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#1: Web Paint-By-Number Robot (webpbn) on Apr 10, 2022

Found to be solvable with moderate lookahead by blurglecruncheon.

I found two places that needed lookahead: the bottom 8x4 corner and R6-10 C7-22.

For the lower right there are lots of ways to do things, but note R27/28 must both have green dots in C33/35 or else you would have 1/2 in one row and 2 in the next, this making a 2 in some column.

For the upper bit you can work on row 6 with edge logic and some 2-way logic, or you can work on column 7. If a green is in C7R6, then wherever you place the 2 in C10 puts a 2 in C11. Otherwise, you get 2-way logic or zigzag lines that run into the edge of the remaining unfilled square.

All this maths hurts my head!

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Wow.

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