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BQM31

 

BQM31 Modern Double Kakari
   

[Diagram]
Diag.: Double Kakari

DaveSigaty: The original problem on BQM31 refers to Kogo recommending 'a' as the preferred reply to the double kakari of 2 and 4. In the game cited, B actually chose 'b'. B 'b' is certainly the traditional reply but I wondered what is actually used most frequently in this position in modern Go. I used the GoGoD CD and limited my search to games from 2000-2001. The results for the 81 games listed that featured the double kakari were as follows:

  • B 'a' appeared in 23 games
  • B 'b' appeared in 58 games
  • B 'c' appeared in 1 game

I searched with an otherwise empty quadrant out as far as the neighboring star points so these games represented double kakari attacks on the B corner stone rather than replies to a B pincer.

[Diagram]
Diag.: Double Kakari Tsuke Nobi

The most popular tsuke nobi variation proceeded through W 4 in 21 games. B replied with 5 in 19 of them (and 'a' in the other 2). W 6 is most frequent continuation, appearing in 14 of the 19 games (W 'b' appeared 4 times and W 'c' once).


I was surprised at how frequently this double kakari appeared in the top pro games of the last two years. A quick review of the games showed that is mainly due to W's efforts to prevent B choosing his favorite large-scale fuseki.

[Diagram]
Diag.: Anti-Kobayashi Example

White plays to deny Black the Kobayashi Fuseki. In this and the following example B may respond to W 6 before turning to the lower left.


[Diagram]
Diag.: Anti-Mini-Chinese Example

White plays to deny Black the Small Chinese Fuseki



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