Endgame

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thewhip
Posts: 23
Joined: Thu Sep 20, 2018 8:50 pm
Full name: Juan Garcia

Endgame

Post by thewhip » Fri Sep 21, 2018 2:38 pm

I do not understand why any engine can´t solve this endgame.

White play and win.
All the engines I used only find a draw.

elcabesa
Posts: 855
Joined: Sun May 23, 2010 11:32 am
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Re: Endgame

Post by elcabesa » Fri Sep 21, 2018 3:24 pm

Vajolet seems to be weak enough to find the correct move at depth 34:

Code: Select all

2018-09-21 17:17:50.128<--1:info multipv 1 depth 23 seldepth 43 score cp 87 upperbound nodes 15998454 nps 1107619 time 14444 pv 
2018-09-21 17:17:50.138<--1:info currmovenumber 1 currmove d4b3 nodes 15998455 time 14444
2018-09-21 17:17:52.218<--1:info multipv 1 depth 23 seldepth 41 score cp 104 nodes 18449242 nps 1115769 time 16535 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3d4 e3e2 d4d3 e2g2 a2a1 c1b2 a1b1 b2a3 d2c4 a3a4 c4b6 a4a5 b6d5 g2g5 d3d4 a5a6 b1b2 g5g4 d4d3 g4g5 d5c7 a6a5 b2a2 a5b4 
2018-09-21 17:17:52.230<--1:info currmovenumber 2 currmove d2c3 nodes 18449242 time 16535
2018-09-21 17:17:53.838<--1:info multipv 1 depth 24 seldepth 50 score cp 104 nodes 20376963 nps 1122388 time 18155 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3d4 e3e2 d4d3 e2g2 a2a1 c1b2 a1b1 b2a3 d2c4 a3a4 c4e3 g2g3 d3d4 g3g8 b1b2 g8h8 e3d5 h8h4 d4e3 h4g4 b2b7 a4a3 b7b1 g4g5 
2018-09-21 17:17:57.705<--1:info multipv 1 depth 25 seldepth 45 score cp 104 nodes 24983373 nps 1134473 time 22022 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3d4 e3e2 d4d3 e2g2 a2a1 c1b2 a1b1 b2a3 d2c4 a3a4 c4e3 g2g3 d3d4 g3g8 e3d5 g8g4 d4e5 g4g5 e5e4 a4a5 b1b8 g5h5 e4d4 h5h3 d4e4 h3h4 e4e3 
2018-09-21 17:18:05.640<--1:info multipv 1 depth 26 seldepth 49 score cp 104 nodes 33158240 nps 1106898 time 29956 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3c4 e3e2 d2b3 c1b1 a2a7 e2c2 c4d5 c2a2 a7g7 a2g2 g7c7 g2c2 c7b7 c2g2 d5c4 b1c2 b3d4 c2c1 c4d3 g2g3 d3e2 g3h3 b7b6 h3c3 b6e6 c3h3 
2018-09-21 17:18:12.275<--1:info multipv 1 depth 27 seldepth 50 score cp 104 nodes 40316490 nps 1101784 time 36592 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3c4 e3e2 d2b3 c1b1 a2a6 e2a2 a6e6 a2e2 e6b6 e2h2 b3d4 b1c1 b6a6 h2h3 a6a1 c1b2 a1f1 h3c3 c4b4 c3h3 f1f2 b2c1 b4c4 c1d1 d4f3 h3h8 f2d2 d1c1 d2g2 
2018-09-21 17:18:26.921<--1:info multipv 1 depth 28 seldepth 59 score cp 104 nodes 57752261 nps 1127137 time 51238 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3c4 e3e2 d2b3 c1b1 a2a6 e2a2 a6e6 a2e2 e6b6 e2h2 b3d4 b1c1 b6a6 h2h3 a6a2 c1d1 d4f5 d1e1 c4d4 h3h8 d4d3 h8d8 f5d4 e1f1 d3e3 d8e8 e3f4 e8d8 f4e4 
2018-09-21 17:18:40.133<--1:info multipv 1 depth 29 seldepth 60 score cp 104 nodes 73168454 nps 1135274 time 64450 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3c4 e3e2 d2b3 c1b1 a2a6 e2c2 c4b4 c2h2 b3d4 h2h8 b4c4 b1b2 a6b6 b2c1 b6e6 c1d1 e6e2 h8h4 e2f2 d1e1 f2b2 e1d1 b2b1 d1d2 b1b3 d2c1 b3d3 h4h8 d3e3 
2018-09-21 17:18:46.580<--1:info multipv 1 depth 30 seldepth 47 score cp 104 nodes 80286642 nps 1132440 time 70897 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3c4 e3e2 d2b3 c1b1 a2a6 e2c2 c4b4 c2h2 b3d4 h2h8 b4c4 b1b2 a6b6 b2c1 b6e6 c1d1 e6e2 h8h4 e2f2 d1e1 f2b2 e1d1 b2b1 d1d2 b1b3 d2c1 b3d3 h4h8 d3e3 h8c8 c4d3 
2018-09-21 17:18:52.715<--1:info multipv 1 depth 31 seldepth 54 score cp 104 nodes 87610168 nps 1137336 time 77031 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 f3f6 g1g5 b3d2 b1c1 f6a6 g5e5 a6a2 e5e3 c3c4 e3e2 d2b3 c1b1 a2a6 e2c2 c4b4 c2h2 b3d4 h2h8 b4c4 b1b2 a6b6 b2c1 b6e6 c1d1 e6e2 h8h4 e2f2 d1e1 f2b2 e1d1 b2b1 d1d2 b1b3 d2d1 b3b2 h4h8 b2a2 h8h4 a2f2 
2018-09-21 17:19:08.915<--1:info multipv 1 depth 32 seldepth 52 score cp 112 lowerbound nodes 105979562 nps 1136741 time 93231 pv d4b3 
2018-09-21 17:19:10.824<--1:info multipv 1 depth 32 seldepth 43 score cp 120 lowerbound nodes 108372244 nps 1139081 time 95140 pv d4b3 
2018-09-21 17:19:14.172<--1:info multipv 1 depth 32 seldepth 45 score cp 132 lowerbound nodes 112211163 nps 1139338 time 98488 pv d4b3 
2018-09-21 17:19:19.798<--1:info multipv 1 depth 32 seldepth 52 score cp 150 lowerbound nodes 118439811 nps 1137597 time 104114 pv d4b3 
2018-09-21 17:19:27.349<--1:info multipv 1 depth 32 seldepth 61 score cp 147 nodes 126654251 nps 1134234 time 111665 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 b3a1 g1e1 e5d4 e1d1 f3e3 a6b7 c3c4 d1c1 c4b4 b7d5 e3d3 c1c8 d3d1 c8c1 d1d2 c1c8 d4e5 d5f7 d2b2 b1c1 b2f2 f7e6 f2f1 c1d2 a1b3 e6b3 b4b3 c8a8 e5c3 d2d3 f1c1 a8a7 c1a1 a7a6 a1d1 d3e4 d1a1 e4d5 b3b2 a6b6 b2a3 
2018-09-21 17:20:02.564<--1:info multipv 1 depth 33 seldepth 53 score cp 155 lowerbound nodes 167063519 nps 1137407 time 146881 pv d4b3 
2018-09-21 17:20:27.570<--1:info multipv 1 depth 33 seldepth 52 score cp 163 lowerbound nodes 196462875 nps 1142983 time 171886 pv d4b3 
2018-09-21 17:20:36.837<--1:info multipv 1 depth 33 seldepth 56 score cp 139 upperbound nodes 207164911 nps 1143584 time 181154 pv 
2018-09-21 17:20:39.278<--1:info multipv 1 depth 33 seldepth 52 score cp 175 lowerbound nodes 210502205 nps 1146557 time 183595 pv d4b3 
2018-09-21 17:20:40.138<--1:info multipv 1 depth 33 seldepth 52 score cp 147 nodes 211739621 nps 1147920 time 184455 pv d4b3 a1b1 d2c3 c4b5 f3e3 a2a1q b3a1 b1a1 f4e5 g7g1 c3b4 a1b1 b4b5 g1g4 e3e2 b1c1 e5c3 g4h4 b5c5 h4a4 e2f2 c1b1 c3b4 a4a2 f2f1 b1c2 c5c4 c2b2 b4c3 b2c2 f1f2 c2b1 f2f1 b1c2 f1f2 c2b1 f2f3 b1c2 c4b4 a2a8 c3e5 
2018-09-21 17:20:44.870<--1:info multipv 1 depth 34 seldepth 50 score cp 155 lowerbound nodes 218087216 nps 1152766 time 189186 pv d4b3 
2018-09-21 17:20:45.824<--1:info multipv 1 depth 34 seldepth 49 score cp 163 lowerbound nodes 219534711 nps 1154589 time 190141 pv d4b3 
2018-09-21 17:20:47.398<--1:info multipv 1 depth 34 seldepth 50 score cp 175 lowerbound nodes 221751132 nps 1156676 time 191714 pv d4b3 
2018-09-21 17:21:03.361<--1:info multipv 1 depth 34 seldepth 58 score cp 177 nodes 241047990 nps 1160681 time 207678 pv d4b3 a1b1 d2c3 c4a6 f4e5 g7g1 b3a1 g1e1 e5d4 e1e4 f3h3 a6f1 h3h1 e4f4 c3b3 f4f3 d4c3 f3f2 h1h6 f2f8 h6b6 f8a8 c3d4 f1g2 b3c3 b1c1 d4e3 c1d1 b6d6 d1e2 e3c5 g2e4 c3b2 a8a5 c5b4 a5a4 d6d2 e2e3 b4c3 a4a6 a1b3 e3f4 d2d1 
2018-09-21 17:21:05.251<--1:info multipv 1 depth 34 seldepth 58 score cp 193 lowerbound nodes 243449907 nps 1161675 time 209568 pv d4c2 
2018-09-21 17:21:05.273<--1:info multipv 1 depth 34 seldepth 29 score cp 220 lowerbound nodes 243490925 nps 1161748 time 209590 pv d4c2 
2018-09-21 17:21:05.319<--1:info multipv 1 depth 34 seldepth 32 score cp 260 lowerbound nodes 243555739 nps 1161808 time 209635 pv d4c2 
2018-09-21 17:21:05.763<--1:info multipv 1 depth 34 seldepth 38 score cp 321 lowerbound nodes 244226636 nps 1162546 time 210079 pv d4c2 
2018-09-21 17:21:07.372<--1:info multipv 1 depth 34 seldepth 41 score cp 412 lowerbound nodes 246666127 nps 1165234 time 211688 pv d4c2 
2018-09-21 17:21:18.710<--1:info multipv 1 depth 34 seldepth 61 score cp 528 nodes 263891274 nps 1183230 time 223026 pv d4c2 b3c2 f3f1 a1b2 f4e5 b2b3 f1f3 b3b4 e5g7 c4b3 f3f4 b4a3 d2c1 b3g8 c1c2 g8h7 c2c1 h7b1 f4f3 a3b4 g7f8 b4c4 c1b2 c4d4 f3a3 d4c4 f8g7 c4b5 g7e5 b5b4 e5c3 b4c4 a3a5 c4d3 a5a4 d3e3 c3e5 e3e2 a4a3 e2d1 a3a4 d1d2 
2018-09-21 17:21:25.718<--1:info multipv 1 depth 35 seldepth 54 score cp 528 nodes 275599072 nps 1198074 time 230035 pv d4c2 b3c2 f3f1 a1b2 f4e5 b2b3 f1f3 b3b4 e5g7 c4b3 f3f4 b4a3 d2c1 b3g8 c1c2 g8h7 c2c1 h7b1 f4f3 a3b4 g7f8 b4c4 c1b2 c4d4 f3a3 d4c4 f8g7 c4b5 g7e5 b5b4 e5c3 b4c4 a3a5 c4d3 a5e5 d3c4 e5e3 c4c5 c3g7 c5c4 e3c3 c4d5 c3f3 b1e4 f3c3 e4b1 c3f3 b1e4 f3g3 e4b1 g7h6 
2018-09-21 17:21:42.824<--1:info multipv 1 depth 36 seldepth 54 score cp 528 nodes 298583818 nps 1208156 time 247140 pv d4c2 b3c2 f3f1 a1b2 f4e5 b2b3 f1f3 b3b4 e5g7 c4b3 f3f4 b4a3 d2c1 b3g8 c1c2 g8h7 c2c1 h7b1 f4f3 a3b4 g7f8 b4c4 c1b2 c4d4 f3a3 d4c4 f8g7 c4b5 g7e5 b5b4 e5c3 b4c4 a3a5 c4d3 a5e5 d3c4 e5e3 c4c5 c3g7 c5c4 e3c3 c4d5 c3f3 b1e4 f3f1 e4b1 f1e1 d5c5 e1e5 c5d4 
2018-09-21 17:21:55.833<--1:info multipv 1 depth 37 seldepth 56 score cp 528 nodes 320190673 nps 1230792 time 260150 pv d4c2 b3c2 f3f1 a1b2 f4e5 b2b3 f1f3 b3b4 e5g7 c4b3 f3f4 b4a3 d2c1 b3g8 c1c2 g8h7 c2c1 h7b1 f4f3 a3b4 g7f8 b4c4 c1b2 c4d4 f3a3 d4c4 f8g7 c4b5 g7e5 b5b4 e5c3 b4c4 a3a5 c4d3 a5e5 d3c4 e5e3 c4c5 c3g7 c5c4 e3c3 c4d5 c3a3 d5e4 b2c1 e4d5 a3e3 b1e4 c1b2 e4b1 
2018-09-21 17:22:54.330<--1:info multipv 1 depth 38 seldepth 59 score cp 536 lowerbound nodes 418796671 nps 1314300 time 318646 pv d4c2 
2018-09-21 17:22:55.580<--1:info multipv 1 depth 38 seldepth 53 score cp 536 nodes 420949245 nps 1315894 time 319896 pv d4c2 b3c2 f3f1 a1b2 f4e5 b2b3 f1f3 b3b4 e5c3 b4a4 c3g7 c4b3 g7c3 a4b5 f3f8 b5c4 f8c8 c4d5 c8b8 b3c4 d2c2 d5e4 b8b4 e4d5 c2b2 d5c5 b4b8 c4f7 b8a8 c5d6 a8a5 f7c4 c3e5 d6c6 a5a8 c4d5 a8a5 d5c4 e5g3 c6b6 a5a8 b6c6 a8a7 c4d5 a7c7 c6b5 c7c3 d5c4 

