Of course OpenPPL supports arbitary complex mathematical expressions. As an example let us consider odds and outs.
// Calling according to odds and outs
WHEN AmountToCall / (AmountToCall + PotSize) > Outs / CardsLeft Call FORCE
Off course this example is a bit simplistic. It does not consider other players in the pot, implied odds on future streets, the chance to semi-bluff, etc. But I think you get the point.
The following operators are supported:
|true, if you are on the button|
|<||smaller||AmountToCall < 5||true, if there are less than 5 big blinds to call|
|true, if the pot is larger than 20 big blinds|
|AmountToCall <= 5|
|>=||larger or equal||PotSize >= 20|
The logical operators “and”, “or”, and “not” should be pretty self-explanatory.
|Not||WHEN (HaveNothing AND OpponentsLeft >= 2 AND NOT BotIsLastRaiser) Check FORCE|
|And||WHEN (BotIsLastRaiser AND OpponentsLeft = 1 AND Bets = 0 And … BetHalfPot FORCE)|
|XOr||Meaning: either or, which is true, if exactly one of the operands is true, but not both|
|Or||WHEN (hand$AA OR hand$KK) RaiseMax FORCE|
Negation (Not) has highest priority of all operators, thereafter follow And, XOr and OR in decreasing order. So if you want to write an expression like
WHEN AmountToCall <= 4 AND (hand$22 OR hand$33…))
you have to throw in some extra brackets, otherwise the bot will call with 33 any bet and that is probably not what you want. More complicated expressions sometimes lead to confusion. If you have a problem with that you might want to revisit the basics of mathematical logic and the “Laws of De Morgan”.
OpenPPL also supports basic arithmetic. The usual rules apply of course. The percentage-operator has the same priority like multiplication and division, which is higher than addition, subtraction.
|%||Percentage-operator||WHEN (AmountToCall <= 50% PotSize) Call FORCE|
Bitwise Operators (for Experts)
Furthermore OpenPPL supports bitwise operations that work on all single bits of bit-vectors or binary numbers simultaneously. They are useful for very low-level-stuff like detecting which chairs are seated with Poker bot’s bitwise symbols (playersseatedbits, playersdealtbits, etc.). Most players won’t ever need these symbols, so we will only give you a link to a good explanation here: http://en.wikipedia.org/wiki/Bitwise_operation