Life In 19x19

DH records
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Author:  dhu163 [ Wed Jan 01, 2020 7:09 am ]
Post subject:  Re: DH records

Unbelievably, I won the London Open!

Here are my game records. I've only added a few comments and haven't checked with AI yet. My memory is not so good anymore so I have recorded the ko fights and endgame in the wrong order.

2019 London Open 1.sgf [5.27 KiB]
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2019 London Open 3.sgf [2.99 KiB]
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2019 London Open 2.sgf [5.19 KiB]
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Author:  dhu163 [ Wed Jan 01, 2020 7:11 am ]
Post subject:  Re: DH records

2019 London Open 6.sgf [3.03 KiB]
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2019 London Open 5.sgf [3.26 KiB]
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2019 London Open 4.sgf [2.48 KiB]
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Author:  dhu163 [ Wed Jan 01, 2020 7:12 am ]
Post subject:  Re: DH records

2019 London Open 7.sgf [2.31 KiB]
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Author:  Uberdude [ Wed Jan 01, 2020 9:11 am ]
Post subject:  Re: DH records

The 89 "probably better" vs Podpera was the one I was talking about (as I think centre access more important than one stone half-captured). But on further inspection even better is j6!

Author:  dhu163 [ Mon Jan 20, 2020 1:18 pm ]
Post subject:  Re: DH records

I went to the 3rd European Grand Prix Finale in Leksand, Sweden last week, having been told I qualified with my London Open result, despite never hearing about it before. I was excited to meet and play against European pros for the first time even if I expected to lose all my games.

However it seems my results were the talk of the tournament as no-one had heard of me before and it didn't seem to fit my 4d rating. Beating two European pros surely trumps winning the London Open! It is unbelievable I finished 4th/16 in a field of 6d-3p.

Game 2 is the only game that wasn't live-streamed, and I've added a few comments and variations overall.

Games 3 and 5 were reviewed on Twitch

2019 Grand Prix 3.sgf [30.72 KiB]
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2019 Grand Prix 2.sgf [3.7 KiB]
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2019 Grand Prix 1.sgf [13.77 KiB]
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Author:  dhu163 [ Mon Jan 20, 2020 1:21 pm ]
Post subject:  Re: DH records

2019 Grand Prix 6.sgf [23.91 KiB]
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2019 Grand Prix 5.sgf [6.8 KiB]
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2019 Grand Prix 4.sgf [10.82 KiB]
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Author:  dhu163 [ Sun Sep 20, 2020 2:58 pm ]
Post subject:  Re: DH records

I won the corona masters league B of 5d european players, but have lost all my league A games (EGF academy) so far. not so great.
I just played katago on my home PC, with 20 playouts per second and 10 seconds per move. I won a 5 stone handicap game where I was scared for the life and death of a big group of mine for most of the game, trying to make eyes while being chased into the centre, but analysis says I was leading by 30 points and eventually kg overplayed trying to kill after I made a ko for life and it ignored my ko threat and I killed a big surrounding group. Then I wanted to try an even game, below. lost by 18.5 points (I can win the last point ko) which isn't so bad. :)

This is somewhat surprising considering my long losing streak (20 games ish) to bots on kgs. but its probably because the game entered endgame very quickly with no fighting, and the low numbers of playouts. The majority of the margin was lost in the endgame. I'll probably try again more in future

it says leelazero, but I changed the engine to katago 1.4.5 40 block

katago training 1.sgf [107.97 KiB]
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Author:  Marcel Grünauer [ Sun Sep 20, 2020 3:10 pm ]
Post subject:  Re: DH records

About move 35, the solid extension at D8 after White attaches and draws back - this is the second time I've seen this move. Instead of this move, I know the solid connection at C9 and extending up at E9.

I think C9 doesn't give White a good move on the second line, but it's weaker towards the center. And E9 is strong in the center but leaves a cut at C9 or an attachment at B10.

But under which circumstances is D8 a good move? It still leaves the attachment at B10 and is also less strong towards the center. It does make a tighter connection to the wall below but was there a danger of White invading inbetween?

Thank you.

Author:  dhu163 [ Sun Sep 20, 2020 6:31 pm ]
Post subject:  Re: DH records

D8 was a move i've seen AI play, but in this case kg said it wasn't good and C9 or E9 were good. if E9, i know that black normally has to sacrifice if white cuts even with the big wall, even if the stones were one space closer to the wall, but it might be marginally different when the cutting point is at F4 rather than E4.

D8 was played by AI when black's wall was just with E4 extend and white keima F2. The key is to defend the central weakness with one move and not give the opponent ways to make shape while reducing black's area whether in the centre or side. It is more a move to make life cleanly.

presumably its overconcentrated in this game and hence a bit too gote. This maybe means both that it was more valuable for black to spend more moves to secure the territory and also that if white got moves to reduce (the centre vs C9 or the cut if E9) then black at least didn't have to worry about the safety of the group. In the game it felt noticeably worse than either C9 or E9 especially when I connected up to the upper left and when white clamped in the lower left, but perhaps that is just because KG played to counter it and make it look bad. D8 itself lost only a little from the analysis. In conclusion, I suspect that D8 looks good if black can get the B3 hane or something like that, or if the C12 group is weak.

