哦，降落伞！
Oh CHUTE!
题目详情
January’s puzzle proved pretty tough…maybe too tough. So, February’s puzzle is the same, but with a new, hintier title: “Oh CHUTE!”
解析
只有少数精明的解谜者发现，这个谜题涉及下棋， 但在滑梯和梯子棋盘上而不是在普通的国际象棋棋盘上！行数 编号为 0,1,…,9，列编号为 z,a,…,i。
游戏结束时，白棋处于受制状态，唯一的棋步是 Kc8 （通过梯子）。 （Kxi3，通过 Kh0，是另一个有趣的选项，但它 仍然会受到女王在 a0) 上的检查。
恭喜 Joey Thompson，本月随机选出的获胜者 Jane Street T 恤！
Original Explanation
As only a few astute solvers figured out, this puzzle involved playing chess, but on a Chutes and Ladders board rather than a regular chess board! The rows were numbered 0,1,…,9, and the columns lettered z,a,…,i.
Where the game leaves off, white is in check, and its only move is Kc8 (via the ladder). (Kxi3, via Kh0, is another intriguing option, but it would still be in check by the queen on a0).
Congratulations to Joey Thompson, this month’s randomly-chosen winner of a Jane Street t-shirt!