I mostly used a computer to solve. A random brute force process. I added as much logic as I could determine from the hint and reduced which tiles could be placed in the surrounding cells (3x3 form the corners). I started the process from cell A7 and followed the blue arrow up where I determined cell A6 only had two that could fit, thus reducing the number of random incorrect choices greatly. From there the process followed the blue arrows placing a random tile after filtering out the tiles that logically didn't fit. Solution: >! ![enter image description here][1] Solution Text Look: >! ![enter image description here][2] [1]: https://i.sstatic.net/aKbon.png [2]: https://i.sstatic.net/DEYAn.png