Shimaguni

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.

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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.

Complete guide

Rules, scoring, and strategy

Shimaguni uses the independently implemented Shimaguni room shade counts distinct adjacency rules v1 profile (R646). Shimaguni changes familiar play through a specific constraint: 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.

Setup and opening 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.

Legal moves and game flow

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.

Winning and terminal positions

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. 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.

Practical strategy

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.

Questions players ask

How does play in Shimaguni change when players account for different shade totals in adjacent rooms?

Complete the clued connected shade group inside each room while comparing its total with every adjacent room before placing a border-touching shade. This matters specifically because 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.

Why can a locally legal-looking plan fail in Shimaguni?

Allowing shade to touch across a room border or matching adjacent room totals breaks Shimaguni even when each room alone has the right count. Recheck the legal boundary before choosing a replacement move.

Which obligations must all agree at the end of Shimaguni?

Success in Shimaguni requires that every cell, edge, region, and fixed clue satisfies the room shade counts distinct adjacency completion test. The game declares completion only after all interacting restrictions agree at the same time. Undo and redo expose alternative branches without revealing an authored answer.