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簡單但具有挑戰性的個人益智遊戲！

Starting with an 8x8 grid (typical chess or checker board), click squares to turn them blue. The goal is to get 8 blue squares with no 2 occupying any same row, column OR diagonal! Sounds simple and easy, but solving it can be quite challenging! Totally free to use with no ads. Feel free to comment toward future updates.