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![[in]](/mwf/v12/flags/in.png "India")
Just yesterday I finished One game in FICGS which I consider to be the Toughest Game I Have played so far.
[Event "FICGS__CHESS__RAPID_A__000118"]
[Site "FICGS"]
[Date "2011.11.24"]
[Round "1"]
[White "Prakash,Om"]
[Black "Skwarczylo,Marek"]
[Result "1/2-1/2"]
[WhiteElo "2053"]
[BlackElo "1990"]
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 O-O 12.Nc2 Rb8 13.h4 Ne7 14.Nxf6+ gxf6 15.Qh5 f5 16.Qg5+ Kh8 17.Qf6+ Kg8 18.O-O-O Be6 19.Bd3 f4 20.g3 fxg3 21.h5 Nc6 22.Qh6 Kh8 23.Be2 g2 24.Rhg1 Rg8 25.Rxd6 Qh4 26.Rxc6 Qh1 27.Qf6+ Rg7 28.h6 Qxg1+ 29.Kd2 Qc1+ 30.Kxc1 g1Q+ 31.Kd2 Qg5+ 32.Qxg5 Rxg5 33.Rxa6 Rg6 34.Nb4 Bc4 35.Bxc4 bxc4 36.Ra7 Rf8 37.Rc7 Rxh6 38.Ke2 Rh1 39.Rxc4 h5 40.Nc6 h4 41.Nxe5 h3 42.Ng4 h2 43.Kf3 Kg7 44.a4 Rh8 45.Nxh2 R8xh2 46.b4 Rf1 47.Ke3 R1xf2 48.Rc8 Ra2 49.a5 Kf6 50.Kd4 Ke7 51.Rb8 Kd6 52.Rb7 Rhf2 53.e5+ Kc6 54.Rb6+ Kc7 55.Ra6 Rad2+ 56.Kc4 Kb8 57.Rb6+ Ka7 58.b5 Rd7 59.Kb3 Rb7 60.Ra6+ Kb8 61.c4 Rf4 62.e6 fxe6 63.Rxe6 Rc7 64.Rb6+ Ka8 65.Ra6+ Ra7 66.Rxa7+ 1/2-1/2
In the whole game I used Spark and my tweaked stockfish. Like 20.g3 was spark's Idea. I tried to attack but his defence prevailed. At move 38 I started using Houdini and At depth 30 running after nearly 1 hour it suggested me Ke2 which was acyually blunder. Then It was a pleasure to throw the game away by another houdini suggested blunder 40. Nc6...and at move 45 I had to lose my knight. Now from move 51 I had to find a draw.
Now I switched to Idea as to try it out. But what engines to use ?. I tried Rybka houdini and Stockfish GTB and used Komodo as main engine in IDeA. Now I found that Komodo was the only program that found the correct move orders and luckily I was biased to depend on komodos analysis. Houdini was giving slight advantage to black but if continued further there was fail highs and lows which gave me lots of headache. On the other hand rybka thought the position is lost. It took me 20 days to find the correct move Rb8 where most engines suggest Rc7+ , Komodo suggested Rb8. By following Komodod evals I managed to draw.
Still I think I would have won it but where did I go Wrong ??
[Event "FICGS__CHESS__RAPID_A__000118"]
[Site "FICGS"]
[Date "2011.11.24"]
[Round "1"]
[White "Prakash,Om"]
[Black "Skwarczylo,Marek"]
[Result "1/2-1/2"]
[WhiteElo "2053"]
[BlackElo "1990"]
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 O-O 12.Nc2 Rb8 13.h4 Ne7 14.Nxf6+ gxf6 15.Qh5 f5 16.Qg5+ Kh8 17.Qf6+ Kg8 18.O-O-O Be6 19.Bd3 f4 20.g3 fxg3 21.h5 Nc6 22.Qh6 Kh8 23.Be2 g2 24.Rhg1 Rg8 25.Rxd6 Qh4 26.Rxc6 Qh1 27.Qf6+ Rg7 28.h6 Qxg1+ 29.Kd2 Qc1+ 30.Kxc1 g1Q+ 31.Kd2 Qg5+ 32.Qxg5 Rxg5 33.Rxa6 Rg6 34.Nb4 Bc4 35.Bxc4 bxc4 36.Ra7 Rf8 37.Rc7 Rxh6 38.Ke2 Rh1 39.Rxc4 h5 40.Nc6 h4 41.Nxe5 h3 42.Ng4 h2 43.Kf3 Kg7 44.a4 Rh8 45.Nxh2 R8xh2 46.b4 Rf1 47.Ke3 R1xf2 48.Rc8 Ra2 49.a5 Kf6 50.Kd4 Ke7 51.Rb8 Kd6 52.Rb7 Rhf2 53.e5+ Kc6 54.Rb6+ Kc7 55.Ra6 Rad2+ 56.Kc4 Kb8 57.Rb6+ Ka7 58.b5 Rd7 59.Kb3 Rb7 60.Ra6+ Kb8 61.c4 Rf4 62.e6 fxe6 63.Rxe6 Rc7 64.Rb6+ Ka8 65.Ra6+ Ra7 66.Rxa7+ 1/2-1/2
In the whole game I used Spark and my tweaked stockfish. Like 20.g3 was spark's Idea. I tried to attack but his defence prevailed. At move 38 I started using Houdini and At depth 30 running after nearly 1 hour it suggested me Ke2 which was acyually blunder. Then It was a pleasure to throw the game away by another houdini suggested blunder 40. Nc6...and at move 45 I had to lose my knight. Now from move 51 I had to find a draw.
2R5/4kp2/8/P7/1P1KP3/2P5/r6r/8 w - - 0 51
Now I switched to Idea as to try it out. But what engines to use ?. I tried Rybka houdini and Stockfish GTB and used Komodo as main engine in IDeA. Now I found that Komodo was the only program that found the correct move orders and luckily I was biased to depend on komodos analysis. Houdini was giving slight advantage to black but if continued further there was fail highs and lows which gave me lots of headache. On the other hand rybka thought the position is lost. It took me 20 days to find the correct move Rb8 where most engines suggest Rc7+ , Komodo suggested Rb8. By following Komodod evals I managed to draw.
Still I think I would have won it but where did I go Wrong ??
