入正题前，先推荐一家我经常去的在线扑克室，这是家老牌的中文扑克室，人民币美元存取方便，在线网银银行卡信用卡都可以，安全无风险，国人口碑一直都很好。而且现金桌的玩家都玩得比较松，很鱼，很好打。还有大量真钱免费比赛，经常有大型比赛，奖金丰厚，专职混比赛能月赚几万几十万。

贴个详细介绍：大发在线扑克室_大发体育

帐户注册地址：https://www.dafabet.com/sc/join?btag=613426

（送20%周存红利，每周最高200美元）

网址打不开请使用日本或加拿大、澳俄德等代理。

注册后下载扑克软件，安装运行即可游戏，登录时要注意用户名为大写。

这家扑克室免费比赛很好打，上去赚点生活费不是问题。 如果玩现金游戏不懂得如何存款，可以咨询在线客服，他们都很热情给你解答。

我里面的ID是：feiyun88 一般混10/20$现金桌，大家大可以来找我交流切磋，一起来杀外国鱼。

入正题：

An equity model is a method for estimating players’ equities, given the current chip stacks. In just a second we’ll introduce the Independent Chip Model, or ICM, the equity model which we’ll be using throughout this book.

Why does equity modelling matter more for SNGs than MTTs?

SNGs and Multi-Table Tournaments, or MTTs, are just different varieties of tournament. Equities could be produced for MTTs using the ICM, although the sums would be much more complicated. However, the differences between cash games and tournaments are more pronounced in SNGs than they are in MTTs, for two reasons:

Harsher bubbles in SNGs

The jump from fourth to third place in an SNG is 20% of the prize pool, a huge change in fortune which often has a dramatic effect on the correct play. No MTT has a bubble with that extreme a jump.

Payout structure

The top 30% of players in SNGs are paid. MTTs typically pay out to only the top 10-15% of finishers, with the top 5% collectively getting about 75% of the prize pool. This makes the MTT prize structure a lot more top-heavy. The more top-heavy a prize structure, the more the tournament should play like a cash game. Winner-take-all tournaments play almost identically to cash games.

Conclusion

In MTTs, equity modelling is both more complex to do mathematically and harder to intuitively approximate at the table, because payout structures differ so widely. Because using an equity model often doesn’t affect the correct play in MTTs, most authors of books about no-limit tournaments have chosen to ignore equity modelling and use simple pot odds calculations.

This won’t do for SNGs. Pot odds calculations often give answers which are wildly wrong, especially on the bubble. Using an equity model like the ICM is essential.

The Independent Chip Model (ICM)

The ICM is an equity model that works well for SNGs. This section describes the method used to calculate equities in the ICM. If you would prefer to think of it as a magic box where you put the current chip stacks in and get equities out, that’s fine – skip to the section on ICM tools.

Suppose in a standard SNG, three players remain - A, B and C – with stacks of 10000, 6000 and 4000 respectively. We assume that all players play with equal skill. The process starts by assigning them a first place finish probability equal simply to the percentage of total chips in play contained in their stack. So:

A: 50%

B: 30%

C: 20%

Now we take each of those possibilites in turn, and mentally eliminate the player from the game, leaving two players. Then we repeat the original process for second place. So taking A first, if we eliminate A from the game, that leaves stacks of 6000 and 4000, with 10000 total chips. That means that along this branch, B finishes second 60% of the time and C 40% of the time. However, we want to know the probability of this finish sequence as a whole. A only finishes first 50% of the time, so to get the overall probability, we need to multiply the B and C second place finishes by 50%, giving:

---------------------------

其实大概也就这样，有空可以到我上面介绍的大发扑克室找我交流切磋，我带你们打比赛。