Puzzle Description:

The Union Jack with the red Welsh Dragon at its center.

#1: Wombat (wombatilim) on Mar 12, 2024 [HINT]

Initial line & color logic solves 88% with only red remaining.

C1: If R3 is red, R1 is invalid. LL.

The same step can be rotated around for each corner: R20C3, R10C20, and R1C18 each need to be white to avoid a contradiction.

LL to finish.

Found to be solvable with moderate lookahead by wombatilim.

Goto next topic

You must register and log in to be able to participate in this discussion.