@27 : While adding certain offsets to a from square, to det…
@27 : While adding certain offsets to a from square, to determine a destination square - a cheap 'and' by 0x88 is appropriate for an 'off the board' test:
@27 : While adding certain offsets to a from square, to determine a destination square - a cheap 'and' by 0x88 is appropriate for an 'off the board' test: