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The arithmetic, written out

Three pieces on what the numbers in this product mean. The figures this project has misquoted before — the bankroll, the swing ratio, the hands per hour, the realistic edge band — are checked against src/engine on every build, so a sentence here and a reading on the screen cannot disagree about those. That check is deliberately narrow and does not cover every number on these pages.

• What a basic strategy chart is actually doing

  A basic strategy chart ranks losses, not wins. Where the hard 12 line falls, the three cells the soft 17 rule moves, and the rule set behind every figure.

  2,669 wordsabout 11 minutes

• Is card counting illegal? No. Here is what happens instead.

  Counting cards is not a crime in the US. What a casino may do instead, where devices and teams cross the line, and the arithmetic underneath.

  2,614 wordsabout 11 minutes

• What a Risk of Ruin Calculator Is Actually Computing

  Risk of ruin is one exponential. What it measures, why bankrolls are counted in bets not dollars, and the arithmetic behind 782.5 units for 5%.

  2,148 wordsabout 9 minutes