Drawish endgame

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Nordlandia
Posts: 2319
Joined: Fri Sep 25, 2015 7:38 pm
Location: Sortland, Norway

Drawish endgame

Post by Nordlandia » Wed Jun 05, 2019 4:59 pm

Brief overview: white got two pawns for the piece and the remaining pawns are stationated on the kingside. White can hope to trade off everything and rely on the fact that K vs NN is draw. Is there any winning prospects for black here?


Vinvin
Posts: 4243
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Drawish endgame

Post by Vinvin » Wed Jun 05, 2019 9:17 pm

SF likes the line :

[Event "Computer chess game"]
[Site "VINVIN-PC"]
[Date "2019.06.05"]
[Round "?"]
[White "Vinvin"]
[Black "Vinvin"]
[Result "*"]
[FEN "6k1/5pp1/4n2p/B7/1P6/P1n2P2/6PP/6K1 w - - 0 33"]

33. Kf2 Nd5 34. b5 Kf8 35. Ke2 Nc5 36. g4 Nb3 37. Be1 Nd4+ 38. Kd3 Nxb5 39.
Kc4 Nbc7 40. Kc5 Ke7 41. Kc6 Ke6 *

Analyze at the end :

Code: Select all

FEN: 8/2n2pp1/2K1k2p/3n4/6P1/P4P2/7P/4B3 w - - 6 42

Stockfish_19052509_x64_modern:

 37/72	01:21	 818 125 882	10 037 245	-2,64	42.f4 g6 43.Ba5 Ne8 44.f5+ gxf5 45.gxf5+ Ke5 46.Bd2 Nd6 47.Bxh6 Nxf5 48.Bd2 Nd4+ 49.Kb7 Ke6 50.Bh6 Nf5 51.Bc1 Nc3 52.Kb6 Kd5 53.Bg5 Ne4 54.Bc1 Nc5 55.Bg5 Nd6 56.h4 Nc4+ 57.Ka7 Ne6 58.Bc1 Ke4 59.Kb7 Nc5+ 60.Kc7 Kf5 61.Kc6 Nd3 62.Kb5
 38/55	01:21	 818 125 882	10 037 245	-2,74	42.a4 Ne8

User avatar
Eelco de Groot
Posts: 4096
Joined: Sun Mar 12, 2006 1:40 am
Location: Groningen

Re: Drawish endgame

Post by Eelco de Groot » Sat Jun 08, 2019 2:19 pm

I have one deep search with a somewhat rising score, so I think it is promising. But Stockfish probably should have a better kingwalk score or something. I did not get the high score at the end of your PV for some reason, maybe because I had no tablebases, but I get much more drawish score, could be your result is because of the much deeper search at the start position.

Code: Select all

6k1/5pp1/4n2p/B7/1P6/P1n2P2/5KPP/8 b - -

Engine: Kaissa IV NoContempt (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

30/52  0:01   -1.06    1...Nd5 2.Ke2 Kf8 3.Kd3 Ke7 4.g3 Kd6 
                       5.b5 Kc5 6.a4 Ng5 7.Be1 Nf6 8.Kc3 Nxf3 
                       9.Bf2+ Kd6 10.Kb3 Nd5 11.a5 Nd2+ 
                       12.Ka3 Ne4 13.Bd4 Nec3 14.Bxc3 Nxc3 (4.654.773) 2377 

31/55  0:03   -0.96--  1...Nd5 2.Ke2 (7.635.320) 2329 

31/68  0:04   -1.06++  1...Nd5 (11.271.362) 2258 

31/68  0:05   -1.15    1...Nd5 2.Ke2 Kf8 3.Kd3 Ke7 4.g3 Kd6 
                       5.b5 f6 6.h4 Nc5+ 7.Kc4 g5 8.Bb4 Nxb4 
                       9.Kxb4 gxh4 10.gxh4 Nd3+ 11.Ka5 Ne5 
                       12.f4 Ng6 13.b6 Nxf4 14.Ka6 Nd3 (11.764.875) 2258 

32/48  0:05   -1.24++  1...Nd1+ (12.696.610) 2266 

32/48  0:05   -1.17    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nd7 
                       5.Kd4 Kf8 6.Kd5 Nxa4 7.b5 Ke7 8.Kc6 Ne5+ 
                       9.Kd5 f6 10.b6 Kd7 11.b7 Nc6 12.h4 Nb2 
                       13.Bb6 Nd3 14.g4 Ndb4+ (13.013.975) 2275 

33/46  0:05   -1.26++  1...Nd1+ (13.047.214) 2275 

33/47  0:05   -1.36++  1...Nd1+ (13.126.953) 2274 

33/55  0:05   -1.07--  1...Nd1+ 2.Ke2 (13.627.490) 2280 

33/58  0:07   -1.14    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Kd4 Nh4 13.Ke3 Ke6 14.Ke4 Ng6 (17.034.600) 2290 

34/53  0:07   -1.23++  1...Nd1+ (18.119.300) 2284 

34/53  0:08   -1.30    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.Kc4 Nd7 7.b5 Kf8 8.Kb4 Nac5 
                       9.Kc4 Ke8 10.Kd5 Nd3 11.Bc7 N7e5 
                       12.Bxe5 Nxe5 13.Kd6 Kd8 14.b6 Nc4+ (19.221.764) 2278 

