Look And Say
Each listed digit occurs exactly the stated number of times in the cage.
Parameters
| Parameter | Meaning | Default |
|---|---|---|
| cells | The marked cells, for example r1c1-r1c2-r2c2. | Required. |
| counts | Each digit and the exact number of times it must appear. | Required. |
Maths
Class: with aggregates.
The shared predicates define the notation and every named predicate.
∀p∈counts: countWhere(cells,λc:cell: D(c)=p.digit)=p.count
For each {digit,count}, that digit occurs in exactly count cells. Unlisted digits are unconstrained.
Example
---
format: open-rules
title: Look And Say example
setter: Example
source: ""
case: ""
library: https://rules.sudoku-sleuth.com/
status: read
---
```rules
sudoku 9x9
look-and-say r1c1-r1c2 counts [{"digit":1,"count":1}]
```
Satisfies the rule: r1c1=1, r1c2=2. Digit 1 appears exactly once.
Breaks the rule: r1c1=1, r1c2=1. Digit 1 appears a different number of times.