Poker Tournament Rules Page 14

total by 50. Which is larger? The 100 is still the “largest bet or raise of the current round”, so if B wants to re-raise he must raise at least 100 for a total of 250.
Example 3: NLHE, Blinds 100-200. On the turn A bets 300. B pushes out two 500 chips making the total 1000 (a 700 raise). It is 1000 to C to call. If C wants to raise, it must be “at least the largest bet or raise of the current round”, which is B’s raise of 700. So C’s minimum raise would be 700 for a total of 1700. Note his minimum raise is not 1000, B’s total bet.
Example 4-A: NLHE, Blinds 25-50. A raises 75 to 125 total. NOTICE that 125 total = 50 (bet) plus 75 (raise). The next raise on this street must be “at least the size of the largest previous bet or raise”, which is 75. B now raises the minimum (75) to 200 total. C then re-raises 300 for total of 500. We now have a bet of 50, two raises of 75 and a raise of 300 for total 500. If D wants to re-raise, “the raise must be at least the size of the largest previous bet or raise of the current betting round”, which is now 300. So D would have to raise at least 300 to a total of 800. Example 4-B: Same as 4-A. It's the same 500 to D, but there’s just been one raise of 450 by A to a total of 500 and B and C have both called. So there’s a blind bet of 50 and a raise of 450. "A raise must be at least the size of the largest previous bet or raise of the current betting round", which is A’s raise of 450. So it’s 500 for D to call, and if D wants to re-raise he must raise at least 450 for a total of 950.

Rule 41: Re-opening the bet.

Example 1. Series of short all-in wagers that add up to a full raise and thus re-open betting:
NLHE, Blinds 50-100. Postflop, A opens betting for the 100 minimum.
B goes all in for a total of 125. C calls the 125,
D goes all in for 200 total and E calls 200.
Action returns to A who is facing a total raise of 100. Since 100 is a full raise, the betting is re-opened for A who can fold, call, or raise here. Note that neither B’s increment of 25 or D’s increment of 75 is by itself a full raise, but when added together they total a full raise and thus re-open the betting to “a player who is facing at least a full raise when the action returns”.
Example 1-A: At the end of Example 1 above, A smooth calls the 200 total (another 100 to him). The bet is now on C who is only facing a 75 increment. C called the 125 previously and is now facing 200 total (a 75 increment). Because 75 is not a full raise, the betting for C is not re-opened and C can either put out an additional 75 or fold, he cannot raise.
Example 1-B: At the end of Example 1 above, A raises the minimum (100), and makes it 300 total to C. C already has called 125 so it’s an additional 175 for C to call. 175 is more than a full raise. Since C already acted and is “now facing at least a full raise”, the betting is re-opened to C who can fold, call, or re-raise here.
Example 2. Short all-in, 2 scenarios. NLHE, Blinds 2000-4000. Pre-flop A calls the BB and puts out 4000. B folds and C pushes all-