Lesson 11 – Evaluating Games
Última actualización: 18 de febrero de 2020While almost all Blackjack games are ultimately beatable, the rewards to be gained from marginal situations do not adequately compensate you for your time and risk. Therefore, you must evaluate a game in several ways before playing it. Two primary areas of concern are the house rules of the game, including the number of decks used and the placement of the cut-card, what we call “penetration.”
Many rule changes require a change in your basic strategy, so don’t forget about the “Basic Strategy Engine”. Remember that rule changes may also affect your betting schedule.
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Effect of Rule Variations on the Player’s Edge
(Assume 6 decks, double on any first two cards, no double after splitting, resplit all pairs, except Aces, insurance is available and the dealer stands on Ace-6. This yields a -.54% advantage to the player.)
| Changes which help the player | Change in the edge |
|---|---|
| Double after split | +.14% |
| Resplit Aces | +.07% |
| Early surrender vs. all | +.70% |
| Early surrender vs 10 0nly | +.30% |
| Late surrender | +.08% |
| Single Deck | +.50% |
| Two Decks | +.20% |
| Four Decks | +.05% |
| Changes which hurt the player | Changes in edge |
|---|---|
| Dealer hits A-6 | -.20% |
| Double only on 11 | -.46% |
| Double only on 10,11 | -.09% |
| Double only 9, 10,11 | -.09% |
| No resplitting pairs | -.04% |
| No insurance (if you are counting cards) | -.40% |
To determine the casino’s edge over you at the beginning of a shoe, just add or subtract the rules variations from the ‘base’ game listed above. For example, if you play a double deck game which has the same rules as the base game, the casino advantage is computed as follows.
Base game -.54%
Two Decks +.20%
_____________________
Player edge -.34%
Effect of Deck Penetration
How far the dealer goes into the deck(s) before shuffling can have a major effect on your winnings. The reason is that with a shallow penetration, the ‘high’ counts which enable you to bet more occur less often in decks where the shuffle comes early. The table below shows how often counts will occur on a percentage basis at varying degrees of penetration.
| Percent Occurrence at… | |||||
|---|---|---|---|---|---|
| Recuento real | 50% | 65% | 75% | 85% penetration | |
| +1 | 15 | 15 | 13 | 13 | |
| +2 | 8 | 7 | 8 | 8 | |
| +3 | 3 | 4 | 4 | 5 | |
| +4 | 1.5 | 2.5 | 3 | 4 | |
| +5 | 1 | 1 | 2 | 2 | |
| +6 | .5 | 1 | 2 | 2 | |
| +7 | 0 | .5 | 1 | 1.5 | |
| +8 | 0 | 0 | .5 | 1 | |
| +9 | 0 | 0 | 0 | .5 | |
| +10 | 0 | 0 | 0 | .5 | |
Let’s examine what I’m trying to say here. If you play at a game with only 50% penetration, out of every 100 hands, only 29 will have, on average, a true count of 1 or better. Since it requires a true count of 1 to get even with the house, only 14 will be hands on which you have an advantage. Now look at the stats for a game with 85% penetration. Here, about 37.5% of the hands will be at breakeven or better and almost a quarter will be hands on which you have an advantage.
YOU ARE WASTING YOUR TIME AND MONEY IF YOU PLAY AT A GAME WITH LESS THAN 65% PENETRATION.
Even if a game doesn’t offer the best rules, it can still be beaten if good penetration is available. Remember that you should leave a game when the count drops below a true of minus 1 so that you spend most of your playing time making bets in what I call the ‘profit zone.’
Deberes
Calculate the player starting advantage for the following:
- Single deck, double only on 10 and 11 and the dealer hits A-6. Resplits (except Aces) are permitted and insurance is available.
- Six decks, dealer stands on A-6, double any first two cards, double after split is allowed, resplitting permitted, including Aces and insurance is available.
- Two decks, double on any first two cards, no resplitting of pairs, no double after split allowed, late surrender and insurance is available.
I’ll post the correct answers to this quiz in the next lesson.
