1.e4c52.Nc3Nc63.f4g64.d3Bg75.Nf3d66.Be2e67.O-ONge78.Qe1Nd49.Bd1O-O10.Nxd4cxd411.Ne2f512.Ng3Qc713.Bd2Qb614.Rb1Bd715.Ba5Qc616.h4Rac817.h5Rf718.Bd2Qa619.a3Bc620.Bb4Rd821.Bf3...We pick up here in a roughly equal position with numerous pawn trades and breaks to be aware of.21....Bd7Black spent 19 minutes here, and is now down to six minutes (with a 30-second increment) for the remainder of the game. The position is roughly level, but massively complex considering the number of pawn breaks for each side. Other flexible moves, like:21...Bf6kept things roughly level, but had the added benefit of introducing ... Rf7-h7+ ideas after h5xg6, as well as ... Bf6-h4 to pin the g3-knight, against White's intended plan of Kg1-h2 and Rf1-h1. Of course, this was not White's only plan in this position, nor necessarily what she intended in the event of 21. ... Bf6. But now22.Kh2e5∓favors Black, with h5xg6 less favorable as it introduces ... Rf7-h7+ ideas.22.Kh2Bc822...Re8, preparing ... e6-e5, or22...Bf6, again, were also flexible options.23.Rh1...White continues with her plan, and, with Black's clock dwindling, it is becoming increasingly important that Black commits to something.23....e5!?There are so many variations to calculate in this incredibly tense position, and most of them favor Black.23...fxe4was simpler, and even offered counterplay after24.Nxe4(24.Bxe4?!e525.fxe5Bxe5⩱)Rxf425.Bd2Rxf3!?or(25...Rff8with a level position)26.gxf3Rf827.hxg6Nxg6when White must find the quick28.Qe2!⩲to have any advantage, as ... e6-e5 will cover the h3-square from White's queen, so it's really finding this plan or not having an initiative.24.Bd2?!...With the clock advantage, White wants to preserve as much tension as possible and force her opponent to make the hard decisions. But24.hxg6!was the best move, improving the h-rook before anything else.Nxg6(24...hxg6!?is also playable, but White can now open up the kingside even more:25.exf5Bxf526.Nxf5Rxf527.Bd2Now covering the f-pawn makes more sense, as there are fewer chances to mate along the h-file.Re828.Kg1d529.Qh4exf430.Rf1Qf631.Qh3g532.Bg4Re533.g3±)25.Nxf5opens the e1-h4 diagonal for the queen, andBxf5(25...Nxf426.Qh4±)26.exf5Rxf5(26...Nxf4?27.g3+−)27.Bd5+Kh828.Kg1!sees White with the initiative, making use of her intended attack on the h-file. Play could continueexf429.Be4Re5(29...Rf6??30.Bxg6Rxg631.Qh4+−)30.Rxh7+!?Kg8(30...Kxh731.Qh4+Bh632.Qxd8+−)31.Qf2d532.Bxg6Qxg633.Rh4⩲24....exf4!The right order of captures to exploit problems along the f-file.25.Ne2...Recognizing the problems along the f-file, White looks to reinforce her grip of the f4-square. But this is too slow!25.Bxf4would leave the f4-bishop exposed, butfxe426.Qxe4covers it, andd527.Qe1!makes use of the newly opened e-file to meetRxf4with capturing the hanging e7-knight, although(27...Qf6∓might be an improvement for Black)28.Qxe7and some hopes for counterplay, although afterRff8⩱Black's bishop pair offers an advantage on the open board.25....g526.h6...26.exf5Bxf5∓sees Black consolidate, as well.26....Be5The pawn mass is too strong, and White's king is in hot water.27.Bh5Rf628.Kg1fxe429.dxe4d3A lovely pawn break to bring the a6-queen quickly into the game. This a nice example of how opening up the board can turn long-range pieces from passive to active in the blink of an eye.30.cxd3Qxd331.Rd1Qxe432.Bf3Qf533.Nc3g434.Be4Qg535.Nd5Bd4+!White's king now has to go on a long walk!36.Kf1Nxd537.Ba5Ne3+38.Ke2f3+39.gxf3gxf3+40.Kd3Re841.Rg1Ng242.Bxh7+Kf843.Qb4Bxg144.Qc3Bf5+45.Kc4Bxh70-1 Black wins.0-1