a lot of stronger engine are no good at "sacrificing" lot of material to win in those position. To be stronger they prune those line and search more promising ones. Sometimes they don't see those win, but in general they are stronger than Vajolet.

thewhip
Posts: 23
Joined: Thu Sep 20, 2018 8:50 pm
Full name: Juan Garcia

Re: Endgame

Post by thewhip » Fri Sep 21, 2018 3:37 pm

Great! It's amazing that top engines can't find a sacrifice like
1. Nc2!
The only key to be able to win.

elcabesa
Posts: 855
Joined: Sun May 23, 2010 11:32 am
Contact:

Re: Endgame

Post by elcabesa » Fri Sep 21, 2018 3:50 pm

maybe with engdame tablebase help they can. but I have not tested.

to solve those endgames usually there are some weakened version of strong engines used for matefinding. generally weaker but ale to find them

User avatar
Ajedrecista
Posts: 1561
Joined: Wed Jul 13, 2011 7:04 pm
Location: Madrid, Spain.
Contact:

Re: Endgame.

Post by Ajedrecista » Fri Sep 21, 2018 4:26 pm

Hello:

According to 'Yet another chess problem database', this problem is from 1981:

http://yacpdb.org/#286033
yacpdb.org wrote:Matouš, Mário
L'Italia Scacchistica (346) 1981
3rd Prize

Solution:

1. Nc2+ $1 (1. Nxb3+ $2 Kb1) (1. Be5 $2 Kb1 $1) 1...
bxc2 2. Rf1+ $1 Bxf1 3. Kc1 Re7 4. Bd2 Rc7 5. Bb4 $1
Rc8 $1 6. Be7 Rc6 7. Bf8 Rg6 8. Bc5 Rg4 9. Ba3 1-0
I do not know what $ symbol stands for in this context. Analysis suggests that 2.- ..., Bxf1 leads to white checkmate while 2.- ..., Kb2 leads to KRB Vs. kbpp and white wins.

