Kouchoku

Success in Kouchoku requires that every cell, edge, region, and fixed clue satisfies the letter segment right angle loop completion test. The game declares completion only after all interacting restrictions agree at the same time.

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How to play

Success in Kouchoku requires that every cell, edge, region, and fixed clue satisfies the letter segment right angle loop completion test. The game declares completion only after all interacting restrictions agree at the same time.

  • The Kouchoku opening separates permanent constraints from player-controlled positions. Join the clue points with straight segments into one nonbranching loop; matching letters must be consecutive, different letters cannot connect directly, and intersections are right angles. Its versioned seed recreates those same constraints locally while keeping unrevealed decisions out of the guide and board labels.
  • Kouchoku treats the printed or dealt restrictions as hard constraints, not suggestions. Join the clue points with straight segments into one nonbranching loop; matching letters must be consecutive, different letters cannot connect directly, and intersections are right angles. A move that contradicts the current state has no effect, including after the game has ended.
  • Success in Kouchoku requires that every cell, edge, region, and fixed clue satisfies the letter segment right angle loop completion test. The game declares completion only after all interacting restrictions agree at the same time.

Strategy tips

  • Pair matching letters through candidate consecutive loop segments and reserve intersection points where both traversals can meet strictly at right angles.
  • Letting segments cross obliquely or connect at the crossing changes the loop graph; every intersection must preserve the required right-angle passage.
  • Close Kouchoku by auditing the boundary cases first and the obvious placements second. The position is not done until every cell, edge, region, and fixed clue satisfies the letter segment right angle loop completion test.

Complete guide

Rules, scoring, and strategy

Kouchoku uses the independently implemented Kouchoku letter segment right angle loop rules v1 profile (R651). The defining decisions in Kouchoku come from this rules combination: Join the clue points with straight segments into one nonbranching loop; matching letters must be consecutive, different letters cannot connect directly, and intersections are right angles.

Setup and opening position

The Kouchoku opening separates permanent constraints from player-controlled positions. Join the clue points with straight segments into one nonbranching loop; matching letters must be consecutive, different letters cannot connect directly, and intersections are right angles. Its versioned seed recreates those same constraints locally while keeping unrevealed decisions out of the guide and board labels.

Legal moves and game flow

Kouchoku treats the printed or dealt restrictions as hard constraints, not suggestions. Join the clue points with straight segments into one nonbranching loop; matching letters must be consecutive, different letters cannot connect directly, and intersections are right angles. A move that contradicts the current state has no effect, including after the game has ended.

Winning and terminal positions

Success in Kouchoku requires that every cell, edge, region, and fixed clue satisfies the letter segment right angle loop completion test. The game declares completion only after all interacting restrictions agree at the same time. Close Kouchoku by auditing the boundary cases first and the obvious placements second. The position is not done until every cell, edge, region, and fixed clue satisfies the letter segment right angle loop completion test.

Practical strategy

Pair matching letters through candidate consecutive loop segments and reserve intersection points where both traversals can meet strictly at right angles. Letting segments cross obliquely or connect at the crossing changes the loop graph; every intersection must preserve the required right-angle passage.

Questions players ask

Which decisions in Kouchoku depend on letter pairing and right-angle crossings?

Pair matching letters through candidate consecutive loop segments and reserve intersection points where both traversals can meet strictly at right angles. This matters specifically because join the clue points with straight segments into one nonbranching loop; matching letters must be consecutive, different letters cannot connect directly, and intersections are right angles.

What boundary should be rechecked after a mistake in Kouchoku?

Letting segments cross obliquely or connect at the crossing changes the loop graph; every intersection must preserve the required right-angle passage. Recheck the legal boundary before choosing a replacement move.

When does the runtime award completion in Kouchoku?

Finish Kouchoku when every cell, edge, region, and fixed clue satisfies the letter segment right angle loop completion test. Completion is checked from the entire position, not from a displayed answer or a visual approximation. Undo and redo expose alternative branches without revealing an authored answer.