Hola Ken,
I like to play a game that is single deck – NDAS – H17 game. By all the calculators that I have found online, this game house edge hovers around .2%. However, it does not allow the player to take insurance. This is not an option in any of the online calculators that I have found. Your table states that with this condition I would need to adjust the house edge by -.4%. If this is the case, my bet spread has been very wrong as the player does not get the edge until a true 1.5. Can you shed some light on this? Thanks!!!
I believe the only game in the United States that fits this description is the tiny-stakes game at Barton’s in Jackpot. The house edge is 0.18. House edge is generally expressed as “off the top of the deck vs. basic strategy.” The lack of insurance does not affect it, as a basic strategist never takes insurance. As for Ken’s calculation for a card counter, it’s reasonable, making the Barton’s game only marginally playable for those who play tiny stakes, and very frustrating.
Thanks LV Bear, your response is super appreciated. I have a follow up question for you if you don’t mind. Since you should only be taking insurance at a +3 anyways and at a +3 in this game your edge is around 1.3%, would that take .4% off of your edge if and only if the dealer shows up with an Ace, bringing your edge in that scenario down to .8%? Just wondering how to calculate the game. I don’t want to make any assumptions. Thanks!
Please post the question in the “Card Counting, Advanced Strategies” section of the forums.
Do you have to remember the variations to players edge or can u just use a calculator to do so?
Lesson 11
Changes which hurt the player Changes in edge
Dealer hits A-6 -.20%
Double only on 11 -.46%
Double only on 10,11 -.09%
Double only 9, 10,11 -.09%
No resplitting pairs -.04%
No insurance (if you are counting cards) -.40%
And 8 Decks?
“YOU ARE WASTING YOUR TIME AND MONEY IF YOU PLAY AT A GAME WITH LESS THAN 65% PENETRATION.”
65% is the standard for ALL games, irregardless of the number of decks?
Enjoy reading and gaining more knowledge relative to
Playing a stronger game of blackjack.
Thank you for the good info.
ken I wish all the best 4 you in 2017 and just wanted to express a big thank you for your time and informations on bj !!!
Hello ken.any numbers of avantage of disavantage in european bj.the european no hole pick card for the dealer i think its hurts the players right?also a surrender offer in europe against all dealers cards except an ace before the dealer delt any card to the palyers its the same percent avantage like u have in usa for the full early surrender? Thanks for the answer!
European No-Hole-Card costs the player about 0.11%.
Since most of the value of surrender comes against the Ace, early surrender against any card except the Ace is less valuable. It adds 0.24%. (Full early surrender is worth 0.63% by comparison.)
Hola Ken,
Juego en un casino con las siguientes reglas (Quebec):
La tabla mínima es $20.
Natural paga 3 a 2
8 cubiertas
Penetración de 75% a 80%
El repartidor golpea 17 suave
Se permite doblar dos cartas cualesquiera
Doble después de dividir permitido
Sin rendición
Miradas de distribuidores
Seguro disponible en el dealer cara arriba A
División limitada a un máximo de 4 veces
No se permiten movimientos después de dividir Ases (stand,stand)
Si el crupier y el jugador consiguen un blackjack natural, la jugada es un push (No estoy seguro de esto último, puede que me equivoque y sigan pagando 3 a 2).
¿Cómo recomienda que superemos esta configuración?
Estas son las típicas reglas de 8 mazos. Recomiendo KO o Hi-Lo, con un spread de 1 a 12 o mejor. En el caso de apuestas mínimas, sería de $20 a $240, así que hazlo de $20 a $250. Necesitarás un banco de aproximadamente $25K para utilizar con seguridad ese diferencial. Si usted no puede permitirse ese nivel, usted necesitará backcount si es posible, o por lo menos dejar en la mayoría de las cuentas negativas.
Thanks for the reply, Ken!
