Shugaku

The winning condition for Shugaku is precise: every cell, edge, region, and fixed clue satisfies the futon pillow aisle connectivity 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 Shugaku is precise: every cell, edge, region, and fixed clue satisfies the futon pillow aisle connectivity completion test. No hidden solution values are printed to justify the result; the rules engine validates the submitted position.

  • Before the first move in Shugaku, identify which marks are givens and which controls are decisions. Place nonoverlapping two-cell futons with one pillow each, leaving one connected aisle that contains no two-by-two block. 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. Place nonoverlapping two-cell futons with one pillow each, leaving one connected aisle that contains no two-by-two block. The runtime validates the resulting state before it records a move or opens a new undo branch.
  • The winning condition for Shugaku is precise: every cell, edge, region, and fixed clue satisfies the futon pillow aisle connectivity completion test. No hidden solution values are printed to justify the result; the rules engine validates the submitted position.

Strategy tips

  • Pair each pillow with one orthogonal futon cell, then test the remaining aisle for connectivity and scan every two-by-two window before fixing another bed.
  • A valid set of two-cell futons can still wall off an aisle pocket or leave a two-by-two aisle block, so furniture placement alone is not enough.
  • 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 futon pillow aisle connectivity completion test. A locally attractive move can still break a distant constraint.

Complete guide

Rules, scoring, and strategy

Shugaku uses the independently implemented Shugaku futon pillow aisle connectivity rules v1 profile (R670). Shugaku changes familiar play through a specific constraint: Place nonoverlapping two-cell futons with one pillow each, leaving one connected aisle that contains no two-by-two block.

Setup and opening position

Before the first move in Shugaku, identify which marks are givens and which controls are decisions. Place nonoverlapping two-cell futons with one pillow each, leaving one connected aisle that contains no two-by-two block. 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. Place nonoverlapping two-cell futons with one pillow each, leaving one connected aisle that contains no two-by-two block. 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 Shugaku is precise: every cell, edge, region, and fixed clue satisfies the futon pillow aisle connectivity 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 futon pillow aisle connectivity completion test. A locally attractive move can still break a distant constraint.

Practical strategy

Pair each pillow with one orthogonal futon cell, then test the remaining aisle for connectivity and scan every two-by-two window before fixing another bed. A valid set of two-cell futons can still wall off an aisle pocket or leave a two-by-two aisle block, so furniture placement alone is not enough.

Questions players ask

How does play in Shugaku change when players account for pillow futons preserving one aisle?

Pair each pillow with one orthogonal futon cell, then test the remaining aisle for connectivity and scan every two-by-two window before fixing another bed. This matters specifically because place nonoverlapping two-cell futons with one pillow each, leaving one connected aisle that contains no two-by-two block.

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

A valid set of two-cell futons can still wall off an aisle pocket or leave a two-by-two aisle block, so furniture placement alone is not enough. Recheck the legal boundary before choosing a replacement move.

Which obligations must all agree at the end of Shugaku?

Success in Shugaku requires that every cell, edge, region, and fixed clue satisfies the futon pillow aisle connectivity 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.