Not logged inRybka Chess Community Forum
Forum RybkaChess Help Search Register Login
Up Topic The Rybka Lounge / Test Positions / What is the fastest mate in this position ?
- - By sensei (*) [fr] Date 2012-02-25 21:26
8/8/r7/P3k3/R4p2/5K2/5P2/8 w - - 0 61


H 2.0c found #37.

Do you find a fastest mate ?
Parent - - By Barnard (Bronze) Date 2012-02-25 21:45
why you dont gave the complete line/analisis by Houdini 2.0?without that,you results havent any validity,you can simply invent it
Parent - - By sensei (*) [fr] Date 2012-02-25 22:02
Believe me :wink:

1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke5 5.Ra4 Kd5 6.Ke3 Re6+ 7.Kd3 Ra6 8.f4 Kc5 9.Re4 Rd6+ 10.Ke3 Rf6 11.Re5+ Kb4 12.Ke4 Kc4 13.f5 Ra6 14.Rd5 Rf6 15.Rd4+ Kc5 16.Rd1 Kb5 17.Ra1 Ka6 18.Ke5 Rc6 19.f6 Rc5+ 20.Kd6 Rf5 21.Ke6 Rf2 22.Re1 Kxa5 23.f7 Kb4 24.Re5 Rxf7 25.Kxf7 Kb3 26.Rc5 Kb4 27.Rc8 Kb5 28.Ke6 Kb4 29.Kd5 Kb3 30.Rc4 Kb2 31.Kd4 Kb3 32.Kd3 Kb2 33.Rc3 Kb1 34.Rc2 Ka1 35.Kc3 Kb1 36.Kb3 Ka1 37.Rc1#
Parent - By Barnard (Bronze) Date 2012-02-25 22:24
ok,now i trust you :smile:
Parent - By Barnard (Bronze) Date 2012-02-25 22:29
just one question;seems that you are interested in positions that has 7 pieces,so why you dont download the 7 pieces endgame tablebase generator?
Parent - - By Barnard (Bronze) Date 2012-02-25 23:01
mate,just one more question:how you found a s long mate,and gave a so long line,and you can be sure that you didnt made any error?did you use tablebases (nalimov,gaviota,etc...)to found that mate?

because if you are telling people to find a faster check mate using Houdini 2.0 c,and you forget told people you used tablebases,that is a type of cheating and wasting people's time
Parent - - By sensei (*) [fr] Date 2012-02-25 23:09
I used 6-men tablebases but I have a slow computer.
Parent - - By Barnard (Bronze) Date 2012-02-25 23:13 Edited 2012-02-25 23:21
sorry,but i can understand that...you have the complet 6 tablebases,and you can upload it in a slow computer?

edit:what you mean by a 'slow computer'?can you please tell me what computer?
Parent - - By TheHug (Bronze) [us] Date 2012-02-25 23:16
Each person has a different meaning to what a slow computer, he could just have a slow quad. Which would be better than what you or I have.
Parent - By Barnard (Bronze) Date 2012-02-25 23:20
you are right...im gonna reformulate my question to him
Parent - - By kgburcham (***) [us] Date 2012-02-26 04:22
8/8/r7/P3k3/R4p2/5K2/5P2/8 w - - 0 1


12 processor(s) found, POPCNT available
NUMA configuration with 2 node(s), offset 0
4096 MB Large Page Hash
Nalimov 6 men EGTB available - 512 MB cache
Deep Rybka 4.1 SSE42 x64:

1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Rc6 4.a6[] Rc3+ 5.Kg2[] Rc8 6.a7 Rd8 7.a8Q Rxa8 8.Rxa8 Kf5 9.Kf3 Kg6 10.Kxf4 Kf7 11.Ke5 Kg6 12.f4
  +-  (15.65)   Depth: 14   00:00:00  739kN, tb=69
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Rh4 Kc5 7.Rh5+
  +-  (#38)   Depth: 15   00:00:01  2354kN, tb=95
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Rh4 Kc5 7.Rh5+
  +-  (#38)   Depth: 16   00:00:01  2551kN, tb=115
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Kf5 4.Rxf4+[] Ke6 5.Ra4 Kd5 6.Rh4 Kc5 7.Rh5+
  +-  (#38)   Depth: 17   00:00:01  2813kN, tb=140
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Kf5 4.Rxf4+[] Ke6 5.Ra4 Kd5 6.Rh4 Kc5 7.Rh5+
  +-  (#38)   Depth: 18   00:00:01  2892kN, tb=157
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Kf5 4.Rxf4+ Ke6 5.Ra4 Kd6 6.Ke3 Kc5 7.Rg4
  +-  (#38)   Depth: 19   00:00:02  3414kN, tb=227
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra3 Rc6 4.a6 Kh4 5.a7 Kh3 6.a8Q Rh6 7.Qe4
  +-  (#38)   Depth: 20   00:00:02  3884kN, tb=292
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra3 Rh6 4.Ra1 Rh3+ 5.Ke4 Rh2 6.a6 Rxf2 7.Rg1+ Kf6 8.a7 Ra2
  +-  (#38)   Depth: 21   00:00:02  4770kN, tb=397
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra3 Kf6 4.Kxf4 Ke6 5.Ke4 Kd6 6.f4 Kc5 7.Ra2
  +-  (#38)   Depth: 22   00:00:03  6257kN, tb=555
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra3 Kf6 4.Kxf4 Ke6 5.Ke4 Kd6 6.f4 Kc5 7.Ra2
  +-  (#38)   Depth: 23   00:00:04  8368kN, tb=778
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Kf5 4.Rxf4+ Ke6 5.Ra4 Kd6 6.Ke3 Kc5 7.Rg4
  +-  (#38)   Depth: 24   00:00:05  10054kN, tb=973
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Kf5 4.Rxf4+ Ke6 5.Ra4 Kd6 6.Ke3 Kc5 7.Rg4
  +-  (#38)   Depth: 25   00:00:06  12422kN, tb=1325
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra3 Kf6 4.Kxf4 Ke6 5.Ke4 Kd6 6.f4 Kc5 7.Ra2
  +-  (#38)   Depth: 26   00:00:08  16248kN, tb=2452
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra3 Kf6 4.Kxf4 Ke6 5.Ke4 Kd6 6.f4 Kc5 7.Ra2
  +-  (#38)   Depth: 27   00:00:11  21596kN, tb=3989
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra3 Kf6 4.Kxf4 Ke6 5.Ke4 Kd6 6.f4 Kc5 7.Ra2
  +-  (#38)   Depth: 28   00:00:14  28037kN, tb=7034
1.Ra1 Kf5 2.Ra2[] Kg5 3.Ra4[] Kf5 4.Rxf4+ Ke6 5.Ra4 Kd6 6.Ke3 Kc5 7.Rg4
  +-  (#38)   Depth: 29   00:00:19  39046kN, tb=11668
1.Kg4 Rg6+ 2.Kh5 Ra6 3.Kg5 Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.Rf6 Rg7+ 7.Rg6 Ra7 8.a6 Kd4
  +-  (#33)   Depth: 29   00:00:54  105mN, tb=33693
1.Kg4 Rg6+ 2.Kh5 Ra6 3.Kg5[] Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.Rf6 Rg7+ 7.Rg6 Ra7 8.a6 Kd4
  +-  (#35)   Depth: 30   00:00:54  106mN, tb=34443
1.Kg4 Rg6+ 2.Kh5 Ra6 3.Kg5[] Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.Rf6 Rg7+ 7.Rg6 Ra7 8.a6 Kd4
  +-  (#35)   Depth: 31   00:01:02  124mN, tb=42123
1.Kg4 Rg6+ 2.Kh5[] Ra6 3.Kg5[] Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.Rf6 Rg7+ 7.Rg6 Ra7 8.a6 Kd4
  +-  (#35)   Depth: 32   00:01:22  166mN, tb=64869
1.Kg4 Rg6+ 2.Kh5[] Ra6 3.Kg5[] Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.Rf6 Rg7+ 7.Rg6 Ra7 8.a6 Kd4
  +-  (#35)   Depth: 33   00:01:34  189mN, tb=77722
1.Kg4 Rg6+ 2.Kh5[] Ra6 3.Kg5[] Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.Rf6 Rg7+ 7.Rg6 Ra7 8.a6 Kd4
  +-  (#35)   Depth: 34   00:01:50  227mN, tb=101703
1.Kg4 Rg6+ 2.Kh5[] Ra6 3.Kg5[] Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.Rf6 Rg7+ 7.Rg6 Ra7 8.a6 Kd4
  +-  (#35)   Depth: 35   00:02:12  276mN, tb=127696
1.Kg4 Rg6+ 2.Kh5[] Ra6 3.Kg5[] Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.a6 Rg7+
  +-  (#35)   Depth: 36   00:03:02  377mN, tb=190424
1.Kg4 Rg6+ 2.Kh5[] Ra6 3.Kg5[] Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.a6
  +-  (#34)   Depth: 37   00:04:43  572mN, tb=312346
Parent - - By sensei (*) [fr] Date 2012-02-28 20:07
Thank you kgburcham :wink:

