[crossword-basic] Crossword Puzzle Grid

[MarkusNeusinger]

Description

A crossword puzzle grid with white entry cells, black blocking cells, and numbered starting positions for across and down words.

Applications

• Printable crossword puzzles
• Educational vocabulary exercises
• Newspaper-style puzzles
• Language learning tools

Data

• Grid pattern (which cells are blocked)
• Word positions and directions
• Clue numbers for word starts
• Size: 10x10 to 15x15 typical

Notes

• White cells for letters, black cells for blocks
• Numbers in top-left corner of word starts
• Symmetric black cell pattern (traditional style)
• Clean grid lines
• Space for clues list below/beside grid

[claude]

✅ Spec ID: crossword-basic

Rationale: This is a classic puzzle grid visualization similar to existing specs like sudoku-basic and chessboard-basic, but distinct in its white/black cell pattern and numbered word starts.

Add label approved to begin generation.

[github-actions]

✅ Specification Ready: crossword-basic

PR: #3810

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specification.md

crossword-basic: Crossword Puzzle Grid

Description

A crossword puzzle grid visualization with white entry cells for letters, black blocking cells, and numbered starting positions for across and down words. The symmetric black cell pattern follows traditional newspaper-style crossword conventions, creating a clean and recognizable puzzle layout suitable for printing or digital display.

Applications

• Printable crossword puzzles for newspapers and puzzle books
• Educational vocabulary exercises and language learning tools
• Custom puzzle generation for events or themed activities
• Interactive puzzle games and mobile applications

Data

• grid (2D array) - Binary pattern indicating blocked (1) and entry (0) cells
• numbers (dict) - Mapping of cell positions to clue numbers for word starts
• Size: 10x10 to 15x15 cells typical for standard crosswords
• Example: 15x15 grid with symmetric black cell pattern and numbered word positions

Notes

• White cells for letter entry, black cells for blocking
• Numbers placed in top-left corner of cells that start words (across or down)
• Traditional 180-degree rotational symmetry for black cell placement
• Clean, uniform grid lines separating all cells
• Monochrome design optimized for printing
• Cell aspect ratio should be 1:1 (square cells)

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Next: Add approved label to merge this specification to main.

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