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3-4 point high approach, two-space high pincer daidaigeima
Path: 34PointHighApproachTwoSpaceHighPincer   · Prev: 34PointHighApproachTwoSpaceHighPincerTwoPointJump   · Next: 34PointHighApproachTwoSpaceHighPincerTenuki
  Difficulty: Dan level   Keywords: Joseki

[Diagram]
Extra-large knight's move

This choice of W1 is the latest reply to Black's pincer BC to have some sequences developed in pro play.


[Diagram]
One-point extension

In recent pro games B1 is the common answer (in the early days it seems that tenuki was recommended). Then W2 is a way to make shape.


[Diagram]
Wedge in

After that B3 to give White cutting points is usual. White next has played both at a, building influence for a counter-pincer on the upper side, and at b for some difficult fighting (making this look like an unexplored joseki).

Charles Matthews


[Diagram]
Keima attachment

Another common answer, maybe even more common[1] than a, is the attachment at B1. The sequence to B7 is joseki. White hopes that her marked stone will be more useful than one at b would have been. After B7, W8 at any of c, d and e has been played.

Andre Engels



[1]

Checking through Gobase, it is like 60-40 for the one-point jump rather than the contact play; and the current Gogod collection has proportion 2:1.

Charles

Could you give the absolute numbers? MasterGo has 7 times 1-point jump, 10 times contact play (3 times various others). - Andre Engels

On Gogod (current) it is 8 to 4 for those. Searching Gobase just now it seems to be 8 and 8. Anyway, two main variations, one could say.

Charles

Andre Engels: (reaction to a reaction by Charles that he later removed again "My feeling is that this has to be looked at in terms of date and place, too.") That's a good point.

According to the MasterGo data, the attachment is the older answer, being played at least since the 1970s, then from around 1980 other moves were experimented with, resulting in the jump becoming joseki. Since the 1990s it finds little difference between the two. There are too few non-Japanese games in the database to make a statement about national difference.

Here are the games with place and year. The C1999 is actually an international game with the Chinese player playing black. The two * games are the same one, black playing tenuki but later returning to play first in this corner. The 2001 and 2002 games are actually ones I got from other sources and added to the database myself.

attachment: J1977 J1977 J1978 C1981 K1984 K1988 J1995 J1995 J1997 J2002*
jump: K1981 J1987 J1987 J1987 J1990 C1996 C1999 J2001
others: J1979 J1985 J1986
tenuki: C1990 J2001 J2002*

Charles Yes, roughly what I thought was happening. Still too small a sample, though.



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