Krush, Irina(2432)
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12345678abcdefgh
Lee, Alice(2362)
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[%evp 0,95,28,28,24,9,9,9,43,43,48,30,26,13,0,8,18,19,13,18,18,18,13,11,24,2, 20,0,2,-16,-2,-14,-16,-13,-5,6,24,25,38,29,33,43,51,16,24,25,90,102,118,50,209, 236,301,353,399,330,328,403,397,351,351,351,356,330,343,219,219,227,256,252, 252,222,261,258,266,271,266,246,247,247,247,252,251,246,246,253,248,238,244, 247,247,249,280,263,263,281,292,304]1.d4Nf62.c4e63.Nf3Bb4+4.Bd2...4.Nbd2attempts to win the bishop pair and is also an option, but Black also has the optionO-O5.a3Be7, which can lead to complications.4.Nc3transposes to the Nimzo-Indian Defense (3. Nc4 Bb4 4. Nf3), but one of the main reasons of 3. Nf3 is to prevent the Nimzo-Indian.4....Bxd2+Black can also defend the bishop without trading it, but it is reasonable that Krush traded the bishops, especially in a game where she only needs a draw.4...a54...Qe74...c55.Qxd2d56.cxd5?!...I think Lee should keep the tension in the center with6.e3because Black's bishop still needs to find a place to develop, and White can play for a space advantage.6....exd57.Nc3Bf5?!This move is slightly inaccurate because it gives White a short-term opportunity to gain space.7...c68.e3Bf58.e3?!...8.Qf4!White gains a tempo by attacking the bishop, and gains space by playing h2-h3 and g3-g4.g69.e3Nbd710.h3(10.Nb5is also possible, but Black can equalize with the concrete lineO-O11.Qxc7Qxc712.Nxc7Rac813.Nb5wins a pawn, but Black probably has enough counterplay with an active rookRc214.Nd6Rxb215.Nxf5gxf516.Bd3Ne4)c611.g4Be612.Bd3Both sides will probably castle on the queenside, and Black's bishop is not useful at the moment.8....O-O9.Bd3Bxd310.Qxd3c6This is a Carlsbad pawn structure with both pairs of bishops traded, so Black does not have any potential space disadvantage.11.O-Oa512.Na4...12.a3If White tries a minority attack on the queenside, Black can easily react by playingNbd713.b4b5!when White does not have enough pieces to take advantage of the weak c6-pawn, and Black is going to move ...Nd7-b6-c4 quickly. For example, after14.Ne2Nb615.Ne5Qc716.Rfc1Nc4White cannot win the pawn, and Black has an advantage because of White's passive position.12....Ne413.Rac1...13.Ne5f614.Nf3Nd713....Nd714.Nc5Ndxc515.dxc5Qe716.Nd4...White is holding onto the c5-pawn through pinning the knight after Qa3, and if Black takes the pawn, she will have to give up the c6-pawn by playing ...b7-b6 to save the knight.16....a4I think this move is played slightly too early and Black should wait until White defends the pawn to play ...a5-a4. White cannot make progress without defending the c5-pawn.16...g617.Qc2(17.Qa3is the other way to defend the c5-pawn, but White is not making progress on the queenside.h5)a4Any attempted pawn break from White will be met with Black's rooks taking the open file.18.b3axb319.axb3Ra3White does not have time to fight for the open a-file because she needs to keep the c5-pawn defended.20.b4Rfa817.f3Nxc5?!Krush ends up exchanging a pair of pawns, but she creates an isolated pawn that could lead to a long-term disadvantage. Black does not have any weaknesses, so her position is completely okay if she does not take the pawn. White's knight may move to d6, but Black should not worry too much about it because the knight is not very useful there.17...Nf6is also good for Black.18.Nf5Qe619.Nd6Rfb8White's pieces are too far