Did you try with Houdini ?
Parent - By kgburcham (***) [us] Date 2012-02-29 01:25
you are welcome
Here is Houdini

8/8/r7/P3k3/R4p2/5K2/5P2/8 w - - 0 1


Houdini 2.0c Pro x64:

1.Ra2
  +-  (14.72 ++)   Depth: 27/56   00:00:16  586mN, tb=338635
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 8.Kd3 Kc6 
  +-  (#37)   Depth: 27/56   00:00:32  1265mN, tb=547266
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 8.Kd3 Kc6 
  +-  (#37)   Depth: 31/57   00:00:43  1621mN, tb=620424
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 8.Kd3 Kc6 
  +-  (#37)   Depth: 32/57   00:00:47  1736mN, tb=647093
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 8.Kd3 Kc6 
  +-  (#37)   Depth: 33/57   00:00:52  1860mN, tb=676057
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 8.Kd3 Kc6 
  +-  (#37)   Depth: 34/57   00:00:57  2013mN, tb=716313
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 8.Kd3 Kc6 
  +-  (#37)   Depth: 35/57   00:01:03  2170mN, tb=765469
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 
  +-  (#37)   Depth: 36/57   00:01:08  2315mN, tb=821740
<snip>
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 8.Kd3 Kc6 9.Ke4 Kd7 10.f5 Kd6 11.Ra3 Kd7 12.Ke5
  +-  (#37)   Depth: 48/71   00:04:23  8002mN, tb=4460449
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke6 5.Ra4 Kd5 6.Ke3 Kc6 7.f4 Kd5 8.Kd3 Kc6 9.Ke4 Kd7 10.f5 Kd6 11.Ra3 Kd7 12.Ke5
  +-  (#37)   Depth: 49/71   00:05:25  9863mN, tb=5518824
Parent - By Peter Grayson (***) [gb] Date 2012-03-03 21:04 Edited 2012-03-03 21:06
#37 is correct. DR4.1 Kg8 is #38
Moral is - don't trust Rybka's mate announcements!

[Event "M34?"]
[Site "Newport, South Wales"]
[Date "2012.03.03"]
[Round "1"]
[White "Deep Rybka 4.1 x64 LP"]
[Black "HIARCS 13.2"]
[Result "1-0"]
[Annotator "Grayson,Peter"]
[SetUp "1"]
[FEN "8/8/r7/P3k3/R4p2/5K2/5P2/8 w - - 0 1"]
[PlyCount "79"]
[TimeControl "3/3600:30/9000:30/9000"]

