[Retros] CC game

[Göran Wicklund]

Possible (?) extension:
 
39. [x][++]
40, [][]
41. [][++]
42. [x][+]
43. [][+]
44. [][+]
45. [][]
46. [][++]
47. [][+]
48. [][++]
49. [x][+]
50. [][#]
 
/Göran

________________________________

From: retros-bounces at janko.at [mailto:retros-bounces at janko.at] On Behalf Of Göran Wicklund
Sent: den 11 november 2009 08:12
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] CC game


In my intended solution, there are two double checks. I forgot to indicate those:
 
35. ..[+]
36. [][+]
37. [][++]
38. [x][+]
39. [x][++]
40. [x][]
41. [][#]
 
If correct, it may be possible to add an extra double check:
 
39. [x][++]
40, [][]
41. [][++]
42. [x][]
43. [][#]
 
/Göran
 
 

________________________________

From: retros-bounces at janko.at [mailto:retros-bounces at janko.at] On Behalf Of ??????? ???????
Sent: den 10 november 2009 19:06
To: retros at janko.at
Subject: [Retros] CC game


Dear Goran,


>Could this possibly be a correct extension from 35.[x]?:

> 

>35. ..[+]

>36. [][+]

>37. [][+]

>38. [x][+]

>39. [x][+]

>40. [x][]

>41. [][#]


The computer states that there are several ways to finish the game like this, e.g. 

35. ... Bc8-b7+ 36.Kc6-b5 Pa7-a6+ 37.Kb5-b6 Bg3-c7+ 38.Kb6xc7 Ra8-c8+ 39.Kc7xb7 Rc8-b8+ 40.Kb7xa6 Kd4-c5 41.Ka6-a5 Rb8-a8#

35. ... Bc8-b7+ 36.Kc6-d7 Bb7-c8+ 37.Kd7-e8 Bc8-d7+ 38.Ke8xf7 Bd7-e8+ 39.Kf7xg7 Bg3-e5+ 40.Kg7xg8 Be5-f6 41.Kg8-f8 Be8-g6#

and some more.

As for double checks, I think that there is a unique beginning that contains 4. ... [++] 5. [] [+] 6. [x] [x+] and then possibly 7. [][] 8. [x+][x] 9. [][#], but this was done by hand, so I cannot be 100% sure.

Best wishes,
Nikolai



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