Mate in 3 · No. 500 · HarderTwo rooks and two knights
White to play and mate in three.
- 1. Nxc5 Nf3 2. Nd7+ Ka8 3. Rc8#
Other defences
- 1. Nxc5 Ka8 2. Rc8#
- 1. Nxc5 Nxd3 2. Nd7+ Ka8 3. Rc8#
- 1. Nxc5 Nxg2 2. Nd7+ Ka8 3. Rc8#
- 1. Nxc5 Nc2 2. Nd7+ Ka8 3. Rc8#
- 1. Nxc5 bxc5 2. Rxb5+ Ka8 3. Rc8#
- 1. Nxc5 e4 2. Nd7+ Ka8 3. Rc8#
- 1. Nxc5 b4 2. Nd7+ Ka8 3. Rc8#
- 1. Nxc5 a4 2. Nd7+ Ka8 3. Rc8#
Position
- White
- king on a6, rooks on b3 and c6, knights on a4 and d2, pawns on c3, d3, g2, g4 and h2
- Black
- king on b8, queen on c5, knight on e1, pawns on a5, b5, b6 and e5