![[fr]](/mwf/v12/flags/fr.png "France")
Houdini does find Rb8
2R5/4kp2/8/P7/1P1KP3/2P5/r6r/8 w - - 0 1
Analysis by Houdini 2.0c w32 Nalimov(5-man):
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd8 4.Kb6 Ra3 5.Rc7 Ke5 6.Kb7 Rd6 7.Re7+ Kf4 8.e5 Rh6 9.Rxf7+ Kxe5 10.Rc7 Rd6 11.Rh7 Rg6 12.Rc7 Re6 13.Rc4 Rf6 14.Rg4 Rxc3 15.b5 Kd5 16.a6 Ra3 17.Rg7 Kc5 18.Rg5+ Kc4 19.Re5 Rf7+ 20.Kc6 Kb4 21.Kb6
=/+ (-0.62) Depth: 27/60 00:12:13 2259mN, tb=2858
1.Rc7+ Ke6
=/+ (-0.69 --) Depth: 28/63 00:16:03 2968mN, tb=3684
1.Rc7+ Ke6
-/+ (-0.83 --) Depth: 28/64 00:26:38 4973mN, tb=6326
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4 Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rb7 Rca2 8.Ra7 Ra4 9.Rf7 Ke5 10.Ra7 Ra1 11.Ra8 Kd4 12.e5 Kd5 13.e6 Kxe6 14.Rh8 R4a3 15.Rh6+ Ke5 16.Rh5+ Kd4 17.Rh4+ Kd5 18.Rh5+ Ke6 19.Rh7 R1a2 20.Rh6+ Ke7 21.Rc6 Kd7 22.Rh6 Ra1 23.Rh7+ Ke6 24.Rh6+ Ke5
=/+ (-0.69) Depth: 28/64 00:27:54 5202mN, tb=7147
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4 Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rb7 Rca2 8.Ra7 Ra4 9.Rf7 Ke5 10.Ra7 Ra1 11.Ra8 Kd4 12.e5 Kd5 13.e6 Kxe6 14.Rh8 R4a3 15.Rh6+ Ke5 16.Rh5+ Kd4 17.Rh4+ Kd5 18.Rh5+ Ke6 19.Rh7 R1a2 20.Rh6+ Ke7 21.Rc6 Kd7 22.Rh6 Ra1 23.Rh7+ Ke6 24.Rh6+ Ke5
=/+ (-0.69) Depth: 29/64 00:30:53 5791mN, tb=8673
After 30 mins . Nice. Komodo finds after 5 mins nearly.
![[gb]](/mwf/v12/flags/gb.png "United Kingdom")
Rybka also finds Rb8
Analysis by Deep Rybka 4.1 SSE42 x64:
1.Rc7+ Ke6 2.Rb7 Rh4 3.Rb6+ Kd7 4.Rb7+ Kc6 5.Rxf7 Rd2+ 6.Kc4 Rxe4+ 7.Kb3[] Rd1 8.Rf6+ Kb7 9.Rf7+ Kb8 10.Rf8+ Kc7 11.Rf7+ Kd6 12.Rf6+ Kd7 13.Rf7+ Re7 14.Rxe7+ Kxe7 15.Kb2 Kd6
-/+ (-0.98) Depth: 23 00:08:50 37168kN, tb=2952
1.Rc7+ Ke6 2.Rb7 Rh4 3.Rb6+ Kd7 4.Rb7+ Kc6 5.Rxf7 Rd2+ 6.Kc4 Rxe4+[] 7.Kb3[] Rd1 8.Rf6+ Kd7 9.Rf7+ Ke6 10.Rf8 Ke7 11.Rg8 Ra1 12.Rg6 Kd7 13.Kb2 Ree1 14.a6 Reb1+ 15.Kc2 Kc7
-/+ (-0.98) Depth: 24 00:11:37 52494kN, tb=4584
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4[] Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh6+
-/+ (-1.21) Depth: 25 00:32:56 369mN, tb=27309
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4[] Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh6+ Ke5 10.Rc6 Kxe4 11.Rc4+ Ke3 12.Rc6 Kd4 13.Rc4+ Kd5 14.Rc5+ Kd4 15.Rc4+ Kd5 16.Rc5+
-/+ (-1.21) Depth: 26 00:34:34 400mN, tb=30972
(, Microsoft 29.03.2012)
2R5/4kp2/8/P7/1P1KP3/2P5/r6r/8 w - - 0 1
Analysis by Deep Rybka 4.1 SSE42 x64:
1.Rc7+ Ke6 2.Rb7 Rh4 3.Rb6+ Kd7 4.Rb7+ Kc6 5.Rxf7 Rd2+ 6.Kc4 Rxe4+ 7.Kb3[] Rd1 8.Rf6+ Kb7 9.Rf7+ Kb8 10.Rf8+ Kc7 11.Rf7+ Kd6 12.Rf6+ Kd7 13.Rf7+ Re7 14.Rxe7+ Kxe7 15.Kb2 Kd6
-/+ (-0.98) Depth: 23 00:08:50 37168kN, tb=2952
1.Rc7+ Ke6 2.Rb7 Rh4 3.Rb6+ Kd7 4.Rb7+ Kc6 5.Rxf7 Rd2+ 6.Kc4 Rxe4+[] 7.Kb3[] Rd1 8.Rf6+ Kd7 9.Rf7+ Ke6 10.Rf8 Ke7 11.Rg8 Ra1 12.Rg6 Kd7 13.Kb2 Ree1 14.a6 Reb1+ 15.Kc2 Kc7
-/+ (-0.98) Depth: 24 00:11:37 52494kN, tb=4584
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4[] Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh6+
-/+ (-1.21) Depth: 25 00:32:56 369mN, tb=27309
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4[] Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh6+ Ke5 10.Rc6 Kxe4 11.Rc4+ Ke3 12.Rc6 Kd4 13.Rc4+ Kd5 14.Rc5+ Kd4 15.Rc4+ Kd5 16.Rc5+
-/+ (-1.21) Depth: 26 00:34:34 400mN, tb=30972
(, Microsoft 29.03.2012)
same 30 mins.....
bizarre how the nps get higher from depth 23 to 26...
what cpu was that?
what cpu was that?
no kN/s in my post.5680x2 at 4.2 mhz
> no kN/s in my post
-/+ (-0.98) Depth: 23 00:08:50 37168kN, tb=2952 ==> 37168/530=70 kN/s (isn't that a bit low, even for Rybka?...)
-/+ (-0.98) Depth: 24 00:11:37 52494kN, tb=4584
-/+ (-1.21) Depth: 25 00:32:56 369mN, tb=27309
-/+ (-1.21) Depth: 26 00:34:34 400mN, tb=30972 ==> 400000/2074=193 kN/s
ah, i see what you mean.When Rybka went into deep thought its kN/s dropped dramatically this is well known to Lukas and i but most guys just think Rybka has locked up its a trait of Rybka.After deep thought kN/s climb'd somewhat but still very slow,normally i would expect 10x this.
