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23... Rxf4 24. Nf1
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Maybe not for free since now the queen has her sights on the rook. |
 
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24... Qxe5 25. Rc2 Rd7
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White moves to threaten the king and black moves to protect. I had considered moving the bishop to g7 in order to threaten mate along the main diagonal, but I would not be able to do that if white checked the king with a rook on c7. |
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26. Nh2 Bg7
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Now the mate threat becomes obvious. |
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27. Ra2
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White moves to protect the a1 square from the black queen. |
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27... Rf2
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Black's rook moves in as an apparent sacrifice. If white's rook takes the black rook then checkmate follows in one move. White could move the d1 rook to d2, but black would exchange in response. |
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28. Rxf2 Qa1+
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Check but not quite mate. The king can escape to c2. |
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29. Kc2 Qa2+ 30. Qb2
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White's only move is to block with the queen. |
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30... Qxb2#
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And then checkmate! |
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(1823)