Spark 1.0 has found 1.- Nc2+ with 126M nodes searched. I know that Spark is not a top engine, but anyway...

Analysis by Spark 1.0 w32 (2 cores) with 128 MB of hash, in an Intel Pentium D930 at 3 GHz under Arena 2.0.1 GUI:

Code: Select all

FEN: 8/6r1/8/8/2bN1B2/1p3R2/p2K4/k7 w - - 0 1 

Spark-1.0-win32-mp:
   1	00:00	         175	0	-0,37	Nd4c2+ b3xc2 Kd2xc2 Rg7g2+ Kc2c3
   1	00:00	         430	0	+0,07	Nd4xb3+ Ka1b1 Bf4e5 Rg7g2+ Kd2c3
  2/2	00:00	         518	0	+0,07	Nd4xb3+ Ka1b1 Bf4e5 Rg7g2+ Kd2c3
  3/4	00:00	       1.277	0	+0,13	Nd4xb3+ Ka1b1 Kd2c3 Bc4e2 Rf3f2
  4/6	00:00	       3.821	0	+0,13	Nd4xb3+ Ka1b1 Kd2c3 Bc4e2 Rf3f2
  5/8	00:00	       6.819	0	+0,12	Nd4xb3+ Ka1b1 Kd2c3 Bc4e2 Rf3f2 Rg7e7 Bf4g5 Re7c7+ Kc3d4
  6/10	00:00	      17.352	0	+0,12	Nd4xb3+ Ka1b1 Kd2c3 Bc4e2 Rf3f2 Rg7e7 Bf4g5 Re7c7+ Kc3d4
  7/12	00:00	      33.977	311.715	+0,11	Nd4xb3+ Ka1b1 Kd2c3 Bc4e2 Nb3d2+ Kb1c1 Nd2c4+ Kc1b1 Nc4a3+ Kb1a1 Na3c2+ Ka1b1 Rf3f2 Be2d1 Nc2a3+ Kb1a1
  8/17	00:00	      83.434	446.171	+0,22	Nd4xb3+ Ka1b1 Kd2c3 Bc4b5 Nb3d2+ Kb1c1 Nd2c4+ Kc1d1 Rf3f1+ Kd1e2 Rf1a1 Bb5xc4 Kc3xc4
  9/17	00:00	     124.843	420.346	+0,23	Nd4xb3+ Ka1b1 Kd2c3 Bc4b5 Nb3d2+ Kb1c1 Nd2c4+ Kc1d1 Rf3f1+ Kd1e2 Rf1a1 Bb5xc4 Kc3xc4 Rg7a7
 10/18	00:00	     211.113	500.267	+0,24	Nd4xb3+ Ka1b1 Kd2c3 Bc4b5 Nb3d2+ Kb1c1 Nd2c4+ Kc1d1 Rf3f1+ Kd1e2 Rf1a1 Bb5xc4 Kc3xc4 Rg7g4 Ra1xa2+ Ke2f3
 11/22	00:00	     528.810	638.659	+0,18	Nd4xb3+ Ka1b1 Kd2c3 Bc4b5 Nb3d2+ Kb1c1 Nd2c4+ Kc1d1 Rf3f1+ Kd1e2 Nc4d2 Bb5c6 Kc3b2 Bc6d5 Kb2a1 Rg7f7
 12/24	00:01	   1.055.874	767.908	+0,18	Nd4xb3+ Ka1b1 Kd2c3 Bc4b5 Nb3d2+ Kb1c1 Nd2c4+ Kc1d1 Rf3f1+ Kd1e2 Nc4d2 Bb5c6 Kc3b2 Bc6d5 Rf1c1 Rg7g4 Rc1c5
 13/28	00:02	   1.936.093	860.485	+0,18	Nd4xb3+ Ka1b1 Kd2c3 Bc4b5 Nb3d2+ Kb1c1 Nd2c4+ Kc1d1 Rf3f1+ Kd1e2 Nc4d2 Bb5c6 Kc3b2 Bc6d5 Rf1c1 Rg7g4 Rc1c5 Bd5e6
 14/30	00:05	   5.108.614	858.157	+0,19	Nd4xb3+ Ka1b1 Kd2c3 Bc4b5 Nb3d2+ Kb1c1 Kc3b4 a2a1Q Nd2b3+ Kc1d1 Nb3xa1 Rg7b7 Rf3f2 Kd1e1 Rf2d2 Bb5e8+ Kb4c5 Rb7b5+ Kc5c4
 15/32	00:11	   9.709.729	872.784	+0,26	Nd4xb3+ Ka1b1 Kd2c3 Bc4b5 Rf3e3 Rg7g1 Re3e7 a2a1Q+ Nb3xa1 Bb5a4 Na1b3 Ba4xb3 Kc3xb3 Rg1f1 Re7e2 Rf1f3+ Bf4e3 Rf3f1 Re2a2
 16/35	00:18	  16.259.798	900.969	+0,25	Nd4xb3+ Ka1b1 Kd2c3 Bc4a6 Rf3e3 a2a1Q+ Nb3xa1 Kb1xa1 Bf4e5 Rg7b7 Re3e4 Ka1b1 Re4e1+ Kb1a2 Kc3c2 Ka2a3 Re1a1+ Ka3b4 Ra1xa6 Rb7b5 Be5g3 Rb5c5+ Kc2d2 Rc5d5+ Kd2e3
 17/35	00:27	  25.348.500	938.312	+0,25	Nd4xb3+ Ka1b1 Kd2c3 Bc4a6 Rf3e3 a2a1Q+ Nb3xa1 Kb1xa1 Bf4e5 Rg7b7 Re3e4 Ka1b1 Re4e1+ Kb1a2 Kc3c2 Ka2a3 Re1a1+ Ka3b4 Ra1xa6 Rb7b5 Be5g3 Rb5c5+ Kc2d2 Rc5d5+ Kd2e3 Rd5d1
 18/36	02:38	 103.520.736	653.965	+0,17	Nd4xb3+ Ka1b1 Kd2c3 Bc4a6 Bf4e5 Rg7d7 Rf3e3 Rd7d1 Kc3b4 Ba6d3 Nb3a1 Kb1c1 Re3f3 Rd1e1 Na1b3+ Kc1b1 Be5c3 Re1d1 Rf3f2 Bd3c2 Nb3d2+ Kb1c1 Nd2f3
 18/40+	03:17	 126.365.417	640.129	+0,50	Nd4c2+ b3xc2
 18/40+	03:19	 127.129.699	637.993	+1,75	Nd4c2+ b3xc2
 18/40	03:31	 133.197.741	630.942	+2,27	Nd4c2+ b3xc2 Rf3f1+ Ka1b2 Bf4e5+ Kb2b3 Rf1f3+ Kb3b4 Be5xg7 Bc4b3 Rf3g3 Bb3a4 Bg7f8+ Kb4c4 Rg3g4+ Kc4b5 Bf8g7 Ba4b3 Bg7c3 Kb5a6 Rg4b4 c2c1R Kd2xc1 Bb3d5 Kc1b2
 19/40	03:37	 136.247.051	626.740	+2,37	Nd4c2+ b3xc2 Rf3f1+ Ka1b2 Bf4e5+ Kb2b3 Rf1f3+ Kb3b4 Be5xg7 Bc4b3 Rf3f4+ Kb4a3 Kd2c1 Bb3d5 Kc1xc2 Bd5b3+ Kc2c1 Bb3d5 Rf4f2 Ka3b3 Rf2e2 Bd5c4 Re2e3+ Kb3a4 Kc1b2 Bc4g8 Re3a3+ Ka4b5
 20/42	03:56	 156.862.624	664.584	+2,35	Nd4c2+ b3xc2 Rf3f1+ Ka1b2 Bf4e5+ Kb2b3 Rf1f3+ Kb3b4 Be5xg7 Bc4b3 Rf3f4+ Kb4a3 Kd2c1 Bb3d5 Kc1xc2 Bd5b3+ Kc2c1 Bb3d5 Rf4f5 Bd5e4 Rf5a5+ Ka3b3 Bg7f8 Be4b1 Ra5a3+ Kb3c4 Kc1b2 Kc4d4 Bf8g7+ Kd4c5
 21/44	04:27	 198.026.237	740.761	+2,45	Nd4c2+ b3xc2 Rf3f1+ Ka1b2 Bf4e5+ Kb2b3 Rf1f3+ Kb3b4 Be5xg7 Bc4b3 Rf3f4+ Kb4a3 Kd2c1 Bb3d5 Kc1xc2 Bd5b3+ Kc2c1 Bb3d5 Rf4f5 Bd5e4 Rf5a5+ Ka3b3 Bg7f8 Be4b1 Ra5a3+ Kb3c4 Kc1b2 Kc4d4 Bf8g7+ Kd4c5 Kb2a1 Kc5b4
 22/44	05:08	 249.696.403	810.578	+2,45	Nd4c2+ b3xc2 Rf3f1+ Ka1b2 Bf4e5+ Kb2b3 Rf1f3+ Kb3b4 Be5xg7 Bc4b3 Rf3f4+ Kb4a3 Kd2c1 Bb3d5 Kc1xc2 Bd5b3+ Kc2c1 Bb3d5 Rf4f5 Bd5e4 Rf5a5+ Ka3b3 Bg7f8 Be4b1 Ra5a3+ Kb3c4 Kc1b2 Kc4d4 Bf8g7+ Kd4c5 Kb2a1 Kc5b4
 23/49	06:28	 354.555.846	911.785	+2,49	Nd4c2+ b3xc2 Rf3f1+ Ka1b2 Bf4e5+ Kb2b3 Rf1f3+ Kb3a4 Be5xg7 Bc4e2 Rf3e3 Be2d1 Re3g3 Ka4b5 Rg3a3 Kb5c5 Ra3xa2 Kc5b4 Bg7f6 Kb4b3 Ra2b2+ Kb3c4 Kd2c1 Kc4d3 Rb2b3+ Kd3e4 Rb3c3 Ke4f4 Bf6d4
 24/50	09:12	 563.525.983	1.019.725	+2,50	Nd4c2+ b3xc2 Rf3f1+ Ka1b2 Bf4e5+ Kb2b3 Rf1f3+ Bc4d3 Be5xg7 Kb3c4 Rf3g3 Bd3e4 Rg3a3 Be4f5 Ra3xa2 Bf5g6 Ra2a4+ Kc4d5 Ra4d4+ Kd5c5 Rd4d7 Bg6e4 Rd7c7+ Kc5b6 Rc7e7 Be4d3 Re7e1 Bd3h7 Kd2c1 Kb6c5 Re1h1
The right move was found at depth 18 and evals rise up to 250 cp. EGTB were not used, or at least Arena reported '0 TBHits'.

