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Puzzle#55: Extra Region Sudoku

Puzzle#54: Extra Region Suodku

Puzzle#53:Odd Even Sudoku

Puzzle#52: Thermo Sudoku

Puzzle#51: Arrow Sudoku

Puzzle#50: Consecutive Pairs

Puzzle#49: Meandering Diagonals

Puzzle#48:Untouch Sudoku

Puzzle#47: Outside Sudoku

Puzzle#46: Antiknight Sudoku

Puzzle#45: Irregular Sudoku

Puzzle#44: Irregular Sudoku

Puzzle#43: Renban Sudoku