ch-ISR Open 2026 · 2026.01.26 · Elo 2537/2554 · interesting · ★
The daily position for Wednesday 19 August 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 80% at this level.
33.♖︎c8 — most players miss this · the threat is ♖︎c7 — what it plays next if the defence does nothing
34.♗︎b4 — almost nobody finds this · worth +1 · the fair stop: the line may end here
35.♖︎xh8 — 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
Sokolovsky found it · 1-0
the game went on35…♗︎d636.♕︎c8♕︎d537.♔︎b11-0full game ↗