New telemetry.

1 files changed, 23 insertions, 1 deletions

diff --git a/src/chess.h b/src/chess.h
index 420e313..b9cba3d 100755
--- a/src/chess.h
+++ b/src/chess.h
@@ -1014,6 +1014,14 @@ MOVE_STACK;
 // which would have been a search-behavior change rather than a fix.
 #define JOINT_EXTRA_TIER_COUNT (6)
 
+// Null-move R-factor breakdown (post-move dump, root.c) -- bucketed by
+// SelectNullmoveRFactor's whole-ply R value (searchsup.c). R is
+// currently TWO_PLY (sparse material) or THREE_PLY + depth/6 (Crafty-
+// style growth), so real traffic never gets near this bound; sized
+// with headroom and clamped at the top bucket rather than tied exactly
+// to a formula that might grow later.
+#define NULL_R_BUCKETS (12)
+
 // 2026-10-03: PRUNE_VERIFY (GNUmakefile) -- shadow verification for the
 // DEEP PRUNE gate (ShouldLatePrune), answering a question the LMR-side
 // JOINT_EXTRA_VERIFY cannot: "this move was about to be skipped
@@ -1241,6 +1249,16 @@ typedef struct _COUNTERS
         // leftover pool near the leaves. Counts every move this was
         // applied to.
         UINT64 u64LMPPruned;
+        // 2026-10-05: extended futility pruning (EFP, search.c) -- same
+        // shape as u64LMPPruned above, for the other overt-skip (not
+        // reduction) mechanism in the move loop.
+        UINT64 u64EFPPruned;
+        // 2026-10-05: null-move R-factor breakdown -- which whole-ply R
+        // SelectNullmoveRFactor chose, and how often the null-move
+        // search at that R actually failed high. Indexed by R/ONE_PLY,
+        // clamped to NULL_R_BUCKETS - 1.
+        UINT64 u64NullMoveTriesByR[NULL_R_BUCKETS];
+        UINT64 u64NullMoveSuccessByR[NULL_R_BUCKETS];
 #ifdef PRUNE_VERIFY
         // [predicted-FH band][shipped depth bucket] -- see
         // PRUNE_VERIFY_BANDS above. Tries = moves the deep-prune gate
@@ -1985,6 +2003,9 @@ typedef struct _GAME_OPTIONS
     UINT64 u64JointExtraTries[JOINT_EXTRA_TIER_COUNT];
     UINT64 u64JointExtraResearch[JOINT_EXTRA_TIER_COUNT];
     UINT64 u64LMPPruned;
+    UINT64 u64EFPPruned;
+    UINT64 u64NullMoveTriesByR[NULL_R_BUCKETS];
+    UINT64 u64NullMoveSuccessByR[NULL_R_BUCKETS];
 #ifdef PRUNE_VERIFY
     UINT64 u64PruneVerifyTries[PRUNE_VERIFY_BANDS][SHIP_DEPTH_BUCKETS];
     UINT64 u64PruneVerifyFailHigh[PRUNE_VERIFY_BANDS][SHIP_DEPTH_BUCKETS];
@@ -3735,7 +3756,8 @@ TryNullmovePruning(IN OUT SEARCHER_THREAD_CONTEXT *ctx,
                    IN SCORE iBeta,
                    IN ULONG uNullDepth,
                    IN OUT INT *piOrigExtend,
-                   OUT SCORE *piNullScore);
+                   OUT SCORE *piNullScore,
+                   IN ULONG uNullRBucket);
 
 void
 UpdatePV(SEARCHER_THREAD_CONTEXT *ctx, MOVE mv);