A previously unreleased endgame problem based on an online game.
Better than a machine
LEVEL: FOR ADVANCED PLAYERS
This is the game 27418 from MiGs, white move 41. MLA at its highest level (Black) will win against our friend boulet (White), but only after 7 long moves (13 half moves).
You, who are more imaginative than a machine, will you able to do it in just 4 moves?
There are several possible solutions.