Statistics from a 27M game sample

Maybe OGS isn’t that easy for players to find teaching games after all?

But a lot of teaching games probably weren’t been called teaching game though (those 50 25 20 15 12 -20 -25 -30,… -100, etc are most likely all reverse komi teaching games). And I wonder how many of the handicap stones’ games were teaching games, since they will be difficult to separate. Is there a ratio of the unranked and ranked handicap vs reverse komi games that have “teaching” in their titles?


Trying to dig into teaching games.

There’s no flag about that, so I tried to filter on game name.
I looked for the string “teach” which could possibly appear in various combinations.
I’m keeping only 9x9 and 19x19 boards and considering both handicap and komi.

Here’s a summary:

Board False True Total
9x9 1980 1841 3821
19x19 9713 2340 12053
Total 11693 4181 15874

About 9k games have actually a title such as “Teaching game” or similar.
Many are like “Please teach me” or “Looking for a teaching game” or “will teach new and high kyu” and so.

Some are… interesting? :smiley:
Such as

  • destroy the timeout losers! teach them how to resign!
  • Not here to teach, not here to learn, noone just another bot
  • ultimate teachin
  • beginners or teachers pls
  • Teaching Lesion for me
  • nick sibicky told me i have great talent for making go teachers sad
  • looking for a teacher-typeofthing | send me a message in the chat
  • three go teachers have given up on me so far
  • Teach Me and I’ll Teach You?

and so on :slight_smile:

Let’s see some charts: handicap VS komi.

9x9 ranked games.
Best part are no handicap, standard komi (5.5)

9x9 unranked
Same as before plus a few funny games with 500 komi or 50 handicap

Same chart but removing handicap > 9 and extreme komi:

19x19 ranked
Mainly standard options: no handicap with standard komi or handicap with 0.5 komi.
A single -40 komi game.

19x19 unranked
Some 9 handi with various komi. A few extreme values.

Same chart but removing handicap > 9 and extreme komi.
Standard combinations as seen for ranked games. Looks like reverse komi isn’t very popular on OGS.
Each small dot is 1 to 3 games in this chart.


Finally created what wished to see from the beginning:

coordinate where black stone is more often than white stone is darker
coordinate where white stone is more often than black stone is brighter
empty board is where number of clicks(of opposite colors) is more or less same

so we can roughly see where territory is usually black and where territory is usually white as games go on from move 0 to 300.

( on current coordinate: if number of clicks on move 1(black) is bigger than number of clicks on move 2(white), it painted as black )

move 2:

( on current coordinate: if sum of number of white clicks on moves 2-100 is bigger than
sum of number of black clicks on moves 1-99, it painted as white )

move 100:

move 200:

move 300:

*if all coordinates are painted, territory difference is too big sometimes, it looked weird, so the most close to equal coordinates are not painted. Choice of how many the most close to equal coordinates to not paint is done in order to minimize territory difference.


Wow! A lot of cosmic style from black! :grinning_face_with_smiling_eyes:

Looks like white plays more than black in the middle… except for tengen, which is in black’s control from the very beginning!

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Wait, there were hundreds of games in the -20 -30 -50, etc. in the previous reply of custom komi chart, where do they go? They just don’t have titles including the keyword “teach”? (as I suspected, most teaching games couldn’t be easily found with just titles)

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How many clicks are there in the 1-1?

on moves 1, 2:

sum of 4 black 1-1 clicks is 6250
sum of 4 white 1-1 clicks is 3524

black tengen alone is 181 192 clicks
white tengen 71 067 clicks

these pictures are about difference, not about how top they are

Sorry i don’t understand.

on moves 1,2 ?

move number 1 (black), move number 2 (white)
1-1 is coordinate


Does it mean that in the database 6250 games started with a 1-1?

In a large enough data set, there are bound to be some trolls and misclicks

I think it would make sense to filter out some of the very rare moves to reduce such noise

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For white 2 on 1-1 we have forgotten handicap
(For black 1 we could say forgotten handicap + wrong color)
And last we have full beginners too.

top 10, click to open, click to zoom

Top 10 coordinates are in the center for more than 100 moves, but then:





on all moves later top 10 coordinates are all on the 1st line

…it ends so fast and abruptly.

Maybe we need more than just relative frequency with different color, but relative click amount with different circle size, so it would be a better indication of the actual distribution (maybe a log-scale factor for relative size, so they won’t disappear with less than 1 pixel)


Titles aren’t very good for picking teaching games.

Of course there could be more looking for different languages (French, German, Japanese and so on). But choosing a title is completely free and based on player’s taste and creativity.

I also forgot to mention that some games have “teach” in their title just because one player has “teach” in his username and the game title is like vs :grin:

I could investigate further in remaining reverse komi games: removing all those with “teach” in the title and looking at the rest.

Considering all you’ve said, I don’t think this is representative of teaching games, unfortunately.

Why did you choose “teach” instead of “teaching game”? I don’t think it would be representative still, but, it would have made more sense no?

Need a language AI to decrypt what is teaching game

I agree.

Just because titles like “Please teach me” or "“will teach new and high kyu” seems actually tied to teaching games.
That brought also some false positives, but I can’t say which are more… big data are full of noise.

I just realised that I forgot to filter out annuled games from that sample! :grin:
There are 3555 games out of 15874 which should be removed:

Outcome Board False True Total
Abandonment 19x19 2 2
Cancellation 9x9 126 80 206
19x19 1036 153 1189
Disconnection 9x9 8 25 33
19x19 48 6 54
Moderator Decision 9x9 2 2
19x19 5 5
Timeout 9x9 313 214 527
19x19 938 599 1537
Total 2478 1077 3555

I didn’t mention resigned games (there’s 7701 of them) since I suppose that a teaching game could legitimately end by resignation.

Back to reverse komi:

In the chart that you quoted there were 70897 games. Only 147 of them have “teach” in their title.
Here is a breackdown of their outcome:

Outcome Games
Cancellation 3594
Disconnection 440
Resignation 29389
Score 16090
Timeout 21342
Total 70855

Here are more frequent game titles:

Game Name Games
Friendly Match 14603
친선 대국 2631
友谊赛 2099
Online Lesson 1589
親睦戦 1392
友谊对局 978
Let’s play go! 851
Дружеский матч 783
友誼對局 646
Freundschaftsspiel 596
Partie amicale 391
Partida amistosa 327
go 191
i get black, you get 50 komi 151
Vriendschappelijke Wedstrijd 125
Challenge from onigaijin4649 101
Challenge from lavb 100

Looks like “Friendly game” in many languages.

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Simply the default setting (which change with your language setting, 2cts guess)

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Yes! I just deleted all moves with below average number of clicks from simulation.
move 186:
now these shapes are clear and make some sense
only then 1st line moves begin