Life In 19x19

Posted: **Tue Sep 24, 2024 11:16 pm**

In game 127 (7 komi, NZ rules), white ends up in a single group, whereas black gets four corners and a two-point center dragon. (Not as clickbaity as my description of game 116!) Oh, and it's a draw this time. https://online-go.com/review/1081518

Click Here To Show Diagram Code: [go]$$Bc Move 62. $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X X O . . . . . . . . . O X X . . | $$ | . . X O O . . X X . . . . X . O X . . | $$ | . . X . . O O O O X X . . X O O X . . | $$ | . . . X . . X . . . . . . O O X X . . | $$ | . . . . . O . W . X . . . . . O . . . | $$ | . . . X . . . . X . . . . . . . O . . | $$ | . . . . . . O . . . . . . . . . . . . | $$ | . . . . . . . . X . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O . . . . . . . . . . . . . . . . | $$ | . X O . . . . . . . . . . . . . . . . | $$ | . X O . . . . . . . . . . . . O . . . | $$ | . . X O . . . . X . . . . . . . . . . | $$ | . . X O . . . O X . . . O . . O . . . | $$ | . . X O . . . O . . X . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

.sgf:

Posted: **Wed Sep 25, 2024 12:03 am**

Glad to see the series is still going! Interesting game. [edit: I mean game 126, not the most recent game! Not keeping up with the pace here.] To my untutored eye, it looks like white has the initiative in the opening, and black has weak stones all over the place. Fascinating to see how white's top turns into nothing.

No result in the SGF... It's jigo, right?

Posted: **Wed Sep 25, 2024 7:22 am**

xela wrote:No result in the SGF... It's jigo, right?

Yes. The last move of each .sgf has a comment. "KataGo 50 %" basically means it was a "draw by resignation" rather than a draw by counting. I usually don't bother to let KataGo fill all the dame

Posted: **Wed Sep 25, 2024 8:28 am**

Here are two (NZ rules, 7 komi) games (in the same .sgf) that Kata continued from "random"-feeling positions constructed by lightvector (KataGo's creator): https://online-go.com/review/1087305

Click Here To Show Diagram Code: [go]$$Bc Game 1. $$ +---------------------------------------+ $$ | . . . . . . . O . . . X . . . X . . . | $$ | . . . X . . . . . . . W . O . . . O . | $$ | . O . . . . . . . . . X . . . . . . X | $$ | . . . . O . X . O . . . . O X . X . . | $$ | . . X . . O . X . O . . . . . . . . . | $$ | . O . X . . . O . . . X . . . O . O O | $$ | . X . . . . X . . X . . . . . . . . . | $$ | O . O . . O . . . . O . . O . X . . . | $$ | . . X . . . . . . . . . . . . X . . X | $$ | . . . . . . . . . O . . . . . . . . . | $$ | . X O . . . X . . X . X . . . . O . . | $$ | . . . X . . . O . . . . . X . X . . O | $$ | . O . . O . . . . . O . . . . . . . . | $$ | X . X . . . X . . . . . . . O O . . . | $$ | . O . O . . . . O X . . . . X . . . X | $$ | . . . . X . . . . . . . . . . . . . . | $$ | . X O . . . O . . . . . . . . X . . . | $$ | . . . X . . . . X . O . X . O . . O . | $$ | . . . . . . . O . . . . . . . . X . . | $$ +---------------------------------------+[/go]

Click Here To Show Diagram Code: [go]$$Bc This position was "generated by playing a roughly similar number of white and black moves uniformly randomly, except that moves on the 2nd line are only 1/5th as likely and moves on the 1st line are only 1/20th as likely." — lightvector $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . O . . . . . . O . . . | $$ | . . . O . . . . . . . . . . . . X . . | $$ | . . . . . . . . . O . O X . . . X . . | $$ | . . . . . . . . . . . . . . . . . O . | $$ | . . . . . . . . . . . . X . . . . . . | $$ | . . . . . . . . . . X . . . . . O . . | $$ | . . . . . . . . . . O . . . . . . . . | $$ | . . . . . . . . X . . . . . . . O . . | $$ | . . . X . . . . . . . O . . . . . . . | $$ | . . . . . . . . . . . X . . W X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . O . . . . . . . . . . . | $$ | . . . . . . . . . . . O . . . X . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . . . . X . . . . . . X . . . . . | $$ | . . . . . . . . . . X . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