35/47  0:09   -1.20--  1...Nd1+ 2.Ke2 (20.726.445) 2280 

35/49  0:09   -1.30++  1...Nd1+ (21.006.268) 2278 

35/53  0:10   -1.31    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.Kd5 Nc3+ 7.Kc6 Ne6 8.b5 Nd4+ 
                       9.Kc5 Ncxb5 10.Bb6 Kf7 11.Kc4 Nf5 
                       12.Kxb5 Nh4 13.Kc4 Nxg2 14.Kd5 g5 (24.203.119) 2281 

36/60  0:11   -1.22--  1...Nd1+ 2.Ke2 (26.606.070) 2296 

36/60  0:12   -1.12--  1...Nd1+ 2.Ke2 (29.582.758) 2291 

36/60  0:12   -1.22++  1...Nd1+ (29.728.148) 2290 

36/60  0:13   -1.30    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bf2 Nf4+ 13.Ke4 Ng6 14.Be3 Ke6 (30.661.405) 2285 

37/67  0:14   -1.21--  1...Nd1+ 2.Ke2 (32.970.505) 2282 

37/67  0:14   -1.21    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bf2 Nf4+ 13.Ke4 Ke6 14.Be3 Ng6 (33.636.280) 2288 

38/51  0:17   -1.12--  1...Nd1+ 2.Ke2 (39.504.999) 2282 

38/52  0:17   -1.21++  1...Nd1+ (39.820.667) 2283 

38/52  0:18   -1.27    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bf2 Nf4+ 13.Ke4 Ke6 14.Be3 Ng6 (42.058.423) 2285 

39/52  0:19   -1.36++  1...Nd1+ (45.035.897) 2287 

39/79  0:20   -1.31    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bc7 Nh4 13.Ke4 Ke6 14.Bb6 Nf5 (47.102.232) 2285 

40/69  0:22   -1.36    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bc7 Nh4 13.Ke4 Ke6 14.Bb6 Nf5 (50.834.025) 2287 

41/67  0:24   -1.36    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bc7 Nh4 13.Ke4 Ke6 14.Bb6 Nf5 (56.034.710) 2293 

42/55  0:26   -1.36    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bc7 Nh4 13.Ke4 Ke6 14.Bb6 Nf5 (61.565.724) 2286 

43/95  0:31   -1.37    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bc7 Nh4 13.Ke4 Ke6 14.Bb6 Nf5 (71.824.471) 2291 

44/58  0:35   -1.37    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bc7 Nh4 13.Ke4 Ke6 14.Bb6 Nf5 (81.387.827) 2290 

45/86  0:39   -1.37    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bc7 Nh4 13.Ke4 Ke6 14.Bb6 Nf5 (89.541.504) 2291 

46/65  0:46   -1.37    1...Nd1+ 2.Ke2 Nb2 3.a4 Nf8 4.Ke3 Nxa4 
                       5.Kd4 f6 6.b5 Kf7 7.Kd5 Ng6 8.b6 Nf4+ 
                       9.Kc4 Nxb6+ 10.Bxb6 Nxg2 11.Kd5 g5 
                       12.Bc7 Nh4 13.Ke4 Ke6 14.Bb6 Nf5 (107.568.473) 2292 

47/68  1:06   -1.27--  1...Nd1+ 2.Ke2 (153.099.367) 2297 

47/68  1:20   -1.18--  1...Nd1+ 2.Ke2 (184.855.183) 2292 

47/68  1:25   -1.27++  1...Nd1+ (196.268.290) 2289 

47/68  2:07   -1.04--  1...Nd1+ 2.Ke2 (289.476.439) 2262 

47/91  2:50   -1.25++  1...Nd5 (386.615.118) 2269 

47/91  3:05   -1.61++  1...Nd5 (420.240.046) 2263 

47/146 8:06   -1.61    1...Nd5 2.Ke2 Ndf4+ 3.Kf1 Kf8 4.b5 Nd5 
                       5.Be1 Ke7 6.a4 Kd6 7.a5 Kc5 8.b6 Kc6 
                       9.Kf2 Nc5 10.Bd2 Kb5 11.g4 Ka6 
                       12.Kg3 Nb3 13.Be1 Nd4 14.Kf2 g5 (1.069.052.682) 2198 

48/66  9:19   -1.61    1...Nd5 2.Ke2 Ndf4+ 3.Kf1 Kf8 4.b5 Nd5 
                       5.Be1 Ke7 6.a4 Kd6 7.a5 Kc5 8.b6 Kc6 
                       9.Kf2 Nc5 10.Bd2 Kb5 11.g4 Ka6 
                       12.Kg3 Nb3 13.Be1 Nd4 14.Bf2 Ne2+ (1.222.364.084) 2182 

