Post
Topic
Board Service Discussion
Re: Satoshi Dice -- Statistical Analysis
by
dooglus
on 31/01/2013, 20:37:38 UTC
Here's a summary of the recent big bets.  I wanted to see how s.dice made its money back.  The first line says "there were 17 winning bets of 10 BTC on lessthan 12000 and 125 losing bets with the same stake and target, making a net loss (for the player) for 506 BTC":

Quote
              wins                                                           losses
-------------------------------------------------  --------------------------------------------
count target  stake     profit      total profit   count target  stake    profit   total profit        net profit
-------------------------------------------------  --------------------------------------------     --------------
   17 <12000     10     43.35211333  736.98592661    125 <12000     10     -9.9505 -1243.8125        -506.82657339
    2 <12000     20     86.70472666  173.40945332      8 <12000     20    -19.9005  -159.204           14.20545332

   32 <16000     10     30.02646000  960.84672        77 <16000     10     -9.9505  -766.1885         194.65822
   14 <16000     50    150.13430000 2101.8802         30 <16000     50    -49.7505 -1492.515          609.3652

   18 <24000    100    167.01256666 3006.22619988     39 <24000    100    -99.5005 -3880.5195        -874.29330012
   19 <24000    150    250.51910000 4759.8629         52 <24000    150   -149.2505 -7761.026        -3001.1631
    2 <24000    200    334.02563333  668.05126666      6 <24000    200   -199.0005 -1194.003         -525.95173334
    2 <24000    250    417.53216666  835.06433332     19 <24000    250   -248.7505 -4726.2595       -3891.19516668

   84 <32000    100    100.38430000 8432.2812         72 <32000    100    -99.5005 -7164.036         1268.2452
   74 <32768    100     95.69950000 7081.763          82 <32768    100    -99.5005 -8159.041        -1077.278
-------------------------------------------------  --------------------------------------------     --------------
                                   28756.37119979                      -36546.605                   -7790.23380021
-------------------------------------------------  --------------------------------------------     --------------

The majority of the losses were on the lessthan 24000 bets.  Here are graphs of the probabilities of the number of wins for 3 cases.  In all 3 cases the actual number of wins is pretty far left on the graph:

stake 150 BTC, target <24000,  71 bets, 19 wins,  52 losses:



stake 250 BTC, target <24000,  21 bets,  2 wins,  19 losses:



stake (all 4 stakes), target <24000, 157 bets, 41 wins, 116 losses:



Incidentally, how's the font look in the table inside the 'quote' above?  It's much easier to read than the one I usually use, but does it show up well for you too?