Knotwilg wrote:Uberdude wrote:BTW, when Mateusz Surma (now 1p EGF) was studying in a Go school in China he did problems with yose calculations down to 1/48 of a point: http://mateuszsurma.pl/en/2016/04/15/sc ... 5-04-2016/ I think it quite likely Japanese pros of the 1970s study in a different way to kids aspiring to be pros in a go school in China in the 2010s.
OK. So pros know about fractions and use them to calculate positions in problems. The question is: do they use them nowadays in their decision making? Do they effectively, in the late endgame, rank moves according to these calculated values? Given five or more moves to evaluate, I would think they need to know these values by heart. Nothing is impossible, in a mankind where already three centuries ago professional composers could make a composition for an orchestra without ever hearing it elsewhere than in their head. But do they? Or will they calculate these >5 moves on the fly? Or will they intuitively prune it down and choose the one with the highest winning probability, including the effect on neighboring positions and potential ko?
1/48 = (1/16)/3. That indicates a depth of 5, including one ko. As a practical matter the sequence must almost be a one lane road. Remember, you have to consider the opponent's possibilities as well. To reach a depth of 5 in every branch requires evaluating something like a minimum of 32 positions, assuming only one choice for each player at each turn! If you assume only two choices for each player at each turn, we are up to 4^5 positions, or 1024 positions!
No puedo, señor! (OC, several positions will be duplicates, but still!)Remember, the deeper you go, the more the uncertainty. Unless the positions are special, a precision of 1/48 pt. is swamped by the noise.
