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Bitcoin => Bitcoin Technical Support => Topic started by: WaddahLy on November 07, 2025, 10:35:09 AM



Title: Say you win PUZZLE #71, How do you SAFELY sweep the UTXOs?
Post by: WaddahLy on November 07, 2025, 10:35:09 AM
Hello

Puzzles #66, #69 were stolen as publicly known.  :-[

What is the safest way to go about sweeping the funds if you’re lucky enough to find the private keys? 🔑


Title: Re: Say you win PUZZLE #71, How do you SAFELY sweep the UTXOs?
Post by: LoyceV on November 07, 2025, 11:20:25 AM
There is no safe way to broadcast a transaction with largely compromised private key: the moment it hits mempool, multiple bots will start an RBF-fight up to the point where the large majority of the Bitcoins are burned as mining fees.
The only way to keep it private until it's confirmed is by using a private mining pool that doesn't broadcast it. MARA Slipstream (https://slipstream.mara.com/) is said to work, but I haven't tested it.

You should post this in Bitcoin puzzle transaction ~32 BTC prize to who solves it (https://bitcointalk.org/index.php?topic=1306983.0).


Title: Re: Say you win PUZZLE #71, How do you SAFELY sweep the UTXOs?
Post by: nc50lc on November 08, 2025, 04:24:39 AM
This has been discussed a a few times in different threads.

Just read these threads/posts for the answers;
The former contains more information about your options and the latter is an example of the best option you currently have:
  • solve key 66 67 Puzzle how to avoid double spends the tx? (https://bitcointalk.org/index.php?topic=5492493.msg63950420#msg63950420)
  • /index.php?topic=1306983.msg64379149#msg64379149 (https://bitcointalk.org/index.php?topic=1306983.msg64379149#msg64379149)