{2048MB, MT.ctg, DEVO4} 1. Kg4 {[%eval 32702,29] [%emt 0:11:56] #37} (1. Ra2
Kf5 2. Ra1 Ke5 3. Ra4 Kf5 4. Rxf4+ Ke5 5. Ra4 Kd5 6. Ra2 Kc5 7. Ke4 Re6+ 8. Kf4
Ra6 9. Kg5 Kd5 10. f4 Ke6 11. f5+ Kf7 12. Ra1 Ke7 13. Re1+ Kf7 14. Re5 Ra8 15.
f6 Rg8+ 16. Kf5 Rg3 17. Re7+ Kf8 18. a6 Rf3+ 19. Ke5 Re3+ 20. Kd4 Rf3 21. a7
Ra3 22. Rh7 Kg8 23. Rd7 Kf8 24. Rd8+ Kf7 25. a8=Q Rxa8 26. Rxa8 Kxf6 27. Kd5
Kf5 28. Rf8+ Kg4 29. Ke5 Kg3 30. Ke4 Kg2 31. Ke3 Kg3 32. Rf4 Kg2 33. Rf3 Kg1
34. Rg3+ Kh1 35. Ke2 Kh2 36. Kf2 Kh1 37. Rh3#) 1... Rg6+ {[%emt 0:00:00]} 2.
Kh5 {[%eval 32702,23] [%emt 0:01:03] #36} Ra6 {[%emt 0:01:17]} 3. Kg5 {[%eval
32696,29] [%emt 0:02:54] #35} f3 {[%emt 0:00:09]} 4. Kg4 {[%eval 32698,34]
[%emt 0:13:03] #34} Kd5 {[%emt 0:00:16] (Kd6)} 5. Kxf3 {[%eval 32702,44] [%emt
0:09:58] #33} Ke5 {[%emt 0:00:10] (Kc6)} 6. Ke3 {[%eval 32704,0] [%emt 0:00:00]
#32} Kd5 {[%emt 0:00:23]} 7. f4 {[%eval 32706,0] [%emt 0:00:00]} Kd6 {[%emt 0:
00:06]} 8. Kd4 {[%eval 32708,0] [%emt 0:00:00]} Kd7 {[%emt 0:00:05]} 9. f5 {
[%eval 32710,0] [%emt 0:00:00]} Kd8 {[%emt 0:00:10]} 10. Ra2 {[%eval 32712,0]
[%emt 0:00:00]} Kd7 {[%emt 0:00:10]} 11. Kd5 {[%eval 32714,0] [%emt 0:00:00]}
Kc7 {[%emt 0:00:05]} 12. Rc2+ {[%eval 32716,0] [%emt 0:00:00]} Kd7 {[%emt 0:00:
05]} 13. Rc5 {[%eval 32718,0] [%emt 0:00:00]} Ke7 {[%emt 0:00:18]} 14. Kc4 {
[%eval 32720,0] [%emt 0:00:00]} Kd6 {[%emt 0:00:04]} 15. Rd5+ {[%eval 32722,0]
[%emt 0:00:00]} Ke7 {[%emt 0:00:06]} 16. Kb5 {[%eval 32724,0] [%emt 0:00:00]}
Ra8 {[%emt 0:00:06]} 17. a6 {[%eval 32726,0] [%emt 0:00:00]} Kf6 {[%emt 0:00:
15]} 18. Kb6 {[%eval 32728,0] [%emt 0:00:00]} Rb8+ {[%emt 0:00:05]} 19. Kc7 {
[%eval 32730,0] [%emt 0:00:00]} Rf8 {[%emt 0:00:04]} 20. Ra5 {[%eval 32732,0]
[%emt 0:00:00]} Rf7+ {[%emt 0:00:06]} 21. Kb6 {[%eval 32734,0] [%emt 0:00:00]}
Kg5 {[%emt 0:00:10]} 22. a7 {[%eval 32736,0] [%emt 0:00:00]} Rf6+ {[%emt 0:00:
05]} 23. Kc5 {[%eval 32738,0] [%emt 0:00:00]} Rf8 {[%emt 0:00:10]} 24. a8=R {
[%eval 32742,40] [%emt 0:22:17]} (24. Kd6 {#14} Ra8 25. Ke6 Re8+ 26. Kf7 Ra8
27. f6+ Kg4 28. Kg7 Kf3 29. f7 Ke2 30. Ra4 Kf2 31. Ra3 Rxa7 32. Rxa7 Ke3 33.
Rc7 Ke4 34. f8=Q Ke3 35. Rc3+ Ke4 36. Qd6 Kf5 37. Rc4 Kg5 38. Qc5#) 24... Rf7 {
[%emt 0:00:13] (Rf6)} 25. Kd6 {[%eval 32746,38] [%emt 0:19:20]} Kf4 {[%emt 0:
00:21] (Rb7)} 26. Ra4+ {[%eval 32748,39] [%emt 0:19:40]} Ke3 {[%emt 0:00:10]}
27. Ra3+ {[%eval 32748,39] [%emt 0:19:02]} Kf2 {[%emt 0:00:27] (Kf4)} 28. Ra2+
{[%eval 32748,37] [%emt 0:16:10]} Ke3 {[%emt 0:05:57] (Kg3)} 29. Re8+ {[%eval
32748,38] [%emt 0:13:35]} Kd3 {[%emt 0:01:09] (Kf3)} 30. Ra3+ {[%eval 32752,43]
[%emt 0:15:25]} Kd4 {[%emt 0:00:16] (Kc4)} 31. Rae3 {[%eval 32752,42] [%emt 0:
07:56]} Rf6+ {[%emt 0:00:00] (Kc4)} 32. R8e6 {[%eval 32748,48] [%emt 0:07:50]}
Rh6 {[%emt 0:00:14] (Rxe6+)} 33. Rxh6 {[%eval 32752,41] [%emt 0:09:24]} Kxe3 {
[%emt 0:00:11]} 34. f6 {[%eval 32754,0] [%emt 0:00:00]} Kd4 {[%emt 0:00:05]}
35. Rh3 {[%eval 32756,0] [%emt 0:00:00]} Ke4 {[%emt 0:00:05]} 36. f7 {[%eval
32758,0] [%emt 0:00:00]} Kf4 {[%emt 0:00:04]} 37. f8=Q+ {[%eval 32760,0] [%emt
0:00:00]} Kg4 {[%emt 0:00:05]} 38. Qf3+ {[%eval 32762,0] [%emt 0:00:00]} Kg5 {
[%emt 0:00:05]} 39. Ke5 {[%eval 32764,0] [%emt 0:00:00]} Kg6 {[%emt 0:00:05]}
40. Qf6# {[%eval 32766,0] [%emt 0:00:00]} 1-0
Parent - By Peter Grayson (***) [gb] Date 2012-03-03 16:09
But the problem is, it is not #34. It is #37. Try playing it out against another engine and see if DR can actually force it. Looking at the analysis, something was going wrong when it showed

