The original main goal of the OpenHoldem development team was the attempt to create a WinHoldem-compatible botting-platform to support existing bots, DLLs and TableMaps. However there has been functionality such as “Teaming”, that always has been a tabu for the OpenHoldem development team. Other functionality did never get implemented due to lack of documentation and practical relevance. And now that OpenHoldem is far more advanced and WinHoldem is practically dead, backward-compatibility is no longer such an important issue. Recently the development team revisits some features that look a bit mal-designed and tries to improve them carefully, trying to affect the end-user as little as possible. This chapter will tell you about such incompatibilities.

OpenHoldem does not support any kind of collusion. There is no support for WinHoldems WinTellem-server and card-sharing either because such activities are simply illegal in every country of the world, and — even more important — because we consider them unfair too.

Table Maps are in a different format due to hypothetical copyright-issues. For some time it was possible to convert a WinHoldem profile to an OpenHoldem Table Map with OpenScrape. But this is no longer of any practical relevance, as all WinHoldem-”profiles” are supposed to be outdated and there is no longer any maintenance going on. So finally we removed support for WinHoldem-tablemaps completely.

The formula is saved in a single file instead of two. It uses the extension *.ohf instead of *.whf and *.whx. Old WH-formulae could be converted for some time, but as there was no longer any demand for this feature we were happy to simplify OpenHoldems code. OpenHoldem does still use a plain-text-format, so *.ohf-files can be edited using your favourite text-editor. or the built-in formula-editor.

ManualMode is not directly integrated into OpenHoldem, but became a stand-alone application. This did simplify the GUI of OpenHoldem extremely and made it far more easy to use.

Calculating expectation values is only one possible way (out of many) to implement a poker bot, but not necessary in general. Furthermore it proved to be cumbersome and unpopular. So the functions f$evrais and f$evcall from WinHoldems demo-bot have been degraded to user-defined-functions.

The function f$play has been a quite messy concept to handle sitting in, sitting out and leaving the table. Some extra coution was necessary to avoid multiple button-clicks within a short time-frame on identical or outdated game-states. With OpenHoldem 4.0.0 f$play got replaced by three indivudal functions: f$sitin, f$sitout and f$leave, which get executed exactly once every 4 seconds. Furthermore we added a f$close-function to click the [x] in the titlebar of a window if the user desires to leave a table.

f$swag (short for “stated wager”) was WinHoldems way to define the betsize for No-Limit games. As online casinos interpret your input in at least three different ways some adjustment was necessary, including:

f$srai	the desired amount to raise (the part which exceeds the bet of the aggressor)
f$swag	the final amount to be entered into the software
f$swag_adjust	the casino-specific adjustment between f$srai and f$swag
swagtextmethod	the casino-specific way to interpret swag, as defined in the tablemap
sraimin	the smallest possible raise
sraimax	the largest possible raise.
sraiprev	the difference between the two largest unique wagers

All these computations had to be done by the user at the formula level. With OpenHoldem 4.0.0 this mess got replaced by a single function f$betsize and OpenHoldem cares about all the rest automatically (depending on the swagtextmethod specified in your tablemap, but that is all work that’s left). The supporting tablemap symbols got renamed.

Former TM-symbol	New TM-symbol
swagselectionmethod	betsizeselectionmethod
swagdeletionmethodmethod	betsizedeletionmethodmethod
swagconfirmationmethod	betsizeconfirmationmethod
swagtextmethod	betsizeinterpretationmethod

The symbols to calculate “risk of ruin” have never been implemented due to lack of documentation and lack of practical relevance. As of OpenHoldem 2.0.0 the risk-of-ruin-symbols are officially abolished and removed from the code-base. The original documentation for these symbols can be found here:

• WinHoldEm Help - Formula Editor (http://www.winholdem.net/help/help-formula.html)

• WinHoldem-Forum: Risk Of Ruin (http://forum.winholdem.net/wbb/viewtopic.php?t=2120)

OpenHoldem is now half a dozen years old. During these long period of usage it became noticeable that some symbols and features of WinHoldem were unnecessary (risk of ruin), some others unusable, some undocumented (versus2), and some even undesired.