49/71  10:07  -1.51--  1...Nd5 2.Ke2 (1.322.213.929) 2176 

49/71  10:54  -1.42--  1...Nd5 2.Ke2 (1.418.911.389) 2168 

49/74  11:38  -1.42    1...Nd5 2.Ke2 Ndf4+ 3.Kf1 Kf8 4.b5 Ke8 
                       5.a4 Nd5 6.Be1 Kd7 7.h4 Nd4 8.Bf2 Nb3 
                       9.Ke2 Kd6 10.Be1 Nf4+ 11.Kf1 Kc5 
                       12.Bf2+ Kc4 13.b6 Na5 14.Be1 Nb7 (1.513.920.728) 2166 

50/63  12:02  -1.42    1...Nd5 2.Ke2 Ndf4+ 3.Kf1 Kf8 4.b5 Ke8 
                       5.a4 Nd5 6.Be1 Kd7 7.h4 Nd4 8.Bf2 Nb3 
                       9.Ke2 Kd6 10.Be1 Nf4+ 11.Kf1 Kc5 
                       12.Bf2+ Kd5 13.Be1 Kc4 14.b6 Nc5 (1.566.102.468) 2166 

51/77  12:36  -1.42    1...Nd5 2.Ke2 Ndf4+ 3.Kf1 Kf8 4.b5 Ke8 
                       5.a4 Nd5 6.Be1 Kd7 7.h4 Kc8 8.Ke2 Ndf4+ 
                       9.Kf1 Kb7 10.a5 Nd5 11.g4 Nec7 12.b6 Ne6 
                       13.h5 Nd4 14.Kf2 Nc6 (1.638.494.528) 2165 

52/105 14:45  -1.41    1...Nd5 2.Ke2 Ndf4+ 3.Kf1 Kf8 4.b5 Ke8 
                       5.a4 Nd5 6.Be1 Kd7 7.h4 Kc8 8.Ke2 Ndf4+ 
                       9.Kf1 Kb7 10.a5 Nd5 11.g4 Nec7 12.b6 Ne6 
                       13.h5 Nd4 14.Kf2 Nc6 (1.920.718.228) 2169 

53/68  16:52  -1.31--  1...Nd5 2.Ke2 (2.192.950.847) 2166 

53/73  18:03  -1.41++  1...Nd5 (2.344.468.699) 2164 

53/80  20:04  -1.52    1...Nd5 2.Ke2 Ndf4+ 3.Kf1 Kf8 4.b5 Nd5 
                       5.Ke2 Nc5 6.Be1 Nf4+ 7.Kd2 Nxg2 
                       8.Bf2 Nb7 9.a4 Ke7 10.Kc3 Kd7 11.Kb4 Nf4 
                       12.Bd4 f6 13.a5 Nd5+ 14.Ka4 Nd6 (2.606.911.072) 2164 

54/68  21:31  -1.61++  1...Nd5 (2.791.797.593) 2161 

54/74  25:27  -1.71++  1...Nd5 (3.299.479.228) 2160 

54/79  29:54  -1.47    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Kg2 Nb3 
                       9.Be1 g6 10.Kg3 Nd4 11.Bd2 g5 12.Kf2 Nb3 
                       13.Be1 Nc1 14.Bd2 Nd3+ (3.892.111.220) 2169 

55/85  33:02  -1.43    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Nb3 8.Be1 Kb7 
                       9.Kg3 g6 10.Kh3 Nd4 11.Bd2 g5 12.Kg3 Ka6 
                       13.Kf2 Nb3 14.Be1 Nc5 (4.305.798.432) 2171 

56/90  35:23  -1.43    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Kg2 Nb3 
                       9.Be1 Ka6 10.Kg3 g6 11.Kh4 f6 12.Kg3 Nd4 
                       13.Bd2 g5 14.Kf2 Nb3 (4.614.551.515) 2173 

57/76  37:12  -1.43    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Kg2 Nb3 
                       9.Be1 Ka6 10.Kg3 g6 11.Kh4 f6 12.Kg3 Nd4 
                       13.Bd2 g5 14.Kf2 Nb3 (4.856.648.981) 2175 

58/72  39:33  -1.43    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Kg2 Nb3 
                       9.Be1 Ka6 10.Kg3 g6 11.Kh4 f6 12.Kg3 Nd4 
                       13.Bd2 g5 14.Kf2 Nb3 (5.161.738.782) 2174 

59/77  43:19  -1.43    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Kg2 Nb3 
                       9.Be1 Ka6 10.Kg3 g6 11.Kh4 f6 12.Kg3 Nd4 
                       13.Bd2 g5 14.Kf2 Nb3 (5.657.772.717) 2176 

60/78  48:10  -1.43    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Kg2 Nb3 
                       9.Be1 Ka6 10.Kg3 g6 11.Kh4 f6 12.Kg3 Nd4 
                       13.Bd2 g5 14.Kf2 Nb3 (6.302.511.987) 2180 

61/79  53:23  -1.43    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Kg2 Nb3 
                       9.Be1 Ka6 10.Kg3 g6 11.Kh4 f6 12.Kg3 Nd4 
                       13.Bd2 g5 14.Kf2 Nb3 (7.001.904.591) 2185 

62/92  58:47  -1.43    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd6 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Kg2 Nb3 
                       9.Be1 Ka6 10.Kg3 g6 11.Kh4 f6 12.Kg3 Nd4 
                       13.Bd2 g5 14.Kf2 Nb3 (7.721.572.461) 2189 

