Caesar Cipher

How to play Caesar Cipher

1. Shift letters backward to decode a short message.
2. Read the prompt carefully and choose an answer, or type into the answer field.
3. After checking, read the explanation. Use “Next round” to continue.
4. Complete ten rounds for a score out of 100. Restart creates a fresh session.

A worked example

Move every letter BACK 2 places. kuncpf

the answer is island. Wrap from A back to Z when needed.

A useful way to practice

These activities use English words and spelling. Language familiarity affects performance, so a score is not a general intelligence measure. Read the full instruction: spelling, meaning and letter order are different tasks.

What your result means

This is a recreational words activity. Results describe performance on this particular task, with this device and these rules. They are not a clinical assessment, IQ score or promise of improvements in daily life. Your best result and recent sessions stay in this browser; no account is required.