How to play
The winning condition for Shimaguni is precise: every cell, edge, region, and fixed clue satisfies the room shade counts distinct adjacency completion test. No hidden solution values are printed to justify the result; the rules engine validates the submitted position.
- Before the first move in Shimaguni, identify which marks are givens and which controls are decisions. Each room has one connected shaded group of the clued size; shaded groups cannot touch across a border, and adjacent rooms use different shaded counts. The browser stores that distinction with the seeded opening so a restart never changes the puzzle or deal.
- Use the live board controls to change one legal decision at a time. Each room has one connected shaded group of the clued size; shaded groups cannot touch across a border, and adjacent rooms use different shaded counts. The runtime validates the resulting state before it records a move or opens a new undo branch.
- The winning condition for Shimaguni is precise: every cell, edge, region, and fixed clue satisfies the room shade counts distinct adjacency completion test. No hidden solution values are printed to justify the result; the rules engine validates the submitted position.
Strategy tips
- Complete the clued connected shade group inside each room while comparing its total with every adjacent room before placing a border-touching shade.
- Allowing shade to touch across a room border or matching adjacent room totals breaks Shimaguni even when each room alone has the right count.
- Use undo to compare the last branch if two completions look plausible, then recheck the exact requirement: every cell, edge, region, and fixed clue satisfies the room shade counts distinct adjacency completion test. A locally attractive move can still break a distant constraint.