Regards from Spain.

Ajedrecista.

MikeGL
Posts: 1007
Joined: Thu Sep 01, 2011 12:49 pm

Re: Endgame

Post by MikeGL » Fri Sep 21, 2018 5:00 pm

thewhip wrote:
Fri Sep 21, 2018 2:38 pm
I do not understand why any engine can´t solve this endgame.

White play and win.
All the engines I used only find a draw.
I just tried with Critter1.6a 32-bit 2.0 Ghz on my slow dual core, with Multi-PV set to 4.
1st run: found after 1:42
2nd run found after 0:34
3rd run found after 1:22

Second run above was fastest at around 30 seconds giving a +4.xx winning score for Nc2+ of white.
Could be better on 64bit critter on a faster hardware.
Since there's similarity with Houdini, I am sure Houdini can get this puzzle too.
I told my wife that a husband is like a fine wine; he gets better with age. The next day, she locked me in the cellar.

thewhip
Posts: 23
Joined: Thu Sep 20, 2018 8:50 pm
Full name: Juan Garcia

Re: Endgame

Post by thewhip » Fri Sep 21, 2018 5:37 pm

Since there's similarity with Houdini, I am sure Houdini can get this puzzle too.
I tried with Houdini, but can't find the key. It becomes obsessed with 1. Nxb3?, and does not move away from there.

