Quote from: etile on April 05, 2016, 11:08:51 AM

BitBet not works anymore so I want bet with anyone with 2of2 multisig transaction

Two out of two isn't the right way to go. What happens when the losing party refuses to let go of their funds? You will end up in a long (possibly 'permanent') stalemate. Just use what was suggested in the link that you've provided:

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Instead the parties could do a 2-of-3 which would allow a mediator to settle a dispute, that works exactly the same but instead of two public keys three would be provided.

Quote from: etile on April 05, 2016, 12:46:43 PM

Ok, I moved to 1:4 ratio

Odds are bad for the 'no' side. I don't see why someone would want to risk 4 BTC for a potential win of 1 BTC.