1.Kg4 Rg6+ 2.Kh5 Ra6 3.Kg5 Ke6 4.f3 Ke5 5.Rxf4 Ra7 6.Rf6 Rg7+ 7.Rg6 Ra7 8.a6 Kd4
  +-  (#33)   Depth: 29   00:00:54  105mN, tb=33693

and then went back to #35. This just should not happen if the analysis is reliable.

With clean hash, Zappa Mexico II and HIARCS 13.2 both agree with Houdini that it is #37.

Stockfish and Critter could not find it in 30 minutes.

Peter G

285: Mate#34?
8/8/r7/P3k3/R4p2/5K2/5P2/8 w - - 0 1


Analysis by Zappa Mexico II:

1.Ra3 Kf5 2.Ra1 Rc6 3.a6 Rc3+ 4.Kg2 f3+
  +-  (1.58)   Depth: 9/17   00:00:01  78kN, tb=28
1.Ra3 Kf5 2.Ra1 Rc6 3.a6 Rc3+ 4.Kg2
  +-  (1.58)   Depth: 9/17   00:00:01  88kN, tb=42
1.Ra3 Kf5 2.Ra1 Ke5 3.Ra4 Ra7 4.a6 Kf5
  +-  (2.64)   Depth: 10/21   00:00:01  232kN, tb=157
1.Ra3 Kf5 2.Ra1 Ke5 3.Ra4 Ra7 4.a6 Kf5
  +-  (2.64)   Depth: 10/21   00:00:01  243kN, tb=176
1.Ra3 Rh6 2.Ra1 Rh3+ 3.Kg2 Rh7 4.a6 Ra7 5.Kf3
  +-  (2.87)   Depth: 11/27   00:00:01  654kN, tb=362
1.Ra2 Kf5 2.Ra1 Rc6 3.a6 Rc3+ 4.Kg2 Kg4 5.a7 Rc8 6.f3+
  +-  (3.72)   Depth: 11/27   00:00:02  920kN, tb=566
1.Ra2 Kf5 2.Ra1 Rc6 3.a6 Rc3+ 4.Kg2 Kg4 5.a7 Rc8 6.f3+
  +-  (3.72)   Depth: 11/27   00:00:02  923kN, tb=571
1.Ra2 Kf5 2.Ra1 Rc6 3.a6 Rc3+ 4.Ke2 Rc2+ 5.Kd3 Rc8 6.a7 Kg4 7.a8Q Rxa8 8.Rxa8
  +-  (3.50)   Depth: 12/33   00:00:02  1404kN, tb=630
1.Ra2 Kf5 2.Ra1 Rc6 3.a6 Rc3+ 4.Ke2 Rc2+ 5.Kd3 Rc8 6.a7 Kg4 7.a8Q Rxa8 8.Rxa8
  +-  (3.50)   Depth: 12/33   00:00:02  1448kN, tb=783
1.Ra2 Kf5 2.Ra1 Rc6 3.a6 Rc3+ 4.Kg2 Rc8 5.a7 Ra8 6.Kf3 Ke5 7.Ra6 Rf8 8.Ra5+
  +-  (4.22)   Depth: 13/33   00:00:03  2291kN, tb=1057
1.Ra2 Kf5 2.Ra1 Rc6 3.a6 Rc3+ 4.Kg2 Rc8 5.a7 Ra8 6.Kf3 Ke5 7.Ra6 Rf8 8.Ra5+
  +-  (4.22)   Depth: 13/33   00:00:04  2326kN, tb=1336
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Rc6 4.a6 Rc3+ 5.Ke4 Rc8 6.a7 Re8+ 7.Kf3 Rf8 8.Ra3
  +-  (4.33)   Depth: 14/47   00:00:06  5581kN, tb=2009
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Rc6 4.a6 Rc3+ 5.Ke4 Rc8 6.a7 Re8+ 7.Kf3 Rf8 8.Ra3
  +-  (4.33)   Depth: 14/47   00:00:07  5838kN, tb=2424
1.Ra2 Kf5 2.Ra1 Rd6 3.a6 Rd3+ 4.Kg2 Kg4 5.a7 f3+ 6.Kh2 Rd5 7.Ra4+ Kf5 8.a8Q Ke6 9.Qc6+ Ke5 10.Qc3+
  +-  (12.60)   Depth: 15/47   00:00:23  37050kN, tb=7362
1.Ra2 Kf5 2.Ra1 Rd6 3.a6 Rd3+ 4.Kg2 Kg4 5.a7 f3+ 6.Kh2 Rd5 7.Ra4+ Kf5 8.a8Q Ke6 9.Qc6+ Ke5 10.Qc3+
  +-  (12.60)   Depth: 15/47   00:00:24  37156kN, tb=7677
1.Ra2 Kf5 2.Ra1 Rd6 3.a6 Rd3+ 4.Kg2 Kg4 5.a7 f3+ 6.Kh2 Rd5 7.Ra4+ Kf5 8.a8Q Ke6 9.Qc6+ Ke5 10.Qc3+
  +-  (12.60)   Depth: 16/47   00:00:25  38315kN, tb=8227
1.Ra2 Kf5 2.Ra1 Rd6 3.a6 Rd3+ 4.Kg2 Kg4 5.a7 f3+ 6.Kh2 Rd5 7.Ra4+ Kf5 8.a8Q Ke6 9.Qc6+ Ke5 10.Qc3+
  +-  (12.60)   Depth: 16/47   00:00:27  38665kN, tb=8920
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Rf6 4.Re4+ Kd5 5.Rxf4
  +-  (#38)   Depth: 17/53   00:00:43  79464kN, tb=14615
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Rf6 4.Re4+ Kd5 5.Rxf4
  +-  (#38)   Depth: 17/53   00:00:50  82932kN, tb=18568
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Rf6 4.Re4+ Kd5 5.Rxf4
