Sator square¶
sator_square · visual · validated
A five-by-five word square reading identically in four directions, the best-known instance of the palindromic grid.
Provenance¶
- Source: Traditional; attested at Pompeii before 79 AD
- Attribution:
traditional— classical or folk; no single origin to name - Checkability:
self— decidable from the text and its parameters alone - Attested:
codified— formulated as a rule by a tradition rather than declared by an author
Details¶
- Kind: restrictive
- Languages: en
- Requires:
tokens,fold_diacritics - Deterministic: yes
- In other languages: Sator-Quadrat (de), Carré Sator (fr)
Prompt hint¶
Build a five-by-five square reading the same forwards, backwards, down and up.
Parameters¶
| Name | Type | Default | Description |
|---|---|---|---|
fold_diacritics |
boolean | True |
Treat accented letters as their base letter, and ß as ss. |
Examples¶
pompeii-square¶
en — this text satisfies the procedure.
sator
arepo
tenet
opera
rotas
Source: Traditional; attested at Pompeii before 79 AD
broken-square¶
en — this text does not satisfy the procedure.
sator
arepo
tenet
opera
rotax
Source: constructed counterexample