Rybka still finds position very complex.
I have 47 GB of tbs loaded.
Rybka still finds position very complex.
I have 47 GB of tbs loaded.
![[us]](/mwf/v12/flags/us.png "United States")
If you run it with the visualizer you'll see what is really going on, talking about R4.1.
> After 30 mins
Well, that's 32-bit on poor dualcore @3GHz.
I guess that 64-bit on Xeon 2x6 cores @4GHz will get it easily in less than 5 minutes...
Rybka was running on a 12 core machine @4.2GHz so i understand how omprakash thought Rybka could not find it.
I dont have that machine though.....
Analysis by Houdini 2.0 Pro x64:
1.Rc7+ Ke6 2.Rb7 Rad2+ 3.Kc5 Rc2 4.Kd4 Rhd2+ 5.Kc4 Re2 6.a6 Ra2 7.Kd3 Rad2+ 8.Kc4 Rxe4+ 9.Kb3 Rd8 10.b5 Kd6 11.Rxf7 Kc5 12.Rb7 Rh8 13.a7 Ra8 14.Kc2 Re6 15.c4 Re2+ 16.Kd3 Re6 17.Kc3 Ree8 18.Kb3 Re1 19.Kc2 Re5 20.Kc3 Ree8 21.Kb3
=/+ (-0.65) Depth: 26/68 00:00:28 925mN
1.Rc7+ Ke6
-/+ (-0.72 --) Depth: 27/68 00:00:38 1284mN
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4 Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh7 Ke5 10.Rh6 Ra1 11.Rg6 R3a2 12.Rh6 Ra4 13.Rg6 R4a3 14.Rh6 Kd4 15.Rg6 Rb3 16.Rg7 Rab1 17.Rd7+ Ke5 18.Kc5 Rxb4 19.Re7+ Kf6 20.a7 Ra4 21.Rh7 Rba1 22.e5+ Kxe5 23.Re7+ Kf5
=/+ (-0.69) Depth: 27/68 00:00:48 1625mN
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4 Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh7 Ke5 10.Rh6 Ra1 11.Rg6 R3a2 12.Rh6 Ra4 13.Rg6 R4a3 14.Rh6 Kd4 15.Rg6 Rb3 16.Rg7 Rab1 17.Rd7+ Ke5 18.Kc5 Rxb4 19.Re7+ Kf6 20.a7 Ra4 21.Rh7 Rba1 22.e5+ Kxe5 23.Re7+ Kf5
=/+ (-0.69) Depth: 28/68 00:00:56 1930mN
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4 Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh6+ Ke5 10.Rg6 Ra1 11.Rh6 R3a2 12.Rg6 Rb2 13.Rc6 Ra3 14.Rb6 Rba2 15.Rh6 Ra1 16.Rg6 Rb1 17.Rc6 Kxe4 18.Rh6 Kd5 19.Rh5+ Ke6 20.Rh6+ Ke5 21.Rh5+ Kd6 22.Rh6+ Kd5 23.Rh5+
=/+ (-0.69) Depth: 29/68 00:01:16 2631mN
(, Microsoft 29.03.2012)
1.Rc7+ Ke6 2.Rb7 Rad2+ 3.Kc5 Rc2 4.Kd4 Rhd2+ 5.Kc4 Re2 6.a6 Ra2 7.Kd3 Rad2+ 8.Kc4 Rxe4+ 9.Kb3 Rd8 10.b5 Kd6 11.Rxf7 Kc5 12.Rb7 Rh8 13.a7 Ra8 14.Kc2 Re6 15.c4 Re2+ 16.Kd3 Re6 17.Kc3 Ree8 18.Kb3 Re1 19.Kc2 Re5 20.Kc3 Ree8 21.Kb3
=/+ (-0.65) Depth: 26/68 00:00:28 925mN
1.Rc7+ Ke6
-/+ (-0.72 --) Depth: 27/68 00:00:38 1284mN
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4 Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh7 Ke5 10.Rh6 Ra1 11.Rg6 R3a2 12.Rh6 Ra4 13.Rg6 R4a3 14.Rh6 Kd4 15.Rg6 Rb3 16.Rg7 Rab1 17.Rd7+ Ke5 18.Kc5 Rxb4 19.Re7+ Kf6 20.a7 Ra4 21.Rh7 Rba1 22.e5+ Kxe5 23.Re7+ Kf5
=/+ (-0.69) Depth: 27/68 00:00:48 1625mN
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4 Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh7 Ke5 10.Rh6 Ra1 11.Rg6 R3a2 12.Rh6 Ra4 13.Rg6 R4a3 14.Rh6 Kd4 15.Rg6 Rb3 16.Rg7 Rab1 17.Rd7+ Ke5 18.Kc5 Rxb4 19.Re7+ Kf6 20.a7 Ra4 21.Rh7 Rba1 22.e5+ Kxe5 23.Re7+ Kf5
=/+ (-0.69) Depth: 28/68 00:00:56 1930mN
1.Rb8 Kd6 2.Rb7 Rh3 3.Rxf7 Rd2+ 4.Kc4 Rc2 5.Kb5 Rhxc3 6.a6 Ra3 7.Rh7 Rca2 8.Rh5 Ke6 9.Rh6+ Ke5 10.Rg6 Ra1 11.Rh6 R3a2 12.Rg6 Rb2 13.Rc6 Ra3 14.Rb6 Rba2 15.Rh6 Ra1 16.Rg6 Rb1 17.Rc6 Kxe4 18.Rh6 Kd5 19.Rh5+ Ke6 20.Rh6+ Ke5 21.Rh5+ Kd6 22.Rh6+ Kd5 23.Rh5+
=/+ (-0.69) Depth: 29/68 00:01:16 2631mN
(, Microsoft 29.03.2012)
if i ran this again it could maybe take 3 mins due to random move selection when eval of moves is equal.
hmm. In that case nice.
Komodo does not find Rb8,sure it latches onto it early but soon switches to other moves at least thru d31.Remember Komodo is only 1 core atm.
