Cool tesuji bro.

Solomon · #1

Was randomly kibitzing a game between two mid/high dans, saw a pretty interesting endgame play that I thought people might be interested in:

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | . . . X O X . O X X O O O X X O O O X | $$ | . . O O X X . . . O X O X . . X O O O | $$ | . O . X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O . . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Shaddy · #2

Araban wrote:

Was randomly kibitzing a game between two mid/high dans, saw a pretty interesting endgame play that I thought people might be interested in:

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | . . . X O X . O X X O O O X X O O O X | $$ | . . O O X X . . . O X O X . . X O O O | $$ | . O . . O . . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O . . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Solomon · #3

Shaddy wrote:

Araban wrote:

Was randomly kibitzing a game between two mid/high dans, saw a pretty interesting endgame play that I thought people might be interested in:

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | . . . X O X . O X X O O O X X O O O X | $$ | . . O O X X . . . O X O X . . X O O O | $$ | . O . . O . . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O . . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Solomon · #4

I made a small mistake in the original diagram, fixed it up sorry! ('small' in the sense that the adjustment isn't large; it is still significant!)

Also, I'm not making any guarantees that a solution exists; could easily be wrong, since this comes from a raw game, not a tsumego book.

topazg · #5

With that adjustment, the shape move at B10 looks promising? Though:

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | 7 . . . O . . . . O O X X X X X X X X | $$ | 6 1 5 X O X . O X X O O O X X O O O X | $$ | 3 2 O O X X . . . O X O X . . X O O O | $$ | 4 O . X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O 8 . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

White lives in double ko here? Bah... this doesn't work either:

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | 5 1 3 X O X . O X X O O O X X O O O X | $$ | 4 2 O O X X . . . O X O X . . X O O O | $$ | . O . X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O 6 . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Perception · #6

I think this is right, not sure so please check and let me know if I missed something.

Click Here To Show Diagram Code: [go]$$Bcm1 7 at 1, 8 at 3, 10 connects. $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | 4 2 5 X O X . O X X O O O X X O O O X | $$ | 3 1 O O X X . . . O X O X . . X O O O | $$ | 6 O 9 X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O . . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Bcm1 7 at 1, 8 at 3, 10 connects. $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . 1 . . O . . . . O O X X X X X X X X | $$ | O O X X O X . O X X O O O X X O O O X | $$ | O O O O X X . . . O X O X . . X O O O | $$ | O O X X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O . . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Since white can't resist he has to give way.

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | 4 2 6 X O X . O X X O O O X X O O O X | $$ | 3 1 O O X X . . . O X O X . . X O O O | $$ | 7 O 5 X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O . . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Edit: Or save his group at the bottom.

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | . . 3 X O X . O X X O O O X X O O O X | $$ | . 1 O O X X . . . O X O X . . X O O O | $$ | . O 5 X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O 2 4 X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

When I was looking at the diagram before it was fixed I was looking at this same sequence except white could have let black capture after this :b1:

and it comes to nothing (unless I missed something of course).

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | . . . X O X . O X X O O O X X O O O X | $$ | . . O O X X . . . O X O X . . X O O O | $$ | . O 2 1 O . . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O . . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Shaddy · #7

topazg wrote:

With that adjustment, the shape move at B10 looks promising? Though:

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | 7 . . . O . . . . O O X X X X X X X X | $$ | 6 1 5 X O X . O X X O O O X X O O O X | $$ | 3 2 O O X X . . . O X O X . . X O O O | $$ | 4 O . X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O 8 . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

White lives in double ko here? Bah... this doesn't work either:

Click Here To Show Diagram Code: [go]$$Bcm1 B to play (W's last move marked). $$ --------------------------------------- $$ | . . . . . . . . . X O O O O O . . . . | $$ | X X O O X . . . X X O X X O . O . . . | $$ | . X O X . . . . X O O X X O O O . O . | $$ | O X O X . . . . X X X X O X O X X X . | $$ | . O X X . . . . . . O O O X X O . O O | $$ | O . O O X X X . . . . X X . X O O . X | $$ | . O . . O O O X X . X . . . . X O . . | $$ | . . . . . . . O . O X O O . X . O . . | $$ | . . . . O . . . . O O X X X X X X X X | $$ | 5 1 3 X O X . O X X O O O X X O O O X | $$ | 4 2 O O X X . . . O X O X . . X O O O | $$ | . O . X O O . . O O X X . X X X O . . | $$ | X O O X X O O O . X . . X . X X O O O | $$ | . X X O X X X O . . X . X O O O X O . | $$ | X X X O 6 . X O X X . . X O . O X X . | $$ | . X O O . O O X . , X X O . . O O . X | $$ | . X X O O X X X X X O O O . . . O . . | $$ | . X O W O O . X X O O . . . . . . . . | $$ | . X X O . O . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Yeah, that's a pretty important change, :lol:

Cool tesuji bro.

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