tactics.h

   1 #ifndef ZZGO_TACTICS_H
   2 #define ZZGO_TACTICS_H
   3
   4 /* Advanced tactical checks non-essential to the board implementation. */
   5
   6 #include "board.h"
   7
   8 /* Check if this move is undesirable self-atari (resulting group would have
   9  * only single liberty and not capture anything; ko is allowed); we mostly
  10  * want to avoid these moves. The function actually does a rather elaborate
  11  * tactical check, allowing self-atari moves that are nakade, eye falsification
  12  * or throw-ins. */
  13 static bool is_bad_selfatari(struct board *b, enum stone color, coord_t to);
  14
  15
  16 bool is_bad_selfatari_slow(struct board *b, enum stone color, coord_t to);
  17 static inline bool
  18 is_bad_selfatari(struct board *b, enum stone color, coord_t to)
  19 {
  20         /* More than one immediate liberty, thumbs up! */
  21         if (immediate_liberty_count(b, to) > 1)
  22                 return false;
  23
  24         return is_bad_selfatari_slow(b, color, to);
  25 }
  26
  27 #endif