Revert previous patch

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 8f46d82a5ed856abb0d68a847e7f2e97afa92e49..220fff5e10d03e50e74e4052c2f3c9f97bbfd380 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -581,7 +581,10 @@ namespace {
 
     // Step 5. Evaluate the position statically and update parent's gain statistics
     if (inCheck)
+    {
         ss->staticEval = ss->evalMargin = eval = VALUE_NONE;
+        goto iid_start;
+    }
 
     else if (tte)
     {
@@ -618,7 +621,6 @@ namespace {
     // Step 6. Razoring (is omitted in PV nodes)
     if (   !PvNode
         &&  depth < 4 * ONE_PLY
-        && !inCheck
         &&  eval + razor_margin(depth) < beta
         &&  ttMove == MOVE_NONE
         &&  abs(beta) < VALUE_MATE_IN_MAX_PLY
@@ -638,7 +640,6 @@ namespace {
     if (   !PvNode
         && !ss->skipNullMove
         &&  depth < 4 * ONE_PLY
-        && !inCheck
         &&  eval - futility_margin(depth, (ss-1)->futilityMoveCount) >= beta
         &&  abs(beta) < VALUE_MATE_IN_MAX_PLY
         &&  abs(eval) < VALUE_KNOWN_WIN
@@ -649,7 +650,6 @@ namespace {
     if (   !PvNode
         && !ss->skipNullMove
         &&  depth > ONE_PLY
-        && !inCheck
         &&  eval >= beta
         &&  abs(beta) < VALUE_MATE_IN_MAX_PLY
         &&  pos.non_pawn_material(pos.side_to_move()))
@@ -711,7 +711,6 @@ namespace {
     // prune the previous move.
     if (   !PvNode
         &&  depth >= 5 * ONE_PLY
-        && !inCheck
         && !ss->skipNullMove
         &&  abs(beta) < VALUE_MATE_IN_MAX_PLY)
     {
@@ -737,6 +736,8 @@ namespace {
             }
     }
 
+iid_start: // When in check we skip early cut tests
+
     // Step 10. Internal iterative deepening
     if (   depth >= (PvNode ? 5 * ONE_PLY : 8 * ONE_PLY)
         && ttMove == MOVE_NONE
@@ -811,12 +812,7 @@ split_point_start: // At split points actual search starts from here
       givesCheck = pos.move_gives_check(move, ci);
       dangerous =   givesCheck
                  || pos.is_passed_pawn_push(move)
-                 || type_of(move) == CASTLE
-                 || (   captureOrPromotion // Entering a pawn endgame?
-                     && type_of(pos.piece_on(to_sq(move))) != PAWN
-                     && type_of(move) == NORMAL
-                     && (  pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK)
-                         - PieceValue[MG][pos.piece_on(to_sq(move))] == VALUE_ZERO));
+                 || type_of(move) == CASTLE;
 
       // Step 12. Extend checks and, in PV nodes, also dangerous moves
       if (PvNode && dangerous)