Groningen chess tactic Chess tactic, Puzzle Solving Black to move. How should black proceed? Source: ChessToday.net Chess Daily News from Susan Polgar
1. … Nb3+
2. Rb3 Rc2+
3. Kb1 Rd1#
N X b3+ forces mate
1. … Nxb3+
2. Rxb3 Rc2+
3. Kb1 Rxd1#
Mark
1. nxb3+ rxb3
2. rc2+ kb1
3. rxd1#
1…Nb3+ looks good to me. 2. Rxb3 is forced, allowing 2…Rc2+ and it’s all over. The rook on d1 is lost.
Nxb3 – Rc2 – Rxd1 forced mate.
1…. Nxb3+
2Rxb3 Rc2+
3Kb1 Rxd1#
1…Nb3 2. Rb3 Rd1 3. Kd1 Bc2 wins a pawn and the exchange.
… Nxb3+
Rxb3 Rc2+ Kb1
Rxd1#
1N+ R+ &mate
Nxb3+; Rxb3, Rxc2+; Kb1, Rxd1#