From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Mon, 12 Mar 2012 11:18:33 +0000 (+0100)
Subject: Add option to resign only without queen
X-Git-Url: http://winboard.nl/cgi-bin?p=polyglot.git;a=commitdiff_plain;h=2deb3f708afc86aaa77ed5c334c39ea43cd3d828

Add option to resign only without queen
---

diff --git a/board.c b/board.c
index 4f1139f..5c8231a 100644
--- a/board.c
+++ b/board.c
@@ -270,6 +270,24 @@ bool board_equal(const board_t * board_1, const board_t * board_2) {
    return TRUE;
 }
 
+// board_has_queen()
+
+bool board_has_queen(const board_t * board, int colour) {
+
+   int sq_64, sq, piece;
+
+   ASSERT(board!=NULL);
+
+   for (sq_64 = 0; sq_64 < 64; sq_64++) {
+      sq = square_from_64(sq_64);
+      piece = board->square[sq];
+      if (colour_equal(piece,colour) && piece_is_queen(piece)) {
+         return TRUE;
+      }
+   }
+   return FALSE;
+}
+
 // board_init_list()
 
 void board_init_list(board_t * board) {
diff --git a/board.h b/board.h
index 00ec1c4..79208ce 100644
--- a/board.h
+++ b/board.h
@@ -49,6 +49,8 @@ extern void board_start        (board_t * board);
 extern void board_copy         (board_t * dst, const board_t * src);
 extern bool board_equal        (const board_t * board_1, const board_t * board_2);
 
+extern bool board_has_queen    (const board_t * board, int colour);
+
 extern void board_init_list    (board_t * board);
 
 extern int  board_flags        (const board_t * board);
diff --git a/option.c b/option.c
index 57935ad..e77c799 100644
--- a/option.c
+++ b/option.c
@@ -46,6 +46,7 @@ option_t DefaultOptions[] = {
 
     { "Resign",           "check","0","0",      "false"     , NULL,0,NNB,  PG|XBOARD|XBSEL}, 
     { "ResignMoves",      "spin","0","10000",    "3"        , NULL,0,NNB,  PG|XBOARD|XBSEL}, 
+    { "QueenNeverResigns","check","0","0",      "true"      , NULL,0,NNB,  PG|XBOARD|XBSEL}, 
     { "ResignScore",      "spin","0","10000",   "600"       , NULL,0,NNB,  PG|XBOARD|XBSEL}, 
 
     { "MateScore",        "spin","0","100000",  "10000"     , NULL,0,NNB,  PG|XBOARD}, 
diff --git a/xboard2uci.c b/xboard2uci.c
index fcc1812..00d582b 100644
--- a/xboard2uci.c
+++ b/xboard2uci.c
@@ -1014,8 +1014,10 @@ static void comp_move(int move) {
          my_log("POLYGLOT %d move%s with resign score\n",State->resign_nb,(State->resign_nb>1)?"s":"");
 
          if (State->resign_nb >= option_get_int(Option,"ResignMoves")) {
-            my_log("POLYGLOT *** RESIGN ***\n");
-            gui_send(GUI,"resign");
+	    if (!option_get_bool(Option,"QueenNeverResigns") || !board_has_queen(board, board->turn)) { // [HGM] suppress resignig with Queen
+                my_log("POLYGLOT *** RESIGN ***\n");
+                gui_send(GUI,"resign");
+	    }
          }
 
       } else {