Double Ladder

  Difficulty: Beginner   Keywords: Tactics

Fhayashi -- I've seen this kind of thing pop up a few times during my games, but I haven't seen any references to it...

[Diagram]

Double ladder

Anyone care to comment? I guess it shouldn't be much more difficult to read out than a normal ladder, though I find it to be more amusing.


[Diagram]

Double ladder

Wouldn't this be what actually happens?

Charles Matthews It seems that both players alternately get the chance to continue the ladders, or to break out themselves using a double atari like this. The situation must be unstable: it can hardly be the case that continuing will be best for both.


[Diagram]

Hane vs. Yamashita, 2006 Kisei Game 1, alternative to move 89

Shukan Go, in its 2006-01-30 issue, gave a commentary on the 1st game of the 2006 Kisei match between Hane Naoki and Yamashita Keigo, showing how Black (Yamashita) would be destroyed if he cut with B1 at move 89 and then pulled his stone out with B3. Yamashita instead played at the circled point and went on to win the game.

The term double shicho is apparently not used in Japan. Instead the commentary described the sequence as "linked shichos". Sure, I could have read that out.

[Diagram]

Moves 99 to 108

[Diagram]

Moves 109 to 118

[Diagram]

Moves 119 to 128

[Diagram]

Moves 129 to 138

[Diagram]

Moves 139 to 144


Another kind of 'Double Ladder'

Sugiuchi Masao, 9p vs. Fujisawa Hosai, 9p

[Diagram]

Moves 25 to 34

[Diagram]

Moves 35 to 44

Mentioned in Kageyama Toshiro's Lessons in the Fundamentals of Go as a game that will "go down in the annals of professional play as an all-time freak.".



You can see the complete game at the GoBase Replay Service ([ext] http://www.gobase.org/service/uncgi/bin/replay-sgf?gam=/games/japan/titles/meijin-old/1/game-l46.sgf&off=null).


Dansc: This kind of double ladder is a usual manego breaker, and therefore not really too uncommon. This is the only game in which I've seen this breaker played almost all the way to the end, though.


This is a copy of the living page "Double Ladder" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
[Welcome to Sensei's Library!]
StartingPoints
ReferenceSection
About