  +-  (#38)   Depth: 18/53   00:00:50  82936kN, tb=18679
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Rf6 4.Re4+ Kd5 5.Rxf4
  +-  (#38)   Depth: 18/53   00:00:50  83040kN, tb=19187
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 19/53   00:00:52  84677kN, tb=20763
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 19/53   00:00:55  86784kN, tb=23149
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 20/53   00:00:55  87677kN, tb=24420
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 20/53   00:01:12  112mN, tb=34025
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 21/53   00:01:14  114mN, tb=36644
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 21/61   00:01:41  157mN, tb=51463
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 22/61   00:01:44  160mN, tb=54871
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 22/61   00:02:20  211mN, tb=77618
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 23/61   00:02:24  217mN, tb=84490
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 23/61   00:02:36  230mN, tb=96280
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 24/61   00:02:48  251mN, tb=115193
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 24/61   00:03:41  330mN, tb=168873
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+ Kg5 5.Ke4 Rxa5 6.f3
  +-  (#37)   Depth: 25/61   00:03:57  358mN, tb=200956
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 25/61   00:04:54  420mN, tb=270701
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+ Kg5 5.Ke4
  +-  (#37)   Depth: 26/61   00:05:19  471mN, tb=313835
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 26/61   00:05:47  543mN, tb=383585
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 27/61   00:07:03  729mN, tb=538261
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+ Kg5 5.Rg4+
  +-  (#37)   Depth: 27/61   00:08:03  840mN, tb=665035
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+ Kg5 5.Rg4+
  +-  (#37)   Depth: 28/65   00:10:21  1192mN, tb=937148
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 28/65   00:11:25  1363mN, tb=1073344
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+ Kg5 5.Ke4 Rxa5 6.f3
  +-  (#37)   Depth: 29/65   00:12:00  1448mN, tb=1139885
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 29/65   00:12:34  1540mN, tb=1295253
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 30/65   00:14:10  1843mN, tb=1625445
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 30/75   00:15:15  2009mN, tb=1828646
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 31/75   00:19:03  2633mN, tb=2831270
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 31/81   00:22:56  3447mN, tb=3565907
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 32/81   00:34:25  4922mN, tb=5316312
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4 Kf5 4.Rxf4+
  +-  (#37)   Depth: 32/83   00:46:00  5958mN, tb=6521372

