the library · reviewed 2026-08-31

Audi – Bocharov

Aeroflot Open A 2026 · 2026.03.01 · Elo 2418/2553 · defensive · ★★

The daily position for Thursday 27 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 →

Black to move. the model predicts 46% at this level.

The solution

52…♗︎f6! (not 52…♕︎a2+? 53.♔︎h3 ♕︎a1 54.a8=♖︎+ ♕︎xa8 55.♕︎xg5 +−) 53.♕︎e2 (if 53.♕︎e6+ then 53…♔︎g7 ⩲) 53…♗︎g5 (not 53…♔︎f7? 54.♕︎d2 ♔︎g7 55.g4 ♗︎h4 56.♔︎h3 ±) 54.♕︎b2 (54.♕︎g4 is more resilient: 54…♗︎f6 55.♔︎f2 ♔︎g7 =) 54…♔︎g7 ⩲

52…♗︎f6 — most players miss this · the fair stop: the line may end here
53…♗︎g5 — routine — shown for completeness, never demanded
54…♔︎g7 — 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

Bocharov played ♕︎a2+ instead · 0-1

in the game 52…♕︎a2+ 53.♔︎h3 ♕︎a1 54.a8=♕︎+ ♕︎xa8 55.♕︎xg5 ♕︎a1 56.♔︎g2 ♕︎a2+ 57.♔︎f3 ♕︎xc4 58.♕︎e3… on to move 61 · 0-1full game ↗

The field

5% of the 21 committed lines here found the key move — the model predicted 46% at this level.

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