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#1
08-08-2007, 04:05 AM
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LHE Bankroll Calculator
I wrote a spreadsheet to convert a linear bankroll to a limit-adjusted bankroll, so that you can see exactly how many BB you have before going broke provided you move up and down in limits religiously.
http://www.chrisdanek.com/limit_bankroll_calculator.xls (right click, save as). I spent some time thinking about bankroll management and starting requirements for those seeking to grow a bankroll quickly and are willing to move up and down. For example, if you wish to assume a bankroll buffer of 500xBB and start with $1000, typically we would simply say to play 1/2. However, if you did start out playing 1/2, you'd actually have over 500xBB as when you hit $500 (in your downswing of 250xBB) you could move to $.50/$1 and still have 500xBB. That'd be a 'padding' of 750xBB before you went broke, which was a bit more than you wanted initially. In fact, if you wanted to move up and down limits but have to actually lose 500xBB at the limit you were playing before you went broke (and, for the sake of simplifying, the smallest limit you'd play would be .5/1), you could maximize your limit by setting watermarks of: $0-268: $.5/1 268-536: 1/2 536-804: 2/4 804+ 3/6 How did I figure that out? Input $1000 into the spreadsheet and play around with the Buyin strategy (the two green cells) to find your appropriate "BB until we go broke" number. If we think about this, we'd see that we'd have 196 bucks to lose at 3/6 (about 40xBB), another 270 to lose at 2/4 (about 65xBB), another 268 to lose at 1/2 and .5/1 (134xBB and 268xBB), which adds up to about 500: 40 + 65 + 134 + 268. Naturally you can see that we don't have much padding at 3/6 and 2/4, but this works in our favor as well. Our next watermark is at $1340 which indicates we only need to make about 90xBB before we can actually move up to 5/10. Anyhow, I'm getting somewhat long winded here. I've made this spreadsheet for you limit holdem bankroll builders (the lowest limit I use is .5/1, sorry). All you need to do is fiddle with the numbers in green to see some interesting bankroll stats. 
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#3
08-08-2007, 07:29 PM
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Re: LHE Bankroll Calculator
Yeah, I didn't really do a great job of explaining this, but that's essentially the purpose: determining what limit to play (and what watermarks to change limits) given a starting bankroll and desired variance.
For example, if you have $1000, you don't really have 500xBB if you're just playing 1/2 since that implies you'd never move up or down. Moving up and down is trivial to do online, so with $1000, we can safely assume that's more like 750xBB (if we lose $500 at 1/2, we've lost 250xBB, and we move down to .5/1, in which we would need to lose $500 more to go broke, 500xBB, or 750xBB total). Basically it's a way for you to figure out what a gradient for game selection looks like. Assume you KNOW that you want to start with 800xBB (theoretically you shouldn't experience a downswing near there if you're a winning player), you can simply plug in your bankroll and it'll tell you what bankroll to play what limits. To elaborate a bit more, let's say we have $1000 and want to assume 800xBB of safety. Simply plugging $1000 into the spreadsheet, and fiddling the XBB number until we get 800 for "BB until we go broke", we see that the watermarks for games are: $.5/1: 0 $1/2: $600 $2/4: $1200 $3/6: $1800 So, if we have 0-600 we play $.5/1, if we have 600-1200 we play 1/2, and so on. With a starting bankroll of $1000, it will take us 800xBB to go broke (and we can see that pretty easily: if we lose 200xBB at 1/2 we're down to $600, and if we lost 600xBB at .5/1 we're down to 0). Furthermore, if we get above $1200 we could play $2/4. In practice, you'll want to get at least a buyin above the watermark before buying in, and you'll need to be rigid about the bankroll management, which most people aren't. That make more sense? I'm not really explaining this well, I know. [img]/images/graemlins/tongue.gif[/img]
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Linear Mode