63/89  90:54  -1.52++  1...Nd5 (11.899.936.265) 2181 

63/89  110:22 -1.33--  1...Nd5 2.b5 (14.500.308.533) 2189 

63/89  113:46 -1.33    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd7 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Be1 g6 
                       9.Bd2 Nb3 10.Be1 g5 11.Kf1 Nd4 
                       12.Kf2 Ka6 13.Bd2 Nb3 14.Be1 Nc5 (14.961.695.929) 2191 

64/86  118:12 -1.33    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd7 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Be1 g6 
                       9.Bd2 Nb3 10.Be1 g5 11.Kf1 Nd4 
                       12.Kf2 Ka6 13.Bd2 Nb3 14.Be1 Nc5 (15.566.614.466) 2194 

65/88  121:28 -1.43++  1...Nd5 (16.002.859.127) 2195 

65/112 134:14 -1.52++  1...Nd5 (17.764.314.815) 2205 

65/112 137:46 -1.38    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd7 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Be1 Nb3 
                       9.Kg3 g6 10.Kf2 g5 11.Kg3 Nd4 12.Bf2 Ne2+ 
                       13.Kg2 Nc1 14.Kf1 Nb3 (18.272.191.965) 2210 

66/81  149:56 -1.38    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd7 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Be1 Nb3 
                       9.Kg3 g6 10.Kf2 g5 11.Kg3 Nd4 12.Bf2 Ne2+ 
                       13.Kg2 Nc1 14.Kf1 Nb3 (19.918.548.660) 2214 

67/87  172:21 -1.38    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd7 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Be1 Nb3 
                       9.Kg3 g6 10.Kf2 g5 11.Kg3 Nd4 12.Bf2 Ne2+ 
                       13.Kg2 Nc1 14.Kf1 Nb3 (22.909.455.389) 2215 

68/93  211:13 -1.48++  1...Kf8 (28.213.601.252) 2226 

68/93  218:27 -1.57++  1...Kf8 (29.156.802.404) 2224 

68/109 237:20 -1.71++  1...Kf8 (31.682.185.193) 2224 

68/178 308:53 -1.33    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd7 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Be1 Nb3 
                       9.Kg3 g6 10.Kf2 Ka6 11.Kg3 Nd4 
                       12.Bf2 Ne2+ 13.Kg2 h5 14.Bg3 Nd4 (41.051.860.178) 2214 

69/90  324:22 -1.33    1...Nd5 2.b5 Kf8 3.Bd2 Ke7 4.a4 Kd7 
                       5.a5 Nd4 6.b6 Kc6 7.g4 Kb7 8.Be1 Nb3 
                       9.Kg3 g6 10.Kf2 Ka6 11.Kg3 Nd4 
                       12.Bf2 Ne2+ 13.Kg2 h5 14.Bg3 Nd4 (43.119.069.435) 2215 

70/101 365:04 -1.43++  1...Kf8 (48.549.676.075) 2216 

70/101 376:50 -1.52++  1...Kf8 (50.116.856.122) 2216 

70/171 411:22 -1.66++  1...Kf8 (54.724.528.363) 2217 

70/171 430:46 -1.86++  1...Kf8 (57.346.413.603) 2218 

70/186 583:42 -1.53    1...Kf8 2.Ke3 Ke7 3.Kd3 Nd5 4.g3 Kd6 
                       5.b5 Kc5 6.a4 Nd4 7.f4 Nf5 8.Be1 Nd6 
                       9.Bf2+ Kb4 10.Bd4 f6 11.b6 h5 12.a5 Kb5 
                       13.Bb2 Nb4+ 14.Kd4 Kxa5 (78.102.455.010) 2230 

71/88  607:26 -1.44--  1...Kf8 2.Ke3 (81.456.376.104) 2234 

71/88  651:16 -1.35--  1...Kf8 2.Ke3 (87.709.364.581) 2244 

71/102 683:42 -1.44++  1...Kf8 (92.209.688.028) 2247 

71/102 696:32 -1.64++  1...Kf8 (93.953.169.118) 2248 

71/177 765:00 -1.91++  1...Kf8 (103.192.807.186) 2248 

71/184 837:52 -1.80    1...Kf8 2.Ke3 Ke7 3.Kd3 Nd5 4.b5 Kd6 
                       5.g3 Kc5 6.a4 Nd4 7.f4 Nf3 8.h3 f5 
                       9.Ke2 Nd4+ 10.Kd3 h5 11.Be1 h4 
                       12.gxh4 Nxf4+ 13.Kc3 Nxh3 14.Bd2 f4 (112.710.293.763) 2241 

72/90  847:39 -1.70--  1...Kf8 2.Ke3 (114.092.673.310) 2243 

72/94  864:22 -1.80++  1...Kf8 (116.353.639.912) 2243 

72/98  909:49 -1.94++  1...Kf8 (122.638.913.430) 2246 

72/183 1043:36-2.14++  1...Kf8 (140.712.315.906) 2247 

72/183 1120:13-1.61--  1...Kf8 2.Ke3 (151.136.061.525) 2248 

72/183 1149:48-2.00++  1...Kf8 (155.110.598.923) 2248 

72/199 1828:40-2.25    1...Kf8 2.Ke3 Ke7 3.Kd3 Nd5 4.g3 Kd6 
                       5.b5 Kc5 6.a4 Ng5 7.f4 Nf3 8.h3 f5 
                       9.Ke2 Nd4+ 10.Kd3 Nb3 11.Be1 Nf6 
                       12.Kc3 Nd4 13.Kd3 Ne4 14.b6 g6 (248.743.482.337) 2267 