Analysis by Komodo64 SSE Version 4:
1.Rb8 Kd6 2.Rb7 Rhd2+ 3.Kc4 Ke6 4.Kc5 Rf2 5.Kd4 Rad2+ 6.Kc5 Rc2 7.Kd4 Rfd2+ 8.Kc4 Rd8 9.Kb3 Rc1 10.Rc7 Rb1+ 11.Kc4 Re1 12.Rc6+ Rd6 13.Kc5 Rxc6+ 14.Kxc6 Rxe4 15.a6 Rc4+ 16.Kb7 Rxc3 17.a7 Ra3 18.a8Q
-/+ (-0.78) Depth: 23 00:01:29 147mN
1.Rb8 Kd6 2.Rb7 Rhd2+ 3.Kc4 Ke6 4.Kc5 Rf2 5.Kd4 Rad2+ 6.Kc5 Rc2 7.Kd4 Rfd2+ 8.Kc4 Rd8 9.Kb3 Rc1 10.Rc7 Rb1+ 11.Kc4 Re1 12.Rc6+ Rd6 13.Kc5 Rxc6+ 14.Kxc6 Rxe4 15.a6 Rc4+ 16.Kb7 Rxc3 17.a7 Ra3 18.a8Q
-/+ (-0.78) Depth: 23 00:02:31 249mN
1.Rb8 Kd6 2.Rf8 Rhd2+ 3.Kc4 Ke7 4.Rc8 Rd8 5.Rc5 Kd7 6.Kb3 Ra1 7.Kb2 Re1 8.b5 Rxe4 9.a6 Rc8 10.Rd5+ Ke6 11.Rh5 Ra4 12.Kb3 Ra1 13.Kb2 Ra5 14.Kb3 f5 15.c4 Ra1
-/+ (-0.92) Depth: 24 00:03:44 370mN
1.Kc5 Rh4 2.Kd5 Kd7 3.Rf8 Rd2+ 4.Kc5 Ke7 5.Rc8 Rxe4 6.a6 Re5+ 7.Kc4 Ra2 8.b5 Ra4+ 9.Kb3 Ra1 10.c4 f5 11.Kc3 f4 12.Kd4 Rf5 13.b6 f3 14.b7 Rd1+ 15.Kc3 f2 16.b8Q f1Q 17.Qb7+ Kf6 18.Qb6+ Kg7 19.Qc7+ Rf7 20.Qg3+ Kf6 21.Rc6+ Ke7
-/+ (-0.72) Depth: 24 00:04:50 481mN
1.Kc5 Rh4 2.Kd5 Kd7 3.Rf8 Rd2+ 4.Kc5 Ke7 5.Rc8 Rxe4 6.a6 Re5+ 7.Kc4 Ra2 8.b5 Ra4+ 9.Kb3 Ra1 10.c4 f5 11.Kc3 f4 12.Kd4 Rf5 13.b6 f3 14.b7 Rd1+ 15.Kc3 f2 16.b8Q f1Q 17.Qb7+ Kf6 18.Qb6+ Kg7 19.Qc7+ Rf7 20.Qg3+ Kf6 21.Rc6+ Ke7
-/+ (-0.72) Depth: 24 00:05:18 528mN
1.Kc5 Rh4 2.Kd5 Kd7 3.Rf8 Rd2+ 4.Kc5 Ke7 5.Rc8 Rxe4 6.a6 Re5+ 7.Kc4 Ra2 8.b5 Ra4+ 9.Kb3 Ra1 10.Kc4 Rg5 11.Kb4 f5 12.Rc7+ Kd6 13.Rc6+ Kd5 14.c4+ Ke4 15.Re6+ Kd4 16.Rd6+ Ke5 17.Kc5 Rg8 18.Rd5+ Ke4 19.Rd4+ Ke3 20.Rd5 f4 21.Re5+ Kd3 22.Rd5+ Ke4
-/+ (-0.82) Depth: 25 00:05:35 557mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Kb5 Rb8+ 12.Ka6 Ra2 13.Ka7 Rd8 14.Kb6 Rd6+ 15.Kb5 f6 16.Rc7
-/+ (-0.77) Depth: 25 00:06:52 687mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Kb5 Rb8+ 12.Ka6 Ra2 13.Ka7 Rd8 14.Kb6 Rd6+ 15.Kb5 f6 16.Rc7
-/+ (-0.77) Depth: 25 00:07:48 780mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Rc7 Kf6 12.c4 Rb8+ 13.Kc5 Ra4 14.Rc6+ Ke5 15.Rb6 Rc8+ 16.Kb5 Ra3 17.Rb7 Kxe4 18.Re7+ Kd4
-/+ (-0.77) Depth: 26 00:08:30 852mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Rc7 Kf6 12.c4 Rb8+ 13.Kc5 Ra4 14.Rc6+ Ke5 15.Rb6 Rc8+ 16.Kb5 Ra3 17.Rb7 Kxe4 18.Re7+ Kd4
-/+ (-0.77) Depth: 26 00:09:07 915mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Rc7 Rd6+ 12.Kb5 Rd7 13.Rc5 Ra2 14.Kb6 Rd6+ 15.Kc7 Ra3 16.c4 Rdd3 17.Kb7 Rdb3
-/+ (-0.77) Depth: 27 00:10:35 1069mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Rc7 Rd6+ 12.Kb5 Rd7 13.Rc5 Ra2 14.Kb6 Rd6+ 15.Kc7 Ra3 16.c4 Rdd3 17.Kb7 Rdb3
-/+ (-0.77) Depth: 27 00:11:19 1144mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.Rb8 Rda2 14.Kc4 Rb2 15.Re8+ Kd6 16.Rd8+ Kc7 17.Rd5 Ra3 18.Rf5 Kb6 19.Rf6+ Ka5 20.Rf5 f6
-/+ (-0.86) Depth: 28 00:18:13 1848mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.Rb8 Rda2 14.Kc4 Rb2 15.Re8+ Kd6 16.Rd8+ Kc7 17.Rd5 Ra3 18.Rf5 Kb6 19.Rf6+ Ka5 20.Rf5 f6
-/+ (-0.86) Depth: 28 00:31:27 3210mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.c4 Rda2 14.Kc3 Ra4 15.Rc7 f5 16.Kd4 Rd1+ 17.Kc5 Rc1 18.Kd4 f4 19.Rc6+ Kd7 20.Kd5 Rc2 21.Rf6 Rcxc4 22.Rf7+ Ke8
-/+ (-0.86) Depth: 29 00:37:06 3790mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.c4 Rda2 14.Kc3 Ra4 15.Rc7 f5 16.Kd4 Rd1+ 17.Kc5 Rc1 18.Kd4 f4 19.Rc6+ Kd7 20.Kd5 Rc2 21.Rf6 Rcxc4 22.Rf7+ Ke8
-/+ (-0.86) Depth: 29 00:47:13 4804mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.Rb8 Rb1+ 14.Kc4 Ra2 15.Re8+ Kd6 16.Rd8+ Ke7 17.Rb8 Ra3 18.Kd5 Rd1+ 19.Kc5 Rxc3+ 20.Kb4 Rc7 21.b6 Rb1+ 22.Ka3 Rc5 23.Ka2 Rbc1 24.a7 Ra5+
