The task
- To move
- Dark
- Difficulty
- Hard
- Goal
- win in 4
On the board: 1 men and 2 kings for Dark, 1 men and 0 kings for Light. A long forcing line of four or five moves. Kings and tempo count more than material here.
What to look for
- Kings are on the board and their freedom to move backwards matters.
How the answer is checked
There is exactly one first move that forces the result; any other first move allows the defence to escape. Moves that keep the forced result are accepted later in the line, and a move that loses it is taken back with a short note.
Show the key move
The key move is 27-23. The main line runs: 27-23 · 21-17 · 23-18 · 17-13 · 18-14 · 13-9 · 14x5.