73/88  1837:28-2.15--  1...Kf8 2.Ke3 (249.974.345.552) 2267 

73/88  1840:09-2.06--  1...Kf8 2.Ke3 (250.344.962.157) 2267 

73/98  1878:11-2.15++  1...Kf8 (255.456.539.190) 2266 

73/167 2010:34-1.92--  1...Kf8 2.Ke3 (274.669.085.799) 2276 

73/167 2021:20-2.14++  1...Kf8 (276.239.899.715) 2277 

73/180 2279:28-2.35    1...Kf8 2.Ke3 Ke7 3.Kd3 Nd5 4.g3 Kd6 
                       5.b5 Kc5 6.a4 Ng5 7.Ke2 Kc4 8.b6 Ne6 
                       9.b7 Nd4+ 10.Kd2 Nc6 11.g4 Kc5 12.f4 Kd6 
                       13.g5 Nb8 14.gxh6 gxh6 (313.887.984.249) 2295 

74/83  2284:35-2.26--  1...Kf8 2.Ke3 (314.671.545.240) 2295 

74/83  2286:55-2.16--  1...Kf8 2.Ke3 (315.032.926.885) 2295 

74/83  2296:03-2.26++  1...Kf8 (316.365.072.692) 2296 

74/163 2511:13-2.02--  1...Kf8 2.Ke3 (346.279.954.448) 2298 

74/163 2530:19-2.24++  1...Kf8 (348.769.797.522) 2297 

74/190 2950:12-2.44    1...Kf8 2.Ke3 Ke7 3.Kd3 Nd5 4.g3 Kd6 
                       5.b5 Kc5 6.a4 Ng5 7.Ke2 Kc4 8.b6 Ne6 
                       9.b7 Nd4+ 10.Kf1 Nc6 11.Ke2 Kc5 
                       12.Kd3 Nb8 13.Ke4 Nd7 14.Kd3 Kc6 (404.504.923.976) 2285 

75/96  2956:43-2.35--  1...Kf8 2.Ke3 (405.386.803.181) 2285 

This is not the best Kaissa_IV I think. But this is what has been running.
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan

User avatar
Nordlandia
Posts: 2319
Joined: Fri Sep 25, 2015 7:38 pm
Location: Sortland, Norway

Re: Drawish endgame

Post by Nordlandia » Sat Jun 08, 2019 6:21 pm

Black's material advantage of an mere pawn is probably not enough to convert this endgame.

User avatar
Eelco de Groot
Posts: 4096
Joined: Sun Mar 12, 2006 1:40 am
Location: Groningen

Re: Drawish endgame

Post by Eelco de Groot » Sat Jun 08, 2019 7:32 pm

Yes, you are probably right. In the position at the end of Vincent's PV Black has a Knight against a passed pawn, but they seem to keep each other in equilibrium


Code: Select all

Engine: Kaissa IV NoContempt (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G.

24/44  0:01   -0.68    10.a4 Na6 11.Kb5 Ndc7+ 12.Kc6 Ke7 
                       13.h4 Kd8 14.Kb6 Kc8 15.Bg3 Kd7 
                       16.Be1 g6 17.a5 h5 18.g5 Kc8 19.Bg3 Kd8 
                       20.Bxc7+ Nxc7 21.a6 Nxa6 22.Kxa6 Kd7 
                       23.Kb5 (3.192.437) 1989 

25/42  0:02   -0.75    10.a4 Na6 11.Kb5 Ndc7+ 12.Kb6 Kd7 
                       13.h4 g6 14.a5 h5 15.g5 Kc8 16.Bg3 Kd8 
                       17.Kc6 Ne6 18.Kb6 Nac5 19.a6 Nd7+ 
                       20.Kc6 Nd4+ 21.Kd5 Nf5 22.Bf4 Kc8 
                       23.Kc6 (4.041.125) 2009 

26/39  0:02   -0.84    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Kd7 
                       13.Bg3 Nc8 14.a6 Ned6+ 15.Bxd6 Nxd6+ 
                       16.Kb8 Nb5 17.Kb7 g5 18.h3 Nd6+ 
                       19.Kb8 Nc8 20.Kb7 f6 21.Kb8 Ne7 
                       22.a7 Nc6+ 23.Kb7 (4.939.301) 2021 

27/40  0:02   -0.84    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Kd7 
                       13.Bg3 Nc8 14.a6 Ned6+ 15.Bxd6 Nxd6+ 
                       16.Kb8 Nb5 17.Kb7 g5 18.h3 Nd6+ 
                       19.Kb8 Nc8 20.Kb7 f6 21.Kb8 Ne7 
                       22.a7 Nc6+ 23.Kb7 (5.527.260) 2040 