Posted: **Wed Sep 25, 2024 9:00 am**

In game 128 (7 komi, NZ rules), black gets four corners again, plus a 20-point center territory... and wins by 2 points. https://online-go.com/review/1090627

Click Here To Show Diagram Code: [go]$$Wc The opening. $$ +---------------------------------------+ $$ | . . B . . . . . . . . . . . . . . . . | $$ | . X O . O . . . . . . . . . . . . . . | $$ | . . X O . . . O . X . . . . O . . . . | $$ | . . X O . X . . . . . . X . . . X . . | $$ | . . . X . . . . . . . . . . O . . . . | $$ | . . . . . . . . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O O . . . . . . . . . . . . . . | $$ | . . X X X O . . . . . . . . . O . . . | $$ | . . . . . X . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

.sgf:

Posted: **Fri Sep 27, 2024 12:01 am**

Next up, some small-board high-playout fun!

A 15 x 15 game: https://online-go.com/review/1094254

Click Here To Show Diagram Code: [go]$$Wc White to play. $$ +-------------------------------+ $$ | . . . . . . . . . . . . . . . | $$ | . . X . . . . . . . . . . . . | $$ | . X O X X . . . . . . . . . . | $$ | . . O O . X . . . . . X . . . | $$ | . . O . O . . . . . . . . . . | $$ | . . . X . . . . . . . . . . . | $$ | . X X . . . . . . . . . . . . | $$ | . O X O . . O . . . . . . . . | $$ | . X O X X X X X B . . . . . . | $$ | . O O O O O O O . . . . . . . | $$ | . . . X . X X . . . . . . . . | $$ | . . X . . . O . . . . O . . . | $$ | . . X O . . . . . . . . . . . | $$ | . . O . O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . | $$ +-------------------------------+[/go]

A second and third 9 x 9 game (added to the same .sgf as the first one): https://online-go.com/review/767012

Click Here To Show Diagram Code: [go]$$Wc White to play; A: game 1, B: game 2 $$ +-------------------+ $$ | . . . . . . . . . | $$ | . . . . . . . . . | $$ | . . . . . . . . . | $$ | . . . . . X . . . | $$ | . . . B . . . . . | $$ | . . . . . O . . . | $$ | . . . a b . . . . | $$ | . . . . . . . . . | $$ | . . . . . . . . . | $$ +-------------------+[/go]

Click Here To Show Diagram Code: [go]$$Wc White to play; A: game 2, B: game 3 $$ +-------------------+ $$ | . . . . . . . . . | $$ | . . . . . . . . . | $$ | . . . a . b . . . | $$ | . . . . . X . . . | $$ | . . . X . . . . . | $$ | . . B . . O . . . | $$ | . . . . O . . . . | $$ | . . . . . . . . . | $$ | . . . . . . . . . | $$ +-------------------+[/go]

Posted: **Fri Sep 27, 2024 12:03 am**

A fourth 13 x 13 game (added to the same .sgf as the first three): https://online-go.com/review/767121

Click Here To Show Diagram Code: [go]$$Bc Black to play; A: game 2, B: game 4 $$ +---------------------------+ $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . W . . . . . . . . . | $$ | . . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . b a . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ +---------------------------+[/go]

A 10 x 10 game (6 komi): https://online-go.com/demo/1340141

Click Here To Show Diagram Code: [go]$$Bc The opening. $$ +---------------------+ $$ | . . . . . . . . . . | $$ | . . . . . . . . . . | $$ | . . . . O . . . . . | $$ | . . . O . X . X . . | $$ | . . . . . . . . . . | $$ | . . W . . . . . . . | $$ | . . . O . . X X . . | $$ | . . . . . X . O . . | $$ | . . . . . . . . . . | $$ | . . . . . . . . . . | $$ +---------------------+[/go]

