Find the winning move. Make any legal move: if it is not the right one, it is taken back and you can try again.
One move
About this position
It is one of the oldest known mates: it already appears in medieval Arabic manuscripts, from the days of shatranj, the direct ancestor of modern chess. In that game the rook and the knight moved just as they do today, so this mate, which uses only those two pieces, has come down to us unchanged. The pattern is simple. The rook gives right next to the king, on the edge of the board, and the knight protects it and also covers the square the king could flee to. The king has to be in a corner or very close to one, with no way out. Being ahead in material is worthless if the opponent’s next move is . What to remember: before you count pieces, check that your king is safe, and an enemy knight near your corner always deserves a look.