F. Bluemers
Posts: 868
Joined: Thu Mar 09, 2006 10:21 pm
Location: Nederland
Contact:

Re: Endgame

Post by F. Bluemers » Fri Sep 21, 2018 6:08 pm

Dirty:
setboard 8/6r1/8/8/2bN1B2/1p3R2/p2K4/k7 w - - 0 1
analyze
1 35 1 15 Nxb3+ Kb1
1 35 3 55 Nxb3+ Kb1
2 134 4 289 Nxb3+ Kb1 Be5
2 134 4 549 Nxb3+ Kb1 Be5
3 61 6 1433 Nxb3+ Kb1 Kc3 Bb5
3 61 6 2120 Nxb3+ Kb1 Kc3 Bb5
4 69 7 2632 Nxb3+ Kb1 Kc3 Be2 Nd2+ Kc1
4 69 9 3658 Nxb3+ Kb1 Kc3 Be2 Nd2+ Kc1
5 68 10 4367 Nxb3+ Kb1 Kc3 Be2 Nd2+ Ka1 Rh3
5 68 10 6018 Nxb3+ Kb1 Kc3 Be2 Nd2+ Ka1 Rh3
6 68 14 7615 Nxb3+ Kb1 Kc3 Be2 Nd2+ Kc1 Nc4+ Kb1 Na3+ Ka1
6 68 14 9936 Nxb3+ Kb1 Kc3 Be2 Nd2+ Kc1 Nc4+ Kb1 Na3+ Ka1
7 68 17 11611 Nxb3+ Kb1 Kc3 Be2 Nd2+ Kc1 Nc4+ Kb1 Na3+ Ka1 Nc2+ Kb1
7 204 17 13655 Kc3!
7 68 18 23622 Kc3
8 66 20 23622 Kc3?
8 0 20 31339 Kc3 Rg1 Kxc4 b2 Nc2+ Kb1 Na3+ Ka1 Nc2+
8 110 21 38210 Nxb3+ Kb1 Kc3 Be2 Re3 Rg2 Re7 Bd1 Nd2+ Kc1
8 110 21 43564 Nxb3+ Kb1 Kc3 Be2 Re3 Rg2 Re7 Bd1 Nd2+ Kc1
9 119 25 52846 Nxb3+ Kb1 Kc3 Be2 Re3 Rg2 Rh3 Bd1 Be5 a1=Q+ Nxa1
9 119 26 64279 Nxb3+ Kb1 Kc3 Be2 Re3 Rg2 Rh3 Bd1 Be5 a1=Q+ Nxa1
10 121 29 79258 Nxb3+ Kb1 Kc3 Be2 Re3 Rg2 Rh3 a1=Q+ Nxa1 Kxa1 Rh7 Kb1
10 252 32 83923 Kc3!
10 121 35 161028 Kc3
11 116 39 161028 Kc3?
11 0 40 193574 Kc3 b2 Kxc4 b1=Q Nb3+ Qxb3+ Kxb3 Rb7+ Kc2 Rc7+ Bxc7
11 126 42 193574 Nxb3+!
11 184 43 238791 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Kxa1 Kxc4 Rg2 Rf1+ Kb2 Kd3 Rg4 Be5+ Ka3 Ra1+ Kb4
11 184 46 270929 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Kxa1 Kxc4 Rg2 Rf1+ Kb2 Kd3 Rg4 Be5+ Ka3 Ra1+ Kb4
12 202 59 470040 Nxb3+ Kb1 Kc3 Bb5 Nd2+ Kc1 Kb4 Be2 Ra3 Rb7+ Kc3 Rb2 Nb3+ Kb1 Be5 Rc2+ Kb4
12 202 65 547775 Nxb3+ Kb1 Kc3 Bb5 Nd2+ Kc1 Kb4 Be2 Ra3 Rb7+ Kc3 Rb2 Nb3+ Kb1 Be5 Rc2+ Kb4
13 164 75 664754 Nxb3+ Kb1 Kc3 Bb5 Be5 Ra7 Rg3 a1=Q+ Nxa1 Rxa1 Kb3 Ba4+ Kc4 Ra2 Rg1+ Kc2 Rg2+ Kb1
13 164 84 803525 Nxb3+ Kb1 Kc3 Bb5 Be5 Ra7 Rg3 a1=Q+ Nxa1 Rxa1 Kb3 Ba4+ Kc4 Ra2 Rg1+ Kc2 Rg2+ Kb1
14 122 110 1264555 Nxb3+ Kb1 Kc3 Bb5 Rh3 a1=Q+ Nxa1 Kxa1 Rh1+ Ka2 Rh2+ Ka1 Be5 Rb7 Bd4 Bc6 Rf2 Be4
14 122 126 1562589 Nxb3+ Kb1 Kc3 Bb5 Rh3 a1=Q+ Nxa1 Kxa1 Rh1+ Ka2 Rh2+ Ka1 Be5 Rb7 Bd4 Bc6 Rf2 Be4
15 184 156 2080551 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Rb7 Be5 Kxa1 Kxc4+ Kb1 Rf1+ Kc2 Re1 Re7 Re2+ Kb1 Re3 Ra7 Re1+
15 184 173 2368957 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Rb7 Be5 Kxa1 Kxc4+ Kb1 Rf1+ Kc2 Re1 Re7 Re2+ Kb1 Re3 Ra7 Re1+
16 184 200 2803511 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Rb7 Be5 Kxa1 Kxc4+ Kb1 Rf1+ Kc2 Re1 Re7 Re2+ Kb1 Re3 Rd7 Re1+ Kc2
16 184 240 3587216 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Rb7 Be5 Kxa1 Kxc4+ Kb1 Rf1+ Kc2 Re1 Re7 Re2+ Kb1 Re3 Rd7 Re1+ Kc2
17 184 267 4015339 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Rb7 Be5 Kxa1 Kxc4+ Kb1 Rf1+ Kc2 Rh1 Re7 Rh5 Ra7 Rh2+ Kb1 Rf2 Ra2
17 184 312 4862949 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Rb7 Be5 Kxa1 Kxc4+ Kb1 Rf1+ Kc2 Rh1 Re7 Rh5 Ra7 Rh2+ Kb1 Rf2 Ra2
18 184 350 5533081 Nxb3+ Kb1 Kc3 a1=Q+ Nxa1 Rb7 Be5 Kxa1 Kxc4+ Kb1 Rf1+ Kc2 Rh1 Re7 Rh5 Ra7 Rh2+ Kb1 Rf2 Rb7
18 309 398 5805896 Nc2+!
18 370 442 7245018 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Be2 Rf4+ Kb3 Rf8 Bd1 Rb8+ Kc4 Ra8 Kb3 Be5 Be2 Rb8+ Kc4 Kxc2 Kd5 Re8 Ke4
18 370 485 8042175 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Be2 Rf4+ Kb3 Rf8 Bd1 Rb8+ Kc4 Ra8 Kb3 Be5 Be2 Rb8+ Kc4 Kxc2 Kd5 Re8 Ke4
19 370 515 8518147 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Be2 Rf4+ Kb3 Rf8 Bd1 Rb8+ Kc4 Ra8 Kb3 Be5 Be2 Rb8+ Kc4 Kxc2 Kd5 Re8 Ke4
19 370 576 9624940 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Be2 Rf4+ Kb3 Rf8 Bd1 Rb8+ Kc4 Ra8 Kb3 Be5 Be2 Rb8+ Kc4 Kxc2 Kd5 Re8 Ke4
20 403 639 10740297 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Kd5 Rb4 Bc4 Kxc2
20 403 776 13309287 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Kd5 Rb4 Bc4 Kxc2
21 417 856 14777646 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Bd5 Kxc2
21 417 1039 18159349 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Bd5 Kxc2
22 417 1131 19857465 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Bd5 Kxc2
22 417 1532 27325548 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Bd5 Kxc2
23 417 1676 30009328 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Bd5 Kxc2
23 417 2182 39384213 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Bd5 Kxc2
24 420 2434 44151355 Nc2+ bxc2 Rf1+ Kb2 Be5+ Kb3 Rf3+ Ka4 Bxg7 Bb3 Rf4+ Kb5 Bc3 Kc5 Kc1 Bd5 Kxc2 Bc4

MikeGL
Posts: 1007
Joined: Thu Sep 01, 2011 12:49 pm

Re: Endgame

Post by MikeGL » Fri Sep 21, 2018 6:09 pm

thewhip wrote:
Fri Sep 21, 2018 5:37 pm
Since there's similarity with Houdini, I am sure Houdini can get this puzzle too.
I tried with Houdini, but can't find the key. It becomes obsessed with 1. Nxb3?, and does not move away from there.
Tried with free version of Houdini, Houdini 1.5a 32 bit on the same dual core 2.0 Ghz.
It did find Nc2+ in just 0:54 seconds on first run, and 1:48 on second run.

Try setting your Houdini engine to Multi-PV == 4 then set to infinite mode (analysis mode).
I told my wife that a husband is like a fine wine; he gets better with age. The next day, she locked me in the cellar.

tpoppins
Posts: 919
Joined: Tue Nov 24, 2015 8:11 pm
Location: upstate

Re: Endgame

Post by tpoppins » Sat Sep 22, 2018 5:16 am

thewhip wrote:
Fri Sep 21, 2018 2:38 pm
I do not understand why any engine can´t solve this endgame.

White play and win.
All the engines I used only find a draw.
Ever heard of Stockfish? It's not particularly good for analysis, but it does the job in this case:

Code: Select all

Analysis by Stockfish 130918 64 POPCNT (8-core, 2GB hash, 5-men Syzygy):

