19, 22-26, 11-7,   4-8---<b>A</b>,   7-3,   8-12,   3-7,   26-30,   7-10,   30-26,   10-14, 26-22---<b>Forms   No.   1.</b>    <b>A</b>---J.   Cowden  shows  a   draw at this  point to  avoid the theme:   26-30, 7-3, 30-26, 3-7, 26-22,  19-15,  4-8,   7-10,  8-12, 10-14,  12-16,  14-18, 22-25, 18-23, 25-22, 23-27,   16-20, 27-32, 22-26,  15-18, 20-24.  Drawn.     J.  Davis,  No.  107, H.  P.  Bk. has like idea.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:WK14,K19,21:B12,13,K22.</i> 
</div>
	<p>1.     R. Raw, No. 78, The Drs. Brd., 1870; No. 107, L. P. Bk. 21-17. 22-25---<b>A</b>, 19-23, 13-22, 14-17. W.  W.   <b>A</b>---12-16, 19-12, 22-25, 12-16, 13-22, 16-19. W. W.</p>
	<div style="text-align: center">
<b>WHITE</b><br />
<br />
<b>BLACK</b><br />
<b><i>Black to Play and Win</i></b></p>
	<p><i>B:B12,K18,K19:W20,25,K11.</i>
</div>
	<p>2.    J. D. Janvier, No. 267 Leed's Mercury, Feb.   17,  1883. Black to win. 18-14. 25-21, 12-16. No. 931 G.  P.   Bk.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:B13,K4,K25:W21,K14,K23</i>.
</div>
	<p>3.    J. Wylie, Prob. 551, Draughts World. White to win.  21-17,   13-22,   14-17,  25-21*, 17-26.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:B9,K12,K25:W22,K18,K23.</i>
</div>
	<p>4.     J. A. Larson, No. 79, A. C. R- Vol. 3, 1891. White to win. 22-17, 9-13, 18-14, 13-22, 14-17. No. 14,  World's Prob.  Bk.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:B21,25,K4:W20,K15,K17.</i>
</div>
	<p>5.     F. Dalumi, No. 11, Wood's Study 3 (Vancouver Province). White to win. 17-22, 25-29, 20-16, 4-8, 16-11, 8-12, 22-26, 21-25, 11-8,  12-3, 26-30, 3-7, 30-21.</p>
	<div style="text-align: center">
<b>WHITE</b><br />
<br />
<b>BLACK</b><br />
<b><i>Black to Play and Win</i></b></p>
	<p><i>B:BK3,K9,K27:W10,K12,K30.</i>
</div>
	<p>6.    Chas. J. Renner, No. 16, "It's Your Move." Black to win. 27-23, 12-16, 3-8, 30-25, 23-18, 25-21, 8-11, 16-7, 18-15.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:B12,18,K9:W29,K19,K20.</i>
</div>
	<p>7.    C. J. Greensword, No. 1207, D. R. Vol. 6. White to win. 29-25---<b>A</b>, 9-13, 20-24, 13-17, 19-15, 18-23, 25-22, 17-26, 15-18, 26-30. 18-27, 30-25, 24-19. W. W.   <b>A</b>---20-24,  here  only draws.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:B21,K4,K29:W20,K15,K22.</i>
</div>
	<p>8.     B. Greenfield, Prob. 117, New Checker-gram. White to win.  Same as No. 5 at 2nd move.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:B9,K11,K29:W21,K8,K15,K27.</i>
</div>
	<p>9.     A. Hipkins, Prob. 5374, R. C. White to win. 15-18, 11-4, 27-23, 29-25. 21-17. 9-13, 18-14, 13-22, 14-17.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play and Win</i></b></p>
	<p><i>W:B11,K12,K13,K17:W14,22,K2,K19,K27.</i>
</div>
	<p>10.    A. Hipkins, No. 5202 R. C. 11-28-35. White to win. 14-9. 17-26, 27-24. 13-6, ?2-9?, 11-16---<b>A</b>, 9-14, 16-23, 14-18.  <b>A</b>---26-22, 9-14, 11-16, 14-18. 16-23---<b>B</b>, 18-25. W. W.   <b>B</b>---22-15, 19-10, 12-8, 10-15,   16-20,  24-19,   8-12,   15-11.   W. W.</p>
	<div style="text-align: center">
<b>BLACK</b><br />
<br />
<b>WHITE</b><br />
<b><i>White to Play, Black to Win</i></b></p>
	<p><i>W:B12,22,K28:W20,30,31.</i>
</div>
	<p>11.    F. W. Drinkwater, No. 214 L. P. Bk.  W. plays, B. W.  Arises from Single Corner, Var. 22, above work. Pos. given as a draw. In G. P. Bk. No. 124 Janvier gives it as a win (as No. 1) in appendix Belden avoids idea (as by Raw).  But A. J. Richardson, N. A. C. B., Vol. 8. No. 4. page 54 shows the win.  Also see A. C. R.. Vol. 2. No. 156. And Game No. 2222 D.   W., Sept.  1908,   Vol. 32.</p>
	<p><i><b>AVOIDING  IDEA</b></i></p>
	<div style="text-align: center">
<b>WHITE</b><br />
<br />
<b>BLACK</b><br />
<b><i>Black to Play, White to Draw</i></b></p>
	<p><i>B:B12,23,K14:W15,20,21.</i>
</div>
	<p>R. Raw, No. 21 "The Drs. Board," 1869. B. plays. W. D. 23-26. 15-11. 26-31. 11-8, 31-26, 8-3, 26-23, *3-8, 23-18, 8-11, 14-9, 11-8, 18-15, *21-17, 9-6, 17-13, 15-10, 8-3, 8-1, 3-8, 10-15, *8-3, 15-11.  Drawn.</p>
	<p><i>Uncle Ben's Porch</i> is a purely fictional representation of the retirement days of legendary checker writer Ben Boland.  Material for the column is taken from Mr. Boland's classic work, <i>Familiar Themes in the Scientific Game of Checkers</i>.  This is a very ambitious project and typesetting errors are bound to occur.  Please help by sending us your corrections.  You can email <a href="mailto:unclebensporch@checkermaven.com">unclebensporch@checkermaven.com</a>.  Thank you!</p>
]]></description>
 <category>Books</category>
<comments>http://www.bobnewell.net/nucleus/checkers.phpindex.php?itemid=588</comments>
 <pubDate>Sat, 9 Jan 2010 02:02:00 -0600</pubDate>
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