Summer disappears and fall comes on fast in much of the northern hemisphere. Fall in turn will go by and then it will be winter.

But enough of such thoughts. Enjoy the fall season, and enjoy this month's speed problem, too. It certainly isn't hard, but it provides just enough of a visualization challenge to be interesting ... for the fifteen seconds we're allowing on our merciless Javascript clock.

September Speed Problem (medium-easy, 15 seconds)

When you're done, come back here and click on Read More to check your solution.

Solution

WHITE

BLACK
Black to Play and Win

B:W27,26,23,20,K17:B16,11,9,8,4.

11-15 20x11 9-14! 17x19 8x31 26-22 31-26 Black Wins.