White to play. Easy or Difficult?

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Gomoto
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White to play. Easy or Difficult?

Post by Gomoto »

White to play.

What is the best move?
How difficult was it for you to find? (X out of 10)
Would you discover the move in a casual game? (yes / no)
Have fun!
Click Here To Show Diagram Code
[go]$$c
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X . O X O O X . . . . . X O O O . . |
$$ | . . X X O O X X . X X X . X X X X O . |
$$ | . B X O O O X . O . O . . . . . . X . |
$$ | . O O X . O O . . . . . . . . . . . . |
$$ | . . . X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
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Tryss
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Re: White to play. Easy or Difficult?

Post by Tryss »

A10 would be my best move

As this is a tesuji I solved several time, I found it immediatly. Still, I needed to spend some time to verify that it indeed works.

But yeah, I would have fond this in a casual game
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Farodin
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Re: White to play. Easy or Difficult?

Post by Farodin »

I am under the impression that C11 works as well, though I didn't spend the time analysing whether it is superior to A10 or not. As a 3kyu EGF the difficulty of finding this was perhaps 4/10.

I also am quite sure that I would have spotted this in a casual game, provided that it isn't a blitz game.

EDIT: As Tryss pointed out, my move actually results in a ko. I guess I should revisit my claim that I'd have found this in a casual game :)
Last edited by Farodin on Thu Jul 30, 2020 4:47 am, edited 1 time in total.
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Re: White to play. Easy or Difficult?

Post by Tryss »

Farodin wrote:
I am under the impression that C11 works as well, though I didn't spend the time analysing whether it is superior to A10 or not. As a 3kyu EGF the difficulty of finding this was perhaps 4/10.

I also am quite sure that I would have spotted this in a casual game, provided that it isn't a blitz game.
I think it's ko : C11 A8 A7 A10 then white capture first
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Farodin
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Re: White to play. Easy or Difficult?

Post by Farodin »

Tryss wrote:
Farodin wrote:
I am under the impression that C11 works as well, though I didn't spend the time analysing whether it is superior to A10 or not. As a 3kyu EGF the difficulty of finding this was perhaps 4/10.

I also am quite sure that I would have spotted this in a casual game, provided that it isn't a blitz game.
I think it's ko : C11 A8 A7 A10 then white capture first
You're absolutely right! Looks like I'm a bit out of practice :lol:
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Kirby
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Re: White to play. Easy or Difficult?

Post by Kirby »

Whether or not I'd see this in a game depends a lot on my mental state. Sometimes when I'm out of it, I can miss something very simple like a snapback or something. When I'm not tired and feel focused and sharp, it makes a big difference.
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Knotwilg
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Re: White to play. Easy or Difficult?

Post by Knotwilg »

My processsss
Click Here To Show Diagram Code
[go]$$W success (but)
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X 5 O X O O X . . . . . X O O O . . |
$$ | 3 . X X O O X X . X X X . X X X X O . |
$$ | 2 B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W failure
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X 3 O X O O X . . . . . X O O O . . |
$$ | 2 . X X O O X X . X X X . X X X X O . |
$$ | . B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W success (and solution)
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X . O X O O X . . . . . X O O O . . |
$$ | 1 . X X O O X X . X X X . X X X X O . |
$$ | 2 B X O O O X . O . O . . . . . . X . |
$$ | 3 O O X . O O . . . . . . . . . . . . |
$$ | . . . X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W Variation
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X . O X O O X . . . . . X O O O . . |
$$ | 1 2 X X O O X X . X X X . X X X X O . |
$$ | 3 B X O O O X . O . O . . . . . . X . |
$$ | . O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W Variation
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X . O X O O X . . . . . X O O O . . |
$$ | 1 . X X O O X X . X X X . X X X X O . |
$$ | 3 B X O O O X . O . O . . . . . . X . |
$$ | 2 O O X . O O . . . . . . . . . . . . |
$$ | 5 . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W Variation
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | 2 X . O X O O X . . . . . X O O O . . |
$$ | 1 . X X O O X X . X X X . X X X X O . |
$$ | 5 B X O O O X . O . O . . . . . . X . |
$$ | 3 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
So for me it took 3 variations to find the move and 3 more to check, with depth of reading at most 5. I call it medium.
I hope I would find it in a game. I would definitely spend an overtime on making sure I have the best move in such a game deciding situation.
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Kirby
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Re: White to play. Easy or Difficult?