(Grayson, Newport, South Wales 03.03.2012)

285: Mate#34?
8/8/r7/P3k3/R4p2/5K2/5P2/8 w - - 0 1


Analysis by HIARCS 13.2 MP:

1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4
  +-  (6.17)   Depth: 17/29   00:00:00  1014kN, tb=1328
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4
  +-  (6.41)   Depth: 17/29   00:00:00  1132kN, tb=1454
1.Ra2
  +-  (6.66 !)   Depth: 18/29   00:00:01  1767kN, tb=2130
1.Ra2 Kf5 2.Ra1 Rc6 3.a6
  +-  (7.64)   Depth: 18/30   00:00:01  3774kN, tb=3725
1.Ra2 Kf5 2.Ra1 Ke5 3.Ra4
  +-  (7.88)   Depth: 19/32   00:00:04  8139kN, tb=8927
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4
  +-  (8.12)   Depth: 20/34   00:00:07  15037kN, tb=16695
1.Ra2
  +-  (8.37 !)   Depth: 21/35   00:00:13  27786kN, tb=28668
1.Ra2 Kf5 2.Ra1 Rc6 3.a6
  +-  (9.36)   Depth: 21/39   00:00:18  42979kN, tb=40413
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4
  +-  (9.60)   Depth: 22/39   00:00:23  51334kN, tb=55774
1.Ra2
  +-  (9.85 !)   Depth: 23/39   00:00:29  60180kN, tb=73392
1.Ra2
  +-  (10.85 !)   Depth: 23/39   00:00:31  68596kN, tb=78060
1.Ra2
  +-  (12.85 !)   Depth: 23/39   00:00:35  85113kN, tb=84077
1.Ra2
  +-  (#112)   Depth: 23/43   00:00:47  100mN, tb=140031
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke5 5.Kg4
  +-  (#37)   Depth: 23/45   00:01:29  234mN, tb=297548
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke5 5.Kg4
  +-  (#37)   Depth: 24/45   00:05:28  1389mN, tb=669429
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke5 5.Kg4
  +-  (#37)   Depth: 25/45   00:09:19  2653mN, tb=837293
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke5 5.Kg4
  +-  (#37)   Depth: 26/49   00:12:24  3702mN, tb=897318
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke5 5.Kg4
  +-  (#37)   Depth: 27/49   00:15:07  4613mN, tb=959593
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke5 5.Kg4
  +-  (#37)   Depth: 28/51   00:23:36  7444mN, tb=1243134
1.Ra2 Kf5 2.Ra1 Kg5 3.Ra4 Kf5 4.Rxf4+ Ke5 5.Kg4
  +-  (#37)   Depth: 29/55   00:36:42  11531mN, tb=1726559

(Grayson, Newport, South Wales 03.03.2012)
Up Topic The Rybka Lounge / Test Positions / What is the fastest mate in this position ?

Powered by mwForum 2.27.4 © 1999-2012 Markus Wichitill