Bench: 5436643

src/eval.c

@@ -30,13 +30,6 @@
 const int PHASE_VALUES[6] = {0, 3, 3, 5, 10, 0};
 const int MAX_PHASE       = 64;
 
-void SetContempt(int* dest, int stm) {
-  int contempt = CONTEMPT;
-
-  dest[stm]     = contempt;
-  dest[stm ^ 1] = -contempt;
-}
-
 // "Threats" logic to be utilized in search
 // idea originating in Koivisto
 void Threats(Threat* threats, Board* board, int stm) {
@@ -113,7 +106,6 @@ Score Evaluate(Board* board, ThreadData* thread) {
   Score knownEval = EvaluateKnownPositions(board);
   if (knownEval != UNKNOWN) return knownEval;
 
-  SearchData* data = &thread->data;
   int16_t* stm     = board->accumulators[board->stm][board->acc];
   int16_t* xstm    = board->accumulators[board->xstm][board->acc];
 
@@ -122,9 +114,6 @@ Score Evaluate(Board* board, ThreadData* thread) {
   // sf cornered bishop in FRC
   if (CHESS_960) score += FRCCorneredBishop(board);
 
-  // static contempt
-  score += data->contempt[board->stm];
-
   // scaled based on phase [1, 1.5]
   score = (128 + board->phase) * score / 128;
 

src/eval.h

@@ -24,7 +24,6 @@
 extern const int PHASE_VALUES[6];
 extern const int MAX_PHASE;
 
-void SetContempt(int* dest, int stm);
 void Threats(Threat* threats, Board* board, int stm);
 Score Evaluate(Board* board, ThreadData* thread);
 

src/makefile

@@ -12,7 +12,7 @@ DEFS     = -DVERSION=\"$(VERSION)\" -DEVALFILE=\"$(EVALFILE)\" -DNDEBUG
 # Flags
 STD    = -std=gnu11
 LIBS   = -pthread -lm
-WARN   = -Wall -Wextra -Wshadow -Werror
+WARN   = -Wall -Wextra -Wshadow
 
 FLAGS  = $(STD) $(WARN) -O3 -flto -g $(DEFS)
 CFLAGS = $(FLAGS) -march=native

src/search.c

@@ -137,9 +137,6 @@ void* Search(void* arg) {
   RefreshAccumulator(board->accumulators[WHITE][board->acc], board, WHITE);
   RefreshAccumulator(board->accumulators[BLACK][board->acc], board, BLACK);
 
-  data->contempt[WHITE] = data->contempt[BLACK] = 0;
-  SetContempt(data->contempt, board->stm);
-
   // set a hot exit point for this thread
   if (!setjmp(thread->exit)) {
     int searchStability = 0;

src/types.h

@@ -113,8 +113,6 @@ typedef struct {
 
   Move* moves;
 
-  int contempt[2];
-
   int de[MAX_SEARCH_PLY]; // double extensions
 
   Move skipMove[MAX_SEARCH_PLY];        // moves to skip during singular search

src/uci.c

@@ -42,7 +42,6 @@ int MOVE_OVERHEAD      = 300;
 int MULTI_PV           = 1;
 int PONDER_ENABLED     = 0;
 int CHESS_960          = 0;
-int CONTEMPT           = 12;
 volatile int PONDERING = 0;
 
 void RootMoves(SimpleMoveList* moves, Board* board) {
@@ -228,7 +227,6 @@ void PrintUCIOptions() {
   printf("option name Ponder type check default false\n");
   printf("option name UCI_Chess960 type check default false\n");
   printf("option name MoveOverhead type spin default 300 min 100 max 10000\n");
-  printf("option name Contempt type spin default 12 min -100 max 100\n");
   printf("option name EvalFile type string default <empty>\n");
   printf("uciok\n");
 }
@@ -387,8 +385,6 @@ void UCILoop() {
       ResetThreadPool(threads);
     } else if (!strncmp(in, "setoption name MoveOverhead value ", 34)) {
       MOVE_OVERHEAD = min(10000, max(100, GetOptionIntValue(in)));
-    } else if (!strncmp(in, "setoption name Contempt value ", 30)) {
-      CONTEMPT = min(100, max(-100, GetOptionIntValue(in)));
     } else if (!strncmp(in, "setoption name EvalFile value ", 30)) {
       char* path  = in + 30;
       int success = 0;

src/uci.h

@@ -20,7 +20,6 @@
 #include "types.h"
 
 extern int CHESS_960;
-extern int CONTEMPT;
 
 void RootMoves(SimpleMoveList* moves, Board* board);