1.Nf3d52.g3Nf63.Bg2e64.O-OBe75.c4b6A very rare response to Yip's move order. Typically Black plays ... c7-c6 to close the h1-a8 diagonal against White's light-squared bishop, rather than invite such opportunities.6.Qa4+Qd77.Qc2Bb7White wanted her queen on the c2-square, defending the c4-pawn and preparing possible e2-e4 ideas. Black did not want her queen on the d7-square, but she did not want either of her knights or her bishop there, either, so 6. Qa4+ was a success.7...Nc6would prevent Nf3-e5, but8.cxd5exd59.Nc3leaves Black unable to defend the d5-pawn with ... c7-c6!8.Ne5...Yip gives her opponent no time to even think about ... d5xc4 to trade off her bad bishop.8....Qd89.d4O-O10.Rd1Nbd7A bit passive, considering White is tempo-up.10...c5would be the most confrontational.11.Nc3cxd412.Rxd4Nbd713.Nxd7Qxd714.cxd5exd5±might have been the best Black could ask for. The isolated pawn will be weak, but at least a set of minor pieces has been traded. Still, this position nicely illustrates why 5. ... b6 was such an odd commitment, as the bishop makes no sense stuck behind this pawn.11.cxd5exd512.Nc3...Yip chooses to keep pieces on the board.12.Nc6Gripping the c6-square and winning the bishop pair was definitely on Yip's mind. But the light-squared bishop is not so good, and White welcomes d4xe5 transformations, so chooses to stay put and let Black make the decisions.12....c613.Qf5Nxe514.dxe5Nd7?!14...g6This intermezzo helped tremendously.15.Qf4(15.Qh3!?Bc816.exf6!Bxh317.fxe7Qxe718.Bxh3∞is a funny position with three pieces for the queen!)(15.Qf3Nd7is what Black would have wanted, as now e2-e4 has less bite.16.e4d4!A thematic temporary sacrifice, as now17.Rxd4Nxe5gives Black a fine game.)Nh516.Qd2Qc717.e4d418.Qxd4Rfd8∞with compensation and complications!15.e4!Bc8??Black does not navigate the complications correctly.15...d4?16.Rxd4comes with deadly pressure on the pinned knight, now.15...g6!was again necessary.16.exd5Nc517.Qh5Qd718.dxc6...White has won two pawns, kept her lead in development, and added some kingside pressure to boot.18....Qc719.Nd5Qd820.Nf6+!...Winning the queen.20....Bxf621.Rxd8Rxd822.c7Having to part with a rook as well, Black resgined.1-0