Techniques › Full House › Practice
Practise the Full House
A house with one empty cell left. The first thing anyone learns.
8 real positions, each taken from an actual puzzle at the moment this was the cheapest move available. Two steps: find the cells that form the pattern, then find the candidate it rules out. A near miss tells you how many you had right, so getting it wrong is worth something.
| 14 | 17 | 8 | 469 | 4569 | 579 | 3 | 2 | 369 |
| 5 | 6 | 2 | 8 | 3 | 9 | 4 | 1 | 7 |
| 47 | 9 | 3 | 247 | 24 | 1 | 8 | 6 | 5 |
| 789 | 5 | 6 | 4679 | 4689 | 2 | 13 | 9 | 3489 |
| 289 | 2378 | 1 | 49 | 489 | 379 | 6 | 5 | 3489 |
| 89 | 38 | 4 | 5 | 1 | 369 | 2 | 7 | 389 |
| 128 | 128 | 5 | 3 | 7 | 4 | 9 | 68 | 26 |
| 3 | 48 | 79 | 26 | 26 | 59 | 57 | 48 | 1 |
| 6 | 24 | 79 | 1 | 59 | 8 | 57 | 34 | 23 |
How to spot it
Scan for a house with a single gap. Late in a solve they appear constantly, so after every placement glance at the three houses that cell belonged to.
Full explanation on the Full House reference page.
Practise something else
- Hidden Single A digit with only one home left in a house, even though that cell has other candidates.
- Naked Single A cell with only one candidate left.