Daily Chess Improvement: Real Game Chess Tactic!

This was an actual chess game that took place at the Russian Women's Superfinal Chess Championship

White is former Women's World Chess Champion Kosteniuk and black is Russian Women's Chess Champion Gunina. Black just played 59...b3. How should white proceed in this chess position?

No. 1-1

Alexandra Kosteniak missed a winning move - 60. Nc6!!!

  1. Nc6!!! Qg2+, 61. Kc5! Qc2+, 62. Kb6 b2, 63. Re1+! Kd7, 64. Rd5+ Kc8, 65. Rd8#

Actually she made a bad move - 60. Nxb3?