Blockchain game · Proof of workHash
Hash
Hunt
Mine real SHA-256 blocks in your browser, raise the difficulty, then tamper with your own chain and watch it break. Proof of work, learned by doing.
Hash Hunt
Mine the next block
Difficulty: leading zeros
0Nonces tried
0.0sTime
0Hashes per second
—Expected tries at this difficulty
Your chain
Mine a few blocks, then edit the data of an old one: watch every block after it break.
01Is the hashing real?
Yes. Every attempt is a real SHA-256 hash computed by your browser. Nothing is sent anywhere.
02Why does each extra zero take so long?
Each extra leading hex zero makes a valid hash about 16 times rarer, so you need about 16 times more attempts.
03Why does editing an old block break the chain?
Its hash changes, so the next block no longer points to it and its proof of work is no longer valid. Rewriting history means re-mining everything after it.
04Does this mine real crypto?
No. It is an educational game: the blocks live only in your browser tab.
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