# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1786962128 -7200
# Node ID 18dbb0dc9cd6aec26694b4d682315293e67389c4
# Parent  ef8c39362342b9d0c903d986a4aada1b647d7284
fix FEN being off by one

diff -r ef8c39362342 -r 18dbb0dc9cd6 src/chess/rules.c
--- a/src/chess/rules.c	Mon Aug 17 12:14:51 2026 +0200
+++ b/src/chess/rules.c	Mon Aug 17 12:22:08 2026 +0200
@@ -397,11 +397,6 @@
     Move *melem = &gamestate->moves[gamestate->movecount];
     *melem = *move;
 
-    /* calculate the FEN and store it in the FEN array */
-    char fen[FEN_MAX_LENGTH];
-    fen_compute(fen, gamestate);
-    gamestate->fen[gamestate->movecount] = strdup(fen);
-
     /* only if move has no time info, compute it */
     if (melem->movetime.tv_sec == 0 && melem->movetime.tv_usec == 0) {
         calc_movetime(gamestate, melem);
@@ -409,6 +404,11 @@
 
     /* important: only "add" the move after calculating the time! */
     gamestate->movecount++;
+
+    /* calculate the FEN of the new position and store it in the FEN array */
+    char fen[FEN_MAX_LENGTH];
+    fen_compute(fen, gamestate);
+    gamestate->fen[gamestate->movecount - 1] = strdup(fen);
 }
 
 void apply_move(GameState *gamestate, Move *move) {