bjstrat's Composition Dependent Analyzer (cdca) accuracy?

Hi, I cannot link it due to being a new user, but the site is called bjstrat.

How accurate is it? Reason I'm asking is that it displays the player having a 0.0243% edge over the casino with 1 deck, no DAS, no surrender, no re-splits.

It also appears to overestimate the EVs when picking 8 decks, -0.607% EV, when the casinos with these rules themselves claim a 0.72% house edge. On providers that offer DAS & list a 0.56% house edge, bjstrat says 0.486% house edge.

Am I missing something? And if not, is there a more accurate one out there?

Thanks.

Here's the link:

bjstrat CCA

Thank you for pointing this out. I have extensively used the bjstrat composition dependent combinatorial analyzer for more than 10 years and it has always been highly accurate. The bjstrat CCA's results were used by the programmer JB as the gold standard for QA purposes when he programmed the WOO site's composition dependent BJ hand analyzer.

But I now see changes to the calculator:

- The player's EV is now formatted differently, it now is a white font on a black or red background. Previously, it has been black font on a white backgroumd.
- The "compute mode" for basic strategy now is functional; it previously gave the same result for "optimal strategy" and "basic strategy"
- Some of the outputs are incorrect, as you have flagged in your post.

It seems clear to me that after a decade of neglect someone is tinkering with the underlying software.

The WOO site has a similar composition-dependent BJ hand calculator: WOO BJ hand calculator It shows player EV for the decision options to more significant digits than bjstrat.net but does not display the dealer's probabilities in the way that Bjstrat does.

Thanks for the response. Is it possible to see the EV before any cards are dealt with the WOO one? It seems I have to feed it cards to then see the EV for each option of that one hand, as opposed to being able to see the general EV with a specific deck composition.

I believe all the discrepancies between different blackjack calculators lie in the part that involves pair splitting decisions.

Quote: qwertq

Thanks for the response. Is it possible to see the EV before any cards are dealt with the WOO one? It seems I have to feed it cards to then see the EV for each option of that one hand, as opposed to being able to see the general EV with a specific deck composition.
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The outputs for the WOO calculator are very limited compared to Bjstrat. It doesn't do the total player Ev for a specific deck composition.

I compared both calculators. The Bjstrat calculator is missing the comparison between “after the dealt” and “before the dealt” deck compositions.

Where do you see it display the house edge (player edge)?

I've been trying to replicate the WOO hand calculator for my set of rules and am also ending up with a positive player edge and I've been wondering what I've been doing wrong.

I actually used the Shackleford spreadsheet he made for infinite decks and modified it slightly for my local rules and I'm ending up with a player edge of 0.0224% which obviously didn't pass my sanity test.

Would love for someone out there more mathematically gifted to help me out. If they could actually help me build the action EVs for each hand for the set of rules I'm concerned with (slightly different from what's available at WOO calculators) I'd be willing to pay.