-/+ (-0.86) Depth: 30 00:56:53 5794mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.Rb8 Rb1+ 14.Kc4 Ra2 15.Re8+ Kd6 16.Rd8+ Ke7 17.Rb8 Ra3 18.Kd5 Rd1+ 19.Kc5 Rxc3+ 20.Kb4 Rc7 21.b6 Rb1+ 22.Ka3 Rc5 23.Ka2 Rbc1 24.a7 Ra5+
-/+ (-0.86) Depth: 30 01:04:40 6578mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.Rb6+ Ke5 9.Rb7 Re3 10.Rxf7 Rexc3+ 11.Kb5 Rb2 12.Rb7 Rcb3 13.Kc5 Ra2 14.Kb5 Kxe4 15.Re7+ Kd5 16.Rd7+ Ke5 17.Re7+ Kd6 18.Rh7 Rc3 19.Rh6+ Kd5 20.a6 Rc8 21.Rh5+ Ke6 22.Rh7 Kd6 23.Rh6+ Ke5 24.Rh5+ Kf6
-/+ (-0.87) Depth: 31 01:27:14 8916mN
(, Microsoft 29.03.2012)
2R5/4kp2/8/P7/1P1KP3/2P5/r6r/8 w - - 0 1
Analysis by Komodo64 SSE Version 4:
1.Rb8 Kd6 2.Rb7 Rhd2+ 3.Kc4 Ke6 4.Kc5 Rf2 5.Kd4 Rad2+ 6.Kc5 Rc2 7.Kd4 Rfd2+ 8.Kc4 Rd8 9.Kb3 Rc1 10.Rc7 Rb1+ 11.Kc4 Re1 12.Rc6+ Rd6 13.Kc5 Rxc6+ 14.Kxc6 Rxe4 15.a6 Rc4+ 16.Kb7 Rxc3 17.a7 Ra3 18.a8Q
-/+ (-0.78) Depth: 23 00:01:29 147mN
1.Rb8 Kd6 2.Rb7 Rhd2+ 3.Kc4 Ke6 4.Kc5 Rf2 5.Kd4 Rad2+ 6.Kc5 Rc2 7.Kd4 Rfd2+ 8.Kc4 Rd8 9.Kb3 Rc1 10.Rc7 Rb1+ 11.Kc4 Re1 12.Rc6+ Rd6 13.Kc5 Rxc6+ 14.Kxc6 Rxe4 15.a6 Rc4+ 16.Kb7 Rxc3 17.a7 Ra3 18.a8Q
-/+ (-0.78) Depth: 23 00:02:31 249mN
1.Rb8 Kd6 2.Rf8 Rhd2+ 3.Kc4 Ke7 4.Rc8 Rd8 5.Rc5 Kd7 6.Kb3 Ra1 7.Kb2 Re1 8.b5 Rxe4 9.a6 Rc8 10.Rd5+ Ke6 11.Rh5 Ra4 12.Kb3 Ra1 13.Kb2 Ra5 14.Kb3 f5 15.c4 Ra1
-/+ (-0.92) Depth: 24 00:03:44 370mN
1.Kc5 Rh4 2.Kd5 Kd7 3.Rf8 Rd2+ 4.Kc5 Ke7 5.Rc8 Rxe4 6.a6 Re5+ 7.Kc4 Ra2 8.b5 Ra4+ 9.Kb3 Ra1 10.c4 f5 11.Kc3 f4 12.Kd4 Rf5 13.b6 f3 14.b7 Rd1+ 15.Kc3 f2 16.b8Q f1Q 17.Qb7+ Kf6 18.Qb6+ Kg7 19.Qc7+ Rf7 20.Qg3+ Kf6 21.Rc6+ Ke7
-/+ (-0.72) Depth: 24 00:04:50 481mN
1.Kc5 Rh4 2.Kd5 Kd7 3.Rf8 Rd2+ 4.Kc5 Ke7 5.Rc8 Rxe4 6.a6 Re5+ 7.Kc4 Ra2 8.b5 Ra4+ 9.Kb3 Ra1 10.c4 f5 11.Kc3 f4 12.Kd4 Rf5 13.b6 f3 14.b7 Rd1+ 15.Kc3 f2 16.b8Q f1Q 17.Qb7+ Kf6 18.Qb6+ Kg7 19.Qc7+ Rf7 20.Qg3+ Kf6 21.Rc6+ Ke7
-/+ (-0.72) Depth: 24 00:05:18 528mN
1.Kc5 Rh4 2.Kd5 Kd7 3.Rf8 Rd2+ 4.Kc5 Ke7 5.Rc8 Rxe4 6.a6 Re5+ 7.Kc4 Ra2 8.b5 Ra4+ 9.Kb3 Ra1 10.Kc4 Rg5 11.Kb4 f5 12.Rc7+ Kd6 13.Rc6+ Kd5 14.c4+ Ke4 15.Re6+ Kd4 16.Rd6+ Ke5 17.Kc5 Rg8 18.Rd5+ Ke4 19.Rd4+ Ke3 20.Rd5 f4 21.Re5+ Kd3 22.Rd5+ Ke4
-/+ (-0.82) Depth: 25 00:05:35 557mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Kb5 Rb8+ 12.Ka6 Ra2 13.Ka7 Rd8 14.Kb6 Rd6+ 15.Kb5 f6 16.Rc7
-/+ (-0.77) Depth: 25 00:06:52 687mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Kb5 Rb8+ 12.Ka6 Ra2 13.Ka7 Rd8 14.Kb6 Rd6+ 15.Kb5 f6 16.Rc7
-/+ (-0.77) Depth: 25 00:07:48 780mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Rc7 Kf6 12.c4 Rb8+ 13.Kc5 Ra4 14.Rc6+ Ke5 15.Rb6 Rc8+ 16.Kb5 Ra3 17.Rb7 Kxe4 18.Re7+ Kd4
-/+ (-0.77) Depth: 26 00:08:30 852mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Rc7 Kf6 12.c4 Rb8+ 13.Kc5 Ra4 14.Rc6+ Ke5 15.Rb6 Rc8+ 16.Kb5 Ra3 17.Rb7 Kxe4 18.Re7+ Kd4
-/+ (-0.77) Depth: 26 00:09:07 915mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Rc7 Rd6+ 12.Kb5 Rd7 13.Rc5 Ra2 14.Kb6 Rd6+ 15.Kc7 Ra3 16.c4 Rdd3 17.Kb7 Rdb3
-/+ (-0.77) Depth: 27 00:10:35 1069mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rd7 4.Kb6 Rd3 5.Rc7 Rd6+ 6.Kc5 Rd8 7.Kb6 Ra3 8.Rc5 Rd6+ 9.Kb5 Rd7 10.Kb6 Rd8 11.Rc7 Rd6+ 12.Kb5 Rd7 13.Rc5 Ra2 14.Kb6 Rd6+ 15.Kc7 Ra3 16.c4 Rdd3 17.Kb7 Rdb3
-/+ (-0.77) Depth: 27 00:11:19 1144mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.Rb8 Rda2 14.Kc4 Rb2 15.Re8+ Kd6 16.Rd8+ Kc7 17.Rd5 Ra3 18.Rf5 Kb6 19.Rf6+ Ka5 20.Rf5 f6
-/+ (-0.86) Depth: 28 00:18:13 1848mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.Rb8 Rda2 14.Kc4 Rb2 15.Re8+ Kd6 16.Rd8+ Kc7 17.Rd5 Ra3 18.Rf5 Kb6 19.Rf6+ Ka5 20.Rf5 f6
