A beautiful move, which allows Black to win material with the help of a small combination.
Black has an extra pawn and the better position. The rest of the game was just a technical realisation of a large advantage.
24.Rc1 Re8 25.Ng1 Bg7 26.Re1 Rd8 27.Ne2 Ne3+ 28.Kg1 h5 29.Nc1 Qd5 30.Nd3 Qxf3 31.Qe2 Qd5 32.b4 Re8 33.Qf2 Kh7 34.Nf4 Qb7 35.Rc1 Rc8 36.Rxc8 Qxc8 37.Nd3 Qc4 38.Qe2 Qe6 39.Nf4 Qe4 40.Nh3 Qb1+ 41.Kf2 Qxb2
Unity Chess Club
Lazaro Bruzon Batista 2584 Konstantin Sakaev 2639 Ubeda 2001 Black to move
In playing his last move (17.g4-g5), White missed a tactical nuance:
In the variation 19.Nd4 dxe4 20.Qxe4 Bc5 21.c3 Bg4! 22.Rd2 Bf5 23.Qxf5 Qxf5 24.Nxf5 Bxg1, White again loses because of the pin, only this time on a different diagonal.
Black wins a pawn, in addition to which he has the advantage of bishop over knight, and the more active major pieces – White’s position is hopeless.