away to create an advantage with the knight on d6.17...Ng518.Nf5Otherwise Black plays ...g7-g6 and White does not have squares to move her pieces to.Qe6(18...Qf619.Nd6Ne6(19...Qxb2)20.Qc3Qxc321.Rxc3Rfd8)18.Qa3b6This is the only move because Black cannot keep the pawn while defending the knight.18...Ra5?Black cannot hold onto the pawn because she would lose her knight.19.Rc3Rc820.b4+−19.Nxc6Qf620.Nb4?!...20.Nd4prevents Black from playing . ..d5-d4 and leaves the d-pawn "isolated" instead of "active."20....Rad820...d421.Nd5Qd6(21...Qd822.Nxb6(22.e4f523.Nxb6Qxb624.Qxc5Qxc525.Rxc5fxe426.fxe4d327.Rd1)Qxb623.Qxc5Qxc524.Rxc5dxe3)22.e4f523.Rfd1fxe424.fxe421.Rfd1...21.Rcd1Qg5(21...d422.exd4Black cannot take the pawn because afterRxd4, White has23.Nd5Qe524.Ne7+Kh8(24...Qxe725.Rxd4)25.Nc6(25.Qc3also wins material.)Rxd126.Nxe5+−)22.Rd4Black has an isolated pawn and might lose the pawn for compensation.21....d4!22.e4...22.exd4does not win a pawn due to Black giving check as a resource.Rxd423.Nd5Qe524.Ne7+Kh825.Nc6Rxd1+Now Black takes the rook with check, which is why White should have played 21. Rcd1 (there is no check).22....Rd6?!22...d3!Krush needs to activate her pawn further in order to gain space for her queen.23.Qc3(23.Nxd3Nxd324.Rxd3Rxd325.Qxd3Qxb2)Qxc324.Rxc3f525.exf5Rxf5White cannot win the pawn and Black's pieces are too active for White to gain an advantage.23.Nd5Qg524.Nxb6!...Lee takes the material and now it is up to Krush to prove compensation for the pawn. It turns out that she does not have concrete counterplay, and should search for the best position to defend down a pawn.24....Nxe4??This move loses a knight due to two pieces being under attack after White's next move.24...Rg625.g3(25.Rc2?Protecting the pawn with the rook loses material afterd326.Rxd3as White has to give up the exchange because the b6-knight and c2-rook cannot be simultaneously protected.(26.Rf2Rxb6)Nxd327.Nd5f528.Qxd3fxe4Although the material is equal, there are open files for Black's rooks and White's king could soon be in danger.)Nxe4(25...Rxb626.Rxc5Qe3+27.Qxe3dxe328.Rc2f529.exf5Rxf530.Kg2Black may have enough counterplay for a draw, but this position is very hard to evaluate during a game, especially when there are no concrete resources for Black while being down a pawn.)26.Nd7Rd827.fxe4Rxd728.Rc5Qd829.Rdc1It looks like Black cannot prevent the threat of 30. Rc8, but Black has the resourceQf8!30.Qxa4(30.Rc8Rd831.Qxf8+Rxf832.R8c4Rb633.Rxd4Rxb234.Rxa4Re8Black has enough counterplay for the pawn, and it is not difficult to hold a draw from here.)Rgd6Black is down a pawn, but still has chances to hold a draw due to a passed pawn and White's weakened king.24...Rxb625.Rxc5Qe3+26.Qxe3dxe327.Rc225.Nc8+−...I think that Krush did not see this move, as she spent 22 out of the remaining 31 minutes on the next move. Black cannot defend the rook and knight simultaneously, so she will have to lose one of them.25....d3?!Rook moves do not save the knight.25...Rg626.Ne7++−25...Rdd826.Ne7+Kh827.fxe4+−26.fxe4+−...White is up a knight without any compensation for Black.26....Rd727.Qc5Qd828.Nb6Rd429.Nd5Rxe430.Rxd3Rfe831.Rdd1Qh432.Qf2...White loses a pawn from this exchange, but it could make the winning task simpler without queens.32....Qxf2+33.Kxf2Re2+34.Kf3Rxb235.Re1Rd836.Re2Rb537.Ne7+Kf838.Rc8Rxc839.Nxc8Rf5+40.Ke4g641.Nd6Rf142.Kd4f543.Nc4Kg744.Kd3f445.Ke4Kf646.Nd2Rh147.Nf3g548.Re1Black now has to trade rooks down a knight, so Krush resigned.1-0