1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20
I have expanded this Gemini 1 line using the 10-piece kingsrow, and added the new play to the book10 opening book that can be downloaded from the kingsrow web site. This 16-20 defense is a draw, but it has been misplayed in many mail play games. I did a search of a large database of games and found 11 games where white followed with 24-19, and in 10 of those games red replied with a losing move (8-11). 7-10 is the only move shown to draw there.
-- Ed
Gemini 1 line
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Ed Gilbert
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Re: Gemini 1 line
In Gemini 1 after 1620 2429 811? (Ed you say 710*) what is the nxt move for white to win/
Always read "Cannings Compilation 2nd Edition" every day.
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Ed Gilbert
- Posts: 145
- Joined: Mon Nov 14, 2005 7:37 am
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Re: Gemini 1 line
Hi Tommyc,
After 16-20 24-19 8-11, then 21-17 is the only move that wins. In the 10 games where 8-11 was played, white followed in most of them with 26-23. Here are those 10 games with my comments inserted:
[Event "Wood's Ladder 1996"]
[Black "T Sheehan"]
[White "RS Podoff"]
[Result "1/2-1/2"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 18-14 18. 17-22 23-18 19. 22-25 14-9 20. 25-30 9-6 21. 30-25 1/2-1/2
[Event "Wood's Ladder 1996"]
[Black "RS Podoff"]
[White "T Sheehan"]
[Result "1/2-1/2"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 18-14 18. 17-22 23-18 19. 22-25 14-9 20. 25-30 9-6 21. 30-25 1/2-1/2
[Event "Wood's Ladder 1997"]
[Black "E Zuber"]
[White "GI Miller"]
[Result "0-1"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 21-17 7. 7-10 17-13 8. 9-14 18x9 9. 5x14 13-9 {Only draws. 29-25 wins} 10. 11-15 29-25 11. 15x24 28x19 12. 14-17 {Loses. 4-8 draws.} 25-22 13. 17-21 27-23 14. 20-24 23-18 0-1
[Event "WMCM 1998; game 6"]
[Black "GI Miller"]
[White "J Childers"]
[Result "1/2-1/2"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 27-23 {Draws. 21-17 maintains the WW.} 7. 7-10 29-25 8. 11-16 25-22 1/2-1/2
[Event "ID 1998"]
[Black "B Vanderpool"]
[White "C Marshall"]
[Result "1/2-1/2"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 18-14 18. 17-22 14-9 19. 7-10 9-6 20. 10-14 23-18 21. 14x23 27x18 22. 8-11 6-2 23. 11-16 19-15 24. 16-19 15-10 25. 19-23 2-7 26. 23-26 7-11 27. 26-30 11-15 28. 12-16 10-6 29. 30-26 18-14 30. 26-30 6-2 31. 30-25 31-27 32. 22-26 1/2-1/2
[Event "ID 2000"]
[Black "B Vanderpool"]
[White "S Gardner"]
[Result "1/2-1/2"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 21-17 7. 11-15 18x11 8. 7x23 26x19 {Only draws. 27-18 wins.} 9. 3-7 29-25 10. 4-8 25-22 11. 7-10 19-15 12. 10x19 27-24 13. 20x27 31x15 14. 1-6 22-18 15. 12-16 1/2-1/2
[Event "ID 2000"]
[Black "J Loy"]
[White "S Gardner"]
[Result "1/2-1/2"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 18-14 18. 17-22 23-18 19. 22-25 14-9 20. 25-30 9-6 21. 30-25 6-2 22. 7-11 18-14 23. 25-22 14-9 24. 11-16 19-15 25. 16-19 9-6 26. 12-16 15-10 27. 19-24 6-1 28. 22-26 31x22 29. 24x31 1-6 30. 31-26 22-17 31. 16-19 17-13 32. 19-23 6-9 1/2-1/2
