1. Each block has two states, the free state (white squares) and the occupied state (color squares). 2. The initial state is free. When the box is clicked, the current state of the box changes to the opposite state, ie, discoloration.
3. At the same time, the state of the block adjacent to the block (excluding the blocks adjacent to the diagonal) will also change, and the game will end when all the blocks have become occupied.
4. Try to challenge more levels of game difficulty.