Wroclaw Open A 2025 · 2025.12.17 · Elo 2520/2522 · interesting · ★★★
The daily position for Thursday 10 September 2026. It is still open to solve — the grader reads your whole line, sidelines and evaluation included, before anything here is shown. Cover the solution and solve it first →
White to move. the model predicts 44% at this level.
The solution
56.♕︎f2!(not56.♘︎xc4?♖︎xc457.bxc4♗︎xg258.f7♕︎d8−+)56…♗︎d557.f7♗︎xf758.♕︎xf7(not58.♘︎xc4?♗︎xc459.bxc4♖︎c660.♕︎e3♕︎c5=)58…♕︎b6(58…♕︎c7is as good:59.♕︎f8+♕︎b860.♕︎f3++−)59.♕︎e8+♕︎b8(59…♔︎a7is as good:60.♕︎e7+♔︎a661.♘︎xc4+−)60.♕︎a4++−
56.♕︎f2 — most players miss this
57.f7 — hard to find · worth +1
58.♕︎xf7 — hard to find · worth +1 · threatening ♕︎b7#
59.♕︎e8+ — most players miss this · worth +1
60.♕︎a4+ — the natural move
“hard to find”, “the natural move” and the rest describe how often this move is played by Maia-2, weighted across the 1500/1900/2000 audience the difficulty model is fitted on — a model of human play, not a count of anyone who solved this position.
Members can take this away as a PGN — the diagram, the verified line and their own analysis in one file, for a database, Anki or Chessable.
What happened at the board
Ilamparthi found it · 1-0
the game went on56…♖︎d557.f7♖︎xd658.f8=♕︎+♖︎d859.♕︎2c51-0full game ↗
The field
30% of the 20 committed lines here found the key move — the model predicted 44% at this level.