#define ROW_NAME(n) ('a' + NO_ROWS - 1 - n)
#define COL_NAME(n) ('1' + NO_COLS - 1 - n)
+#define ROW_NUM(c) ('a' + NO_ROWS - 1 - c)
+#define COL_NUM(c) ('1' + NO_COLS - 1 - c)
#if defined HASHFILE || defined CACHE
# define PTBLBDSIZE (NO_SQUARES + NO_PIECES)