diff --git a/src/position.h-move-to-temp-migration-bitboard__position.h b/src/position.h-move-to-temp-migration-bitboard__position.h
new file mode 100644
index 0000000..d41a0db
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+++ b/src/position.h-move-to-temp-migration-bitboard__position.h
@@ -0,0 +1,66 @@
+/* position.h - position management definitions.
+ *
+ * Copyright (C) 2021 Bruno Raoult ("br")
+ * Licensed under the GNU General Public License v3.0 or later.
+ * Some rights reserved. See COPYING.
+ *
+ * You should have received a copy of the GNU General Public License along with this
+ * program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
+ *
+ */
+
+#ifndef POSITION_H
+#define POSITION_H
+
+#include <stdint.h>
+
+#include "pool.h"
+#include "list.h"
+#include "bitops.h"
+
+#include "board.h"
+#include "chessdefs.h"
+
+typedef struct pos_s {
+    u64 node_count;                               /* evaluated nodes */
+    piece_t turn;                                 /* we use only color bit */
+    castle_t castle;
+    u16 clock_50;
+    u16 curmove;
+    eval_t eval;
+    int check[2];
+    int eval_simple_phase;
+    eval_t eval_simple;
+    move_t *bestmove;
+    bool moves_generated;
+    bool moves_counted;
+    board_t board[BOARDSIZE];
+
+    square_t en_passant;
+
+    bitboard_t bb[2][BB_END];                     /* use: pieces[BLACK][BB_PAWN] */
+    bitboard_t occupied[2];                       /* OR of bb[COLOR][x] */
+    bitboard_t controlled[2];
+    u16 mobility[2];
+    struct list_head pieces[2];                   /* pieces list, King is first */
+    struct list_head moves[2];
+} pos_t;
+
+void bitboard_print(bitboard_t bb);
+void bitboard_print2(bitboard_t bb1, bitboard_t bb2);
+void pos_pieces_print(pos_t *pos);
+void pos_bitboards_print(pos_t *pos);
+void pos_print(pos_t *pos);
+pos_t *pos_clear(pos_t *pos);
+void pos_del(pos_t *pos);
+pos_t *pos_startpos(pos_t *pos);
+pos_t *pos_create();
+pool_t *pos_pool_init();
+void pos_pool_stats();
+pos_t *pos_get();
+pos_t *pos_dup(pos_t *pos);
+void pos_check(pos_t *pos);
+
+#endif  /* POSITION_H */