I found it interesting how powerful G3 is against the white wall on the right, even though KG didn't suggest it in this position, it didn't lose points either. my direction in the upper right however was judged incorrect and I should have taken sente blocking on the other side to attack with the cut in the lower right, since I had already set it up with G3.

Author:  dhu163 [ Mon Sep 21, 2020 5:04 am ]
Post subject:  Re: DH records

I won a 2 stone game, but the AI played so many bizarre moves that aren't at all suggested by KG or leelazero, so I wonder if I've somehow messed up the settings and it is a weak leelazero playing in disguise? Does anyone know how the lizzie AI works?

katago training 2.sgf [7.89 KiB]
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Author:  Marcel Grünauer [ Mon Sep 21, 2020 5:26 am ]
Post subject:  Re: DH records

I don't know how Lizzie uses the AI, but I prefer playing AI using Sabaki. You can configure multiple engines (e.g., using different configuration files) and in its Engine Sidebar you can see the GTP dialogue. After starting an engine, you can set it as the Black player, White player or Analyzer. I just find it more transparent than Lizzie.

Another interesting option is to play against Golaxy on (not :) ). After registering you can play against one of 37 levels; the kyu levels are somewhat erratic but the dan levels look rather human-like (now that humans strive to play exactly like an AI anyway).

Author:  dhu163 [ Mon Sep 21, 2020 11:51 am ]
Post subject:  Re: DH records

I've just tried out sabaki, but it doesn't seem to allow me to play against AI. When i do F5 as in the tutorial, it is always engine vs engine even when I set the players. furthermore when I ask the engine to make a move, it can play on where a stone has already been played or other bizarre moves, and most of the time plays the move in the position two moves before the current leading to many new branches of a game ...

so I thought I would use lizzie still, with suggestions turned off, but using analysis mode so that I am sure it is katago. I gave kg 10-30 seconds at 20 playouts/seconds

so vs katago 1.4.5 40s509 (40 block) for real this time. I lost by 11.5 in a 2 stone game. It felt worse than that, but I guess I lived with my main groups. I didn't do a good job in the opening, which felt like my main problem this game. my supposed attack ending up leaving all my groups weak

also, I finally won a league A game, killing a big group in my opponents area, when they had played too many (4 ish) 2nd line moves to reduce my moyo.

katago training 3.sgf [351.6 KiB]
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Author:  Marcel Grünauer [ Mon Sep 21, 2020 2:02 pm ]
Post subject:  Re: DH records

dhu163 wrote:
I've just tried out sabaki, but it doesn't seem to allow me to play against AI.

After setting up the engines (see hidden screenshot 1), I open the Engine Sidebar (from the Engines menu).

I create a new game with the desired number of handicap stones. (I don't change the player settings.)

At the top left of the Engine Sidebar there is a circle with a triangle. Clicking it lets you start the engine of your choice (screenshot 2). The engine appears underneath the circled icon.

I then right-click the engine line. In the context menu, I choose "Set as White Player" (screenshot 3), then "Generate Move". It makes a move and when you respond, it should automatically continue to make moves.

When I'm finished, I choose "Detach" from the same memu.

To analyze a position (Lizzie-style, with the blue move, green moves, percentages etc,) you can choose "Set as Analyzer" from the context menu.

This fine-grained control is also useful if you want to play against the AI from a given position. Just go to that position, choose "Set as White Player", "Generate Move" and have it play against you from that position.

File comment: Screenshot 1
sabaki-1-engines.png [ 71 KiB | Viewed 1068 times ]

File comment: Screenshot 2
sabaki-2-start.png [ 32.17 KiB | Viewed 1068 times ]

File comment: Screenshot 3
sabaki-3-set-player.png [ 84.43 KiB | Viewed 1068 times ]

Author:  Uberdude [ Thu Sep 24, 2020 5:52 am ]
Post subject:  Re: DH records

Glad to learn you are in the EGF academy. :tmbup:

Author:  dhu163 [ Wed Oct 21, 2020 7:53 am ]
Post subject:  Re: DH records

back in PETC
won my first game comfortably, added my short AI-less review, and also AI review which mostly supported some of my opinions on the mistakes we both made.

Pandanet 20-21 ETC 1.sgf [17.4 KiB]
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Author:  dhu163 [ Wed Nov 18, 2020 5:05 pm ]
Post subject:  Re: DH records

So far, I've only added (lots of) kg's variations in the opening at around 1k playouts

edit (20201121): updated sgf with variations at 100k playouts. I found bteuber's google cloud shell code to run leelaz on cloud gpu. It works very nicely and I even added my own code to make it work with the latest katago (on my github dhu163). It costs around £0.70 per hour.

Pandanet 20-21 ETC 2.sgf [38.4 KiB]
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