Life In 19x19http://lifein19x19.com/ Antti Törmänen’s second book ’Rational Endgame’ publishedhttp://lifein19x19.com/viewtopic.php?f=17&t=16567 Page 2 of 2

 Author: Bill Spight [ Fri May 03, 2019 9:08 am ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe lichigo wrote:Thank you for the answers, I'm consider to buy endgame 2 values to learn more about it. At the moment I'm not fully understanding the difference but in some parts I do. Could you show some real examples (diagrams) of real difference between the 2 ways ?The diagrams make little difference. The difference comes when you try to do arithmetic with the values. That works with gains, but not ordinarily with swing values. Most of the time, people are content with simply comparing the values of two different plays. But where they get confused is when they try to add and subtract values. The example with the 5 dan illustrates that. Or suppose that someone counts the game and finds that they are 3 pts. behind on the board, but they have a play with a swing value of 4 pts. They think that by playing it they can win. Wrong! The gain is only 2 pts., so playing it leaves them 1 pt. behind.What you are asking is to show the confusion of the players. You can't do that just in a diagram, unless it shows playing mistakes caused by the confusion.

 Author: RobertJasiek [ Fri May 03, 2019 10:41 am ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe Imagine a simple gote with Black's move achieving the count 1 or White's move achieving the count -1. (Exercise: put this on the board.) The initial position has the count 0.Modern endgame theory: each move gains 1, which is the move value.Traditional endgame theory: the move value is 2. Gains were neglected but if we considered them, we would find that they are inconsistent with the move value.

 Author: lichigo [ Fri May 03, 2019 11:59 am ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe Thank you, gonna buy your book for more studies ^^

 Author: Pio2001 [ Fri May 03, 2019 4:55 pm ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe Kirby wrote:Anyone care to comment on how they like the book? Good buy?I've got both Antti Törmänen's Rational Endgame and Robert Jasiek's Engame 2 - Values. But I am still completely confused with the theory in them.I can understand what happens with double gote moves, but the rest is still above me.

 Author: Kirby [ Fri May 03, 2019 6:10 pm ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe I’d say I don’t actually have much practical experience in the endgame. Many of my games are decided by resignation. I guess I could think about move values before then, but I’m too busy trying to read variations.Then again, maybe I’m just making an excuse not to learn the math.

 Author: RobertJasiek [ Fri May 03, 2019 8:47 pm ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe How about reading the books slowly and taking your time? Endgame evaluation is not like most other go theory but we must learn its own conceptual framework from scratch. If you find simple gote easier than other types of local endgames, this may be because simple gote depends on only two follow-up positions while other types depend on more. Understanding more can be more difficult than understanding two so be patient with yourself.

 Author: Bill Spight [ Fri May 03, 2019 8:48 pm ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe Kirby wrote:I’d say I don’t actually have much practical experience in the endgame. Many of my games are decided by resignation. I guess I could think about move values before then, but I’m too busy trying to read variations.Then again, maybe I’m just making an excuse not to learn the math.The purpose of the math is to make reading easier.

 Author: yakcyll [ Sun May 05, 2019 3:20 pm ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe Bill Spight wrote:Kirby wrote:I’d say I don’t actually have much practical experience in the endgame. Many of my games are decided by resignation. I guess I could think about move values before then, but I’m too busy trying to read variations.Then again, maybe I’m just making an excuse not to learn the math.The purpose of the math is to make reading easier.Personally, I don't think it makes reading easier; more like it dispenses with reading in favor of 'preparing' the endgame before the game begins in the form of analyzing and remembering particular formations and their values. I'm starting to believe that this is the way to go about it, given how complex some positions can be. If I got it correctly, Antti seems to share this sentiment when talking about finding the compromise between precise counting and managing time during tournament games. Calculating and manipulating a tree of formation-value pairs during a match doesn't quite strike me as natural.

 Author: Bill Spight [ Sun May 05, 2019 5:30 pm ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe yakcyll wrote:Bill Spight wrote:Kirby wrote:I’d say I don’t actually have much practical experience in the endgame. Many of my games are decided by resignation. I guess I could think about move values before then, but I’m too busy trying to read variations.Then again, maybe I’m just making an excuse not to learn the math.The purpose of the math is to make reading easier.Personally, I don't think it makes reading easier; more like it dispenses with reading in favor of 'preparing' the endgame before the game begins in the form of analyzing and remembering particular formations and their values. I'm starting to believe that this is the way to go about it, given how complex some positions can be. If I got it correctly, Antti seems to share this sentiment when talking about finding the compromise between precise counting and managing time during tournament games. Calculating and manipulating a tree of formation-value pairs during a match doesn't quite strike me as natural.Precise calculation of average values of complex positions is for analysis. During play I do not recommend that amateurs strive for more accuracy than ¼ pt., as a rule. Yes, situations do arise where the players can recognize that a very small difference matters, or may matter, and can do the math over the board. If precise calculation mattered much, you would not see so many math mistakes in endgame texts, Tormanen's and Jasiek's books being exceptions. But if the calculations did not matter, you would not see them in endgame texts at all. Besides, there is more to endgame math than calculating average values.

 Author: RobertJasiek [ Sun May 05, 2019 9:48 pm ] Post subject: Re: Antti Törmänen’s second book ’Rational Endgame’ publishe If values are very different, the larger ones are obvious and calculation is not needed. If values are similar, calculation is necessary to decide them. This is often so because there are many local endgames and similar values can occur easily.I have often reflected whether approximation might be useful for rather similar values but I have almost always come to this conclusion: It takes more time to verify that an approximation is correct, applicable and does not create mistakes in decision-making than it takes time to calculate precisely. If approximation rounds to, say, 1/4 and allows 1/4 point mistakes, this is unacceptable because they are too large by far as they can accumulate over the very many endgame moves. Verifying which rounding to the nearest 1/4 is correct is hard. Rounding to integers might be feasible concerning time-consumption but is totally useless imprecision whenever similar values are involved. Instead of searching excuses allowing approximation, it is better to practise correct calculations with fractions and accelerate them.There are situations for which values replace reading and others for which values very greatly simplify reading. Reading does not become superfluous but, in general, values very much accelerate reading.EDIT: The middle game is different. Endgame values or positional judgements can often be rounded to, say, 1/2 because many other imprecise aspects, such as fighting or influence, also have an effect on decisions. However, when everything compared is local endgames characterisable by values, then approximation is dangerous.

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