The numbers 1 to 9 are to appear once in every row, column, long diagonal, 3x3 grid and irregular shape. Light cells are odd; darker cells are even. From the starters given, can you finish the puzzle?
The required completed arrangement is as follows:
3...1...9...6...4...7...8...5...2
8...7...6...3...5...2...9...4...1
5...4...2...8...1...9...3...7...6
9...5...3...1...2...6...7...8...4
7...2...1...4...8...3...6...9...5
4...6...8...7...9...5...2...1...3
6...3...5...9...7...1...4...2...8
2...9...4...5...3...8...1...6...7
1...8...7...2...6...4...5...3...9
answer
