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Tengen Statistics
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    Keywords: Opening

Illich: I have made some simple research using database at [ext] gobase.org - concerning tengen as first move:

Games starting with tengen: 60
Black wins: 28
Winning percentage: 47%

-> so this doesn't look very good.
But... when counting only games which were played 1990 or later, it is 15 black wins and only 9 black losses (winning percentage 62.5%). So I guess modern players know how to use it.

But note two things:

  • The database might be skewed towards games where tengen was a winning move, because it is more interesting and "worth writing down". When I asked Jan van der Steen, he thinks that the database is quite representative.
  • There are not too many tengen games so it is maybe not statistically significant.

Enjoy...


Dieter: Thanks for the information. Statistically, this means there is no reason to believe opening on tengen is inferior to corner play. So, while the minor differences are statistically insignificant, that very fact is quite significant.

DaveSigaty: The kicker in here is that Mok Chin-seok, one of the Korean young stars, took up tengen recently. In the GoGoD CD collection he is listed starting 5 games in 2001 with tengen and winning all 5. The two collections are a little different (the latest CD has only 20 tengen games since 1990 and 43 overall) but I think both are dominated by a few players. Yamashita Keigo is included with 8 games since 1990 on the CD, winning 5 and losing 3. The "rest of the world" did manage 4 wins to 3 losses (1 left unfinished) though.

John Fairbairn: Eh? Or have you found another bug in Kombilo, Dave? The latest edition had 83 tengen games and my own collection, which will be included in the next edition has 90. There's quite a range of young Chinese pros who play it.

Dave I think this is just a reflection of how much work you are doing on GoGoD. I posted the numbers in May 2002. Keep it up! :-)

Andre Engels: I have some more from the 'rest of the world' - getting to 9 wins, 5 losses for the period since 1990.

John F. Latest stats from GoGoD (summer 2003): 94 games, of which Black won 50%, White 47.9%% (not all even, of course - some at no komi). But since 1990 there have been 34 games with Black scoring 21-12 (one unfinished), AND all bar one at komi. Even the no-komi game Black won by more than enough. These games cover C, J, K and are not monopolised by any one player. In short, this reinforces the point made about Black now knowing how to use it. Incidentally, there are also games where Black plays tengen on move 3 or 5 (about another 24 in the period from 1990).


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This is a copy of the living page "Tengen Statistics" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.