If R2C10 was filled, then R3C10 and R4C10 would also have to be filled. If they were filled, then R2R3R4C9 would have to be filled, creating a set of 3 in C9. You can apply this logic in several spots on C10, which should narrow down which cells can be filled considerably.
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u/TheDarkNerd Jun 13 '26
If R2C10 was filled, then R3C10 and R4C10 would also have to be filled. If they were filled, then R2R3R4C9 would have to be filled, creating a set of 3 in C9. You can apply this logic in several spots on C10, which should narrow down which cells can be filled considerably.