Copie figée du cœur de GNU Backgammon (commit 14b6798)

Fichiers repris sans modification dans engine/gnubg/, poids et table
d'équité Kazaross-XG2 dans engine/data/, provenance détaillée dans
engine/gnubg/PROVENANCE.md. Le lint ne vérifie plus les espaces de ces
copies, pour qu'elles restent identiques à l'original.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

engine/gnubg/bearoffgammon.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2000-2002 Joseph Heled <joseph@gnubg.org>
+ * Copyright (C) 2006-2008 the AUTHORS
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * $Id: bearoffgammon.h,v 1.12 2018/06/16 14:54:30 plm Exp $
+ */
+
+#if !defined( BEAROFFGAMMON_H )
+#define BEAROFFGAMMON_H
+
+/* pack for space */
+struct GammonProbs {
+    unsigned int p1:16;         /* 0 - 36^2 */
+    unsigned int p2:16;         /* 0 - 36^3 */
+    unsigned int p3:24;         /* 0 - 36^4 */
+    unsigned int p0:8;          /* 0 - 36   */
+};
+
+extern struct GammonProbs *getBearoffGammonProbs(const unsigned int board[6]);
+
+extern long *getRaceBGprobs(const unsigned int board[6]);
+
+#define RBG_NPROBS 5
+
+#endif