diff options
| -rw-r--r-- | signpost.c | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -1578,6 +1578,8 @@ static game_state *execute_move(const game_state *state, const char *move) si = sy*w+sx; ei = ey*w+ex; makelink(ret, si, ei); } else if (sscanf(move, "%c%d,%d", &c, &sx, &sy) == 3) { + int sset; + if (c != 'C' && c != 'X') return NULL; if (!INGRID(state, sx, sy)) return NULL; si = sy*w+sx; @@ -1586,11 +1588,12 @@ static game_state *execute_move(const game_state *state, const char *move) ret = dup_game(state); - if (c == 'C') { + sset = state->nums[si] / (state->n+1); + if (c == 'C' || (c == 'X' && sset == 0)) { /* Unlink the single cell we dragged from the board. */ unlink_cell(ret, si); } else { - int i, set, sset = state->nums[si] / (state->n+1); + int i, set; for (i = 0; i < state->n; i++) { /* Unlink all cells in the same set as the one we dragged * from the board. */ |