add GAMESIZE (attention: **WRONG**, as for repeat only !)

Makefile

@@ -11,9 +11,9 @@
 #
 
 SHELL     := /bin/bash
-CC        := gcc
+#CC        := gcc
+CC        := gcc-13
 #CC        := clang
-LD        := ld
 BEAR      := bear
 TOUCH     := touch
 RM        := rm

src/chessdefs.h

@@ -21,6 +21,7 @@
 #define BIT(i)             ( (u64) (ONE << (i)) )
 
 #define BOARDSIZE          (8*8)
+#define GAMESIZE           1024                   /* max game size (512 moves) */
 
 /**
  * sq_rel - get relative square

src/eval.h

@@ -1,6 +1,6 @@
 /* eval.h - static position evaluation.
  *
- * Copyright (C) 2021 Bruno Raoult ("br")
+ * Copyright (C) 2021-2024 Bruno Raoult ("br")
  * Licensed under the GNU General Public License v3.0 or later.
  * Some rights reserved. See COPYING.
  *

src/position.c

@@ -123,7 +123,8 @@ pos_t *pos_clear(pos_t *pos)
     pos->pinners = 0;
     pos->blockers = 0;
 
-    //pos->moves.nmoves = 0;
+    pos->repeat.moves = 0;
+
     return pos;
 }
 
@@ -131,9 +132,11 @@ pos_t *pos_clear(pos_t *pos)
  * pos_cmp() - compare two positions..
  * @pos1, @pos2: The two &position.
  *
+ * Used only for move_{do,undo} test/debug.
+ *
  * @return: true if equal, false otherwise.
  */
-bool pos_cmp(__unused const pos_t *pos1, __unused const pos_t *pos2)
+bool pos_cmp(const pos_t *pos1, const pos_t *pos2)
 {
 #define _cmpf(a) (pos1->a != pos2->a)
     bool ret = false;
@@ -142,8 +145,11 @@ bool pos_cmp(__unused const pos_t *pos1, __unused const pos_t *pos2)
         goto end;
 
     /* move_do/undo position state */
-    if (_cmpf(en_passant) || _cmpf(castle) ||
+    if (_cmpf(key) || _cmpf(en_passant) || _cmpf(castle) ||
-        _cmpf(clock_50) || _cmpf(plycount))
+        _cmpf(clock_50) || _cmpf(plycount) || _cmpf(captured))
+        goto end;
+
+    if (_cmpf(checkers) || _cmpf(pinners) || _cmpf(blockers))
         goto end;
 
     for (square_t sq = A1; sq <= H8; ++sq)
@@ -151,7 +157,7 @@ bool pos_cmp(__unused const pos_t *pos1, __unused const pos_t *pos2)
             goto end;
 
     for (color_t color = WHITE; color <= BLACK; ++color) {
-        for (piece_type_t piece = 0; piece <= KING; ++piece)
+        for (piece_type_t piece = ALL_PIECES; piece <= KING; ++piece)
             if (_cmpf(bb[color][piece]))
                 goto end;
         if (_cmpf(king[color]))
@@ -161,6 +167,11 @@ bool pos_cmp(__unused const pos_t *pos1, __unused const pos_t *pos2)
     if (_cmpf(checkers) ||_cmpf(pinners) || _cmpf(blockers))
         goto end;
 
+    if (_cmpf(repeat.moves) ||
+        memcmp(pos1->repeat.key, pos2->repeat.key,
+               pos1->repeat.moves * sizeof pos1->repeat.key))
+        goto end;
+
     ret = true;
 end:
     return ret;

test/perft-test.c

@@ -44,6 +44,9 @@ static FILE *open_stockfish()
     int rpipe[2], wpipe[2];
     FILE *out_desc;
     pid_t pid;
+    char *buf = NULL;
+    size_t alloc = 0;
+    ssize_t buflen;
 
     if ((pipe(rpipe) < 0) || (pipe(wpipe) < 0)) {
         perror("pipe");
@@ -84,11 +87,36 @@ static FILE *open_stockfish()
     out_desc = fdopen(wpipe[WR], "w");
     setvbuf(out_desc, NULL, _IOLBF, 0);
 
+    fprintf(out_desc, "uci\n");
+    while (true) {
+        if ((buflen = getline(&buf, &alloc, stdin)) < 0) {
+            perror("getline");
+            exit(1);
+        }
+        if (!strncmp(buf, "uciok", 5))
+            break;
+    }
+    free(buf);
     return out_desc;
 }
 
-static u64 send_stockfish_fen(FILE *desc, pos_t *pos, movelist_t *movelist,
+static void stockfish_fen(FILE *desc, char *fen)
-                               char *fen, int depth)
+{
+    char *buf = NULL;
+    size_t alloc = 0;
+    ssize_t buflen;
+
+    fprintf(desc, "ucinewgame\nisready\n");
+    while ((buflen = getline(&buf, &alloc, stdin)) > 0) {
+        if (!strncmp(buf, "readyok", 7))
+            break;
+    }
+    fprintf(desc, "position fen %s\n", fen);
+    free(buf);
+}
+
+static u64 stockfish_perft(FILE *desc, pos_t *pos, movelist_t *movelist,
+                               int depth)
 {
     char *buf = NULL;
     u64 count, mycount = 0, fishcount;
@@ -102,10 +130,11 @@ static u64 send_stockfish_fen(FILE *desc, pos_t *pos, movelist_t *movelist,
     *nmoves = 0;
     //char nodescount[] = "Nodes searched";
     //printf("nmoves = %d\n", nmoves);
-    fflush(stdout);
+    //fflush(stdout);
     //sprintf(str, "stockfish \"position fen %s\ngo perft depth\n\"", fen);
-    fprintf(desc, "position fen %s\ngo perft %d\n", fen, depth);
+    //fprintf(desc, "position fen %s\ngo perft %d\n", fen, depth);
     //fflush(desc);
+    fprintf(desc, "go perft %d\n", depth);
 
     while ((buflen = getline(&buf, &alloc, stdin)) > 0) {
         buf[--buflen] = 0;
@@ -293,8 +322,9 @@ int main(int ac, char**av)
         }
         pos = fenpos;
         if (sf_run) {
+            stockfish_fen(outfd, fen);
             clock_start(&clock);
-            sf_count = send_stockfish_fen(outfd, fishpos, &fishmoves, fen, depth);
+            sf_count = stockfish_perft(outfd, fishpos, &fishmoves, depth);
             ms = clock_elapsed_ms(&clock);
             if (!ms) {
                 res[2].skipped++;