-/+ (-0.86) Depth: 28 00:31:27 3210mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.c4 Rda2 14.Kc3 Ra4 15.Rc7 f5 16.Kd4 Rd1+ 17.Kc5 Rc1 18.Kd4 f4 19.Rc6+ Kd7 20.Kd5 Rc2 21.Rf6 Rcxc4 22.Rf7+ Ke8
-/+ (-0.86) Depth: 29 00:37:06 3790mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.c4 Rda2 14.Kc3 Ra4 15.Rc7 f5 16.Kd4 Rd1+ 17.Kc5 Rc1 18.Kd4 f4 19.Rc6+ Kd7 20.Kd5 Rc2 21.Rf6 Rcxc4 22.Rf7+ Ke8
-/+ (-0.86) Depth: 29 00:47:13 4804mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.Rb8 Rb1+ 14.Kc4 Ra2 15.Re8+ Kd6 16.Rd8+ Ke7 17.Rb8 Ra3 18.Kd5 Rd1+ 19.Kc5 Rxc3+ 20.Kb4 Rc7 21.b6 Rb1+ 22.Ka3 Rc5 23.Ka2 Rbc1 24.a7 Ra5+
-/+ (-0.86) Depth: 30 00:56:53 5794mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.a6 Ra2 9.Kd3 Rad2+ 10.Kc4 Rxe4+ 11.Kb3 Re1 12.b5 Ra1 13.Rb8 Rb1+ 14.Kc4 Ra2 15.Re8+ Kd6 16.Rd8+ Ke7 17.Rb8 Ra3 18.Kd5 Rd1+ 19.Kc5 Rxc3+ 20.Kb4 Rc7 21.b6 Rb1+ 22.Ka3 Rc5 23.Ka2 Rbc1 24.a7 Ra5+
-/+ (-0.86) Depth: 30 01:04:40 6578mN
1.Rc7+ Ke6 2.Rb7 Rhd2+ 3.Kc5 Rf2 4.Kd4 Rad2+ 5.Kc5 Rc2 6.Kd4 Rfd2+ 7.Kc4 Re2 8.Rb6+ Ke5 9.Rb7 Re3 10.Rxf7 Rexc3+ 11.Kb5 Rb2 12.Rb7 Rcb3 13.Kc5 Ra2 14.Kb5 Kxe4 15.Re7+ Kd5 16.Rd7+ Ke5 17.Re7+ Kd6 18.Rh7 Rc3 19.Rh6+ Kd5 20.a6 Rc8 21.Rh5+ Ke6 22.Rh7 Kd6 23.Rh6+ Ke5 24.Rh5+ Kf6
-/+ (-0.87) Depth: 31 01:27:14 8916mN
(, Microsoft 29.03.2012)
Actually I fed Komodo analysis into Idea. Few mins running is enough. It found that AFAIK.
It switches to other moves and then switches back to Rb8 also.
It switches to other moves and then switches back to Rb8 also.
![[ru]](/mwf/v12/flags/ru.png "Russian Federation")
Komodo may be scared by 1. ...Rh4
Analysis by Deep Rybka 4.1 w32-1:
1.Rc8-c7+ Ke7-e6 2.Rc7-b7 Rh2-h4 3.Rb7-b6+ Ke6-d7[] 4.Rb6-b7+ Kd7-d6 5.Rb7xf7 Ra2-e2 6.Rf7-f6+ Kd6-e7 7.Rf6-c6 Re2xe4+ 8.Kd4-c5 Re4-c4+ 9.Kc5-b6 Rc4xc6+ 10.Kb6xc6 Ke7-d8 11.Kc6-b7 Rh4-h7+ 12.Kb7-b6 Kd8-c8 13.a5-a6 Kc8-b8
-/+ (-0.84) Depth: 18 00:02:20 14256kN, tb=3083
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+ 4.Kd4-c4[] Rd2-d3 5.Kc4-b5 Rd3xc3 6.Kb5-b6 Rh3-h6 7.b4-b5 Kd6-e5+ 8.Kb6-b7 Ke5xe4 9.Rf7-e7+ Ke4-d5 10.Re7-g7 Rc3-a3 11.Rg7-g5+ Kd5-c4 12.b5-b6 Kc4-b4 13.Kb7-a6 Rh6-e6 14.Rg5-g4+ Kb4-c5
-/+ (-0.96) Depth: 19 00:03:11 19900kN, tb=4129
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+ 4.Kd4-c4[] Rd2-d3 5.Kc4-b5 Rd3xc3 6.Kb5-b6 Rh3-h6 7.b4-b5 Kd6-e5+ 8.Kb6-b7 Ke5xe4 9.Rf7-e7+ Ke4-d5 10.Re7-g7 Rc3-a3 11.Rg7-g5+ Kd5-c4 12.b5-b6 Kc4-b4 13.Kb7-a6 Rh6-e6 14.Rg5-g4+ Kb4-c5
-/+ (-0.96) Depth: 20 00:03:31 22031kN, tb=4395
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+ 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.e4-e5+ Kd6xe5 10.Ra8-e8+ Ke5-d6 11.Re8-g8 Ra4-a3 12.Rg8-g6+ Kd6-d5 13.Rg6-g5+ Kd5-d4 14.Rg5-g4+ Kd4-e5 15.Rg4-g5+ Ke5-d6 16.Rg5-g6+
-/+ (-1.17) Depth: 21 00:05:50 39247kN, tb=9265
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+[] 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.Ra8-d8+ Kd6-e5 10.Rd8-d5+ Ke5xe4 11.Rd5-d6 Ra4-a3 12.Rd6-e6+ Ke4-d5 13.Re6-h6 Ra2-a1[] 14.Rh6-h5+ Kd5-e6 15.Rh5-h6+ Ke6-e5 16.Rh6-g6
-/+ (-1.17) Depth: 22 00:10:18 65304kN, tb=23030
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+[] 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.Ra8-d8+ Kd6-e5 10.Rd8-d5+ Ke5xe4 11.Rd5-d6 Ra4-a3 12.Rd6-e6+ Ke4-d5 13.Re6-h6 Ra2-a1[] 14.Rh6-h5+ Kd5-e6 15.Rh5-h6+ Ke6-e5 16.Rh6-g6
-/+ (-1.17) Depth: 23 00:13:28 89834kN, tb=31557
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+[] 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.Ra8-d8+ Kd6-e5 10.Rd8-d5+ Ke5xe4 11.Rd5-d6 Ra4-a3 12.Rd6-e6+ Ke4-d5 13.Re6-h6 Ra2-a1[] 14.Rh6-h5+ Kd5-e6 15.Rh5-h6+ Ke6-e5 16.Rh6-g6
