Originally Posted by WVHillbilly
The problem in this case is that UG didn't have enough left to reopen the betting when he shoved. UG only shoves for 3BB more. He would have needed to have an 18BB stack for his reshove to reopen betting in this case.
Had BB only min raised to 6BB and UG then shoved to 12BB it would have reopened the betting and BB could have reshoved.
I am not sure I follow what you are saying. Lets add the starting stacks to the scenario.
UG starts the hand with 12xBB
Btn starts the hand with 33xBB
BB starts the hand with 34xBB
UG raises 3xBB leaving 9xBB stack behind.
Btn calls 3xBB leaving 30xBB behind.
BB 3-bets 9xBB leaving 25xBB behind.
UG shoves all in 12xBB.
Btn calls 9xBB (3+9=12BB) leaving 21xBB behind.
BB needs to call 3xBB (9+3=12BB) which still leaves 22xBB behind for a side pot with Btn why can't he re-shove here to cover Btn for all his chips?