Closed Nickleaton closed 2 years ago
http://wscwpc2018.cz/wp-content/uploads/2018/10/WSC_2018_instruction_booklet_v5.pdf
4) Quadro Rules: Follow classic sudoku rules. There must be at least one even and at least one odd digit in every 2×2 adjacent cells
http://wscwpc2018.cz/wp-content/uploads/2018/10/WSC_2018_instruction_booklet_v5.pdf
4) Quadro Rules: Follow classic sudoku rules. There must be at least one even and at least one odd digit in every 2×2 adjacent cells