IM Carissa Yip (United States of America) beat GM Alexandra Kosteniuk (Switzerland) in round 7 of the 46th FIDE Chess Olympiad Samarkand 2026 (Women), in 51 moves.
The game turned on 43...f3. Before it, Stockfish had the position as a small edge for White (+1.00); one move later, winning for White (+4.99).
Stockfish wanted 43...Rb1 instead. Can you see why? And 44.R2a6+, the engine's best reply, came straight back.
It began as the Petrov's Defense: Modern Attack.
Replay it move by move, then take the key position on against the engine.
- White
- IM Carissa Yip, 2468 · United States of America
- Black
- GM Alexandra Kosteniuk, 2495 · Switzerland
- Result
- 1–0 in 51 moves
- Opening
- Petrov's Defense: Modern Attack · C43
- Event
- 46th FIDE Chess Olympiad Samarkand 2026, Women, Round 7 · Samarkand, Uzbekistan
- Key move: {0}
- 43...f3
- Engine’s choice
- 43...Rb1