Okay, I'm back.
Let's take the same scenario and break it down so even I can understand where we're going.
No limit (six players) Blinds 300/600...UTG (Player A) raises 900 for a total bet of 1500. At this point the min raise is another 900...Player B raises 900 for a total bet of 2400. Player C folds, Player D folds, and the SB and BB also fold...
Back to Player A...his options are: Fold, Call 900 more, or raise at least another 900. The only exception would be if he were in an all-in situation with less than the call amount (900), or less than the required amount to re-raise (1800 more).
Now I'd like to change it up a bit, for anyone, other than myself, that is having problems with some examples that are correct but too short to cover everything.
Same scenario: Player A raises the 600 BB 900 more (total bet 1500), Player B Calls 1500...Player C goes all-in for 1600 (a short action only wager), Player D folds, as do the blinds...
Back to Player A...He may fold or call 100 more...that's it! He can not re- raise Player C because his "action only" short all-in is not a valid amount (minimum raise amount of 900 more) to re-open any betting.
I guess my confusion comes from the abbreviated example given. I understand the raise rules but I sometimes have a difficult time interpreting what we are trying to say with our short (but not simplified) version.
Mike, thanks for being tolerant.
All I can say is the students that I train, new to poker, need more than we sometimes give.