Portuguese Top League · 2026.07.14 · Elo 2498/2505 · tactic · ★★★
The daily position for Wednesday 23 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 36% at this level.
The solution
30.♕︎e4+!(not30.cxb4?♘︎xb431.♗︎xb4♖︎xb432.♕︎xf7♖︎b1+⩲)30…g631.♕︎e8♔︎g7(31…♖︎xc5is as good:32.♕︎xf7+♔︎h833.♕︎f8++−)32.cxb4♖︎xc5(if32…♘︎xb4then33.♗︎f8+♔︎g834.♗︎xh6++−)33.bxc5+−
30.♕︎e4+ — the natural move
31.♕︎e8 — almost nobody finds this · worth +1
32.cxb4 — almost nobody finds this · worth +1 · the fair stop: the line may end here
33.bxc5 — 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
Gorodetzky found it · ½-½
the game went on31.♕︎d5♘︎d832.♕︎xd8♖︎xc533.cxb4♕︎d534.♕︎e8♖︎c335.f4♖︎c236.h4h5… on to move 49 · ½-½full game ↗
The field
62% of the 8 committed lines here found the key move — the model predicted 36% at this level.