[Event "ID 2000"]
[Black "B Vanderpool"]
[White "LA Balderson"]
[Result "1/2-1/2"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 19-15 18. 17-22 15-10 19. 7x14 18x9 20. 22-25 9-6 21. 25-30 6-2 22. 8-11 23-19 23. 30-25 2-6 24. 25-22 6-10 25. 11-15 32-28 26. 15x24 28x19 27. 22-25 10-14 28. 25-22 27-24 29. 20x27 31x24 30. 22-25 14-18 31. 25-21 18-22 32. 3-8 1/2-1/2
[Event "ID 2000"]
[Black "J Loy"]
[White "LA Balderson"]
[Result "1/2-1/2"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 19-15 18. 17-22 15-10 19. 7x14 18x9 20. 22-25 9-6 21. 25-29 6-2 22. 29-25 23-18 23. 25-22 18-15 24. 12-16 2-6 25. 3-7 6-2 26. 7-11 32-28 27. 11x18 31-26 28. 22x24 28x3 1/2-1/2
[Event "ID 2000"]
[Black "J Loy"]
[White "T Sheehan"]
[Result "0-1"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 21-17 7. 7-10 17-13 8. 1-6 19-16 9. 12x19 27-24 10. 20x27 32x7 11. 2x11 29-25 12. 11-16 28-24 13. 3-8 26-23 14. 16-20 23-19 15. 20x27 31x24 16. 8-12 25-22 0-1
After 16-20 24-19 8-11, then 21-17 is the only move that wins. In the 10 games where 8-11 was played, white followed in most of them with 26-23. Here are those 10 games with my comments inserted:
[Event "Wood's Ladder 1996"]
[Black "T Sheehan"]
[White "RS Podoff"]
[Result "1/2-1/2"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 18-14 18. 17-22 23-18 19. 22-25 14-9 20. 25-30 9-6 21. 30-25 1/2-1/2
[Event "Wood's Ladder 1996"]
[Black "RS Podoff"]
[White "T Sheehan"]
[Result "1/2-1/2"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 18-14 18. 17-22 23-18 19. 22-25 14-9 20. 25-30 9-6 21. 30-25 1/2-1/2
[Event "Wood's Ladder 1997"]
[Black "E Zuber"]
[White "GI Miller"]
[Result "0-1"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 21-17 7. 7-10 17-13 8. 9-14 18x9 9. 5x14 13-9 {Only draws. 29-25 wins} 10. 11-15 29-25 11. 15x24 28x19 12. 14-17 {Loses. 4-8 draws.} 25-22 13. 17-21 27-23 14. 20-24 23-18 0-1
[Event "WMCM 1998; game 6"]
[Black "GI Miller"]
[White "J Childers"]
[Result "1/2-1/2"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 27-23 {Draws. 21-17 maintains the WW.} 7. 7-10 29-25 8. 11-16 25-22 1/2-1/2
[Event "ID 1998"]
[Black "B Vanderpool"]
[White "C Marshall"]
[Result "1/2-1/2"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 18-14 18. 17-22 14-9 19. 7-10 9-6 20. 10-14 23-18 21. 14x23 27x18 22. 8-11 6-2 23. 11-16 19-15 24. 16-19 15-10 25. 19-23 2-7 26. 23-26 7-11 27. 26-30 11-15 28. 12-16 10-6 29. 30-26 18-14 30. 26-30 6-2 31. 30-25 31-27 32. 22-26 1/2-1/2
[Event "ID 2000"]
[Black "B Vanderpool"]
[White "S Gardner"]
[Result "1/2-1/2"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 21-17 7. 11-15 18x11 8. 7x23 26x19 {Only draws. 27-18 wins.} 9. 3-7 29-25 10. 4-8 25-22 11. 7-10 19-15 12. 10x19 27-24 13. 20x27 31x15 14. 1-6 22-18 15. 12-16 1/2-1/2
[Event "ID 2000"]
[Black "J Loy"]
[White "S Gardner"]
[Result "1/2-1/2"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 18-14 18. 17-22 23-18 19. 22-25 14-9 20. 25-30 9-6 21. 30-25 6-2 22. 7-11 18-14 23. 25-22 14-9 24. 11-16 19-15 25. 16-19 9-6 26. 12-16 15-10 27. 19-24 6-1 28. 22-26 31x22 29. 24x31 1-6 30. 31-26 22-17 31. 16-19 17-13 32. 19-23 6-9 1/2-1/2
