MonkeyJump/Into High Position

Paths: <= Endgame =>   ·   Endgame tesuji =>
Sub-page of MonkeyJump

Note that the monkey jump may not be best here. See Monkey Jump/Or One Space Jump.

How to stop the monkey jump?  

What's White's proper defense here?


W2 is wrong, as Black can push further into White's territory at B3. The marked squares are miai for Black, and White cannot cut B1 off. Try it out!

Chris Hayashida: What about W2 at B3? Seems to me that Black can't live by taking the inside. Actually, I found my answer. If Black extends upward (down in the diagram) to B2, and White extends to a, then the black hane is hard to deal with. It would work if the ceiling were one line lower, though.


Timur? Doesn't it work in this way? B11 at a, W12 at b, B14 at 6, W15 at c

Correct response:  

It looks suprising, but W4 works:

6 is crucial  

W6 putting the two marked stones into atari is correct. If Black continues with B7, W8 cuts it off.


What if Black does not play 7 like in the above diagram?

Then White still plays 8 like above and starts hunting the Black group, which by now has only one eye. It depends on the situation at the right side of the board which player will succeed.

Correct sequence  

Therefore, Black should play as follows:

In an actual game, Black should be satisfied by the exchange of the marked stones and keep the plays 1 through 10 in reserve. There is no need to play them out immediately.

WTD: I believe Black's play in the above diagram is not optimal. If Black 1 is played at W6 in that diagram, the result is 2 points worse for White.

Better Black reply  

The improved sequence is shown in 'Better Black reply', the diagram to the left. Black 1 in the above diagram is B7 in this diagram, and White 6 in the above diagram is B3 in this diagram. White 4 at B5 (in this diagram) gives the same result. Black can still tenuki after White 2, but if Black plays next locally, it should be at B3, rather than B7.

Better White defence  

White 2 in the above diagram (titled 'Better Black reply') is also not optimal. White kosumi in response to the monkey jump as here is two points better for White. Black must play B3 to avoid being cut off, and then W4 is required. Apart from tenuki, black has three alternatives for B5 (at 6, 7, or 9), each giving the same result. This is equal in value to the 'Correct sequence' above, and does not lose two points as does White 2 in 'Better Black reply' when Black plays B3 in that diagram.

Relevant sequences are shown for a narrower but very similar position, at in problems [ext] 3762 and [ext] 4105, the creation of which led to this analysis.

Paths: <= Endgame =>   ·   Endgame tesuji =>
MonkeyJump/Into High Position last edited by on April 25, 2017 - 10:09
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