28/44  0:03   -0.93--  10.a4 Ne8 (6.695.093) 2061 

28/44  0:03   -1.03--  10.a4 Ne8 (7.202.741) 2066 

28/44  0:03   -1.17--  10.a4 Ne8 (7.977.484) 2064 

28/44  0:04   -1.05++  10.f4 (9.501.658) 2075 

28/44  0:04   -0.78++  10.f4 (9.945.631) 2084 

28/44  0:05   -1.37--  10.f4 g6 (10.647.502) 2091 

28/47  0:06   -0.90++  10.a4 (13.590.988) 2083 

28/47  0:06   -1.36    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Kd7 
                       13.Bg3 Nc8 14.a6 Ned6+ 15.Bxd6 Nxd6+ 
                       16.Kb6 Nc8+ 17.Kb7 g5 18.Kb8 Ne7 
                       19.Kb7 Nc6 20.h3 f6 21.Kb6 Kd6 
                       22.Kb7 Kc5 23.Kc7 (13.895.659) 2088 

29/45  0:06   -1.27++  10.a4 (14.160.339) 2090 

29/45  0:06   -1.17++  10.a4 (14.180.982) 2091 

29/45  0:06   -1.03++  10.a4 (14.211.160) 2092 

29/45  0:06   -0.84++  10.a4 (14.301.487) 2092 

29/45  0:07   -0.90    10.a4 Na6 11.Bg3 Nab4+ 12.Kb5 Nc2 
                       13.a5 Kd7 14.a6 Nc7+ 15.Kb6 Nxa6 
                       16.Kxa6 Kc6 17.Ka5 Kd5 18.Kb6 Nd4 
                       19.f4 Ne2 20.Kc7 Nxg3 21.hxg3 Ke4 
                       22.Kd6 Kf3 23.Ke7 (15.337.351) 2078 

30/45  0:08   -0.81++  10.a4 (17.978.485) 2063 

30/45  0:08   -0.71++  10.a4 (18.625.432) 2070 

30/48  0:10   -0.57++  10.a4 (20.678.888) 2064 

30/53  0:11   -0.61    10.a4 Na6 11.Kb5 Ndc7+ 12.Kc6 Ke7 
                       13.a5 g6 14.h4 h5 15.gxh5 gxh5 
                       16.Bf2 Kd8 17.Bg3 Ne6 18.Kb6 Nac7 
                       19.a6 Nxa6 20.Kxa6 Nd4 21.f4 Kd7 
                       22.Bf2 Nf5 23.Kb5 (23.045.889) 2051 

31/44  0:13   -0.70--  10.a4 Ne8 (27.286.105) 2044 

31/44  0:13   -0.79--  10.a4 Ne8 (27.958.869) 2044 

31/46  0:14   -0.70++  10.Bg3 (29.842.974) 2048 

31/46  0:15   -0.50++  10.Bg3 (31.163.314) 2047 

31/48  0:15   -0.70    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Nf6 
                       13.a5 Nd7 14.Bf2 Kd5 15.a6 Nc6 16.f4 Nf6 
                       17.g5 Ne4 18.Be3 h5 19.Kb6 Kd6 
                       20.Kb7 Nc5+ 21.Bxc5+ Kxc5 22.f5 h4 
                       23.f6 (32.716.953) 2050 

32/44  0:16   -0.61++  10.Bg3 (33.916.676) 2047 

32/59  0:16   -0.52++  10.Bg3 (34.717.379) 2046 

32/59  0:18   -0.38++  10.Bg3 (37.540.885) 2045 

32/59  0:19   -0.57    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Nf6 
                       13.a5 Nd7 14.Bf2 Kd5 15.a6 Nc6 16.f4 Nf6 
                       17.h3 h5 18.g5 Ne4 19.Bg1 Nd6+ 
                       20.Kc7 Nb5+ 21.Kb6 Nc3 22.Kc7 f5 
                       23.gxf6 (39.109.229) 2042 

33/51  0:19   -0.66--  10.Bg3 Ne8 (40.399.928) 2036 

33/53  0:20   -0.76--  10.Bg3 Ne8 (41.731.606) 2035 

33/56  0:21   -0.66++  10.Bg3 (43.615.912) 2034 

33/56  0:22   -0.81    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Nf6 
                       13.a5 Nd7 14.Bf2 Kd5 15.a6 Nc6 16.f4 Nf6 
                       17.h3 h5 18.gxh5 Nxh5 19.f5 Nf6 
                       20.Kc7 Ne4 21.a7 Nxa7 22.Bxa7 Ke5 
                       23.Kd7 (44.676.853) 2027 

34/47  0:23   -0.90--  10.Bg3 Ne8 (48.300.638) 2025 

34/54  0:24   -0.87    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Nf6 
                       13.a5 Nd7 14.Bf2 Kd5 15.a6 Nc6 16.f4 Nf6 
                       17.h3 h5 18.gxh5 Nxh5 19.Be3 f5 
                       20.Bd2 Ng3 21.Bc3 g6 22.Bd4 Nh5 
                       23.Be5 (49.908.949) 2025 

35/52  0:27   -0.90    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Nf6 
                       13.a5 Nd7 14.Bf2 Kd5 15.a6 Nc6 16.f4 Nf6 
                       17.h3 h5 18.gxh5 Nxh5 19.Be3 f5 
                       20.Bd2 Ng3 21.Bc3 g6 22.Bd4 Nh5 
                       23.Be5 (56.162.547) 2025 

