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1.Qa4+ Kc5 2.Rb5+ Perfectly safe, since the White Queen protects the White Rook. If White had two Rooks (instead of a Queen and Rook), this move would not be safe, since it would allow ... Kxb5. 2...Kc6 3.Qa6+ Still protecting the White Rook from ... Kxb5. 3...Kc7 4.Rb7+ Kc8 5.Qa8# |
