प्रोग्राम की सुविधाएँ · अवरुद्ध विकर्ण बोर्ड किरणें

def diagonal_rays(square, occupied):
    if type(square) is not int or not 0 <= square < 64 or type(occupied) is not int or not 0 <= occupied < 2**64:
        raise ValueError("rays.input")
    row, column = divmod(square, 8)
    result = 0
    for dr, dc in ((1, 1), (1, -1), (-1, 1), (-1, -1)):
        r, c = row+dr, column+dc
        while 0 <= r < 8 and 0 <= c < 8:
            bit = 1 << (8*r+c)
            result |= bit
            if occupied & bit:
                break
            r, c = r+dr, c+dc
    return result