Rework check/pawn-push/recapture extension gating on real SEE (GetMoveSee, generalized from GetCheckSee), restrict LMR to leftover moves only, and tighten recapture's window back to 1x after measuring a 6.8x node blowup from sharing the wider window.

Head-to-head match at 1170 games confirms parity with the prior head (score=0.510, LLR still between bounds) -- landing as a neutral-or-better baseline rather than a regression.

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