Match CHK|SM pairs.
When all CHK|SM pairs match, you win!
The top-left most cell shows the board's encoding scheme. In the encoding label, the first number is the board's base and the second is the digits per group.
| 2|3 | 4 | 2 | 1 | CHK | SM |
| 4 |
0
|
0
|
4 | 0 | |
| 2 |
0
|
1
|
0
|
2 | 2 |
| 1 |
1
|
1
|
7 | 6 | |
| CHK | 5 | 3 | 1 | ||
| SM | 1 | 3 | 0 |
In the example above, the game board will be composed of groups of 3-digit numbers in base 2.
Boards can have different group counts. The example above has 1 row group and 1 column group. Groups are differentiated by their colors.
The board below has 1 group of rows and 2 groups of columns:
| 2|2 | 2 | 1 | 2 | 1 | CHK | SM |
| 2 | 0 | 1 | 1 | 4 | 3 | |
| 1 | 0 | 1 | 1 | 4 | 3 | |
| CHK | 0 | 3 | 3 | 3 | ||
| SM | 0 | 2 | 3 | 1 |
Each row or column in a group contains one number represented in the base of the game board. The board above has 2 column groups, so each row in the board contains 2 numbers represented in base 2.
The sum of these numbers is in the SM cell at the end of the row:
| 2|2 | 2 | 1 | 2 | 1 | CHK | SM |
| 2 | 0 | 1 | 1 |
4 | 3 |
The CHK value next to the SM shows the target sum for that row. Since the current SUM in the example above is 1 less than its CHK value, the missing value in this row must be 1.
Editable cells are marked with an empty circle. Click an editable cell to increase its value. At the maximum (base – 1), clicking clears it. Try with the example below:
| 2|2 | 2 | 1 | 2 | 1 | CHK | SM |
| 2 | 0 | 1 | 1 |
4 | 3 |
Right-click (desktop) or long-press (mobile) an editable cell to toggle a flag to mark suspects.
Tutorial
| 2|2 | 2 | 1 | 2 | 1 | CHK | SM |
| 2 | 0 |
1 |
1 |
4 | 3 | |
| 1 | 0 |
1 |
1 |
4 | 3 | |
| 2 | 0 |
1 |
1 |
1 |
4 | 4 |
| 1 | 0 |
1 |
4 | 3 | ||
| CHK | 0 | 3 | 3 | 6 | ||
| SM | 0 | 2 | 3 | 3 |
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