Connect the sequence. Master the grid.
Numbrix™ is a sequential path puzzle — fill every cell so numbers run from 1 to N², each consecutive pair touching horizontally or vertically. Verified unique solutions, powered by the Balthrop Logic Engine™.
↑ Watch the sequence path reveal itself
Every Numbrix puzzle is solvable through systematic deduction. Each clue narrows the path — follow the sequence to complete the grid.
Pre-filled numbers anchor the sequence. Identify where consecutive numbers must connect based on their neighbors and grid position.
Each number must connect horizontally or vertically to the next — no diagonals. Trace the continuous path through every cell.
Fill every blank so numbers run 1 through N². The path visits every cell exactly once. One solution, proven unique by our solver.
From warm-up to expert — every puzzle is calibrated by the BLE analyzer so the rating always matches the solve experience.
High clue density, shorter gaps. Ideal for beginners learning the path-tracing logic.
Balanced clue coverage. Requires sequence deduction across multiple cells.
Sparse clues, large gaps to bridge. Path logic must carry across wide sections.
Minimal anchors, maximum deduction. Only for seasoned Numbrix solvers.
Every puzzle passes a uniqueness gate before delivery — exactly one solution, guaranteed by the Balthrop Logic Engine™.
Starts the moment you place your first number. Beat your best time and track your improvement across sessions.
Stuck? Request a hint to reveal one logical next step — without spoiling the solve experience.
5×5 through 12×12. Choose your challenge size — larger grids require longer path reasoning chains.
Each puzzle is scored by the BLE Analyzer — branching points, forced moves, and gap spans are all measured.
Track your streak, best times, and solve count. Your progress is saved across sessions automatically.
The Numbrix MindWorks Series™ brings our verified puzzles to print — curated difficulty progressions, clean typography, and professional puzzle construction ready for publication or your personal collection and bookshelf.
Free to play. No account required. Every puzzle solver-verified and delivered instantly.