Normal sudoku rules apply. Grey lines are palindromes, reading the same each way. Black dots join digits with a 1:2 ratio; white dots join consecutive digits. Not all dots are shown. The grey circle is an odd digit.
Normal sudoku rules apply. Grey lines are palindromes, reading the same each way. Black dots join digits with a 1:2 ratio; white dots join consecutive digits. Not all dots are shown. The grey circle is an odd digit.