Apply classic Sudoku rules. Each capsule contains one odd number and one even number.

遵循标准数独规则，每个胶囊里面有一个奇数和一个偶数。

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Apply classic Sudoku rules. Digit (s) on each arrow must be between two digits pointed by the arrow.

遵循标准数独规则，在箭头中间的数字的大小需在箭头顶端两个数值之间。

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Apply classic Sudoku rules. Each circled number denotes the difference of maximum digit and minimum digit in its neighboring 4 cells. Digits can repeat around each circle.

遵循标准数独规则，在四格中间的数字表示四格中最大数和最小数的差值，这四个数字是可以重复的。

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