Step 1 of 4
White to move · Mate in 1
Check on the long diagonal for mate.
Check on the long diagonal for mate.
Two bishops side by side make a wall the enemy king cannot cross. Use them to push the king to the edge and then into a corner, with your own king close by to take away squares. You need both bishops for the final checks, so keep them out of the enemy king's reach.
Every move is checked with an endgame tablebase, which knows the exact result of every position with up to seven pieces. The computer defends perfectly, and if a move throws the result away, the trainer stops and shows you a better one.