For example , if one player bids 5 , the next player may bid ' 5 for 10 ' , effectively doubling the outcome if they 're right or wrong .
In some variations , doubling of the bid is allowed as a half - point bet .
If one player bids 5 , the next player may bid ' 5 for 10 ' , effectively doubling the outcome if they 're right or wrong .
In some variations , doubling of the bid is allowed as a half - point bet .