36/53  0:29   -1.00--  10.Bg3 Ne8 (60.217.316) 2026 

36/53  0:29   -0.90++  10.Bg3 (60.767.342) 2026 

36/53  0:31   -0.76++  10.Bg3 (63.673.518) 2030 

36/59  0:32   -0.56++  10.Bg3 (65.567.031) 2033 

36/61  0:34   -0.38    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Kd7 
                       13.a5 Nc8 14.a6 Ned6+ 15.Bxd6 Nxd6+ 
                       16.Kb8 Nb5 17.Kb7 g5 18.Kb6 Nd6 
                       19.Kc5 Nc8 20.Kd5 Ke8 21.Ke5 Ke7 
                       22.Kd5 Na7 23.Kc5 (69.541.735) 2034 

37/58  0:37   -0.47--  10.Bg3 Ne8 (76.371.834) 2040 

37/58  0:38   -0.56--  10.Bg3 Ne8 (77.649.004) 2041 

37/58  0:41   -0.47++  10.Bg3 (84.698.058) 2045 

37/60  0:46   -0.70--  10.Bg3 Ne8 (95.696.373) 2050 

37/60  0:49   -0.69    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Kd7 
                       13.a5 Nc6 14.a6 Nf6 15.a7 Nxa7 
                       16.Kxa7 Nd5 17.Ka6 Kc6 18.Ka7 Nb6 
                       19.Kb8 Kd7 20.h3 g6 21.Bf4 h5 22.Kb7 Nd5 
                       23.Bh6 (102.033.602) 2054 

38/60  0:52   -0.78--  10.Bg3 Ne8 (108.058.344) 2055 

38/60  0:54   -0.69++  10.Bg3 (111.152.131) 2056 

38/69  0:57   -0.54++  10.Bg3 (119.185.353) 2063 

38/69  0:58   -0.67    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Kd7 
                       13.a5 Nc6 14.a6 Nf6 15.a7 Nxa7 
                       16.Kxa7 Nd5 17.Kb7 f6 18.h3 g6 
                       19.Be1 h5 20.gxh5 gxh5 21.Bd2 Kd6 
                       22.Kc8 Ke6 23.Kd8 (120.399.194) 2064 

39/55  1:02   -0.58++  10.Bg3 (129.740.542) 2061 

39/55  1:03   -0.58    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Kd7 
                       13.a5 Nc6 14.a6 Nf6 15.a7 Nxa7 
                       16.Kxa7 Nd5 17.Kb7 f6 18.h3 g6 
                       19.Be1 h5 20.gxh5 gxh5 21.Bd2 Kd6 
                       22.Kc8 Ke6 23.Kd8 (131.234.696) 2063 

40/58  1:06   -0.67--  10.Bg3 Ne8 (136.797.668) 2062 

40/58  1:07   -0.76--  10.Bg3 Ne8 (139.282.618) 2063 

40/66  1:13   -0.67++  10.Bg3 (151.173.193) 2065 

40/66  1:16   -0.91--  10.Bg3 Ne8 (158.203.300) 2068 

40/66  1:18   -0.69++  10.Bg3 (162.585.861) 2068 

40/89  1:26   -0.90    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Kd7 
                       13.a5 Nc6 14.a6 Nf6 15.Bb8 Nd8+ 
                       16.Kb6 Nd5+ 17.Kc5 Nc7 18.a7 Na8 
                       19.f4 Nb7+ 20.Kb5 g6 21.Be5 Nd6+ 
                       22.Ka6 Nc7+ 23.Kb6 (179.304.788) 2062 

41/69  1:32   -0.81++  10.Bg3 (191.287.984) 2067 

41/69  1:34   -0.71++  10.Bg3 (195.018.858) 2070 

41/69  1:36   -1.00--  10.Bg3 Ne8 (201.491.037) 2077 

41/69  1:41   -1.19--  10.Bg3 Ne8 (210.611.327) 2081 

41/69  1:46   -0.99++  10.Bg3 (221.411.773) 2082 

41/69  1:50   -1.46--  10.Bg3 Ne8 (229.641.615) 2085 

41/69  1:51   -1.04++  10.Bg3 (232.485.855) 2087 

41/128 2:03   -0.57    10.Bg3 Ne8 11.a4 Ne7+ 12.Kb7 Nd6+ 
                       13.Bxd6 Kxd6 14.a5 g5 15.a6 Nc6 
                       16.Kb6 Nb4 17.a7 Nd5+ 18.Kb7 Nc7 
                       19.Kb6 Kd7 20.Kb7 Na8 21.Kb8 Kc6 
                       22.Kc8 Nb6+ 23.Kb8 (257.413.257) 2089 

