Life In 19x19 :: tsumego #37

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tsumego #37 http://prod.lifein19x19.com/viewtopic.php?f=15&t=7404	Page 1 of 1

Author:	cyclops [ Mon Dec 10, 2012 5:47 pm ]
Post subject:	tsumego #37
Day #37 December 11th 5 yrs ago no solutions to the advanced problem were posted. Maybe because the issues with the previous series. So solve it this time on your own risk as in real life. #37a Advanced problem Click Here To Show Diagram Code `[go]$$BC $$----------- $$\|.X........ $$\|OOOOOX.X.. $$\|OXXOXX.... $$\|X.XXOO.XX, $$\|.XXOX.OO.. $$\|...O...... $$\|.O.O.O.... $$\|..........[/go]` #37b Intermediate problem Click Here To Show Diagram Code `[go]$$BC $$----------- $$\|.....OX... $$\|OOO.OOX.X. $$\|.X...OX... $$\|.XXXXX..., $$\|..........[/go]` #37c Elementary problem Click Here To Show Diagram Code `[go]$$BC $$-------- $$\|XO.OX.. $$\|X.XXXO. $$\|..OOOO. $$\|OO.,... $$\|.......[/go]` edit: Hi MagicWand, you are welcome to take over. If you get more responses than this one I withdraw happily.

Author:	Josh Hatch [ Mon Dec 10, 2012 5:57 pm ]
Post subject:	Re: tsumego #37
The closest I can find for black is a direct ko. #37a Advanced problem Click Here To Show Diagram Code `[go]$$Bc $$----------- $$\|.X753..... $$\|OOOOOX.X.. $$\|OXXOXX.... $$\|X.XXOO.XX, $$\|6XXOX.OO.. $$\|21.O...... $$\|4O.O.O.... $$\|..........[/go]` #37b Intermediate problem Click Here To Show Diagram Code `[go]$$Bc 7 at 1 $$----------- $$\|..436OX... $$\|OOO1OOX.X. $$\|.X52.OX... $$\|.XXXXX..., $$\|..........[/go]` Note: 5 to the right of 2 would fail because after 6 and the throw in at 7 white connects at 5 Click Here To Show Diagram Code `[go]$$Bc 7 at 1, 9 at 3, 10 to the right of 1 $$----------- $$\|..436OX... $$\|OOO1OOX.X. $$\|.X825OX... $$\|.XXXXX..., $$\|..........[/go]` #37c Elementary problem Click Here To Show Diagram Code `[go]$$Bc $$-------- $$\|XO.OX.. $$\|X1XXXO. $$\|..OOOO. $$\|OO.,... $$\|.......[/go]`

Author:	pancake [ Fri Jan 11, 2013 7:52 am ]
Post subject:	Re: tsumego #37
This ko is better for black. If white takes the ko and black takes the two stones, white still has to connect. In the other ko, white connected, then black took 2 stones. Click Here To Show Diagram Code `[go]$$BC $$----------- $$\|.X.53..... $$\|OOOOOX.X.. $$\|OXXOXX.... $$\|X.XXOO7XX, $$\|6XXOX.OO.. $$\|12.O...... $$\|4O.O.O.... $$\|..........[/go]`

Author:	Prodigious [ Fri Jan 11, 2013 5:03 pm ]
Post subject:	Re: tsumego #37
Here's an unconditional solution Click Here To Show Diagram Code `[go]$$BC $$----------- $$\|.X..9..... $$\|OOOOOX.X.. $$\|OXXOXX.... $$\|X.XXOO.XX, $$\|.XXOX.OO.. $$\|564O...... $$\|7O1O.O.... $$\|.32....... $$\|.8........[/go]`

Author:	cyclops [ Sat Jan 12, 2013 6:12 pm ]
Post subject:	Re: tsumego #37
Prodigious wrote: Here's an unconditional solution ......... Wow. you make me happy. OC I tried to refute your solution but the next variant for fails. Click Here To Show Diagram Code `[go]$$Bc a&b are miai for B after this sequence $$ +--------------------- $$ \| . X . . . . . . . . $$ \| O O O O O X . X . . $$ \| O X X O X X . . . . $$ \| X . X X O O . X X , $$ \| . X X O B . O O . . $$ \| . 2 3 O . . . . . . $$ \| . O 1 O b O . . . . $$ \| . a 4 5 . . . . . . $$ \| . . . . . . . . . .[/go]` That is why the marked B stone is essential

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