| a | b | c | d | e | f | g | h | i | |
| A | 3 | 4 | |||||||
| B | 3 | 1 | 9 | ||||||
| C | 5 | 9 | 6 | 8 | |||||
| D | 6 | 9 | 4 | 8 | |||||
| E | |||||||||
| F | 7 | 4 | 3 | 9 | |||||
| G | 9 | 4 | 8 | 2 | |||||
| H | 6 | 8 | 1 | ||||||
| I | 1 | 7 |
The Two out of Three technique helps to find squares for solving with the Only Choice and Only Square rules. It relies on carefully following the same logical thinking across the whole grid, taking groups of three rows or columns at a time. It looks at each number 1 to 9 in turn. usually it will find a square or two to be solved.
Stopped. Press the Play button to automatically run through the tutorial. Help page.
Welcome to a Sudoku Dragon tutorial. Use the bar under the grid to control how it is run. The buttons let you Stop; Play; Rewind back to start; Go back a step; Go forward a step.