tactics/selfatari.h

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