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19... Bd6 20. Nd3
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Black trades bishops but still cannot deploy the queen pin as the trade threatens black’s queen. |
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20... Bxf4 21. Nxf4 Qxh2
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With the bishop gone black makes up one more point from the lost knight, albeit a risky point. White will have an open h file for attacking black’s castle. On the other hand, Rg3 exposes the queen to a rook pin. The difference is five points (rook) versus four (rook/queen trade). |
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22. O-O-O
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Good move for white, defending the threatened rook, except the knight is undefended. |
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22... Qxf4+ 23. Kb1
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While d5 is vulnerable, black wants rooks on center files. The far flung pawn can wait. |
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23... Rfe8 24. Qd3 c6 25. Qh3
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Black can temporarily counter the h file assault with h6. So another pawn, while risky, doesn’t lead to immediate disaster. |
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25... Qxf2 26. Rdf1 Qc5
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The idea here was that Re2 provides a horizontal assault on the White Castle pawns more brutal than white’s vertical h file attack. |
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27. Rf3
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Ok, fatal blunder. I actually entered Re2 and just noticed Rg1’s drawers were dropped before hitting submit. Reset, game and match. |
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27... Qxg1+ 28. Rf1
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No escape hatch open for the king. |
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28... Re1+ 29. Rxe1 Qxe1#
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(1925)