New draw found in the 5-9 Double Cross

Discussion and analysis about openings.

New draw found in the 5-9 Double Cross

Postby Ed Gilbert on Sat Apr 15, 2006 5:32 pm

The kingsrow program with the 10-piece database has found a new draw in the Double Cross. After 9-14 23-18 14x23 27x18 5-9, now 24-20 draws in addition to the previously published 26-23. I have put a new opening book file on my web site that has approximately 500 positions supporting this 24-20 drawing move. When kingsrow plays using this alternate book file, it will defend this line by always forcing play into positions where kr/10 can see a draw.

Here is a link to my web site

-- Ed
Ed Gilbert
 
Posts: 127
Joined: Mon Nov 14, 2005 7:37 am
Location: Morristown, New Jersey

Re: New draw found in the 5-9 Double Cross

Postby Ed Gilbert on Sun Apr 16, 2006 7:50 am

As a demonstration of some of the play on the 24-20 draw, I set checkerboard up with Cake playing black and kr/10 + book10 defending white. Cake was using its 500k move book that Martin provided for the big engine match last year. I played 3 games at 2min/move. In the first game, Cake played 12-16 after 24-20. In the other 2 games I forced Cake to attack with a different move at that point and then let the programs select the moves from there.

[Event "Double Cross ...5-9 24-20 12-16"]
[Black "CakeM 1.09d"]
[White "KingsRow 1.15u/10pc + book10"]
[Result "1/2-1/2"]
1. 9-14 23-18 2. 14x23 27x18 3. 5-9 24-20 4. 12-16 26-23 5. 8-12 28-24 6. 3-8 30-26 7. 1-5
31-27 8. 16-19 24x15 9. 10x19 23x16 10. 12x19 18-14 11. 9x18 22x15 12. 11x18 27-23 13.
18x27 32x16 14. 8-12 16-11 15. 7x16 20x11 16. 12-16 25-22 17. 16-19 22-17 18. 19-24 17-13
19. 24-27 26-23 20. 27-31 23-19 21. 31-26 19-16 22. 26-23 16-12 23. 6-10 12-8 24. 10-15
29-25 25. 15-18 8-3 26. 23-26 21-17 27. 26-22 25-21 28. 18-23 3-7 29. 23-26 7-10 30. 26-30
10-15 31. 30-25 15-19 32. 22-18 19-16 33. 18-23 16-12 34. 25-22 12-16 35. 22-18 16-12 36.
23-27 12-16 37. 27-24 16-12 38. 24-19 12-8 39. 18-22 8-12 40. 22-25 1/2-1/2

[Event "Double Cross ...5-9 24-20 10-15"]
[Black "CakeM 1.09d"]
[White "KingsRow 1.15u/10pc + book10"]
[Result "1/2-1/2"]
1. 9-14 23-18 2. 14x23 27x18 3. 5-9 24-20 4. 10-15 28-24 5. 7-10 21-17 6. 3-7 17-13 7. 1-5
25-21 8. 12-16 32-28 9. 16-19 26-23 10. 19x26 30x23 11. 9-14 18x9 12. 5x14 22-17 13. 15-18
24-19 14. 18x27 31x24 15. 11-15 19-16 16. 8-12 16-11 17. 7x16 20x11 18. 12-16 29-25 19.
16-19 24-20 20. 15-18 20-16 21. 18-23 16-12 22. 23-26 12-8 23. 26-31 25-22 24. 31-26 8-3
25. 26-30 3-7 26. 30-25 22-18 27. 14x23 7x14 28. 25-22 14-9 29. 23-26 11-7 30. 2x11 9x2
31. 11-16 2-7 32. 4-8 7-10 33. 19-23 17-14 34. 23-27 14-9 35. 16-19 9-5 36. 26-31 5-1 37.
19-23 1-6 38. 27-32 21-17 39. 32-27 17-14 40. 23-26 1/2-1/2

[Event "Double Cross ...5-9 24-20 11-15"]
[Black "CakeM 1.09d"]
[White "KingsRow 1.15u/10pc + book10"]
[Result "1/2-1/2"]
1. 9-14 23-18 2. 14x23 27x18 3. 5-9 24-20 4. 11-15 18x11 5. 8x15 22-18 6. 15x22 25x18 7.
3-8 28-24 8. 7-11 26-23 9. 10-15 30-26 10. 15x22 26x17 11. 11-15 29-25 12. 6-10 17-13 13.
1-6 21-17 14. 15-19 24x15 15. 10x26 31x22 16. 2-7 32-27 17. 7-10 27-23 18. 9-14 25-21 19.
12-16 20x11 20. 8x15 22-18 21. 15x22 23-19 22. 22-26 1/2-1/2

-- Ed
Ed Gilbert
 
Posts: 127
Joined: Mon Nov 14, 2005 7:37 am
Location: Morristown, New Jersey


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