规则Rules：
标准数独基础上，转轮所穿过的格子内的数字必须按照提示的顺序填在格子内。转轮可以旋转90°、180°或者270°（不能翻转）。
Classic rules applied. Additionally, the digits on the circles have to be placed in the same circular order in the four cells that are touched by the circle. The circles may have to be rotated to the correct position by 90, 180 or 270 degrees.