[Event "ID 2000"]
[Black "B Vanderpool"]
[White "LA Balderson"]
[Result "1/2-1/2"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 19-15 18. 17-22 15-10 19. 7x14 18x9 20. 22-25 9-6 21. 25-30 6-2 22. 8-11 23-19 23. 30-25 2-6 24. 25-22 6-10 25. 11-15 32-28 26. 15x24 28x19 27. 22-25 10-14 28. 25-22 27-24 29. 20x27 31x24 30. 22-25 14-18 31. 25-21 18-22 32. 3-8 1/2-1/2
[Event "ID 2000"]
[Black "J Loy"]
[White "LA Balderson"]
[Result "1/2-1/2"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 26-23 {Draws. 21-17 maintains the WW.} 7. 9-14 18x9 8. 5x14 29-25 9. 7-10 25-22 10. 11-15 30-26 11. 15x24 28x19 12. 4-8 22-18 13. 1-5 18x9 14. 5x14 26-22 15. 2-7 22-18 16. 14-17 21x14 17. 10x17 19-15 18. 17-22 15-10 19. 7x14 18x9 20. 22-25 9-6 21. 25-29 6-2 22. 29-25 23-18 23. 25-22 18-15 24. 12-16 2-6 25. 3-7 6-2 26. 7-11 32-28 27. 11x18 31-26 28. 22x24 28x3 1/2-1/2
[Event "ID 2000"]
[Black "J Loy"]
[White "T Sheehan"]
[Result "0-1"]
1. 10-14 22-17 2. 11-16 17x10 3. 6x15 23-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 {Loses. 7-10 draws.} 21-17 7. 7-10 17-13 8. 1-6 19-16 9. 12x19 27-24 10. 20x27 32x7 11. 2x11 29-25 12. 11-16 28-24 13. 3-8 26-23 14. 16-20 23-19 15. 20x27 31x24 16. 8-12 25-22 0-1
Last edited by Ed Gilbert on Wed Aug 23, 2006 11:11 am, edited 1 time in total.
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Alex_Moiseyev
- Posts: 4341
- Joined: Sat Nov 12, 2005 5:03 pm
- What do you like about checkers?: .....
Re: Gemini 1 line
Ed Gilbert wrote:then 21-17 is the only move that wins
Hi, Tommy and Ed !
This move, 21-17, has very logical strategic explanation. White immediately tries to occupy very important square - 13, which minimize mobility (freedom) of red rigth flank. Along with white man on 19 - this is "keeling tandem", which puts red position in grave.
It is clear now, why red should play 7-10 instead 8-11 - to stop 21-17!
It is impossible for human to calculate anything in this position
, but if you understand strategy, you would play 21-17 without much thinking.Alex
I am playing checkers, not chess.
Re: Gemini 1 line
An excellent deduction Alex...............i guess thats why your a great player!!...Thanks Tommy
Always read "Cannings Compilation 2nd Edition" every day.
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Patrick Parker
- Posts: 959
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- Contact:
Re: Gemini 1 line
interesting 21-17 was played here
[Event "Wood's Mail Play Ladder 1997"]
[Date "1997-??-??"]
[Black "Zuber, G."]
[White "Miller, G.I."]
[Result "0-1"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 21-17 7.
7-10 17-13 8. 9-14 18x9 9. 5x14 13-9 10. 11-15 29-25 11. 15x24 28x19 12. 14-17 25-22 13.
17-21 27-23 14. 20-24 23-18 *
[Event "Wood's Mail Play Ladder 1997"]
[Date "1997-??-??"]
[Black "Zuber, G."]
[White "Miller, G.I."]
[Result "0-1"]
1. 10-15 23-19 2. 11-16 19x10 3. 6x15 22-18 4. 15x22 25x18 5. 16-20 24-19 6. 8-11 21-17 7.
7-10 17-13 8. 9-14 18x9 9. 5x14 13-9 10. 11-15 29-25 11. 15x24 28x19 12. 14-17 25-22 13.
17-21 27-23 14. 20-24 23-18 *