1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg2 5.Rh3 Bd5 6.Kb4+ Kb1 7.Kc5 Kc2 8.Ra3 
  = (0.09)  Depth: 10/19   00:00:00
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Re7 5.Bd4 Kb1 6.Rf8 Bd5 7.Rd8 Be4 8.Rb8+ Rb7 9.Rxb7+ Bxb7 
  = (0.09)  Depth: 11/19   00:00:00
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Bf6 Bb5 6.Rf5 Ka2 7.Rh5 Ba4 8.Rh1 Rf4 
  = (0.07)  Depth: 12/21   00:00:00
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Rh3 Rg4 5.Be3 Ka2 6.Rh5 Bf1 7.Ra5+ Kb1 8.Kb3 Rg2 9.Ka3 Bc4 
  = (0.05)  Depth: 13/21   00:00:00  895kN, tb=23386
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Rh3 Rg4 5.Rh1+ Ka2 6.Bd6 Rg2 7.Be5 Rb2 8.Rg1 Rb5 9.Rg5 Be2 
  = (0.03)  Depth: 14/21   00:00:00  1084kN, tb=27627
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Bf6 Bb5 6.Rh3 Kb1 7.Rh1+ Ka2 8.Rh2+ Kb1 9.Kb3 Bc4+ 10.Ka3 Bd3 11.Rh5 Bf1 
  = (0.06)  Depth: 15/25   00:00:00  1620kN, tb=39410
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Bf6 Bb5 6.Rh3 Bc6 7.Rd3 Bd5 8.Kd2+ Ka2 9.Rxd5 
  = (0.00)  Depth: 16/28   00:00:00  1966kN, tb=47198
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Rh3 Rg4 5.Bd6 Bd5 6.Rh2 Kb1 7.Rd2 Bc4 8.Ba3 Re4 9.Rd1+ Ka2 10.Bd6 Re2 11.Rf1 Bb5 
  = (0.00)  Depth: 17/28   00:00:00  2053kN, tb=49071
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 18/28   00:00:00  2155kN, tb=51530
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 19/28   00:00:00  2416kN, tb=58030
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 20/19   00:00:00  3061kN, tb=70664
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 21/19   00:00:00  3122kN, tb=71680
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 22/19   00:00:00  3181kN, tb=72673
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 23/19   00:00:00  3317kN, tb=75732
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 24/19   00:00:00  3726kN, tb=85346
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 25/19   00:00:00  4207kN, tb=97851
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 26/19   00:00:01  5053kN, tb=116436
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 27/19   00:00:01  6128kN, tb=145434
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 28/19   00:00:01  7399kN, tb=178894
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 29/19   00:00:01  9014kN, tb=218801
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 30/19   00:00:01  9546kN, tb=231137
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 31/19   00:00:01  10495kN, tb=253266
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 32/19   00:00:01  13668kN, tb=333460
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 33/19   00:00:01  15887kN, tb=387132
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 34/19   00:00:02  18714kN, tb=454305
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 35/19   00:00:02  21519kN, tb=521873
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 36/19   00:00:02  25707kN, tb=621247
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 37/19   00:00:03  29835kN, tb=719303
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 38/19   00:00:03  33756kN, tb=808396
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 39/19   00:00:03  40890kN, tb=985376
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 40/19   00:00:04  46007kN, tb=1104678
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 41/19   00:00:04  52032kN, tb=1255404
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 42/19   00:00:05  59874kN, tb=1434670
1.Nxb3+ Kb1 2.Kc3 a1Q+ 3.Nxa1 Kxa1 4.Be5 Rg4 5.Rf8 Re4 6.Bd6 Re3+ 7.Kc2 Re2+ 8.Kc1 Re1+ 9.Kd2 Re2+ 
  = (0.00)  Depth: 43/19   00:00:06  78796kN, tb=1889378
1.Nc2+ 
  = (0.08 ++)  Depth: 44/19   00:00:08  97912kN, tb=2319764
1.Nc2+ 
  = (0.17 ++)  Depth: 44/19   00:00:08  97955kN, tb=2320898
1.Nc2+ 
  = (0.30 ++)  Depth: 44/19   00:00:08  97966kN, tb=2321098
1.Nc2+ 
  +/= (0.48 ++)  Depth: 44/19   00:00:08  97977kN, tb=2321309
1.Nc2+ 
  +/- (0.73 ++)  Depth: 44/19   00:00:08  97997kN, tb=2321631
1.Nc2+ 
  +/- (1.07 ++)  Depth: 44/19   00:00:08  98199kN, tb=2326396
1.Nc2+ 
  +/- (1.52 ++)  Depth: 44/19   00:00:08  99430kN, tb=2351010
1.Nc2+ 
  +- (2.10 ++)  Depth: 44/19   00:00:08  99553kN, tb=2354222
1.Nc2+ 
  +- (2.85 ++)  Depth: 44/19   00:00:08  101MN, tb=2381013
1.Nc2+ 
  +- (3.80 ++)  Depth: 44/19   00:00:08  103MN, tb=2432744
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1R 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Be6 9.Re3 Kd6 10.Be5+ Kc6 11.Bd4 Bd5 12.Bc3 Kb5 13.Re5 Kc5 14.Rf5 Kc6 15.Bd4 Bg8 16.Ra5 Bd5 17.Be5 Bc4 18.Bc3 Bd5 19.Bd4 Kd6 20.Ra6+ Kc7 21.Ra7+ Kc6 22.Rg7 Kd6 23.Rg6+ Kc7 24.Be5+ Kb7 25.Rg5 Kc6 26.Bf6 Bc4 
  +- (4.20)  Depth: 44/54   00:00:09  120MN, tb=2797869
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (4.20)  Depth: 45/52   00:00:10  132MN, tb=3015900
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (4.29 ++)  Depth: 46/58   00:00:11  152MN, tb=3400196
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (4.38 ++)  Depth: 46/58   00:00:12  172MN, tb=3619862
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (4.51 ++)  Depth: 46/58   00:00:13  184MN, tb=3725026
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (4.69 ++)  Depth: 46/58   00:00:13  195MN, tb=3820812
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (4.94 ++)  Depth: 46/61   00:00:16  239MN, tb=4161690
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (5.28 ++)  Depth: 46/61   00:00:19  305MN, tb=4710791
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (5.72 ++)  Depth: 46/61   00:00:20  311MN, tb=4783192
