Here's an interesting tsumego which has recently stumped a good friend on KGS recently. From a somewhat recent Japanese problem book for dans. Enjoy Black to move
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O . . . O X X . . $$ | . X . . O . X . . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O . . . O X X . . $$ | . X . . O . X . . . . $$ +-----------------------[/go]
Re: Interesting high dan tsumego
Posted: Sun Jan 13, 2013 10:58 pm
by lovelove
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 7 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 5 4 1 O X X . . $$ | . X 6 3 O 2 X . . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 7 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 5 4 1 O X X . . $$ | . X 6 3 O 2 X . . . . $$ +-----------------------[/go]
Re: Interesting high dan tsumego
Posted: Sun Jan 13, 2013 11:09 pm
by logan
lovelove wrote::mrgreen:
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 7 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 5 4 1 O X X . . $$ | . X 6 3 O 2 X . . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 7 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 5 4 1 O X X . . $$ | . X 6 3 O 2 X . . . . $$ +-----------------------[/go]
What did you receive in this variation?
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O . . 1 O X X . . $$ | . X . 3 O 2 X 4 . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O . . 1 O X X . . $$ | . X . 3 O 2 X 4 . . . $$ +-----------------------[/go]
Re: Interesting high dan tsumego
Posted: Sun Jan 13, 2013 11:59 pm
by ez4u
logan wrote:
lovelove wrote::mrgreen:
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 7 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 5 4 1 O X X . . $$ | . X 6 3 O 2 X . . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 7 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 5 4 1 O X X . . $$ | . X 6 3 O 2 X . . . . $$ +-----------------------[/go]
What did you receive in this variation?
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O . . 1 O X X . . $$ | . X . 3 O 2 X 4 . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O . . 1 O X X . . $$ | . X . 3 O 2 X 4 . . . $$ +-----------------------[/go]
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 1 X O X X . . $$ | . X 4 X O O 2 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 1 X O X X . . $$ | . X 4 X O O 2 O . . . $$ +-----------------------[/go]
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O 6 O . O X . . . $$ | . X O 7 1 X O X X . . $$ | . X 2 X O W 3 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O 6 O . O X . . . $$ | . X O 7 1 X O X X . . $$ | . X 2 X O W 3 O . . . $$ +-----------------------[/go]
at the marked stone
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 12:03 am
by logan
Yep, good job : )
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 12:50 am
by Dusk Eagle
I think this alternate move for also works.
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 . 1 O X X . . $$ | . X . . O 2 X . . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 . 1 O X X . . $$ | . X . . O 2 X . . . . $$ +-----------------------[/go]
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 1:02 am
by tchan001
ez4u wrote:
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 1 X O X X . . $$ | . X 4 X O O 2 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 1 X O X X . . $$ | . X 4 X O O 2 O . . . $$ +-----------------------[/go]
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O 6 O . O X . . . $$ | . X O 7 1 X O X X . . $$ | . X 2 X O W 3 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O 6 O . O X . . . $$ | . X O 7 1 X O X X . . $$ | . X 2 X O W 3 O . . . $$ +-----------------------[/go]
at the marked stone
Not quite ez4u
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X . X O O . O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X . X O O . O . . . $$ +-----------------------[/go]
Dusk Eagle wrote:I think this alternate move for also works.
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 . 1 O X X . . $$ | . X . . O 2 X . . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 . 1 O X X . . $$ | . X . . O 2 X . . . . $$ +-----------------------[/go]
Not quite Dusk Eagle
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 . 1 O X X . . $$ | . X 4 . O 2 X . . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 . 1 O X X . . $$ | . X 4 . O 2 X . . . . $$ +-----------------------[/go]
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 1:14 am
by lovelove
ez4u's reading is right.
