Remove dead ValueOfMaterialInTroubleAfterNull

Declared in chess.h, defined in dynamic.c, documented as the
nullmove-pruning safety-net sibling of ValueOfMaterialInTroubleDespiteMove
-- but it had zero call sites anywhere in the tree, only a comment in
search.c describing what it was conceptually meant to catch. Nothing
ever wired it in.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

3 files changed, 2 insertions, 44 deletions

diff --git a/src/chess.h b/src/chess.h
index fde5c6f..b0be749 100755
--- a/src/chess.h
+++ b/src/chess.h
@@ -4006,9 +4006,6 @@ FindEnprisePiece(SEARCHER_THREAD_CONTEXT *ctx, ULONG uSide);
 ULONG
 ValueOfMaterialInTroubleDespiteMove(SEARCHER_THREAD_CONTEXT *ctx, ULONG uSide);
 
-ULONG
-ValueOfMaterialInTroubleAfterNull(SEARCHER_THREAD_CONTEXT *ctx, ULONG uSide);
-
 //
 // pawnhash.c
 //
diff --git a/src/dynamic.c b/src/dynamic.c
index 2451fa6..b0bad91 100644
--- a/src/dynamic.c
+++ b/src/dynamic.c
@@ -665,45 +665,6 @@ Return value:
 }
 
 
-ULONG
-ValueOfMaterialInTroubleAfterNull(SEARCHER_THREAD_CONTEXT *ctx, ULONG uSide)
-/**
-
-Routine description:
-
-    Nullmove-pruning safety net: same as ValueOfMaterialInTroubleDespiteMove
-    but with a looser threshold (any valid en prise hint counts, not
-    just two) since this is guarding a cheaper, more speculative prune.
-
-Parameters:
-
-    SEARCHER_THREAD_CONTEXT *ctx,
-    ULONG uSide
-
-Return value:
-
-    ULONG : material value in trouble, or 0
-
-**/
-{
-    ULONG uPly = ctx->uPly;
-    ULONG u = 0;
-    COOR c;
-
-    if (_EnpriseSlotValid(ctx, 0, uSide))
-    {
-        c = ctx->cEnprise[uPly][0];
-        u = PIECE_VALUE(ctx->sPosition.rgSquare[c].pPiece);
-    }
-    if (_TrappedSlotValid(ctx, uSide))
-    {
-        c = ctx->cTrapped[uPly];
-        u = MAXU(u, PIECE_VALUE(ctx->sPosition.rgSquare[c].pPiece));
-    }
-    return u;
-}
-
-
 static void
 _IncrementMoveHistoryCounter(MOVE mv,
                              ULONG uDepth)
diff --git a/src/search.c b/src/search.c
index e6249b0..c434f48 100644
--- a/src/search.c
+++ b/src/search.c
@@ -2131,8 +2131,8 @@ Search(IN SEARCHER_THREAD_CONTEXT *ctx,
             // number of example FENs per bucket (same "capped FEN
             // sampler" idea as eval.c's MARGINSAFETY_EXCEEDED logging)
             // so these can be inspected by hand for genuine zugzwang
-            // our TotalNonPawnCount/ValueOfMaterialInTroubleAfterNull
-            // safety net is missing, vs. ordinary search noise.
+            // our TotalNonPawnCount safety net is missing, vs. ordinary
+            // search noise.
             static ULONG uFalsePositiveFenSamples[NC_TOTAL_BUCKETS];
             if (uFalsePositiveFenSamples[uNullCalibBucket] < 5)
             {