1# Takuzu23Fill the grid with two symbols so that every row and column obeys three simple rules.45## Rules67- **No triples**: Three consecutive identical symbols in a row or column are not allowed.8- **Equal count**: Each row and column must contain exactly the same number of ● and ○.9- **Unique lines**: No two rows may be identical, and no two columns may be identical.1011Pre-filled cells (shown in **bold**) are locked and cannot be changed. The puzzle is12solved when every cell is filled and all three rules are satisfied.1314The context row below the grid shows the current cursor row and column counts for15`0` and `1`. Count chips invert when a line reaches its quota and turn into an16error chip if a line goes over quota.1718## Controls1920| Key | Action |21|-----|--------|22| `Arrows` / `wasd` / `hjkl` | Move cursor |23| `Mouse left-click` | Move to a cell, or cycle the current editable cell |24| `z` / `0` | Place ● (filled) |25| `x` / `1` | Place ○ (open) |26| `Backspace` | Clear cell |27| `Ctrl+H` | Toggle full help |28| `Ctrl+R` | Reset puzzle |29| `Escape` | Return to main menu |3031## Tips3233- **Sandwich rule**: If two identical symbols are next to each other, the cells on34 either side *must* be the opposite symbol. For example, ● ● means the neighbours35 are both ○.36- **Count what you have**: When a row or column already has its full quota of one37 symbol, the context row marks that count so every remaining empty cell in that38 line must be the other symbol.39- **Avoid the third**: Before placing a symbol, glance one and two cells ahead in40 each direction. If placing it would create three in a row, it has to be the41 other symbol.