The Checker Maven

Horsefall's Stroke

Continuing with our ongoing series taken from Willie Ryan's Tricks Traps & Shots of the Checkerboard, this month we present a complex problem that Willie himself admired greatly, as he clearly states below.

"No compendium of classical coups would be complete without including the historical Horsefall Stroke, which I consider one of the great masterpieces of scientific play. Here's the run-up:


11-15 4-8 14-21
23-18 25-22 18-14
8-11 8-11 9-18
27-23 29-25 22-8
11-16 10-14 1-6*
18-11 31-27 8-4
16-20 6-10---A 6-10*
24-19 19-15 4-8
7-16 10-19 3-7*
22-18 21-17 8-11---B
WHITE

BLACK
Black to Play and Draw

A---Weak, but drawable. The following makes an easier draw: 3-8, 19-15, 2-7, 22-17, 7-10, 17-13, 10-19, 26-22, 19-26, 30-23, 14-17, 21-14, 11-15, 18-4, 9-18, 23-14, 6-9, etc.

B---Strongest, forming position illustrated. If instead of 8-11, white moves 25-22, the only moves to draw are: 7-11*, 8-6, 2-9, 22-18, 9-13*, 18-14, 13-17, 14-10 (23-18, 21-25, 30-21, 19-24 results in a draw), 5-9, 23-18, 9-13, 18-15, 17-22."

We're well beyond the introductory material in Mr. Ryan's classic book, so you can't expect an easy ride. Don't horse around; try to rein in the problem, and then click on Read More to gallop directly to the Willie's solution.



Solution

Continue from diagram: 20-24*, 27-20, 10-15*, 11-18, 7-10, 20-11, 10-15, 23-16, 15-31, 25-22, 12-19, 22-17, 19-23, 11-8 (17-14, 2-6), 31-26, 8-3, 26-22, 17-13, 22-18, 3-8, 5-9, 13-6, 2-9, 8-11, 9-14; a draw.

07/21/07 - Category: Books - Printer friendly version
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