The third obscure genre we showcased in the LPO is another Naoki Inaba type called "Triomino Divide". Actually, I'm slightly lying here; its original name was "○△× Division". We changed the symbols to match those of Voxas, which meant the original name no longer applied. During the contest we gave it the name "Triomino Voxas", but it seems as if the genre was called "Triomino Divide" in an older WPC, so that's the name I'm going with here.
Rules: Divide the grid into triominos. Given edges must separate two distinct triominos. If an edge contains a circle, the two triominos touching the edge must relate in the following way:
- A white circle indicates that the two triominos bordering the clue must have the same shape and orientation.
- A gray circle indicates that the two triominos bordering the clue must have the same shape, but not the same orientation.
- A black circle indicates that the two triominos have different shapes.
Both puzzles below were from the LPO. The first one is on the easier side with an antisymmetric theme.
The second puzzle requires more careful analysis of the possible triominos touching each pair of circles.
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