NORTHGRID PRESS / VOLUME 1

Logic puzzles for serious solvers.

Every puzzle in our books is computer-verified to have exactly one solution. Difficulty is rated by the solving techniques each puzzle actually requires, not by counting clues.

Volume 1 200 puzzles
Range Easy to Expert
Format Paperback
VOLUME 1 / AVAILABLE NOW

Built for solvers who want a real challenge.

Two hundred puzzles arranged in four difficulty tiers. Every puzzle has been verified by computer to have exactly one solution. Difficulty is rated by the solving techniques each puzzle actually requires, so the Expert puzzles really are expert. Full solutions in the back.

  • Puzzles200
  • Difficulty tiersEasy to Expert
  • Pages264
  • Trim size6 × 9 inches
  • SolutionsIncluded
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OUR APPROACH

Three things make a Northgrid puzzle different.

01

Computer-verified uniqueness

Every puzzle has exactly one solution. We don't ship puzzles with multiple endings or ambiguous clues. Each one has been verified by our own solver before it goes to print.

02

Technique-based difficulty

Difficulty is rated by the hardest technique needed to solve the puzzle, not by how many numbers are missing. A sparse grid might only need naked singles. A full-looking grid might hide an X-wing.

03

No guessing required

Every puzzle is solvable by pure logical deduction. If you're stuck, there's a step you've missed, not a coin flip you need to make.

VOLUME 1 / WHAT'S INSIDE

Four difficulty tiers, calibrated by required technique.

EASY
40
Solvable using naked singles only. A warm-up for the techniques to follow.
MODERATE
100
Requires hidden singles. The natural ground for most solvers, where most of the book lives.
HARD
40
Intermediate techniques: naked pairs, pointing pairs, box-line reduction. Pencil marks essential.
EXPERT
20
Sparse clue counts, deep technique chains, and occasional X-wing patterns. The toughest puzzles in the book.