1.c4c62.Nf3d53.e3Nf64.d4e65.Nbd2Be76.b3O-O7.Bb2Nbd78.Bd3b69.e4...Typically, White castles before opening the center. This allows Black to equalize.9....dxe410.Nxe4Bb711.Qe2c512.O-O-O...Now we see Keymer's intentions, creating an imbalanced position.12....Qc713.Kb1Nxe414.Bxe4Nf614...Bxe4+seems simpler, as it routes the knight to f6 with tempo.15.Qxe4Nf616.Qe5Qb7and White has nothing better than17.dxc5Bxc518.Qg3=15.Bc2...15.Bxb715....cxd416.Nxd4Rad817.f3a618.g4Bc519.Rd3b520.Rhd1?!...20.cxb5!While this thematic break had been on Black's agenda since White castled long, the timing was not quite right.Nd5(20...axb5?21.Nxb5Qf422.Be5±)21.Rdd1!White would have to appreciate this subtle move, defanging Black's artificial knight.Nb422.Be4Bxe4+23.Qxe4±20....bxc421.bxc4Bxd4?!These simplifications favor White's open pieces, despite the weakened pawn structure.22.Rxd4Rxd423.Rxd4Rb824.g5Qb625.Qe5!...White should be close to winning.25....Bxf326.Rd6Qg1+27.Rd1Qb627...Qa728.gxf628.Rd3??...28.Rf1was objectively best:Ne829.c5!As in the game, the idea hinged on this deflection. Black has nothing better than(29.Rxf3??Qg1+-+)Qxb2+and can resign after(29...Qb730.Rxf3!Qxf331.Qxb8+−)30.Qxb2Rxb2+31.Kxb228.gxf6would keep some advantage afterBxd129.Bxd1Rd830.Be2when the bishops should dominate the rook, but perhaps White was concerned about king safety.28....Qg1+?!28...Be4was the move that Black could not have played had White chosen 28. Rf1.29.c5Qxb2+30.Qxb2Rxb2+31.Kxb2Bxd332.Bxd3Nd533.Bxa6when White should be winning but has to prove it.28...Ne8loses like above to29.c5(29.Rxf3??Qg1+-+)29.Bd1?...29.Rd1!Qa7(29...Bxd1??30.Qxb8+Ne831.Qxe8#)30.gxf6Bxd131.Bxd1Rd8should be winning for White.29....Rc830.Qc7??...White gets too clever.30....Re8and suddenly White has no time to attack due to the dual threats of ... Bf3xd1 and ... Bf3-e4.31.Rd2...31.Qd6??Be431....Bxd132.gxf6Bh5+33.Bc1...33.Kc2gxf634.Rd8Qf2+35.Kb3Rxd836.Qxd8+Kg737.Ba3should still win for Black afterQe3+38.Kb2Qe2+39.Kc3Qxh233....Bg6+34.Kb2gxf6-+35.h4Kg736.c5Qg437.Qb7Qf438.Ka3Qc439.Bb2Qxc5+40.Qb4Rc841.Rd6a542.Qxc5Rxc543.Bd4Rc444.Kb3Bd345.h5a4+46.Ka3Be247.h6+Kxh648.Bxf6Kg649.Be7h550.Rd8Kg751.Bf8+Kh752.Be7h453.Bf6Kg654.Be7h355.Rh8Bg40-1