⚔️ Samurai Sudoku
Samurai Sudoku is five overlapping 9×9 grids arranged in a cross — a true endurance challenge.
Rules
- Each of the five 9×9 grids follows normal Sudoku rules on its own.
- The four corner grids share their inner 3×3 box with the central grid.
Strategy
The shared overlap regions are the key: a digit you place there counts for two grids at once. Work the overlaps first, then let those deductions ripple outward into each grid.
🏆 Difficulties & scoring
This type can be played on all five difficulties. The score multiplier for Samurai is ×2 — so every point counts for more on this variant. The "normal time" below is tuned for this type.
| Difficulty | Base score | Max (×2) | Normal time | Hints |
|---|---|---|---|---|
| easy | 150 | 600 | 15 min | 7 |
| medium | 300 | 1200 | 30 min | 6 |
| hard | 600 | 2400 | 45 min | 5 |
| expert | 1000 | 4000 | 60 min | 4 |
| evil | 1500 | 6000 | 90 min | 3 |
How the score is calculated
Your score builds up from 0 as you place correct numbers, up to the full base when the board is finished. Then two bonuses are added:
base × (1 + combo bonus + time bonus) × 2
- Progress: the live score climbs from 0 to the base as the grid fills with correct numbers.
- Combo bonus (up to +50%): keep a clean run for the full bonus. Each error or hint is a combo break that shrinks the bonus — but it never takes points away below the base.
- Time bonus (up to +50%): beat the normal time and you earn extra, proportional to how much faster you were. Finishing slower than normal costs nothing — there is no time penalty.
- The total is multiplied by ×2 and never drops below 0.
Coins
The coins you earn reflect your score — the more points, the more coins (about 1 coin per 20 points, minimum 1). Spend coins in the Shop on hints and Jokers.
Tip: a clean, hint-free solve under the normal time scores the highest. The Daily Challenge is always Classic and fully scored.