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X . 4 3 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X . 4 3 O . . . $$ +-----------------------[/go]
$$Bc 8 at 6, 9 at 7 $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O 4 O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X 6 7 3 O . . . $$ +-----------------------
[go]$$Bc 8 at 6, 9 at 7 $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O 4 O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X 6 7 3 O . . . $$ +-----------------------[/go]
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 1:24 am
by ez4u
tchan001 wrote:
ez4u wrote:
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 1 X O X X . . $$ | . X 4 X O O 2 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 1 X O X X . . $$ | . X 4 X O O 2 O . . . $$ +-----------------------[/go]
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O 6 O . O X . . . $$ | . X O 7 1 X O X X . . $$ | . X 2 X O W 3 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 5 O O X . , . $$ | . X O 6 O . O X . . . $$ | . X O 7 1 X O X X . . $$ | . X 2 X O W 3 O . . . $$ +-----------------------[/go]
at the marked stone
Not quite ez4u
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X . X O O . O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X . X O O . O . . . $$ +-----------------------[/go]
Yep, careless...
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O a O O X . , . $$ | . X O 4 O . O X . . . $$ | . X O 1 3 X O X X . . $$ | . X 2 X O O 5 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O a O O X . , . $$ | . X O 4 O . O X . . . $$ | . X O 1 3 X O X X . . $$ | . X 2 X O O 5 O . . . $$ +-----------------------[/go]
If 4 at 5, "a" reverts to earlier diagram
$$Wc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O O O a O X . . . $$ | . X O X X X O X X . . $$ | . X O X 2 1 X O . . . $$ +-----------------------
[go]$$Wc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O O O a O X . . . $$ | . X O X X X O X X . . $$ | . X O X 2 1 X O . . . $$ +-----------------------[/go]
White cannot fill at "a" instead of recapturing due to shortage of liberties.
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 1:26 am
by lovelove
ez4u wrote:Yep, careless...
Any problems with my solution, or just an alternative?
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 1:28 am
by tchan001
lovelove wrote:ez4u's reading is right.
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X . 4 3 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X . 4 3 O . . . $$ +-----------------------[/go]
$$Bc 8 at 6, 9 at 7 $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O 4 O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X 6 7 3 O . . . $$ +-----------------------
[go]$$Bc 8 at 6, 9 at 7 $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O 4 O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X 6 7 3 O . . . $$ +-----------------------[/go]
Model solution from book
is a ko
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O O O X . . . $$ | . X O O 3 2 O X X . . $$ | . X X X O 1 . O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O O O X . . . $$ | . X O O 3 2 O X X . . $$ | . X X X O 1 . O . . . $$ +-----------------------[/go]
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 1:32 am
by Alguien
Beautiful problem.
I like those chains of one liberty (the children of crane's nest) but they're still too hard for me to see.
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 1:34 am
by lovelove
tchan001 wrote:
lovelove wrote:ez4u's reading is right.
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X . 4 3 O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O . O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X . 4 3 O . . . $$ +-----------------------[/go]
$$Bc 8 at 6, 9 at 7 $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O 4 O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X 6 7 3 O . . . $$ +-----------------------
[go]$$Bc 8 at 6, 9 at 7 $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O 4 O X . . . $$ | . X O 2 1 X O X X . . $$ | . X 5 X 6 7 3 O . . . $$ +-----------------------[/go]
Model solution from book
is a ko
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O O O X . . . $$ | . X O O 3 2 O X X . . $$ | . X X X O 1 . O . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O . O O X . , . $$ | . X O . O O O X . . . $$ | . X O O 3 2 O X X . . $$ | . X X X O 1 . O . . . $$ +-----------------------[/go]
I see...
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 1:47 am
by Dusk Eagle
Ah, is the move I missed.
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 8 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 7 1 O X X . . $$ | . X 4 5 O 2 X 6 . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 8 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 7 1 O X X . . $$ | . X 4 5 O 2 X 6 . . . $$ +-----------------------[/go]
Re: Interesting high dan tsumego
Posted: Mon Jan 14, 2013 2:11 am
by ez4u
Dusk Eagle wrote:
Ah, is the move I missed.
$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 8 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 7 1 O X X . . $$ | . X 4 5 O 2 X 6 . . . $$ +-----------------------
[go]$$Bc $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . X X X X X X X . . . $$ | . X O O 8 O O X . , . $$ | . X O . O . O X . . . $$ | . X O 3 7 1 O X X . . $$ | . X 4 5 O 2 X 6 . . . $$ +-----------------------[/go]
at the marked stone
also works.
is the move I missed.