Computer Chess Club Archives




Subject: Re: Possible alternative analysis for WAC.230...

Author: Dann Corbit

Date: 22:27:48 04/12/01

Go up one level in this thread

On April 13, 2001 at 00:39:03, Dann Corbit wrote:

>On April 12, 2001 at 20:09:44, Alex Szabo wrote:
>>On April 12, 2001 at 15:06:03, Jeremiah Penery wrote:
>>>On April 12, 2001 at 10:45:23, Alex Szabo wrote:
>>>>What is the accepted list of corrections to the "Win at Chess" problems?
>>>>Here's my list; can anyone suggest additional corrections (or corrections
>>>>to my corrections)?
>>>>	#230		Rb7-a7			additional solution
>>>>			Rb7-b5			additional solution
>>>>			Rb7-b6			additional solution
>>>>			Rb7-d7			additional solution
>>>>			Rb7-f7			additional solution
>>>>			Rb7-g7			additional solution
>>>>			Rb7-h7			additional solution
>>>>			Kc6-b5			additional solution
>>>>			Kc6-b6			additional solution
>>>>			Kc6-d7			additional solution
>>>>			Bc8-d7			additional solution
>>>>			a5-a4			additional solution
>>>>			Rb7-c7			additional solution
>>>I don't agree.
>>>>#230	[Rb4 does not win.  The main line is,  1... Rb4!?  2. cxb4 a4
>>>>	3. b5+ Kxb5  4. Ba3 c3  5. Re2! Kc4  6. f4 Kxd4  7. f5 exf5  8. e6 Kd3
>>>I think 7. ... Ba6 might be better than exf5.  The white rook is forced to move
>>>off his nice square.  More on this later tonight when I have time.
>>>>	9. e7 Bd7  10. Kf3 d4  11. Rh2 Kc4  12. Rh8 b2  13. Rb8 d3
>>>>	14. Bxb2 cxb2  15. Rxb2 a3  16. Rb7 Be8  17. Ra7 Kb3  18. Ke3 a2
>>>>	19. Kxd3 Kb2  20. Rb7+ Kc1  21. Ra7 =]
>>>>	Ra7, Rb6, Rb5, Rd7, Rf7, Rg7, Rh7, Bd7, Kd7, Kb6, Kb5, a4, and Rc7
>>>>	are just as good as the book solution Rb4 -- they all hold the game.
>>If 7...Ba6 then 8.Rh2 holds the game.
>How about this pv: Rb4 cxb4 a4 b5+ Kxb5 {NOT Ba3 here} Rb1 c3 Ba3 Kc4 Kf4 Kxd4
>f3 Kd3 Rd1+ Kc4 Rc1 d4 Ke4 Bd7 Bb2 Bc6+ Kf4 Kb4 Ba1

Also, supposing the Ba3 continuation...
Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2 Kc4 f4 Kxd4 f5 exf5 e6 Kc4 e7 Bd7 e8=Q Bxe8 Rxe8
d4 Rc8+ Kd3 Bb2

More to come.

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