How to Solve Medium Sudoku Puzzles

Medium Sudoku is the bridge between beginner confidence and advanced logic. You usually need more than singles, but still do not need deep advanced chains.

1) Foundation Pass

• Clear all naked and hidden singles first.
• Use strict row-column-box scan sequence.
• Do not jump to advanced patterns too early.

2) Candidate Pass

Add candidates only in constrained areas. Keep notes short and clean.

3) Elimination Pass

• Apply box-line interaction (locked candidates).
• Spot simple pairs in units.
• Re-scan for new singles created by eliminations.

4) Finishing Pass

As board density increases, return to singles repeatedly. Medium puzzles often collapse quickly near the end.

FAQ

Do medium puzzles require guessing? No, not when elimination is used correctly.

Best daily practice? 1 easy + 2 medium sessions in Sudoku One9x.

Medium Puzzle Upgrade Path (2 Weeks)

Week 1: focus on consistent singles plus locked candidates. Week 2: keep that base and add pair eliminations in every puzzle. This progression is enough to move most players from occasional medium completions to consistent medium completions.

• Day 1-4: medium puzzles with no guess rule.
• Day 5-7: timed medium puzzles with full review.
• Repeat in week 2 with pair-focused sessions.

Benchmark Target

A good target is completing medium puzzles with fewer correction events week over week. Once that is stable, hard puzzles become far more manageable in Sudoku One9x.

Medium Puzzle Time Target

Set a realistic baseline first, then reduce average time gradually. Do not force a sudden speed jump. A better target is reducing hesitation points per puzzle, since hesitation is where medium puzzle time is mostly lost.

When to Move Up to Hard

Move up after you can solve medium puzzles consistently without guess-heavy play. A stable medium foundation makes hard puzzle learning far more efficient.