~
Thanks for the warning and the links.
@nubcake_MeoW_ and @FatManTerra
I've built the transaction, and posted a QR code and a PSBT file to our Telegram discussion group. One of you will need to add your signature and broadcast the transaction, but before you do please confirm the addresses and the amounts are correct.
Thank you both.
Obviously, I am disappointed by this decision. I don't believe the terms of the bet were correctly upheld given all of the comprehensive background information provided. I'm also very displeased that your original decision was changed based on the opinion of someone who himself claimed to be confused by the situation.
This was an important lesson for me in trust and counterparty risk - don't so easily assume that the other party will always act in good faith even though you have no reason to believe otherwise.
That being said, I agreed to comply with your decision at the outset without complaint.
Thank you for your help with this. (No hard feelings from me - that's just how it goes - I'm sure you did what you believed to be correct.)
Signed and broadcasted:
https://blockchair.com/bitcoin/transaction/b172c884fd4f419b47e53229d43692a40322dece3fe94eb6f501aded44ca2fb2