Mmm, Battenberg. Who doesn’t love a bit of colorful sponge cake? I know I do!
This puzzle is marzipan-free for good health.
Rules:
Normal Sudoku rules apply.
Battenberg squares mark every 2x2 area in which odd and even digits form a checkerboard pattern.
In cells separated by a white dot, the digits are consecutive. In cells separated by a black dot, one digit is double the other. Not all dots are given.
Estimated difficulty: 1 out of 5
Solve on SudokuPad