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Polybius Square 5×5
Standard Polybius A–Z coordinate square with I/J combined and two-digit examples.
| Row ↓ / Col → | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| 1 | A | B | C | D | E |
| 2 | F | G | H | I | K |
| 3 | L | M | N | O | P |
| 4 | Q | R | S | T | U |
| 5 | V | W | X | Y | Z |
This chart labels row first and column second. Examples: CACHE = 13 11 13 23 15. A keyed Polybius square may rearrange the alphabet.
Geocaching tip: Check whether the puzzle uses row–column or column–row order; not all Polybius ciphers use the same axis order.