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (6.30 ++)  Depth: 46/61   00:00:20  320MN, tb=4908701
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (7.05 ++)  Depth: 46/66   00:00:23  368MN, tb=5289562
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (8.01 ++)  Depth: 46/66   00:00:27  442MN, tb=5911091
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (9.23 ++)  Depth: 46/70   00:00:31  522MN, tb=6268120
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (10.77 ++)  Depth: 46/70   00:00:33  570MN, tb=6612019
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (12.73 ++)  Depth: 46/77   00:00:34  578MN, tb=6692490
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (15.20 ++)  Depth: 46/77   00:00:34  580MN, tb=6720955
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (18.30 ++)  Depth: 46/77   00:00:34  580MN, tb=6733750
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (49.37 ++)  Depth: 46/77   00:00:34  580MN, tb=6734854
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (55.19 ++)  Depth: 46/77   00:00:34  581MN, tb=6748428
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (63.03 ++)  Depth: 46/77   00:00:34  588MN, tb=6841106
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 c1Q+ 6.Kxc1 Bd5 7.Rd3 Kc5 8.Kb2 Kc6 9.Be5 Bf7 10.Bd4 Kd5 11.Rf3 Be6 12.Rf4 Kd6 13.Rf6 Ke7 14.Be5 Bd5 15.Ra6 Bc4 16.Rb6 Bd5 17.Rb5 Ke6 18.Bd4 Kd6 19.Rc5 Be6 20.Ra5 Bc4 21.Rg5 Be6 22.Rg6 Kd7 23.Be5 Bc4 24.Ka1 Be6 25.Rh6 Bc4 26.Rf6 Ke7 27.Rg6 
  +- (153.18 ++)  Depth: 46/77   00:00:34  588MN, tb=6849807
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 Be2 6.Rf7 Bd3 7.Rb7+ Ka3 8.Kc1 Be4 9.Bb2+ Ka4 10.Ra7+ Kb3 11.Ra3+ Kb4 12.Rxa2 Kc4 13.Ra5 Kd3 14.Ra3+ Kc4 15.Kd2 Bh7 16.Ra7 Bg6 17.Rd7 Kb3 18.Ba1 Kc4 19.Rd4+ Kc5 20.Bb2 Bf5 21.Rf4 Bh7 22.Rh4 Bg6 23.Rh6 Be4 24.Ke3 Bc6 25.Kd3 Ba4 26.Rh4 Kb5 27.Kd2 Ka5 28.Bc3+ Kb5 29.Kc1 Bb3 30.Rb4+ Kc5 31.Rxb3 Kd6 
  +- (153.67)  Depth: 46/77   00:00:43  749MN, tb=8701644
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 Be2 6.Rf7 Bd3 7.Rb7+ Ka3 8.Kc1 Be4 9.Bb2+ Ka4 10.Ra7+ Kb3 11.Ra3+ Kb4 12.Rxa2 Kc4 13.Ra4+ Kd3 14.Ra3+ Kc4 15.Kd2 Bf5 16.Rf3 Bh7 17.Rf4+ Kd5 18.Ke3 Ke6 19.Rg4 Kd5 20.Rh4 Bg6 21.Rh6 Bf5 22.Rh5 Ke6 23.Rg5 Bh7 24.Re5+ Kf7 25.Rh5 Kg8 26.Rc5 Bg6 27.Rc8+ Kf7 28.Rc6 Bh7 29.Rc7+ Kg8 30.Rg7+ Kf8 31.Rxh7 Ke8 
  +- (153.67)  Depth: 47/72   00:00:45  784MN, tb=9193191
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Kb4 5.Bxg7 Be2 6.Rf7 Bd3 7.Ra7 Kb3 8.Kc1 Bf5 9.Bb2 Bg6 10.Ra3+ Kc4 11.Rxa2 Be4 12.Ra4+ Kd3 13.Ra3+ Kc4 14.Kd2 Bh7 15.Ra7 Bf5 16.Rf7 Bg6 17.Rf4+ Kd5 18.Ke3 Bh7 19.Rh4 Bg6 20.Rh6 Bf5 21.Rh5 Ke6 22.Rg5 Bh7 23.Re5+ Kf7 24.Rh5 Kg8 25.Rc5 Bg6 26.Rc8+ Kf7 27.Rc6 Bh7 28.Rc7+ Kg8 29.Rg7+ Kf8 30.Rxh7 Ke8 
  +- (153.68)  Depth: 48/66   00:00:46  796MN, tb=9431083
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Kb5 10.Kb2 Kc6 11.Kb3 Kd5 12.Re2 Kd6 13.Kc4 Bf5 14.Rd2+ Ke7 15.Bc3 Bg6 16.Kd5 Bf7+ 17.Kc5 Bb3 18.Bd4 Bg8 19.Re2+ Be6 20.Kc6 Kf7 21.Kd6 Bb3 22.Rb2 Bc4 23.Rc2 Bb3 24.Rc3 Bd1 25.Ra3 Kg8 26.Rxa2 Kf7 
  +- (153.71)  Depth: 49/67   00:00:50  867MN, tb=10604526
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Kb5 10.Kb2 Kc4 11.Re8 Kd5 12.Kb3 Kd6 13.Re2 Kd7 14.Kc4 Kd6 15.Bh8 Bg6 16.Rd2+ Ke7 17.Kd5 Bf7+ 18.Kc5 Bg8 19.Re2+ Kf8 20.Kd6 Bb3 21.Rb2 Bc4 22.Rc2 Bb3 23.Rc3 Bd1 24.Ra3 Kg8 25.Ba1 Kh7 26.Rxa2 Kg6 
  +- (153.71)  Depth: 50/67   00:00:51  873MN, tb=10748833
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Kb5 10.Kb2 Kc4 11.Re8 Kd5 12.Kb3 Kd6 13.Re2 Kd7 14.Kc4 Kd6 15.Bh8 Bg6 16.Rd2+ Ke7 17.Kd5 Bf7+ 18.Kc5 Bg8 19.Re2+ Kf8 20.Kd6 Bb3 21.Rb2 Bc4 22.Rc2 Bb3 23.Rc3 Bd1 24.Ra3 Kg8 25.Ba1 Kh7 26.Rxa2 Kg6 
  +- (153.71)  Depth: 51/60   00:00:51  884MN, tb=10985583
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Kb5 10.Re2 Kc4 11.Rd2 Kb3 12.Rd8 Bf5 13.Rd5 Be6 14.Rc5 Kb4 15.Rc7 Ka3 16.Rc3+ Ka4 17.Kb2 Kb5 18.Bd4 Bc4 19.Rc2 Kb4 20.Rc1 Bd5 21.Rc5 Bc4 22.Rg5 Be6 23.Bf2 Bb3 24.Be1+ Kc4 25.Rg3 Kc5 26.Rxb3 Kd6 27.Kxa2 Kd7 
  +- (153.71)  Depth: 52/57   00:00:52  892MN, tb=11168129
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Kb5 10.Re2 Kc4 11.Rd2 Kb3 12.Rd8 Bf5 13.Rd5 Be6 14.Rc5 Kb4 15.Rc7 Ka3 16.Rc3+ Ka4 17.Kb2 Kb5 18.Bd4 Bc4 19.Rc2 Kb4 20.Rc1 Bd5 21.Rc5 Bc4 22.Rg5 Be6 23.Bf2 Bb3 24.Be1+ Kc4 25.Rg3 Kc5 26.Rxb3 Kd6 27.Kxa2 Kd7 
  +- (153.71)  Depth: 53/60   00:00:52  900MN, tb=11340951
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Bd3 10.Kb2 Bb1 11.Re7 Kd5 12.Kb3 Kc6 13.Kc4 Kd6 14.Re2 Bf5 15.Rd2+ Ke7 16.Bh8 Bg6 17.Rg2 Bf7+ 18.Kc5 Be6 19.Re2 Kf7 20.Kd6 Bb3 21.Rb2 Bc4 22.Rc2 Bb3 23.Rc3 Bd1 24.Ra3 Kg8 25.Ba1 Kh7 26.Rxa2 Kg6 
  +- (153.71)  Depth: 54/73   00:00:54  921MN, tb=11851465
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Bd3 10.Kb2 Bb1 11.Re7 Kd5 12.Kb3 Kc6 13.Kc4 Kd6 14.Re2 Bf5 15.Rd2+ Ke7 16.Bh8 Bg6 17.Rg2 Bf7+ 18.Kc5 Be6 19.Re2 Kf7 20.Kd6 Bb3 21.Rb2 Bc4 22.Rc2 Bb3 23.Rc3 Bd1 24.Ra3 Kg8 25.Ba1 Kh7 26.Rxa2 Kg6 
  +- (153.71)  Depth: 55/66   00:00:55  936MN, tb=12281127
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Bd3 10.Kb2 Bb1 11.Re2 Kd3 12.Re7 Kc4 13.Rd7 Kc5 14.Rd8 Kc6 15.Be5 Kb6 16.Rc8 Kb7 17.Rc3 Kb6 18.Rc7 Ka5 19.Rb7 Ka6 20.Rb8 Ka7 21.Rb4 Ka6 22.Bd4 Ka5 23.Rb6 Ka4 24.Bc3 a1Q+ 25.Kxa1 Ba2 26.Ra6+ Kb5 27.Rxa2 Kc4 28.Rd2 Kxc3 
  +- (153.72)  Depth: 56/59   00:00:58  986MN, tb=13359623
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Kb3 4.Rf3+ Bd3 5.Bxg7 Kc4 6.Re3 Bf5 7.Ra3 c1R 8.Kxc1 Bb1 9.Re3 Bd3 10.Kb2 Bb1 11.Re2 Kd5 12.Kb3 Kd6 13.Kc4 Bf5 14.Rd2+ Ke7 15.Bh8 Bg6 16.Rg2 Bf7+ 17.Kc5 Bb3 18.Re2+ Kf7 19.Rb2 Be6 20.Kd6 Bc4 21.Rc2 Bb3 22.Rc3 Bd1 23.Ra3 Kg8 24.Ba1 Kh7 25.Rxa2 Kg6 
  +- (153.72)  Depth: 57/74   00:00:58  995MN, tb=13623602

