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the library · reviewed 2026-09-07

Sarana – Smirnov

KazChess Masters 2026 · 2026.07.01 · Elo 2668/2436 · interesting · ★★★
The daily position for Tuesday 1 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 →
. . . . . . . r
. . . . . . . P
. . . . . . . .
. . . . p . P R
p K . . . . k .
. . . . . . . .
. . . . . . . .
. . . . . . . .
White to move. the model predicts 41% at this level.

The solution

53.g6! (not 53.♖︎h1? ♔︎xg5 54.♔︎xa4 ♔︎g6 55.♖︎e1 ♖︎xh7 =) 53…♔︎xh5 54.g7 (not 54.♔︎xa4? ♔︎xg6 55.♔︎b5 ♔︎f5 56.♔︎c4 ♖︎xh7 −+) 54…♖︎xh7 55.g8=♕︎ ♖︎a7 (55…♖︎h6 is more resilient: 56.♔︎c5 a3 57.♕︎e8+ ±) 56.♕︎e6 ♖︎b7+ (56…♖︎g7 is more resilient: 57.♕︎h3+ ♔︎g5 58.♕︎g3+ ±) 57.♔︎c5 ±

“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

Sarana found it · 1-0

the game ended inside the printed line — full game ↗

The field

94% of the 17 committed lines here found the key move — the model predicted 41% at this level.

Notes from the room

5pts lost for strange software analysis of QvR where clear reasonable moves pick up the pawns. In my opinion the allowed solution is best only for obscure software reasons between nearly identical worth moves. Boo! :)

53.g6 ♔︎xh5 [53…♖︎a8 ? 54.h8=♕︎ ♖︎xh8 55.♖︎xh8 ♔︎g5 +−; 53…e4 54.♖︎e5 ♔︎f4] 54.g7 ♖︎xh7 55.g8=♕︎ ♖︎a7 +−

5pts lost for strange software analysis of QvR where clear reasonable moves pick up the pawns. In my opinion the allowed solution is best only for obscure software reasons between nearly identical worth moves. Boo! :)

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