And lastly (for now), two 17 x 17 games (in the same .sgf): https://online-go.com/review/1098281

Click Here To Show Diagram Code: [go]$$Wc White to play; A: game 1, B: game 2 $$ +-----------------------------------+ $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . b O O . . | $$ | . . . . . . . . . . . . a B X . . | $$ | . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . | $$ +-----------------------------------+[/go]

Posted: **Mon Sep 30, 2024 9:43 pm**

Figuring that since black got to play a "slight mistake" on move 1 (white winrate 52 % for black opening with either 4-4 or 3-4), in fairness white should also get to play slight mistakes on move 2 (any move between white 52 % and black 52 % winrate). Games 42, 43, and 129 through 141 (7 komi, NZ rules) continue after black opening 4-4; starting from game 142, they will continue from black opening 3-4. Our overall tally prior to these "slight white mistake on move 2" games was 26 black wins, 52 draws, and 48 white wins, for an effective white winrate of 58.7 %. — Game 129 is one horrifically, breathtakingly complicated fight that erupts from a 3-3 invasion in the top right. An unbelievable draw. https://online-go.com/review/1114494

Click Here To Show Diagram Code: [go]$$Wc White option C: games 42/132/135/136, D: 43/141, E: 129/138, F: 130/133/134/137/139/140, G: 131. $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . b . . . . . . . . . . . a d . . | $$ | . . g c . . . . . . . . . . . e f . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

.sgf:

Posted: **Tue Oct 01, 2024 7:41 pm**

In game 130 (7 komi, NZ rules), black builds a large top side moyo that white begins to reduce with a casual 7th-line shoulder hit at move 22. Black wins by at least 56 points. https://online-go.com/review/1119746

Click Here To Show Diagram Code: [go]$$Wc Games 139 and 140 continue at a instead of D17. $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . B . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . a . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

.sgf:

Posted: **Tue Oct 01, 2024 10:54 pm**

In game 131 (7 komi, NZ rules), white builds a 20-point center territory from her previously pincered group. Black explores some fascinating aji in the bottom right starting at move 83. https://online-go.com/review/1122877

Click Here To Show Diagram Code: [go]$$Bc The opening. $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . . . . . . . . X . . . . | $$ | . . . X O . . X . . . . . . X O O . . | $$ | . . X . . . X . . . . . . . . X O . . | $$ | . . . . O . O X . X . . . . . X . . . | $$ | . . . X O . O X . . . . . . . . . O . | $$ | . . . X . . . O O . . . . . . X . . . | $$ | . . . . X . O . . . . . . . . . . . . | $$ | . . . O O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . . . . . . . . . . . . . X O . . | $$ | . . . . . . . . . . X . . . X . O . . | $$ | . . O . . . . . W . . . . . X O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

.sgf:

Posted: **Mon May 12, 2025 8:47 pm**

Maharani wrote:In game 88 (7 komi, NZ rules), black casually sacrifices an 8-stone group by move 40. White ends up winning the game by around 10 points. https://online-go.com/review/934201

$$Bc 16 previous games continued at a instead of C17. $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . W . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . a . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+
Click Here To Show Diagram Code
[go]$$Bc 16 previous games continued at a instead of C17. $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . W . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . a . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

.sgf:

Tang Jie, CHN 5d has reviewed this game! I’ve included all of his (commented) variations, plus more KataGo variations, in the OGS review.

Life In 19x19

KataGo self-play games + video reviews

Re: My hand-crafted KataGo (+ AlphaGo Teach) self-play games

Re: KataGo self-play games + video reviews

Re: KataGo self-play games + video reviews

Re: KataGo self-play games + video reviews

Re: My hand-crafted KataGo (+ AlphaGo Teach) self-play games

Re: KataGo self-play games + video reviews

Re: KataGo self-play games + video reviews

Re: My hand-crafted KataGo (+ AlphaGo Teach) self-play games

Re: My hand-crafted KataGo (+ AlphaGo Teach) self-play games

Re: My hand-crafted KataGo (+ AlphaGo Teach) self-play games

Re: My hand-crafted KataGo (+ AlphaGo Teach) self-play games