Book · Board game
NUMIKA · Tomo IV · Difícil
Out on Wednesday 26 August. Big grids and not one free cell.
Out on Wednesday 26 August 2026.
NUMIKA is a variant of classic kakuro with four special rules that transform every puzzle: ×2 multiplier cells, linked cells that share a number, chains of consecutive numbers, and mirror cells that add up to 10. They are not decoration: without them, the puzzle has no solution.
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This is the Difícil level of the collection: 66 puzzles ordered by Mastery index, from 310 a 530. You can come from the previous volume or start here: the opening pages include the full instructions, the four rules with illustrated examples and the combinations table.
Guaranteed unique solution: every puzzle is computer-verified and solvable by reasoning, never by guessing. Full solutions at the end of the volume. High-contrast black and white interior with roomy cells to write in. Suggested age: 14+.
The NUMIKA collection runs to 5 volumes, from Beginner to Expert.