xela wrote:
Earlier, I'm pleased to find that I seem to have learned something from Genjo-Chitoku: I was able to recognise
as creating
momentum for
(although KataGo isn't overly impressed by
and prefers a pincer for once).
Remember that the value of pushing or jumping through an opening is as a rule better the smaller the opening is. Jumping through a 5 space opening is not a big deal. In fact, for
Elf prefers the jaw jab at R-10 by 3½% to the jump. Curiously, Elf prefers the jump for
, but only by 1% over the kick.
xela wrote:
But for me the most surprising move of the game was
.
- Click Here To Show Diagram Code
[go]$$Wc
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . O . . . . . . . . . . . |
$$ | . . . O . O . . . . . . . . . . O . . |
$$ | . . O . . O X . X . . . . X . X X . . |
$$ | . . O X . . X . . . . X . . . . X . . |
$$ | . . X . . . . . . . . b . . . O O O . |
$$ | . . . X . . . . . . . . X . X . . . . |
$$ | . . . . . . . . W W W W X . . . O . . |
$$ | . . . . . . . . W X X X O O O O . X . |
$$ | . . . . . . . . . . . . X . X . . O . |
$$ | . . X . . . . . W . X . X . . . . O . |
$$ | . . . . . . . . . . . . . . X X X X . |
$$ | . . O . X . . . . . . . O O . O . . . |
$$ | . . . a . . . . . . . . X O . . . O . |
$$ | . . . . . . . . . . . X . X . O . . . |
$$ | . . . O . . . . . X . . X . . O . O . |
$$ | . . . . . . . . . . . . X . X X O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
I thought a move to strengthen the centre group was pretty much essential at this point. But no, Otake fearlessly played
a! KataGo does indeed prefer a move in the centre (and has several suggestions, not a single clear favourite), but thinks that the game move is still playable (white's lead drops to 2 points). In many variations, white has
b as a saving move.
Elf also prefers to play in the center rather than at
a. In fact, it prefers
b over
a by 15½%.
xela wrote:
That
is a "+11% move" for my KataGo 1.3 setup. That is, KataGo doesn't find the move, but when I put it on the board, the winrate is 11% above KataGo's first choice. Also,
is +8% (KataGo just looks at the clamp instead), and
is +4%.
FWIW,
is Elf's top choice, with 31.6k rollouts, and for
it prefers the push through at D-11 with 61.5k rollouts, but only by 0.1%, i.e, not really at all. Since
gets only 3 rollouts, it inherits its winrate estimate from
, which is also Elf's top choice, with 21.7k rollouts. As mentioned before,
was not Elf's top choice, but it gets a winrate estimate 13½% better for White than the top choice. OC, with only 1 rollout, it inherits its winrate estimate from
, also Elf's top choice with 14.2k rollouts.
xela wrote:
With these apparent blind spots, I agree that we can't trust KataGo's evaluations of other moves round about this part of the game. In particular, I don't think we can conclude that
is actually a blunder.
Well, Elf thinks that
loses 36% to par. Even if we think that its evaluations hereabouts are off by 13% in favor of Black, and if we assume that all the winrate difference between
and its top choice is explained by that amount and so subtract 13% from 36%, we still get a loss of 23%, which is still a blunder in my book. (We cannot conclude that
and
and their evaluations are blindspots for Elf, given its number of rollouts.)
xela wrote:
In hindsight, after seeing
I wondered if
was a mistake. But any alternatives appear to be even worse.
Is there a way to promote
in Elf's searches?