♔ Anti-King Sudoku

📖 How to play Anti-King Sudoku

1. The sudoku rules apply: 1 through 9 with no repeats in each row, column, and 3x3 box.
2. In addition, two squares that touch diagonally (a chess king's move) can't contain the same number.
3. Tap an empty square and choose the number. Each puzzle has a unique solution.

💡 Tip: when you place a number, none of the (up to 4) squares that touch it diagonally can repeat it. Use this to rule out options in neighboring boxes.