The daily position for Sunday 20 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 →
Black to move. the model predicts 31% at this level.
47…♖︎b3+ — the natural move · the fair stop: the line may end here
48…gxf3 — routine — shown for completeness, never demanded
49…♗︎c2 — 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
Ponomariov found it · 0-1
the game ended inside the printed line — full game ↗
The field
44% of the 9 committed lines here found the key move — the model predicted 31% at this level.