|
|
| (1) Posted by Hauke Reddmann [Tuesday, Aug 26, 2014 14:19]; edited by Hauke Reddmann [14-08-26] |
Fivefold repetition :-)
This is another free-for-all construction task. In one of my Hamburg ch games,
I nearly had twice the capture Sb6xRa8. Anyway, lets stick to moves that can't be
repeated infinitely often.
Without promotions, you can easily have Pd4xPe5 fivefold (bcdef pawns for White,
cdefg for Black, 6 captures to get them there). You can have some promotion sevenfold,
and a capture R/S x R/S even tenfold. Since R should be faster, anyone taking the job to
construct a SPG where wRd8xsRd1 (or whatnot) is played ten times? (It's possible without
a problem, since you just have to jettison all S and B to get the P running.)
Hauke
|
|
| (2) Posted by seetharaman kalyan [Tuesday, Aug 26, 2014 22:05] |
I think it will be impossible to force 8 rook promotions in a proof game if none of the promoted rooks should be present on the diagram. (leave alone having them all captured them on the same square.).
|
|
| (3) Posted by Hauke Reddmann [Wednesday, Aug 27, 2014 11:29] |
Clarification: I didn't ask for a *unique* SPG, just for a record attempt.
Hauke
|
|
| (4) Posted by Geir Sune Tallaksen Østmoe [Wednesday, Aug 27, 2014 11:39] |
So basically, the shortest possible game that involves 10 identical moves, e.g. wRd8xbRd1?
|
|
| (5) Posted by Hauke Reddmann [Wednesday, Aug 27, 2014 18:42] |
Yup. I guess fairly similar things (especially the part with
getting the pawns free fastest) have been done, so a first
attempt should be easy.
|
|
| (6) Posted by Geir Sune Tallaksen Østmoe [Thursday, Aug 28, 2014 20:57] |
1. e4 c5 2. e5 Qb6 3. e6 f6 4. exd7+ Kf7 5. d8=R Qxd8 6. a4 b5 7. axb5 Nc6 8.
bxc6 Bd7 9. cxd7 Qb6 10. d8=R Qxd8 11. g4 a5 12. g5 a4 13. gxf6 Qb6 14. fxe7
Rd8 15. exd8=R Qxd8 16. h4 Bd6 17. h5 Ne7 18. h6 a3 19. hxg7 a2 20. g8=R Qb6
21. Rd8 Qxd8 22. b4 axb1=R 23. bxc5 h5 24. cxd6 h4 25. d7 Qb6 26. d8=R Qxd8 27.
f4 h3 28. f5 h2 29. f6 Qb6 30. fxe7 Rd8 31. exd8=R Qxd8 32. c4 hxg1=R 33. c5
Rb7 34. c6 Rd7 35. cxd7 Qb6 36. d8=R Qxd8 37. d4 Kf6 38. d5 Kf7 39. d6 Kf6 40.
d7 Qb6 41. d8=R Qxd8 42. Rh8 Qb6 43. Rd8 Qxd8 44. Ra8 Qb6 45. Rd8 Qxd8
Ten times bQb6xwRd8. I think this must be the fastest possible: 40 pawn moves leading to 8 promotions, 1 extra move for the most distant pawn (all 8 cannot reach the same square, since it would require 16 captures), 2 moves for Ra1 and 2 moves for Rh1.
|
|
| (7) Posted by Geir Sune Tallaksen Østmoe [Thursday, Aug 28, 2014 21:02] |
Or did you mean both players should promote all their pawns and exchange all the rooks?
|
|
| (8) Posted by Hauke Reddmann [Friday, Aug 29, 2014 13:19] |
No, technically you cheated :-) but I simply didn't think about
that only the massacred site has to promote to provide a constant
stream of victims, so your attempt is absolutely legit.
THX!
Hauke
|
|
| (9) Posted by Geir Sune Tallaksen Østmoe [Friday, Aug 29, 2014 20:05] |
If you want both sides to promote, the task could be to achieve the same capture 19 times, ignoring colours. For example, Rd8xRd1 19 times, 10 by White and 9 by Black (or vice versa).
|
|
No more posts |
MatPlus.Net  Forum General Fivefold repetition :-) |
ISC 2024