Symbol	Explanation	Reason for removal
nfriendsdealt	1 if you are dealt, 0 otherwise (0-1)
1-2 nfriendsblind	1 if you are in a blind, 0 otherwise (0-1)
1-2 friendsseatedbits	bits 9-0: 1=seated 0=unseated, you only
1-2 friendsactivebits	bits 9-0: 1=active 0=inactive, you only
1-2 friendsdealtbits	bits 9-0: 1=dealt 0=notdealt, you only
1-2 friendsplayingbits	bits 9-0: 1=playing 0=notplaying, you only
1-2 friendsblindbits	bits 9-0: 1=blind 0=notblind, you only
swagdelay	Autoplayer delay in milliseconds between swag keystrokes and button click as defined in Preferences (formerly TableMap)
1-2 allidelay	Autoplayer delay in milliseconds between alli slider jam and button click as defined in Preferences (formerly TableMap);
allinmethod	used to detrmine which method to use for allin	OpenHoldem will now automatically chose an appropriate method try to click allin (or max), optionally followed by clicking raise (if allinconfirmationmethod is non-zero). try to use the slider if it exists in the tablemap. finally try to swag the balance. This new behaviour tries the most fail-safe and most human-like methods first and in addition reacts flexibly on the options available.
islistcall	true if your hand is in list 0
1-2 islistrais	true if your hand is in list 1
1-2 islistalli	true if your hand is in list 7
1-2 isemptylistcall	true if the call list is empty
1-2 isemptylistrais	true if the rais list is empty
1-2 isemptylistalli	true if the alli list is empty
1-2 nlistmax	highest list number in which your hand is listed
1-2 nlistmin	lowest list number in which your hand is listed
handnumber	the site hand number if available	Removing formula symbol handnumber for various reasons from the formula level: there is no need for it at the formula level. it may contain characters and therefore doesn’t fit into a variable of type double. its length may exceed the precision of double. Handnumber gets now used only internally to trigger handresets.
isfiveofakind	true when you have a five of a kind
1-2 fiveofakind	0xff000000 (pokerval constant)
isppro	true if you’re connected to a ppro server
1-2 site	0=user/ppro 1=scraped
bankroll	the user defined, real world bankroll
1-2 rake	percentage amount added/subtracted to/from the pot
defcon	defense level is typically used in the f$P formula, which defines the adapted number of opponents to be used in standard prwin. defcon therefore controls the optimism of the prwin-simulation. 0.000=maxoffense 1.000=maxdefense The Formula Editor parameters dialog uses values 0-10
1-2 isdefmode	true when defcon is at max
1-2 isaggmode	true when defcon is at min
clocks	number of CPU clocks since the last screen scrape	Useless information and always a fraction of a second
nclockspersecond	number of CPU clocks per second
1-2 ncps	synonym for nclockspersecond
nflopc	short for ncommoncardsknow
1-2 br	short for betround
1-2 ncps	short for nclockspersecond
1-2 oppdealt	short for nopponentsdealt
isbring	true if OpenHoldem is attached to a Bring client window
1-2 ismanual	true if you’re in manual mode, false otherwise
handrank	one of the handrank-symbols based on the option specified in preferences	Getting rid of the symbol handrank and the option symbols->Value of Handrank. We have handrank169, handrank1000, handrank1326, handrank2625 and handrankp at the formula level. So the user can clearly specify what he wants. But these symbols can hardly get used interchangeably, so this option was only confusing and superfluos.
randomround1 ... randomround4	random number in the range [0.000..1.000) for round 1 - 4. Value is calculated only once in that round.	Removed the symbols randomround1..randomround4 from the codebase, because we have randomround for the current betting round and additionally randomhand, randomheartbeat and random, which gets calculated each time new. This simplified the code and looks more clean.
callshort	total amount that will be added to the pot if all players call
1-2 raisshort	callshort + bet * nplayersplaying
seatposition	your seat position relative to the dealer	Removing the symbol seatposition which counted both active and inactive players and even empty chairs and was of no real use for practical play.
elapsed1970	time in seconds since 1970-01-01 00:00:00 GMT (Thursday)	Removing the symbol elapsed1970 because there was no real use for it.
ncommoncardspresent	number of common cards present (normal or highlighted)	Removing the symbol ncommoncardspresent, because it was never implemented correctly, but always had the same value as ncommoncardsknown. Furthermore its value would only differ at some casinos and at showdown (highlighted cards / bad scrapes), but this point of time is pretty meaningless for both OH-script and OpenPPL, which evaluate mainly on the users turn, whereas DLLers still have access to all info.
ac_pf_bets	no callers or blinds only called Pot – 1 bet to call raised Back – 1 more bet to call because someone behind you raised after you’ve already bet/called/raised raised Pot – 2 bets to call reraised Pot – 3+ bets to call 1.1. Only valid when betround == 1	Removed the symbols ac_pf_bets, because it was for fixed limit only, worked only on the first orbit preflop, because that task can be done with other symbols and finally we have the OpenPPL-library, so there is really no longer any need for that.
ac_aggressor	which chair was aggressor (might be from previous round)	Removed, as it was duplicate functionality to raischair
nplayersblind	number of players blind (including you) (0-10)
1-2 nopponentsblind	number of opponents blind (not including you) (0-9)
1-2 playersblindbits	bits 9-0: 1=blind 0=not blind
1-2 opponentsblindbits	bits 9-0: 1=blind 0=not blind
1-2 bblindbits	bits 9-0: 1=big blind 0=not big blind
ron$ / run$ symbols	These symbols report the total number of possible river endings for the opponent (ron$) and the user (run$). A value of zero means that type of poker hand is not possible. Any non-zero value means that type of poker hand will be seen that many times
1-2 ron$royfl	river opponent number : possible royal flush
1-2 ron$strfl	river opponent number : possible straight flush
1-2 ron$4kind	river opponent number : possible four of a kind
1-2 ron$fullh	river opponent number : possible full house
1-2 ron$flush	river opponent number : possible flush
1-2 ron$strai	river opponent number : possible straight
1-2 ron$3kind	river opponent number : possible three of a kind
1-2 ron$2pair	river opponent number : possible two pair
1-2 ron$1pair	river opponent number : possible one pair
1-2 ron$hcard	river opponent number : possible high card
1-2 ron$total	river opponent number : sum of all possible river endings
1-2 ron$pokervalmax	the maximum possible pokerval for the opponent
1-2 ron$prnuts	opponent chances of hitting the nuts on or before the river
1-2 ron$prbest	opponent chances of hitting pokervalmax on or before the river
1-2 ron$clocks	total number of cpu clocks used to calculate the ron$ symbols
1-2 run$...	similar like the ron$symbols above, just for the user

Some supporting functions and symbols for the PrWin-simulations got renamed in OpenHoldem 4.0.0 to achieve more verbosity and better formula-grouping in the editor.

Former Name	New Name
f$P	f$prwin_number_of_opponents
NIT	f$prwin_number_of_iterations
f$topclip	f$prwin_topclip
f$mustplay	f$prwin_mustplay
f$willplay	f$prwin_willplay
f$wontplay	f$prwin_wontplay