Post by Kirby »

Knotwilg wrote:
Click Here To Show Diagram Code
[go]$$W failure
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X 3 O X O O X . . . . . X O O O . . |
$$ | 2 . X X O O X X . X X X . X X X X O . |
$$ | . B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
This one doesn't seem like failure:
Click Here To Show Diagram Code
[go]$$W failure continuation
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X 3 O X O O X . . . . . X O O O . . |
$$ | 2 . X X O O X X . X X X . X X X X O . |
$$ | 5 B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
If there's this marked exchange, then it's failure, I think:
Click Here To Show Diagram Code
[go]$$W failure
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | 3 O W O X . X X X . O . O O . . . O . |
$$ | . X B O X O O X . . . . . X O O O . . |
$$ | 2 . X X O O X X . X X X . X X X X O . |
$$ | . X X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
be immersed
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Farodin
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Re: White to play. Easy or Difficult?

Post by Farodin »

Knotwilg wrote:My processsss
Click Here To Show Diagram Code
[go]$$W success (but)
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X 5 O X O O X . . . . . X O O O . . |
$$ | 3 . X X O O X X . X X X . X X X X O . |
$$ | 2 B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W failure
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X 3 O X O O X . . . . . X O O O . . |
$$ | 2 . X X O O X X . X X X . X X X X O . |
$$ | . B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W success (and solution)
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X . O X O O X . . . . . X O O O . . |
$$ | 1 . X X O O X X . X X X . X X X X O . |
$$ | 2 B X O O O X . O . O . . . . . . X . |
$$ | 3 O O X . O O . . . . . . . . . . . . |
$$ | . . . X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W Variation
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X . O X O O X . . . . . X O O O . . |
$$ | 1 2 X X O O X X . X X X . X X X X O . |
$$ | 3 B X O O O X . O . O . . . . . . X . |
$$ | . O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W Variation
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X . O X O O X . . . . . X O O O . . |
$$ | 1 . X X O O X X . X X X . X X X X O . |
$$ | 3 B X O O O X . O . O . . . . . . X . |
$$ | 2 O O X . O O . . . . . . . . . . . . |
$$ | 5 . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W Variation
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | 2 X . O X O O X . . . . . X O O O . . |
$$ | 1 . X X O O X X . X X X . X X X X O . |
$$ | 5 B X O O O X . O . O . . . . . . X . |
$$ | 3 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
So for me it took 3 variations to find the move and 3 more to check, with depth of reading at most 5. I call it medium.
I hope I would find it in a game. I would definitely spend an overtime on making sure I have the best move in such a game deciding situation.
As Kirby already pointed out while I was busy writing this, in your failure diagram, white has enough liberties to give atari to the black stones (I assume it was an oversight):
Click Here To Show Diagram Code
[go]$$W success (but only because black messed up)
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | . O . O X . X X X . O . O O . . . O . |
$$ | . X 3 O X O O X . . . . . X O O O . . |
$$ | 2 . X X O O X X . X X X . X X X X O . |
$$ | 5 B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . 4 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
However, black has a stronger response:
Click Here To Show Diagram Code
[go]$$W black wins the capturing race
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . X . . |
$$ | . . . O X . X O . . . . . . O X . . . |
$$ | 7 O 3 O X . X X X . O . O O . . . O . |
$$ | . X 2 O X O O X . . . . . X O O O . . |
$$ | 4 . X X O O X X . X X X . X X X X O . |
$$ | 5 B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | 8 . 6 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
What if white tries to be sneaky with 3?
Click Here To Show Diagram Code
[go]$$W still failure for white
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 7 . . . . . . . O . . . . . . X . . |
$$ | . 6 5 O X . X O . . . . . . O X . . . |
$$ | 3 O 4 O X . X X X . O . O O . . . O . |
$$ | . X 2 O X O O X . . . . . X O O O . . |
$$ | 8 . X X O O X X . X X X . X X X X O . |
$$ | . B X O O O X . O . O . . . . . . X . |
$$ | 1 O O X . O O . . . . . . . . . . . . |
$$ | . . . X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Click Here To Show Diagram Code
[go]$$W still failure for white (cont.)
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X X . . . . . . . . . . . . . . . |
$$ | . . O O O . X . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . O . . . . . . . O . . . . . . X . . |
$$ | 1 X O O X . X O . . . . . . O X . . . |
$$ | O O X O X . X X X . O . O O . . . O . |
$$ | 3 X X O X O O X . . . . . X O O O . . |
$$ | X . X X O O X X . X X X . X X X X O . |
$$ | . X X O O O X . O . O . . . . . . X . |
$$ | O O O X . O O . . . . . . . . . . . . |
$$ | 4 . 2 X X X O . . . . . . . . . . . . |
$$ | . X X X O O O O . . O O O O . . . O . |
$$ | . . O X X X X O X O X X X O . O O . . |
$$ | . . O X O O O X . X . . . X O O X O . |
$$ | . . O O X X O . . X . . . X O X X X O |
$$ | . . . . O . . . . . . . . . X . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
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Knotwilg
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Re: White to play. Easy or Difficult?

Post by Knotwilg »

Quite so! So I missed the most important reason why the failure failed. :)

As usual there's much more to tsumego than solving it.
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