Thanks for posting this.
I'm wondering about the direction of attack on the K14-N14 white stones. At 45 my instinct would rather be to put pressure on them from the K12 area to try and build the bottom/center. At 49 I'd rather play M12 to isolate the two stones while still helping the right side group. What do you think?

Mine too! I thought attach was probably bad and small scale when I played it, and knew that extend instead of hane for his reply was likely a good answer. LZ agrees with k12. I don't really know why I play moves I know are probably bad: hoping he hanes, being a chicken over the cuts? 43 should be q11 turn earlier. Reviewing it with my 1d wife she exclaimed on that move "Oh no, why did you play like me? I think you are better than that!". Maybe playing with her too much recently


I think I need to block there. Though Elf did show me an interesting idea following my L12 bluff which failed: save the L12 stone (with m11 atari and connect, k12 is too big for W to trade) and let w capture the m13 stone as it's only a false eye and B can stay connected around white and keep up attack.

Haha, that's a nice negative compliment, or positive criticism

Interesting. It seems indeed to be a better and safer way to isolate the white center stones than my immediate m12. Thanks!

Some of my games from the British Challengers' tournament a fortnight ago with some comments and LeelaZero review.

Reviewed this game with Pavol Lisy 2p at the event, LZ after


I did put in some variations in Lizzie but didn't realise it only saves mainline!


Have just downloaded GoReviewPartner, will give that a go on some other games.

I just beat LeelaZero #145 on even first time! 2 seconds a move for the bot so that's about 1k playouts, it missed a ladder.

LOL! Andrew, you bought a nice new machine with a good graphics card so that you could restrict you opponent to minimal playouts and exploit known weaknesses?

_________________
Dave Sigaty
"Short-lived are both the praiser and the praised, and rememberer and the remembered..."
- Marcus Aurelius; Meditations, VIII 21

Hey, I just used the defaults in Lizzie! And actually I think 1000 playouts is not so small: some guy on reddit is doing tests reducing LZ's playouts to get about even results vs Leela 0.11 (6d+) with unlimited thinking time and is currently down to only 55 playouts. Plus when I was reviewing my tournament games with my laptop its 1 playout instinct was often better than our moves, and with a few hundred seemed plenty stronger than us. But yes I am smarter than Leela 0.11 in knowing LZ has ladder problems so intentionally gave it opportunities to mess up.

My game against Shi Yue 9p from the 5th World Collegiate Weichi Championships / Changqi Cup in Cambridge last week (record a bit wrong at end but yes I did blunder die; had to hurry up as last to finish).



Pics: https://www.facebook.com/photo.php?fbid ... ater&ifg=1

Nice game! You seem to be a few points ahead if you live on the left.

How did the other strong amateurs do in the handicap simultaneous games?

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Sorin - 361points.com

Yes, it was pretty painful losing all those points in the lower right (too much fighting spirit with g4, and not defending at s3 when I had the chance) but I had hung on to just enough. At the end I overlooked that making the e9 d9 exchange meant c6 was no longer sente so I had to live differently. I don't really know why I kicked and invaded at h17 seeing as I expected his h16 tesuji and had no good answer planned; took me a while to get into the game. The centre fighting was fun, seeing as Shi Yue is one of the strongest fighters in the world I wanted to fight against him rather than play some passive "preserve my handicap" style. I reviewed a bit with LZ, it said I basically maintained a >90% winrate all the way to the blunder, but winrate is not so useful for reviewing handicap games as in the opening 4 handicaps is ~50 points lead and given as 96% win, whereas nearer the end of the game 96% winrate could mean a sure lead of 3 points. Really what I want is a points lead graph showing my gradual (or not for big mistakes!) erosion of the 4 stones advantage as the game progresses. There is a "handicap-instead-of-winrate" setting in the lizzie config, I'll give this a go later.


I only know Daniel Hu lost on 3 stones to Tuo Jiaxi, and Amir Fragman lost to Mi Yuting (don't know handi). Here you can see Laurent Heiser's game in progress

I won the first game of the 2018 British Go Championship yesterday against Sam Aitken 4d. A little bit of AI influence (press bigger than double approach to 4-4) but no modern 3-3 invasions and then a fairly traditional looking game. I did better in opening and early middle-game, messed up in middlegame and was behind losing a bunch of stones. Some sloppy endgame play from both of us meant we each had chances but in the end I came out ahead by (my now traditional title-match score of) 2.5 points. (o11 connect is losing move if I connect at p11 (he should peep inside to get the 1st line sente yose), then o13 is losing move as p13 wedge works due to me not playing p11 and is a few points better.)



Commentary by Matthew Macfadyen 6d:

Some comments.



LZ's winrate of the game with move numbers of key moments marked:

An LZ review of an old OGS game of mine which copied a pro game and I diverged when I successfully identified the pros mistake (and my opponent then kindly made lots more).

I was the British player at the 13th Korea Prime Minister's Cup in Buan, South Korea 2 weeks ago. I had a good time meeting old and new friends and played fairly decent Go given my worries about the short time limits (40 mins and 30 seconds 3 times) and ended with a decent 18th place and 4 wins (thanks to somewhat lucky pairing like WAGC 2 years ago: bye 4d- 1d+ (US)6d+ 1d+ 5d-). Here's my report for the BGA: http://britgo.org/news/2018/kpmc. I plan to review my games later, but for now here's a video of my final game where I blew a kill against Czech Radek Nechanicky 5d and a surprising chance to finish in the top 10 (losing early seems to be the way for not so strong players like myself to do this).



And here's a simul game where I worked hard (making a shocking broken shape) to kill Oh Yujin 6p on 2 stones but then missed the final blow (actually Blackie came over and commented how I was trying to kill her which made me lose self confidence, should ignore kibitzers!). Had a nice review with Rob van Zeijst and some strong Taiwanese guy afterwards.