DIFFICULTY · MASTER
Master Sudoku
Master puzzles are advanced classic grids designed for deliberate solving, sparse progress and multi-step logic rather than speed alone. Genius is the final tier above Master.
Who Master is for
Choose Master after advanced fish, wings and chains feel familiar and you can preserve a precise candidate grid through a long solve.
Techniques to practise
Combine X-Wing and larger fish, wings, coloring, unique rectangles and candidate chains while checking for simpler deductions first.
A disciplined workflow
Separate observation from elimination: identify the pattern, verify every premise, then remove only the candidates proven impossible.
Common mistake
Do not force an advanced pattern when a hidden single or locked candidate was missed. Re-scan fundamentals before extending a chain.
Expert versus Master
Expert puzzles often hinge on one or two advanced patterns. Master grids may require several interacting patterns while offering fewer obvious recovery points.