Takuzu
Fill the grid with two symbols following three simple rules.
How to Play
Fill every empty cell with either a filled circle (●) or an open circle (○) so that the grid satisfies three rules:
- No triple: No three consecutive identical symbols in any row or column.
- Equal count: Each row and column must contain exactly N/2 of each symbol.
- Unique lines: No two rows may be identical; no two columns may be identical.
Pre-filled cells (shown in bold) cannot be changed. The puzzle is solved when every cell is filled and all three rules are satisfied.
Controls
| Key | Action |
|---|---|
| Arrow keys / WASD / hjkl | Move cursor |
| Mouse left-click | Move to a cell, or cycle the current editable cell |
z / 0 |
Place ● |
x / 1 |
Place ○ |
Backspace |
Clear cell |
Ctrl+R |
Reset puzzle |
Ctrl+H |
Toggle full help |
Escape |
Return to main menu |
Modes
| Mode | Grid | Clues | Techniques Required |
|---|---|---|---|
| Beginner | 6x6 | ~50% | Doubles and sandwich patterns |
| Easy | 6x6 | ~40% | Counting required |
| Medium | 8x8 | ~40% | Moderate deduction |
| Tricky | 10x10 | ~38% | Uniqueness rule needed |
| Hard | 10x10 | ~32% | Long deduction chains |
| Very Hard | 12x12 | ~30% | Deep logic required |
| Extreme | 14x14 | ~28% | Maximum challenge |
Quick Start
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