Extended Box Rule
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| 3 | 2 | |||||||||||
| 5 | 3 | |||||||||||
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Extended Box Rule:
The green fields form a two by two box with an additional field, an "extended box". We look at placing 2 in the box. The box rule still works but it eliminates 2 only from the yellow cells shown.
| 1 | ||||||||||||
| 3 | 2 | |||||||||||
| 5 | 3 | |||||||||||
| 1 | ||||||||||||
Extended Box Rule:
The green fields form a two by two box with an additional field, an "extended box". We look at placing 2 in the box. The box rule still works but it eliminates 2 only from the yellow cells shown.