Liaocheng Dongchangfu Cup · 2026.07.17 · Elo 2565/2618 · defensive · ★★★
The daily position for Sunday 16 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 33% at this level.
The solution
44…♔︎e4!(not44…♔︎e3?45.h6g346.♖︎g6g247.h7+−)45.♔︎e1g346.♔︎f1♖︎a1+47.♔︎g2♔︎f4(not47…♖︎a2+?48.♔︎xg3♖︎a3+49.♔︎g4♖︎a250.h6+−)48.♖︎f6+(48.h6is as good:48…♖︎a2+49.♔︎g1♖︎a1+=)48…♔︎g5=
44…♔︎e4 — most players miss this
45…g3 — the standard move
46…♖︎a1+ — almost nobody finds this · worth +1
47…♔︎f4 — the natural move
48…♔︎g5 — the natural move
“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
Grebnev played ♔︎e3 instead · 1-0
in the game44…♔︎e345.h6g346.h7g247.♖︎g6♖︎xa648.h8=♕︎g1=♖︎+49.♖︎xg1♖︎a1+50.♔︎c2… on to move 71 · 1-0full game ↗