Finding Sudoku Puzzles with Specific Starting Numbers

I cannot generate Sudoku puzzles on demand. To find or create a puzzle with 2, 5, 3, 7, 9 in the first box (top-left 3×3):

Online Generators (Allow Seed / Partial Input)

• SudokuWiki.org (Andrew Stuart): "Import" → paste 81-char string (use 0/., for empty). Solver validates uniqueness.
• Sudoku-Online.org / Sudoku.com: Some allow "Create your own" with givens.
• GitHub: "sudoku-generator" repos: Python/JS scripts — modify to fix box 1 givens.

Manual Construction (If You Know Solving)

1. Place 2,5,3,7,9 in box 1 (5 givens).
2. Fill rest of grid logically (backtracking) ensuring unique solution.
3. Use a solver to verify uniqueness and rate difficulty.

Pre-Made Puzzle Collections

• Books: "Will Shortz Presents," "Nikoli," "Krazydad" (free PDFs at krazydad.com/sudoku).
• Apps: Good Sudoku (Zach Gage), Sudoku.com, Andoku 3 — daily puzzles, not custom givens.

For a specific pattern, a generator with constraint input (SudokuWiki) is fastest.