The daily position for Tuesday 15 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 71% at this level.
64.♔︎b2 — the natural move · the black knight cannot flee
65.♘︎xc3 — the natural move · the fair stop: the line may end here
66.♔︎xc3 — 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 on64.♘︎c5♘︎c365.♘︎xe6♘︎e266.♔︎d2♘︎g367.♔︎e3♔︎d768.♘︎c5+♔︎c669.♔︎f4♘︎e2+70.♔︎g5♘︎xd471.e6♔︎xc50-1full game ↗
The field
64% of the 25 committed lines here found the key move — the model predicted 71% at this level.