The task
- To move
- Light
- Difficulty
- Hard
- Goal
- win in 4
On the board: 0 men and 1 kings for Dark, 2 men and 2 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 4-8. The main line runs: 4-8 · 7-10 · 8-3 · 10-14 · 1-6 · 14-9 · 6x13.