These rules have been very discouraging! I’ll proceed with the Hi-Lo because I’ve been practising it with these rules for about a year now and I’ve developed a high degree of comfort keeping the running count and playing perfect basic strategy. Unfortunately, both playing sims at home (kitchen table style) and at the house, we seem to be on a downward & losing curve, but it’s difficult to judge because I don’t think we’ve reached the long run by far 😛
Luckily, I play with a team of 3 so back-counting might be viable 🙂 and the recommendation you’ve provided as far as bet spread and bank roll really puts things into perspective!
It’s too bad there’s not another table with different rules within 400KMs of where I live… the house we play at might have up to 3 different tables open at once but on the bright side, its a smaller casino and its a lot more calm than most.
Hola Ken,
I really love the site but there is something I cant really understand:
According to the table you get a true count of 7 or better a 0% of the time with 50% deck penetration. But in a single deck game if the first 7 cards dealt are low you already have count of a little bit over 7. So you clearly have a true count of 7 or better over 0% of the time. Is the table wrong or am I doing something wrong?
I suspect that the table assumes six decks. You are far less likely to reach TC+7 in a six deck game with 50% penetration than a single deck at 50% pen.
Hola Ken,
First let me say I have learnt so much from your website and I am using it to play online live with favorable results.
My question is, the site I play on go to about 65% penetration before using a new shoe, with an 8 deck game. Should I only play at the table when it is a new shoe? Or is it OK to join and play even if I estimate 2-4 decks in the discard pile?
Just like in a land-based casino, you can join the game at any time. Just consider the discards as if they were behind the cut card. An unseen card is an unseen card whether it was dealt before you arrived, or hasn’t left the shoe yet. Of course, joining a shoe in progress means you will get poor penetration on that first shoe, with a similarly lower chance of good counts arising. But there is nothing wrong with the prospect of joining mid-shoe.
Just want to be sure I understand . . . it is possible in a game with only 75% penetration (standard deck and half cut out from a six deck shoe) to have a true-count north of +9, right. It doesn’t happen that often but there have definitely been times when 1/2 of the six deck shoe has been cashed and the running count is 20 thus making the true-count – if I understand your teachings correctly – +10, right?
Make sure you are including the cards behind the cut card in your unseen decks. In your example, when we are halfway through six decks, that means 3 decks have been dealt, and 3 decks are still unseen. It doesn’t matter that many of the unseen cards will never be used because they are behind the cut card. You still use them in the calculation. So a running count of +20 would convert to a true count of +20/3, or +6.66. With the same true count one deck later (4 decks used, 2 unseen), the true count would by +20/2 = +10.
Dear Sir
I am 20 and I have just started playing blackjack. Your site has been extremely helpful, in the past two weeks I have gone through all the lessons and have done all the homework. I am counting five decks, ten times a day and I am also practicing game situations regularly. Tomorrow, I am hoping to try my luck at the local casino with my new knowledge. Now I think I can count without a problem at the casino because the dealers are extremely slow especially the ones covering the early shift. However, I would like to ask you a question about penetration which I am not certain of. Now the dealer at the casino puts the cards from the discard tray into the shoe after every hand so does that mean that to calculate my true count, I would always have to divide by five as they use five decks.
Please help me
I have bad news. The game you describe is using a continuous shuffle machine, which means that recently used cards can re-appear in the game immediately. Since the deck composition does not change over time as it does in a non-CSM game, this game cannot be beaten with card counting. You will need to find games that do not use a CSM to be able to count cards. (To specifically answer your question, you would indeed always divide by five, but you would also need to zero out your running count after each and every hand, because the entire five decks is essentially reshuffled constantly.)
Hi, Ken
I’m playing in a on line live casino. It is an european style, 8 decks, 80% penetration, S17, double only in 9, 10 and 11. Split only once. Double after split is not allowed. You can hit after split Aces. I type this data in the MGP’s software and the advantage is -0,63. Is it beatable if I play with TC>1?
Each point of true count is worth about 0.5%. So at a TC +1, the game is still negative at about -0.13%. If you were to play only at TC +1 or better, the good counts would be enough to offset the small losses that occur when the true count is exactly +1. So the answer to your question is yes, you could create a small edge by even flat-betting this game by playing only when the true count is +1 or better. If you spread your bets in higher counts, obviously you can improve your results a lot.
