How good are you at geometry? Does the problem above look easy to you? To us, it looked easy in principle, and we didn't need more than a minute or two to come up with a set of equations to represent the relationships in the diagram. Then we went to solve the equations for the desired variable 'x'. That too was just the work of a couple of minutes ... until we ran into what we'll call "a little snag."
Hopefully today's checker problem will be the work of a few seconds (not even minutes), just a brief summer interlude, with no hidden snag. Let's have a look.
You've probably already solved it, but we'll extend an extra incentive to click on Read More: We'll also give the answer to the math problem.[Read More]
It's not often that The Checker Maven presents a political message or takes a political stand, but as we prepare to celebrate the birthday of our great nation on our wonderful 4th of July holiday, we can't help but wish for unity among us.
In our Republic, Americans are free to differ and indeed we celebrate our differences. But the kind of divisiveness we've seen over the past year or so is good for no one. Why can't we agree to disagree about some things, but still unite for the sake of our nation?
The 4th of July is an appropriate time to reflect on the fact that we are one nation and one people, e pluribus unum, from the many--- one. Let's work together for the good of us all.
And for our checker problem today, we've simply got to turn to Tom Wiswell, that great problemist and great American patriot.
Can checkers be a great unifying factor? Why not? Try out this problem and then click on Read More to see how to do it. The solution is one worthy of a master; maybe you might enjoy getting together with your checker friends--- regardless of anyone's political views--- to work it out.[Read More]
From one corner to the other, boxers chase their opponents, hoping to land the winning blow. The fighter above seems ready to come out of her corner and do whatever it takes to lay out her opponent.
But some fighters win by decision rather than the quick knockout. That fact, and the title of today's column, provide broad hints toward the solution of the problem shown below.
Before you begin, let's make note of a couple of things. First, White has two kings more or less entrapped in or near the Black double corner. Second, White has a man on 12 that is immobilized. Finally, White holds a bridge position on 29 and 31, but the man on 29 is immobile, and if White moves the man on 31, Black can stop it with 15-19 and then win it a few moves later.
So what can White do? Not much except perhaps shuffle around in the double corner. Black has a tremendous mobility advantage. That usually spells a win. The question is how to make it happen.
We'll repeat our hints. This is not a quick knockout; to win, Black must patiently apply technique. And again, keep in mind the title of our study. It's by no means an easy fight. This one is championship class.
Don't let this one knock you out; win the decision, then land your mouse on Read More to check your solution.[Read More]
One of Great Britain's most famous landmarks, London Bridge, has changed a lot over the years. The sketch above depicts London Bridge as it supposedly looked near the end of the 17th century. It's a far cry from today's London Bridge, and we suspect that's just as well.
One thing that hasn't changed over the years, though, is the Bridge Position in our game of checkers. Certainly, more variations and interesting problems have been published, but at heart a bridge has the same fundamental characteristics as ever.
Of course, sometimes a bridge is a win, sometimes a loss, and oft-times a draw. It all depends. In the following position, a rather unornamented bridge turns out to be a loss for the bridging side.
Is this a bridge that you can cross, by finding the Black win? We'd rate the difficulty as medium; if you're familiar with bridges, you won't have any trouble with it; and if you're not familiar with these positions, this is a good time to bridge that gap. When you're ready, click on Read More to see the solution.[Read More]
We didn't think they could do it, but our intrepid Research Department managed to come up with another meaning for the word stroke, to wit: at a stroke, with the meaning of "all at once," such as, "we solved a dozen checker problems at a stroke."
That would be quite a feat, indeed, and of course you just know we're going to present a stroke problem to kick off the month of June.
Can you solve this one "at a stroke" or will it take you longer? Are your powers of visualization up to the challenge? If you find the position difficult, we refer you to the quote at the beginning of the article.
When you've determined the correct moves, clicking on Read More will bring you to the solution--- at a stroke.[Read More]
Spring is coming around in the Northern Hemisphere and perhaps, if you've had a long winter, you're thinking about re-engaging in the outdoor life. There's much to do in the great outdoors and every reason to take full advantage.
