规则Rules：
标准数独基础上，黑点两侧数字为2倍关系，白点两侧数字之差为1。所有符合条件的地方都被点标记，1和2之间可能是任意一种标记。
Classic rules applied. Additionally, a black dot means that one of the neighboring digits has the double value of the other digit. A white dot means that the difference of the neighboring digits is exactly one. If there is no dot between two cells none of the constraints is valid. Dots between 1 and 2 will be white or black.
