Oskemen Open Masters 2026 · 2026.07.25 · Elo 2433/2646 · tactic · ★★★
The daily position for Sunday 4 October 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 →
Black to move. the model predicts 34% at this level.
The solution
57…♘︎xe2!(not57…♘︎xb3+?58.♔︎e3=)58.g4♘︎g359.gxh5♘︎xh560.♔︎c3e361.b4(61.♔︎d3is as good:61…♔︎f462.♔︎c3e2−+)61…axb4+−+
57…♘︎xe2 — most players miss this
58…♘︎g3 — most players miss this · worth +1
59…♘︎xh5 — the standard move
60…e3 — almost nobody finds this · worth +1 · the fair stop: the line may end here
61…axb4+ — routine — shown for completeness, never demanded
“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
Sargsyan found it · 0-1
the game went on58.♔︎xe2♔︎d459.♔︎e1e360.♔︎e2♔︎e461.g4hxg462.h5g363.♔︎f1♔︎f30-1full game ↗
The field
43% of the 7 committed lines here found the key move — the model predicted 34% at this level.