Balthrop Logic • Samurai Lab

Overlapping Samurai Sudoku — verified by design — powered by the Balthrop Logic Engine™

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Samurai MindWorks™ Verified Overlap Edition Engineered 21×21

Play Verified Samurai

A five-grid, overlapping Samurai Sudoku system engineered with the Balthrop Logic Method and powered by the Balthrop Logic Engine™ — built for clarity, consistency, and solver trust.

▶ Play Online Shop the Books Learn the Engine
Each board includes a Generation Trace ID for internal QA continuity. (Puzzle display does not expose engine IP.)

Series Overview

Season drop
Four calibrated tiers — Easy, Medium, Hard, Expert — designed for large-print readability and stable overlap geometry.
Built for your workflow: generate → verify → publish → mirror online play.

Samurai MindWorks Series™ Welcome

New
Watch the Samurai MindWorks™ welcome — and see Easy, Medium, Hard, and Expert positioning in action.
Prefer YouTube? Open in a new tab .

How to use

Quick
1) Choose a tier
2) Play online (optional)
3) Solve in print with confidence
4) Move up tiers when ready

Links

Hub
Play Samurai Collections
Tip: use the online version as a “practice arena,” then switch to print for deep focus sessions.
Season 1 — Easy
Entry tier Overlap familiarization
Build confidence across five connected grids. Designed to feel clean and learnable.
  • E1
    Warm Start
    Learn overlap flow and cross-grid impacts.
Season 2 — Medium
Core tier Stronger deductions
Sharper structure — more dependencies across overlaps, fewer freebies.
  • M1
    Cross-Grid Control
    Overlap constraints become the main engine of progress.
Season 3 — Hard
Advanced tier Higher density
Requires careful sequencing — a decision in one grid can unlock the whole board.
  • H1
    Chain Reactions
    Solve order matters. Build momentum deliberately.
Season 4 — Expert
Top tier For serious solvers
Minimal slack across overlaps. Engineered to challenge without breaking trust.
  • X1
    Verified Overlap
    When overlap logic becomes the entire puzzle.