Pack-verified Calcudoku (logic-first, single-solution)
Train arithmetic reasoning—one verified puzzle at a time.
Choose a profile and grid size, generate a verified puzzle, and solve with logic alone. Timer starts on your first move for true skill tracking (not on load).
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Mode: Pack-Verified
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Grid: —
Tip: Mark cages first, then place digits
Choose profile + grid, then click New Puzzle.