While today there's a commercial magazine called Outdoor Life, almost a hundred years ago there was another called The Journal of the Outdoor Life, published by the National Tuberculosis Association. We found it to be quite an interesting general readership journal, promoting the idea that fresh air is good for tuberculosis patients. Of course, medicine has advanced enormously in the last hundred years and some of the ideas in the Journal definitely seem quaint.
Interestingly, the Journal also had a "Games and Indoor Sports" section which contained some excellent checker material. Featuring checkers was fairly common back in that day, but alas, that is no longer the case.
In 1920 The Journal of the Outdoor Life published the following doozy.
Unless you have a sharp pictorial memory, this is not one to solve on an outdoor hike or while sitting around the campfire. Do it at home, after your outdoor activities are over for the day or weekend. You'll definitely need to concentrate and employ your powers of visualization, although the problem is certainly no more difficult than the "medium" category.
When you've finished, camp out on Read More to verify your solution.[Read More]
On the first Saturday of the month we often have a speed problem, an easy problem, or a stroke problem. Today we have a (not so) easy problem.
This one in a way is in two parts. There's the easy part in the beginning, and chances are you'll see that right away, even though White is on the verge of losing a piece. But then there's the second part. You'll see what we mean when you work on solving it. In any event, this little study is a great demonstration of an important winning technique.
Will you find a winning way easily or (not so) easily? This week, we suggest you take as much time as you need, and then click on Read More to see the solution and explanatory notes.[Read More]
Professor W. R. Fraser was a Canadian champion who also published books and studies on checkers, mostly notably The Inferno of Checkers, in which he used Dante's Inferno as a metaphor. We won't delve further into that interesting literary area today; instead we'll emphasize Prof. Fraser's academic side, by presenting one of his studies from a group Tom Wiswell included in a small collection that Mr. Wiswell called Canadian Checker Class.
We'd rate this one as fairly hard, though short of infernal. If you get the first move right and figure out the theme, you'll be able to solve it. Treat this as a professorial homework assignment rather than a descent into Hades, and see if you can get it, then burn your mouse on Read More to see the solution.[Read More]
This column appears on April 15, 2017. April 15, in the United States, is the infamous day on which income tax returns are due, along with any money you might still owe. Checker Maven staff get hit pretty hard every year; we certainly hope that you do better, regardless what country you call home.
We have a slight reprieve, as when April 15 falls on a weekend, we're ever so generously allowed until Monday to pay up. So, let's enjoy a checker problem before we face the music two days hence.
White is a piece down and it's not looking so good. Would you say it's kind of like the way the tax man hits us with a big bill when we can least afford it? But in this case, White can beat the tax man and break even (try to do that with the IRS)--- no cheating required.
Tax your brain instead of your wallet. The solution is elegant and pleasing, if every bit as hard to find as enough cash to pay that tax bill. See how you do, then file your return by clicking your mouse on Read More to get your refund--- or if not exactly a refund, a look at the solution and some explanatory notes.[Read More]
The picture above dates to World War II, when many did without in support of the war effort. Luckily, today, in the free world we generally don't have to do without, as a minimum, the basic necessities.
In checkers, there is "doing without" as well; in today's study, the winning side has to make do without "the move." This is called in textbooks, logically enough, "first position without."
We know that first position is a win with two kings against a king and a man, as long as the side with two kings has the move. But checkers is full of subtle twists, and there are wins in some of these positions without having the move on the stronger side, hence the name "first position without." There are supposedly twenty or so of these exceptions to the general rule. Below you'll find one of them.
There are a couple of ways to do this, depending on how White plays. One of them is as proposed decades ago in Dr. Call's book of "Midget" problems. Another line is preferred by our KingsRow computer engine.
Can you find the win here, or will you have to do "without"? See how you do, and then "without" hesitation, click on Read More to see the solutions.[Read More]