Puzzle Description:

Surfer in action

#1: Eric (kelalatir) on Nov 20, 2021 [HINT]

I found this puzzle to require deep look-ahead. Color logic gets all colors solved except black. After using line and color logic, end logic can eliminate some squares in the top right. Then deep look-ahead kept me going. In column one, there were only 3 locations where the block 2 might go. Within 3 moves, I was able to eliminate 2 of the 3 locations through a contradiction in column 4. After that one deep look-ahead moment, and some additional two-way logic and edge logic, I was able to finish the rest of the puzzle.

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