The one square that keeps both pawns

Sindarov is a pawn up, and the two that matter are the ones on c5 and f4. The pawn on c5 is attacked twice, so it cannot simply be left there. White's king sits on h1 behind a pinned pawn, and the white queen is doing all of the work on both wings at once. · Wei Yi vs Sindarov, Candidates Tournament, Paphos 2026