Me encanta su sitio y tutorial. He disfrutado mucho jugando al blackjack gracias a él. Sin embargo, estoy confundido o tengo un problema con una cosa. Dices que hay que retirarse cuando TC es -1. Si realmente me fuera, acabaría por no jugar nunca. -1 ocurre muy muy a menudo, no entiendo como esperas que la gente se aleje. Una vez fui al casino con mis amigos y ocupamos toda la mesa, así que pude sentarme en un montón de manos... cuando la cuenta era negativa, sin parecer sospechoso. Fue increíble. Pero no sé cómo hacerlo cuando juego sin amigos sin parecer sospechoso. ¿Puedes darme algunos consejos? Gracias
Creo que el consejo de GameMaster es poco práctico para la mayoría de los jugadores. Como usted nota, una cuenta verdadera de -1 sucede muy a menudo. Demasiado a menudo para que la mayoría de los jugadores quieran, o incluso puedan, cambiar de mesa.
Siendo realistas, cambiar de mesa en TC -2 sigue siendo difícil, pero manejable si estás en un casino con muchas mesas.
Si sigue siendo demasiado difícil, al menos reserve sus descansos para ir al baño cuando el recuento sea realmente bajo.
Muy bien, anotado. Al menos es una cosa menos de la que tengo que preocuparme. Gracias por una respuesta tan rápida.
Hola Ken
Tengo una pregunta acerca de qué cuenta es más preferido. Yo juego en 2 casinos uno de los cuales es 4deck con 75% penetración y el otro es 6deck con 85% penetración. Obviamente, el mejor casino para elegir es el segundo, pero mi pregunta es que yo uso el conteo Hi-Lo, pero algunos dicen que el conteo Knock-out es más preferido para los juegos de zapatos, incluso si se trata de un conteo desequilibrado, así que ¿cuál de estos 2 conteos es el mejor para estos 2 casinos?
El Hi-Lo me parece rentable y fácil, pero el conteo KO también me parece fácil, ¿tiene más éxito el conteo KO que el Hi-Lo en los casinos a los que asisto?
¿Tendré más éxito utilizando la cuenta KO en lugar de la cuenta Hi-Lo en esos casinos?
Ayuda, por favor 🙂 .
En partidas de 6 y 8 barajas, Hi-Lo y KO tienen un rendimiento casi idéntico. Cambiar a la cuenta KO más fácil no le costará nada.
Hola Ken,
I just started counting cards and i found 2 casinos with good rules but i don’t know which is better. In both casinos the dealer stands on S17, double on any 2 pairs is allowed, resplitting is allowed and after splitting aces you get one card and black jack pays 3:2. But the first one is an 8-deck with 85% penetration while the other is 4-deck with 65-75% penetration. Which one should i prefer?
The off-the-top difference between 4 decks and 8 decks is only around 0.1%.
Because the penetration is so much better on your 8-deck game, I would choose the 8-deck game for card counting.
(Just to be clear: Basic strategy players would be better off in the 4-deck game, since penetration doesn’t matter to them.)
Thank you very much Ken, love your website.
Dealer only has one card on table, player can surrender before the first third card deal out of the shoe.player can surrender on dealer’s ten but not A. so what is the advantage for player for this rule. if ES is +0.7%, what is the advantage for this kind of surrender?
Early surrender against the dealer ten is worth around 0.24%, instead of the 0.70% value of full early surrender.
Hola Ken,
I calculated my local casino edge based on the infor you give.
our rule is 6 decks, double on any first two cards, double after splitting, resplit all pairs, except Aces, insurance is available,dealer stands on H-17.
so my calculation is: -.54% -0.2%(H17)+0.7(ES)+0.14(DAS)=0.1% is this right? if it is right, does it mean player have 0.1% edge over casino?
thanks for all you have replied on other topic.
You are very unlikely to have a local game that offers EARLY surrender. It is probably LATE surrender.
Check your understanding here: Explicación de la rendición en el Blackjack