Reverse Monkey Jump

    Keywords: Tesuji
[Diagram]

Reverse monkey jump

Whereas a monkey jump involves jumping with a larger knight's move from the second to the first line, the reverse monkey jump, as the name implies, involves jumping with a large knight's move from the first to the second line, as in this diagram.

Jumpy monk literally reversing the term monkey jump is the humourous version of this term.

Table of contents Table of diagrams
Reverse monkey jump
Sente descent
Sente hane-kosumi
1-2-3 principle applied
Reverse monkey jump twice
1-2-3 principle ignored
1-2-3 principle success
Search pattern

Situations in which it is used

Sometimes, it is useful to realize that you can play a monkey jump in reverse, because you can descend to the first line in sente.

[Diagram]

Sente descent

W1 is sente against the corner. Black must defend with B2 or the corner will die. After that, the reverse monkey jump W3 destroys black's territory along the top.

[Diagram]

Sente hane-kosumi

W1 and W3 threaten to make ko of the corner. B4 defends, after which W5 destroys the base of the black stones, forcing them to run. See also: Threatening a ko

Applying the 1-2-3 principle

Quite often, it is better to forego the sente move that makes the reverse monkey jump possible, and instead play it directly, consistent with the 1-2-3 principle.

[Diagram]

1-2-3 principle applied

B1 is an application of the 1-2-3 principle. A black move at a is sente against the corner, but black does not need to play it.

[Diagram]

Reverse monkey jump twice

If white fails to realize that the descent is sente, and tries to cut off B1, the reverse monkey jump B7 turns the whole corner into a ko.

[Diagram]

1-2-3 principle ignored

If Black plays the descent in sente, it induces White to defend her corner, Black lose points here compared to playing B3 directly, which leaves the possibility to play other endgame plays against the corner later.

[Diagram]

1-2-3 principle success

Here, we see the success of the 1-2-3 principle. W2 defends against further incursions into white's territory along the top. Black can then switch to the sente endgame in the corner, and can choose to play a when and if that becomes the biggest gote endgame move.


Application in tsume go

Some tsume-go that involve this tesuji:


[Diagram]

Search pattern

unkx80: Did a search using the following pattern. Relevant results:

Related problems:


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