-/+ (-1.17) Depth: 24 00:18:51 130mN, tb=48502
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+[] 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.Ra8-d8+ Kd6-e5 10.Rd8-d5+ Ke5xe4 11.Rd5-d6 Ra4-a3 12.Rd6-e6+ Ke4-d5 13.Re6-h6 Ra2-a1[] 14.Rh6-h5+ Kd5-e6 15.Rh5-h6+ Ke6-e5 16.Rh6-g6
-/+ (-1.17) Depth: 25 00:23:04 163mN, tb=58160
1.Rc8-b8 Rh2-h4 2.Rb8-b7+ Ke7-e6 3.Rb7-b6+ Ke6-d7 4.Rb6-b7+ Kd7-c6[] 5.Rb7xf7 Ra2-d2+ 6.Kd4-c4 Rh4xe4+[] 7.Kc4-b3[] Rd2-e2 8.Rf7-f5 Re4-e5 9.Rf5-f6+ Re5-e6 10.Rf6-f8 Re6-e8 11.Rf8-f6+ Re2-e6 12.Rf6-f4 Re6-e5 13.Rf4-f1 Re5-e3 14.Rf1-f6+ Re8-e6 15.Rf6-f5 Kc6-b7 16.b4-b5
-+ (-1.42) Depth: 26 01:52:10 728mN, tb=418883
Analysis by Deep Rybka 4.1 w32-1:
1.Rc8-c7+ Ke7-e6 2.Rc7-b7 Rh2-h4 3.Rb7-b6+ Ke6-d7[] 4.Rb6-b7+ Kd7-d6 5.Rb7xf7 Ra2-e2 6.Rf7-f6+ Kd6-e7 7.Rf6-c6 Re2xe4+ 8.Kd4-c5 Re4-c4+ 9.Kc5-b6 Rc4xc6+ 10.Kb6xc6 Ke7-d8 11.Kc6-b7 Rh4-h7+ 12.Kb7-b6 Kd8-c8 13.a5-a6 Kc8-b8
-/+ (-0.84) Depth: 18 00:02:20 14256kN, tb=3083
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+ 4.Kd4-c4[] Rd2-d3 5.Kc4-b5 Rd3xc3 6.Kb5-b6 Rh3-h6 7.b4-b5 Kd6-e5+ 8.Kb6-b7 Ke5xe4 9.Rf7-e7+ Ke4-d5 10.Re7-g7 Rc3-a3 11.Rg7-g5+ Kd5-c4 12.b5-b6 Kc4-b4 13.Kb7-a6 Rh6-e6 14.Rg5-g4+ Kb4-c5
-/+ (-0.96) Depth: 19 00:03:11 19900kN, tb=4129
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+ 4.Kd4-c4[] Rd2-d3 5.Kc4-b5 Rd3xc3 6.Kb5-b6 Rh3-h6 7.b4-b5 Kd6-e5+ 8.Kb6-b7 Ke5xe4 9.Rf7-e7+ Ke4-d5 10.Re7-g7 Rc3-a3 11.Rg7-g5+ Kd5-c4 12.b5-b6 Kc4-b4 13.Kb7-a6 Rh6-e6 14.Rg5-g4+ Kb4-c5
-/+ (-0.96) Depth: 20 00:03:31 22031kN, tb=4395
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+ 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.e4-e5+ Kd6xe5 10.Ra8-e8+ Ke5-d6 11.Re8-g8 Ra4-a3 12.Rg8-g6+ Kd6-d5 13.Rg6-g5+ Kd5-d4 14.Rg5-g4+ Kd4-e5 15.Rg4-g5+ Ke5-d6 16.Rg5-g6+
-/+ (-1.17) Depth: 21 00:05:50 39247kN, tb=9265
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+[] 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.Ra8-d8+ Kd6-e5 10.Rd8-d5+ Ke5xe4 11.Rd5-d6 Ra4-a3 12.Rd6-e6+ Ke4-d5 13.Re6-h6 Ra2-a1[] 14.Rh6-h5+ Kd5-e6 15.Rh5-h6+ Ke6-e5 16.Rh6-g6
-/+ (-1.17) Depth: 22 00:10:18 65304kN, tb=23030
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+[] 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.Ra8-d8+ Kd6-e5 10.Rd8-d5+ Ke5xe4 11.Rd5-d6 Ra4-a3 12.Rd6-e6+ Ke4-d5 13.Re6-h6 Ra2-a1[] 14.Rh6-h5+ Kd5-e6 15.Rh5-h6+ Ke6-e5 16.Rh6-g6
-/+ (-1.17) Depth: 23 00:13:28 89834kN, tb=31557
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+[] 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.Ra8-d8+ Kd6-e5 10.Rd8-d5+ Ke5xe4 11.Rd5-d6 Ra4-a3 12.Rd6-e6+ Ke4-d5 13.Re6-h6 Ra2-a1[] 14.Rh6-h5+ Kd5-e6 15.Rh5-h6+ Ke6-e5 16.Rh6-g6
-/+ (-1.17) Depth: 24 00:18:51 130mN, tb=48502
1.Rc8-b8 Ke7-d6 2.Rb8-b7 Rh2-h3 3.Rb7xf7 Ra2-d2+[] 4.Kd4-c4[] Rd2-c2 5.Kc4-b5 Rh3xc3 6.a5-a6 Rc3-a3 7.Rf7-f8 Rc2-a2 8.Rf8-a8 Ra3-a4 9.Ra8-d8+ Kd6-e5 10.Rd8-d5+ Ke5xe4 11.Rd5-d6 Ra4-a3 12.Rd6-e6+ Ke4-d5 13.Re6-h6 Ra2-a1[] 14.Rh6-h5+ Kd5-e6 15.Rh5-h6+ Ke6-e5 16.Rh6-g6
-/+ (-1.17) Depth: 25 00:23:04 163mN, tb=58160
1.Rc8-b8 Rh2-h4 2.Rb8-b7+ Ke7-e6 3.Rb7-b6+ Ke6-d7 4.Rb6-b7+ Kd7-c6[] 5.Rb7xf7 Ra2-d2+ 6.Kd4-c4 Rh4xe4+[] 7.Kc4-b3[] Rd2-e2 8.Rf7-f5 Re4-e5 9.Rf5-f6+ Re5-e6 10.Rf6-f8 Re6-e8 11.Rf8-f6+ Re2-e6 12.Rf6-f4 Re6-e5 13.Rf4-f1 Re5-e3 14.Rf1-f6+ Re8-e6 15.Rf6-f5 Kc6-b7 16.b4-b5
-+ (-1.42) Depth: 26 01:52:10 728mN, tb=418883
> -+ (-1.42) Depth: 26 01:52:10 728mN, tb=418883
Well finally, do you think this may be a win for Black?
