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Lizely

Stitches Puzzle

Join every neighboring region pair exactly once while matching row and column endpoint clues without reusing a hole.

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How to use

  1. 1.Use the arrow keys to select one of the six borders, then press Space or Enter to place a stitch.
  2. 2.Join A to B exactly once and B to C exactly once; never reuse a cell as an endpoint.
  3. 3.Match row clues 2, 0, 2 and column clues 1, 2, 1; the clean two-stitch solution scores 900.

About Stitches Puzzle

Stitches Puzzle is a compact three by three version of the region-linking logic puzzle. The board contains three vertical regions named A, B, and C. A stitch crosses a shared border and joins one cell in each of two orthogonally neighboring regions. Your task is to place exactly one stitch between every neighboring region pair while matching all row and column endpoint clues.

The maintained Puzzle Stitches FAQ supplies the principal rule definition, and Puzzle Genius independently cross-checks the same region, hole, and clue constraints. The small board, its clue values, disclosed solution, keyboard controls, and score are Lizely product choices. This fixture exposes two neighboring pairs: A-B and B-C. It offers six candidate borders, one for each pair in each of the three rows.

Move the selected candidate with the arrow keys. Up and Down change rows; Left and Right change the region boundary. Press Space or Enter to place or remove the selected stitch. A stitch contributes two endpoints, one in each adjacent cell. The row clues are 2, 0, and 2 from top to bottom. The column clues are 1, 2, and 1 from left to right.

The disclosed solution places an A-B stitch across the top row and a B-C stitch across the bottom row. Those two moves join each neighboring region pair exactly once. They create two endpoints in the top row, none in the middle row, and two in the bottom row. Across columns, region A receives one endpoint, region B receives two, and region C receives one. A clean two-move solve scores 900 from a starting score of 1,000.

Validation runs after every placement. Two stitches may not use the same cell as a hole. A region pair may not receive more than one stitch. A row or column may not exceed its printed endpoint clue. An unknown border identifier is rejected by the independent logic layer. These contradictions are reported immediately, while underfilled clues remain playable because another legal stitch may still complete them.

The automated test fixture checks six unique candidate edges, orthogonal adjacency, cross-region endpoints, two distinct neighboring pairs, no shared hole, exact row clues, exact column clues, an invalid duplicate pair, and the full two-action keyboard completion simulation. It also asserts the final score, so rendering a success message without satisfying the puzzle cannot pass the gate.

The interface is an accessible CSS grid rather than a canvas. Each border button announces its row, region pair, placement state, and keyboard selection. Surfaces, borders, focus outlines, status colors, and text use the site's CSS variables. There is no random server, downloaded art, audio, timer, account requirement, hardware access, or pointer-only action.

Restart restores the empty board, first candidate, score, and contradiction state. A completed best score may be stored only in this browser's localStorage. Double-press Escape within the shared game-shell interval to show the simulated spreadsheet boss screen, then repeat the gesture to resume the unchanged puzzle. For more short deduction games, try Battleships, Thermometers, Heyawake, or Masyu.

Methodology & sources

The logic stores selected edge IDs from six predeclared orthogonal cross-region candidates. Analysis counts endpoint use by cell, exact stitches by neighboring region pair, and endpoint totals by row and column. Completion requires two selected edges, one for A-B and one for B-C, no shared cell, and exact clues. Score is max(0, 1000 − 50×placement actions).

Frequently asked questions

What does a row or column clue count?
It counts stitch endpoints, not whole stitches. Every placed stitch contributes one endpoint to each of its two cells.
Can two stitches share the same cell?
No. A cell represents one hole and may be used by at most one stitch.
How many stitches are required on this board?
Two: exactly one for the neighboring A-B pair and exactly one for the neighboring B-C pair.
Is the puzzle randomly generated?
No. It uses a disclosed three by three fixture so the rules and completion sequence are reproducible.

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