This situation came up last night: Last hand, one will advance. Bet range 100 to 10,000 in increments of 25. Blackjacks pay 3:2. No surrender. You can insure for up to half your bet and insurance pays 2:1. The first-to-act button is on BR4. The following are the bankrolls and the action in the order everyone acted: =>BR4 = 1,000 bet 1,000 BR3 = ~8,500 bet ~8,500 all in BR2 = 18,000 (me) bet 9,000 BR1 = 22,700 bet ? What would you bet if you were BR1, and why? BR1 must choose from these options: - Bet low enough to protect against a half swing by BR2, which also protects against a full swing by BR3. - Bet high enough to be able to double down to cover BR2's all in double down. There is another factor here affecting BR1's bet choice. Can you identify it? The actual play of the hand was interesting as well, but let's talk about the betting first.