How we calculate

Every strategy chart on Blackjack Card Counting Trainer is standard multi-deck basic strategy for 4–8 deck shoe games, with the rule variations you can toggle: whether the dealer hits soft 17, late surrender, and doubling after a split. The dealer peeks for blackjack, as in US casinos.

The numbers on each hand page

The “by the numbers” tables come from our own calculation. For each play we compute the average result per $100 initial bet after the dealer has checked for blackjack, so the numbers reflect the decision you actually face. The model assumes an infinite deck, meaning every card has the same chance on every draw. That tracks a 6–8 deck shoe closely. Splits are modeled with doubling after the split allowed and no resplits.

We checked the model against the published chart in every cell. Under all eight rule combinations it picks the same play everywhere except two marginal soft doubles (ace-2 vs 5, and ace-4 vs 4 at stand-on-17 tables), where the finite-shoe effect is real and the chart’s answer is the standard one. None of our hand pages depend on those two cells.

What we don’t model

• Composition-dependent plays, where the exact cards in your hand matter (for example, a three-card 16 vs 10). We mention these in the text where they matter.
• Card-counting index plays. Where we cite a count, it’s the widely published Hi-Lo true-count index.
• Single- and double-deck games, which differ in a handful of cells.

Casino rules

Casino pages list each rule with its source and date, and say plainly whether it’s from the casino’s own site or a player report. Rules vary by table and change over time, so the felt and table placard always win.

Spotted something wrong? Rules reports with a date are the most useful corrections we can get.