>It took me 20 days to find the correct move Rb8
Om my friend,20 days???well,i must admit that always is a good idea make the analisis slow but fine
You try to find the draw yourself. Its not so easy. I am not a GM. Rook endgames are very tough.
ok Om,i will analize the endgame,and i will say what i think...and of course,i will try to find the draw (or as you said,a win for you )by myself
now im analizing my game against Uly,tomorrow/saturday i will take a look
)by myselfnow im analizing my game against Uly,tomorrow/saturday i will take a look
Because you have used spark, you lost the game.
No. Its one engine who thinks tactically. It conjured up a position where I was on verge of winning.
I think one of reasons why a lot of people think poorly of Rybka in endgames is that Rybka kN/s slow down a lot in some endgames and it appears to take forever to reach next depth.
I find Rybka endgame play very good but often frustratingly slow and i have 12 core setup,2x5680's.
See above AN with Rybka.
I find Rybka endgame play very good but often frustratingly slow and i have 12 core setup,2x5680's.
See above AN with Rybka.
Paul,rybka plays some endgames that even a player rated 1700 elo points knows that is a draw...i cant tell you now examples,since i deleted rybka from my engines a lot of time ago,but i saw endgames where rybka gave clear advantage (bishop+pawn against bishop of the opposite colour) and rybka stubbornly continues playing and giving something like +-,when you cant promote the pawn because the bishops arent of the same colour
edit:other engines with endgame knowledge embedded,knows that endgame is a draw
edit:other engines with endgame knowledge embedded,knows that endgame is a draw
yes i know of these adnormalities.I was talking in general compared to other engines and 90% of GM's games.Esp with tb's loaded.
of course,compared to 90 % GM's games and loaded with tablebases,i think even Crafty will play better than them
tablebases gives the engine the knowledge that hasnt embedded inside...just run the engine without the tablebases,and you will see the 'pure' strength of every single engine playing endgames
i dont remember now the name,but there is some tests to test the force of the engines solving endgames positions(to be tested without using tablebases), (also tests to tactics),and rybka isnt a well performer engine,there are better engines solving endgames (i recall that this test just meassure the pure strength of the engine to solve endgames,without using tablebases)
tablebases gives the engine the knowledge that hasnt embedded inside...just run the engine without the tablebases,and you will see the 'pure' strength of every single engine playing endgames
i dont remember now the name,but there is some tests to test the force of the engines solving endgames positions(to be tested without using tablebases), (also tests to tactics),and rybka isnt a well performer engine,there are better engines solving endgames (i recall that this test just meassure the pure strength of the engine to solve endgames,without using tablebases)
Houdini is good without tbs.see my post here.AN was was without tbs.
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=24603
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=24603
i cant see the link,i press the link and the page isnt loaded
edit:yes,is loaded,but is the same page that we are now
my stupid thing of the day
edit:yes,is loaded,but is the same page that we are now
my stupid thing of the day
my fault.
dont worry...are the analisis by Hounidi at that page the analisis that you want that i look?
yes AN above is what i wanted to show you.
well,that analisis gives a slightly advantage to black,no a won game...and from what i read,the game ended in a draw,and Om was asking if he can won the endgame from the fen diagram he posted,right?
all engines give advantage to black and good of OM to get a draw.
I think he believed he missed something earlier in the game.
I only posted all of above because i thought OM's statement was inaccurate.
I think he believed he missed something earlier in the game.
I only posted all of above because i thought OM's statement was inaccurate.
i will look deeply at that endgame,i love endgames,and i wouldnt make a superficial comment about it,so first i will make analisis,and after i will post my comments
but from a first look(and without using engines),not seems possible promote the pawns and win the game like Om claims
but from a first look(and without using engines),not seems possible promote the pawns and win the game like Om claims
>but from a first look(and without using engines),not seems possible promote the pawns and win the game like Om claims
There is no win. Aim is to find draw after the position i posted.
and before that position?had you chances for a win?or that position that you posted is the better that you obtained Om?i mean if you had chances for a win,but you made a mistake in the game or something similar (im asking since i didnt look the game,only the position)
Ya Ya. I had advantage but not sure of win.
well,we learn more about our blunders and lost games than about our won games Om...
True
one of these days i will make a blunder and lose a game,on occasion i do see a line which my opponent could get me in trouble with but luckily he has never played the move.
One game in wbccc 2011 this happened when i found an improved move for white against my lopez Zaitsev.i mentioned this in the game at the time and my opponent agreed,it was very deep though.
One game in wbccc 2011 this happened when i found an improved move for white against my lopez Zaitsev.i mentioned this in the game at the time and my opponent agreed,it was very deep though.
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