edit: with TB access off SF needs over five minutes and d=50 to find Nc2. Then it hits a big fail-high; but it's clearly a winning eval:

Code: Select all

Analysis by Stockfish 130918 64 POPCNT (8-core, 2GB hash, SyzygyProbeLimit=0):

1.Nxb3+ Kb1 2.Kc3 Bb5 3.Nd2+ Kc1 4.Kb4 Be2 5.Nc4+ Kd1 6.Ne3+ Kd2 7.Nd5+ Kc2 8.Ra3 Rb7+ 9.Kc5 Kb2 10.Ra5 Rd7 11.Be5+ Kb1 
  +/= (0.58)  Depth: 10/20   00:00:00
1.Nxb3+ Kb1 2.Kc3 Bb5 3.Nd2+ Kc1 4.Kb4 Rb7 5.Nc4+ Kd1 6.Rd3+ Ke2 7.Ra3 Bxc4+ 8.Kxc4 
  +/= (0.69)  Depth: 11/27   00:00:00
1.Nxb3+ Kb1 2.Kc3 Bb5 3.Nd2+ Kc1 4.Kb4 Be2 5.Nc4+ Kd1 6.Ne3+ Ke1 7.Nc2+ Kd1 8.Rc3 Ra7 9.Na1 Bg4 10.Rc1+ Ke2 
  +/- (0.90)  Depth: 12/27   00:00:00
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rb7 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kc2+ Ka2 7.Re1 Ka3 8.Ra1+ Kb4 9.Rxa6 Rb5 10.Bf6 Rc5+ 11.Kd2 
  +/- (0.87)  Depth: 13/27   00:00:00  885kN
1.Nxb3+ Kb1 2.Kc3 Bb5 3.Re3 a1Q+ 4.Nxa1 Kxa1 5.Be5 Rg1 6.Kb4+ Kb1 7.Kxb5 Kc2 8.Kc4 Rg5 9.Kd4 Rg4+ 10.Kc5 Rg5 
  +/- (0.98)  Depth: 14/28   00:00:00  1764kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rh2 Be4 12.Rh4 Bf3 13.Kc2 Bd5 
  +/= (0.48)  Depth: 15/28   00:00:00  2141kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rh2 Be4 12.Rh4 Bf3 13.Kc2 Bd5 14.Ra4+ Ba2 15.Rb4 Be6 
  +/= (0.48)  Depth: 16/30   00:00:00  2480kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rh2 Be4 12.Rh4 Bf3 13.Kc2 Bd5 14.Ra4+ Ba2 15.Rd4 Bb1+ 16.Kc1 Ba2 17.Rd3 
  +/= (0.48)  Depth: 17/33   00:00:00  2830kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rh2 Be4 12.Rh4 Bf3 13.Kc2 Bd5 14.Ra4+ Ba2 15.Rd4 Bb1+ 16.Kc1 Ba2 17.Rd3 
  +/= (0.48)  Depth: 18/33   00:00:00  2909kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rh2 Be4 12.Rh4 Bf3 13.Kc2 Bd5 14.Ra4+ Ba2 15.Rd4 Bb1+ 16.Kc1 Ba2 17.Rd3 
  +/= (0.48)  Depth: 19/33   00:00:00  3972kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rh2 Be4 12.Rh4 Bf3 13.Kc2 Bd5 14.Ra4+ Ba2 15.Rd4 Bb1+ 16.Kc1 Ba2 17.Rd3 
  +/= (0.48)  Depth: 20/33   00:00:00  4471kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rg4 Bd3 15.Rg2 Bb1 16.Ka3 Bh7 17.Rb2 
  +/= (0.48)  Depth: 21/34   00:00:00  5218kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rg4 Bd3 15.Rg2 Bb1 16.Ka3 Bh7 17.Rb2 
  +/= (0.48)  Depth: 22/34   00:00:00  6540kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 
  +/= (0.48)  Depth: 23/35   00:00:00  7434kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 
  +/= (0.48)  Depth: 24/38   00:00:00  9796kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 
  +/= (0.48)  Depth: 25/40   00:00:01  12474kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 
  +/= (0.48)  Depth: 26/40   00:00:01  16626kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 
  +/= (0.48)  Depth: 27/40   00:00:01  21221kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 
  +/= (0.48)  Depth: 28/42   00:00:01  26996kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 
  +/= (0.48)  Depth: 29/42   00:00:02  38189kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 
  +/= (0.48)  Depth: 30/45   00:00:03  58203kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 
  +/= (0.48)  Depth: 31/42   00:00:04  64026kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Rb2 
  +/= (0.48)  Depth: 32/47   00:00:05  82225kN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Rb2 Bc4 
  +/= (0.48)  Depth: 33/48   00:00:07  110MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Kc2 Bf5+ 25.Kc3 Ka2 26.Rb2+ Ka1 
  +/= (0.48)  Depth: 34/50   00:00:10  154MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Re1 Bb1 
  +/= (0.48)  Depth: 35/50   00:00:10  170MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Re1 Bc4 26.Re5 Ba2 
  +/= (0.48)  Depth: 36/52   00:00:15  248MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Re1 Bc4 26.Re5 Ba2 
  +/= (0.48)  Depth: 37/48   00:00:19  300MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Re1 Bc4 26.Re4 Bd5 27.Re2 Bc4 
  +/= (0.48)  Depth: 38/54   00:00:20  329MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Re5 Bh7 28.Rh5 
  +/= (0.48)  Depth: 39/57   00:00:29  462MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Ra7+ Kb1 28.Rb7+ Ka2 29.Rb2+ Ka1 30.Rb5 Be4 
  +/= (0.48)  Depth: 40/60   00:00:38  623MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Ra7+ Kb1 28.Rb7+ Ka2 29.Rb2+ Ka1 30.Rf2 
  +/= (0.48)  Depth: 41/59   00:00:39  640MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Ra7+ Kb1 28.Rb7+ Ka2 29.Rb2+ Ka1 30.Rf2 Be4 
  +/= (0.48)  Depth: 42/60   00:00:46  758MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Re1+ Ka2 28.Re2+ Kb1 29.Rb2+ Ka1 30.Rf2 Be4 
  +/= (0.48)  Depth: 43/60   00:00:59  979MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Re1+ Ka2 28.Re2+ Kb1 29.Rd2 Bc8 30.Rb2+ Ka1 
  +/= (0.48)  Depth: 44/60   00:01:09  1143MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Re1+ Ka2 28.Rg1 Be4 29.Rd1 Bf5 30.Rd2+ Ka1 
  +/= (0.48)  Depth: 45/60   00:01:31  1507MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Re2 Bc4 26.Re1 Ka2 27.Kc2 Bd5 28.Re5 Bb3+ 29.Kc3 Bd1 30.Ra5+ Kb1 31.Rb5+ Ka2 32.Rb2+ Ka1 
  +/= (0.48)  Depth: 46/62   00:01:55  1881MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Ra7+ Kb1 28.Rb7+ Ka1 29.Rb5 Bh7 30.Kb3 Kb1 31.Rb8 Bg6 32.Kc3+ Ka2 33.Rb2+ Ka1 
  +/= (0.48)  Depth: 47/64   00:02:24  2310MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Ra7+ Kb1 28.Rb7+ Ka1 29.Rb5 Bh7 30.Kb3 Kb1 31.Rb8 Bg6 32.Kc3+ Ka2 33.Rb2+ Ka1 
  +/= (0.48)  Depth: 48/60   00:02:50  2706MN
1.Nxb3+ Kb1 2.Kc3 Ba6 3.Be5 Rg5 4.Re3 a1B+ 5.Nxa1 Kxa1 6.Kb3+ Rxe5 7.Rxe5 Bd3 8.Re1+ Bb1 9.Re2 Bh7 10.Rb2 Bb1 11.Rf2 Bh7 12.Rf1+ Bb1 13.Rf4 Bh7 14.Rh4 Bd3 15.Rh1+ Bb1 16.Rh5 Ba2+ 17.Kc2 Bb1+ 18.Kc1 Ba2 19.Rg5 Be6 20.Rg6 Ba2 21.Rc6 Bb1 22.Rc7 Ba2 23.Rb7 Be6 24.Re7 Ba2 25.Kc2 Bb1+ 26.Kc3 Bf5 27.Ra7+ Kb1 28.Rb7+ Ka2 29.Rb2+ Ka1 30.Rg2 Kb1 31.Rg1+ Ka2 32.Rf1 Bg6 33.Rf2+ Ka1 
  +/= (0.48)  Depth: 49/66   00:03:38  3444MN
1.Nc2+ 
  +/= (0.57 ++)  Depth: 50/63   00:05:12  4952MN
1.Nc2+ 
  +/= (0.66 ++)  Depth: 50/63   00:05:12  4953MN
1.Nc2+ 
  +/- (0.83 ++)  Depth: 50/63   00:05:12  4953MN
1.Nc2+ 
  +/- (1.27 ++)  Depth: 50/63   00:05:12  4954MN
1.Nc2+ 
  +/- (1.54 ++)  Depth: 50/63   00:05:12  4954MN
1.Nc2+ 
  +- (1.92 ++)  Depth: 50/63   00:05:12  4954MN
1.Nc2+ 
  +- (2.37 ++)  Depth: 50/63   00:05:12  4955MN
1.Nc2+ 
  +- (2.95 ++)  Depth: 50/63   00:05:12  4956MN
1.Nc2+ 
  +- (3.70 ++)  Depth: 50/63   00:05:12  4957MN
1.Nc2+ 
  +- (4.66 ++)  Depth: 50/63   00:05:26  5191MN
1.Nc2+ bxc2 2.Rf1+ Kb2 3.Be5+ Ka3 4.Rf3+ Bb3 5.Bxg7 Ka4 6.Ba1 Bd5 7.Rc3 c1R 8.Kxc1 Kb5 9.Rc2 Be4 10.Rxa2 Kc6 11.Ra6+ Kb7 12.Ra5 Kb6 13.Rg5 Bd3 14.Bf6 Be4 15.Bd4+ Kc7 16.Ra5 Kd8 17.Kb2 Kd7 18.Re5 Bd3 19.Re3 Bg6 20.Bf6 Kc6 21.Re1 Bd3 22.Kc3 Bh7 23.Be7 Bf5 24.Kb2 Bg4 25.Bf6 Kd6 26.Re5 Bd7 27.Ra5 Be6 28.Ra6+ Kd7 
  +- (5.59)  Depth: 50/70   00:08:54  9173MN
Tirsa Poppins
CCRL

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