Miai Values List / 2.00 and more

Sub-page of MiaiValuesList

See Miai Values List for conventions and explanation.

Table of contents Table of diagrams
Defend two stones
Capture two stones
Take stone, save stone
Crawling along width-two corridor
Take away territory
Crawl on 2nd line
Take small corner
[Corner 1-2 connection value]
Take a small corner
Sente
Take stone, points
Defend four
Second line hane double gote
Defend three stones
Capture three stones
Connect with sente
Connect with sente (ii)
Save one stone on the second line
Capture one stone, gote followup
First line hane-connect, sente for one side
Atari
Atari (ii)
Connect
Capture one stone, gote followup in corner
Save one stone, gote followup in corner
Connect
connect one, cut off two
Second line hane with sente follow-up
Reply to Monkey Jump
Continue from Monkey Jump
Monkey Jump
Prevent Monkey Jump
Descent
Descent
Capture one stone
Capture one stone
Second line hane with sente follow-up for both sides
Save one stone on the second line, defender must avoid ko
Capture one stone, sente followup, defender must avoid ko
From [value of a monkey jump]
From [value of a monkey jump]
Second line hane with sente follow-up for both sides
Descent with sente follow-up for both sides
Crawl on second line
Index of sub-pages

2.00 (Exactly 2)

[Diagram]
Defend two stones  
[Diagram]
Capture two stones  
[Diagram]
Take stone, save stone  
[Diagram]
Crawling along width-two corridor  

(Assumes an infinite White territory to the right.)

Ambiguous exchange. Later, B5 - W6 is also ambiguous (1.00).



2.08 (``sf2.08bar{:sf3:} = ``2 1/12)

[Diagram]
Take away territory  



2.13 (``sf2.125 = ``2 1/8)

[Diagram]
Crawl on 2nd line  

Next play is worth 1.25.



2.33 (``sf2.3bar{:sf3:} = ``2 1/3)

[Diagram]
Take small corner  



2.67 (``sf2.6bar{:sf6:} = ``2 2/3)

[Diagram]
Take a small corner  

Even if Black is komaster, B2 is just as big, and takes sente.

[Diagram]
Sente  
[Diagram]
Take stone, points  



2.92 (``sf2.91bar{:sf6:} = ``2 11/12)

[Diagram]
Defend four  



3.00 (Exactly 3)

[Diagram]
Second line hane double gote  

After B1 - B3, later W6 is an ambiguous move.

[Diagram]
Defend three stones  
[Diagram]
Capture three stones  

[1]



[Diagram]
Connect with sente  

B1 creates ko threats.

[Diagram]
Connect with sente (ii)  

W2 is tesuji.



[Diagram]
Save one stone on the second line  
[Diagram]
Capture one stone, gote followup  



[Diagram]
First line hane-connect, sente for one side  



3.08 (``sf3.08bar{:sf3:} = ``3 1/12)

[Diagram]
Atari  

Later, W4 - B5 is sente (1.58). Even later,

[Diagram]
Atari (ii)  

so is W1 - B4 (1.00).



3.17 (``sf3.1bar{:sf6:} = ``3 1/6)

[Diagram]
Connect  



3.33 (``sf3.3bar{:sf3:} = ``3 1/3)

[Diagram]
Capture one stone, gote followup in corner  
[Diagram]
Save one stone, gote followup in corner  

Next play gains 1.67



3.46 (``sf3.458bar{:sf3:} = ``3 11/24)

[Diagram]
Connect  

Black a would be an overplay, because of shortage of liberties. White replies at B1.



3.50 (``= ``3 1/2)

[Diagram]
connect one, cut off two  



4.00 (Exactly 4)

[Diagram]
Second line hane with sente follow-up  

If the exchange B5-W8 is sente (and White can block at W6), this is worth one point more than in the double gote situation.



4.17 (``sf4.1bar{:sf6:} = ``4 1/6)

[Diagram]
Reply to Monkey Jump  

(Assumes infinite White territory to the right.)

[Diagram]
Continue from Monkey Jump  

(Assumes infinite White territory to the right.)



4.42 (``sf4.41bar{:sf6:} = ``4 5/12)

[Diagram]
Monkey Jump  

(Assumes infinite White territory to the right.)

[Diagram]
Prevent Monkey Jump  

This assumes infinite White territory to the right, and also assumes that Black can get at least one significant ko threat. (I showed that if Black barely has ko threats and can't get any bigger ko threat, then it's not worth it for White to prevent the monkey jump at this temperature.)



4.50 (``= ``4 1/2)

[Diagram]
Descent  
[Diagram]
Descent  

HolIgor: requires verification.

[Diagram]
Capture one stone  

Charles Assume that Black can't resist when White plays a, and Black must play b. Then the value is 4.5 if Black c will be sente later, or 5.5 if White at c hane-connect is sente later. That is, White gains four points anyway and takes away the circled points in the diagram above. The value is at least 4.5; if White also has c in sente to take away the square-marked points it is 5.5.

As Bill says, we tend to need the boundaries of territories to be marked.



HolIgor: I assumed

[Diagram]
Capture one stone  

But in this case Black needs a to be protected. Charles Yes: so is B2 here tesuji in this case? White b, Black c creates shortage of liberties for Black.

tapir: After B2 the sequence ends up sente for white. 9 points sente = miai value of 9 - which is bigger than the 5.5 of the probable version. (=B2 here is wrong)



5.00 (Exactly 5)

[Diagram]
Second line hane with sente follow-up for both sides  

If the first-line hane followup is sente for both sides and there are no ko threats, the value is 5 points.



[Diagram]
Save one stone on the second line, defender must avoid ko  
[Diagram]
Capture one stone, sente followup, defender must avoid ko  

If White can't play W6 at B7, then B1-W2-B3 is a 5-point ambiguous sequence. In that case, W4 at B5 is a 5-point reverse sente.



5.42 (``sf5.41bar{:sf6:} = ``5 5/12)

What it says there ... ?%%% (Assumes infinite White territory to the right and sufficiently large Black territory to the left.)

B2 tenuki. Later W3 - B6 is sente (3.00).



10.00 (Exactly 10)

[Diagram]
Second line hane with sente follow-up for both sides  

dnerra: If both sides cannot block the first-line hane (here black would cut at W6 if White played W6 at B7, leading to a ko disaster for white), the value is 7 points. This also assumes that the clamp with B5 at W6 does not work. I think that sometimes the descent of B1 at B3 is larger, but this is difficult to tell.



[Diagram]
Descent with sente follow-up for both sides  

Bill: I think that this is a case where the proverb that says that the monkey jump is worth 8 points applies. If B3 is an 8 point sente, then the descent is worth 10 points. (After the reverse sente Black has gained 2 points.)


Footnotes

[1]

[Diagram]
Crawl on second line  

(Assumes infinite White territory to the right.)

Charles Bill, you edited this out - a problem ...?

Bill: The problem is that it is not correct play, given the conditions. The monkey jump is. Yes, if you play it, you pick up 3 points. But values are based upon correct play. You assume that your opponent's play is correct to obtain a value. Yours should be, too.

Charles OK - I think it would be useful either to have 'starred' status for something as conceptually basic as this one; or to include it in a footnote or other area. And to decide whether, for example, the comparison with the small monkey jump should be done on-list or off-list.

Discussion moved to Do Inferior Plays have Values.

Miai Values List / 2.00 and more last edited by PJTraill on February 10, 2019 - 18:38
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