Analysis of 9-13 23-18 6-9 26-23 10-14

Discussion and analysis about openings.

Analysis of 9-13 23-18 6-9 26-23 10-14

Postby Ed Gilbert on Sat Apr 28, 2007 3:31 pm

Someone asked for kingsrow's help in determining whether this line (given as a probable white win in Basic Checkers) is a draw or a white win. I put the opening book generator on it for a few hours, and have updated the book10 file on my web page with the new analysis. The position is a narrow draw. Below are a few games from the Open Checkers Archive in which this line was played, along with some analysis from book10. Link to book10.

-- Ed

[Event "Florida Open 1984"]
[Date "1984-??-??"]
[Black "Lowder, E."]
[White "Balderson, L.A."]
[Result "1/2-1/2"]
1. 9-13 23-18 2. 6-9 26-23 3. 10-14 24-19 4. 7-10
{Loses. 11-16 is the only move to draw.} 18-15 5. 11x18 22x6 6. 1x10 25-22 7. 8-11 22-18
{Draws. 28-24 wins.} 8. 13-17 19-15 9. 10x26 31x6 10. 2x9 29-25 11. 14x23 27x18 12. 9-14
18x9 13. 5x14 25-22 14. 11-15 28-24 15. 4-8 22-17 16. 14-18 17-14 17. 18-23 14-10 18. 8-11
10-6 19. 12-16 24-20 20. 15-19 6-2 21. 23-26 30x23 22. 19x26 2-6 23. 16-19 6-10 24. 19-23
32-28 25. 26-31 28-24 26. 3-8 24-19 27. 8-12 10-7 28. 31-27 7x16 29. 27-24 19-15 1/2-1/2

[Event "US National 1984"]
[Date "1984-??-??"]
[Black "Laverty, T."]
[White "Balderson, L.A."]
[Result "0-1"]
1. 9-13 22-18 2. 6-9 26-22 3. 10-14 24-19 4. 11-16 30-26 5. 8-11 {Probably loses. 16-20 draws.}
22-17 6. 13x22 26x10 7. 7x14 28-24 {Draws. 25-22 wins.} 8. 16-20 19-15 9. 3-7 15x8 10. 4x11
24-19 11. 7-10 25-22 12. 9-13 {Loses. 2-7 draws.} 18x9 13. 5x14 22-18 14. 1-5 18x9 15. 5x14
29-25 16. 11-16 25-22 17. 2-7 22-18 18. 14-17 21x14 19. 10x17 19-15 20. 17-22 18-14 0-1

[Event "Florida Open 1987"]
[Date "1987-??-??"]
[Black "Lowder, E."]
[White "Burroughs, R."]
[Result "0-1"]
1. 9-13 23-18 2. 6-9 26-23 3. 10-14 24-19 4. 7-10 {Loses. 11-16 draws.} 18-15 5. 11x18 22x6
6. 1x10 25-22 7. 8-11 22-18 {Draws. 28-24 wins.} 8. 13-17 28-24 9. 3-7
{Loses. 3-8 probably draws.} 24-20 10. 17-22 30-25 11. 4-8 32-28 12. 2-6 28-24 13. 14-17
21x14 14. 10x17 18-14 15. 9x18 23x14 16. 6-10 25x18 17. 17-22 27-23 18. 10x17 18-14 19.
17-21 23-18 20. 22-26 31x22 21. 21-25 19-15 22. 25-30 22-17 23. 30-26 15-10 0-1

[Event "British Open 1994"]
[Date "1994-??-??"]
[Black "Roberts, D."]
[White "McCarrick, C."]
[Result "1-0"]
1. 9-13 23-18 2. 6-9 26-23 3. 10-14 24-19 4. 11-16 30-26 5. 8-11 {Probably loses. 16-20 draws.}
28-24 {Draws. 22-17 wins.} 6. 16-20 18-15 7. 11x18 22x15 8. 4-8 26-22 9. 7-10 15x6 10. 1x10
22-18 {Loses. 23-18 draws.} 11. 2-6 25-22 12. 3-7 {Draws. 8-11 wins.} 18-15
{Loses. 32-28 draws.} 13. 14-18 23x14 14. 9x25 29x22 15. 7-11 1-0
Ed Gilbert
 
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Re: Analysis of 9-13 23-18 6-9 26-23 10-14

Postby Alex_Moiseyev on Sat Apr 28, 2007 5:27 pm

As far as I know - from American expert level players, only Elbert Lowder and Tim Lavert played this move 10-14.

Alex
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Re: Analysis of 9-13 23-18 6-9 26-23 10-14

Postby Patrick Parker on Sat Apr 28, 2007 8:31 pm

............
Last edited by Patrick Parker on Sun Jun 10, 2007 2:28 am, edited 1 time in total.
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Re: Analysis of 9-13 23-18 6-9 26-23 10-14

Postby rich beckwith on Tue May 01, 2007 5:51 pm

I've seen Cowie use this defense too, although I recall this was a practice game, but perhaps he would play it in a tournament too, if it came up.
Richard Beckwith
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