Free puzzles

Newest Oldest Most solved Most liked

LNURL Pay Path

hexbox  -  October 26, 2026

A Lightning address like name@domain.com resol...

Invoice Default Expiry

hexbox  -  October 26, 2026

A BOLT11 Lightning invoice has no...

Halving Subsidy

hexbox  -  October 26, 2026

After Bitcoin's fourth halving in Ap...

Zap Kind

hexbox  -  October 26, 2026

On Nostr, a successful Lightning...

Bolt11 Prefix

hexbox  -  October 26, 2026

A Lightning Network payment request (...

Genesis Headline Date

hexbox  -  October 26, 2026

Satoshi embedded a newspaper headline in Bi...

Ygcv

Jggfxuv  -  September 29, 2026

J...

Guess it!

Bobbyra  -  August 20, 2026

1.What 5 letter word becomes shorter when you add 2 letters ?
2.I'm full of keys but can't open a single door....

Hidden word

satoshinakam9to  -  May 16, 2026

You are given these three words:

- FOOT
- ...

Hidden word

satoshinakam9to  -  May 15, 2026

You are given these three words:

- FOOT
- ...