42/65  2:05   -0.67--  10.Bg3 Ne8 (262.462.078) 2088 

42/65  2:07   -0.57++  10.Bg3 (267.182.790) 2087 

42/65  2:08   -0.76--  10.Bg3 Ne8 (267.845.482) 2087 

42/65  2:09   -0.96--  10.Bg3 Ne8 (270.932.880) 2086 

42/65  2:31   -1.23--  10.Bg3 Ne8 (313.340.164) 2072 

42/71  2:32   -1.00++  10.Bg3 (316.323.976) 2073 

42/71  2:42   -1.16    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.Kc5 Ndc6 
                       16.Bc3 f6 17.a6 Kd7 18.f4 Nc8 19.Be1 Nb8 
                       20.Kb5 Nd6+ 21.Kb6 Nc6 22.Bf2 Nc8+ 
                       23.Kc5 (335.738.221) 2071 

43/62  2:50   -1.07++  10.a4 (351.899.213) 2066 

43/66  3:10   -1.26--  10.a4 Ne8 (390.935.752) 2046 

43/66  3:16   -1.12++  10.a4 (402.194.170) 2042 

43/73  3:44   -1.40--  10.a4 Ne8 (454.243.838) 2027 

43/73  3:58   -1.16++  10.a4 (482.759.802) 2024 

43/73  4:09   -1.67--  10.a4 Ne8 (504.981.241) 2020 

43/73  4:10   -1.23++  10.a4 (506.458.488) 2020 

43/84  4:27   -1.36    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.Kc5 Nxf3 
                       16.Bc3 Kd7 17.Bxg7 Nc6 18.a6 Nxh2 
                       19.Bxh6 Nxg4 20.Bg5 Nf2 21.Be3 Ne4+ 
                       22.Kb6 Nd6 23.Bg1 (538.341.830) 2015 

44/66  4:38   -1.46--  10.a4 Ne8 (560.042.028) 2014 

44/66  4:54   -1.55--  10.a4 Ne8 (591.672.131) 2011 

44/66  5:15   -1.69--  10.a4 Ne8 (632.733.871) 2004 

44/73  6:04   -1.57++  10.Bf2 (733.189.960) 2011 

44/73  6:56   -1.89--  10.Bf2 Ne8 (840.600.005) 2015 

44/73  7:11   -1.60++  10.Bf2 (868.557.616) 2014 

44/102 8:24   -1.74    10.Bf2 Ne8 11.Bc5 Nc3 12.Bd4 Ne2 
                       13.Ba1 Nf4 14.a4 Ng6 15.a5 Ne7+ 
                       16.Kc5 f6 17.Bc3 Nc7 18.f4 Kd7 19.f5 Nc8 
                       20.Bd2 Nd6 21.Be1 h5 22.h3 Ne4+ 
                       23.Kd4 (1.016.919.759) 2015 

45/67  8:33   -1.65++  10.Bf2 (1.034.956.096) 2015 

45/67  8:38   -1.55++  10.Bf2 (1.045.986.199) 2016 

45/71  8:54   -1.84--  10.Bf2 Ne8 (1.077.134.841) 2015 

45/72  10:59  -1.62++  10.Bf2 (1.329.199.735) 2016 

45/72  11:10  -1.36++  10.Bf2 (1.353.750.494) 2019 

45/140 14:55  -1.00++  10.Bf2 (1.810.346.778) 2020 

45/140 15:24  -1.35    10.Bf2 Ne8 11.Bc5 Nc3 12.h4 f6 13.f4 f5 
                       14.gxf5+ Kxf5 15.Bd4 Ne2 16.Bc5 Nc1 
                       17.a4 Nb3 18.Bb4 Nf6 19.Bc3 g6 
                       20.Kb5 Ne4 21.Bg7 h5 22.Kc4 Nbc5 
                       23.a5 (1.868.587.964) 2021 

46/63  15:41  -1.25++  10.Bf2 (1.905.524.840) 2022 

46/78  15:56  -1.16++  10.Bf2 (1.934.585.742) 2023 

46/78  16:08  -1.02++  10.Bf2 (1.959.330.119) 2023 

46/78  17:32  -1.44--  10.Bf2 Ne8 (2.129.974.639) 2023 

46/91  18:05  -1.13++  10.Bf2 (2.196.332.518) 2023 

46/91  19:13  -1.54    10.Bf2 Ne8 11.Bc5 Nc3 12.h4 Na4 
                       13.Bb4 g6 14.h5 gxh5 15.gxh5 Nf6 
                       16.Kb5 Nb2 17.a4 Nd3 18.Bf8 Kd7 
                       19.a5 Kc7 20.Bxh6 Nxh5 21.a6 Ne5 
                       22.Kc5 Ng6 23.Be3 (2.334.167.130) 2024 

47/65  19:32  -1.45++  10.Bf2 (2.374.377.597) 2024 

47/65  19:40  -1.35++  10.Bf2 (2.389.423.166) 2024 

47/77  19:51  -1.26    10.Bf2 Ne8 11.Bc5 Nc3 12.h4 Na4 
                       13.Bb4 g6 14.h5 gxh5 15.gxh5 Nf6 
                       16.Kb5 Nb2 17.a4 Nd3 18.Bf8 Kd7 
                       19.a5 Kc7 20.Bxh6 Nxh5 21.a6 Ne5 
                       22.Kc5 Ng6 23.Be3 (2.413.207.965) 2024 

48/63  20:26  -1.35--  10.Bf2 Ne8 (2.484.793.617) 2025 

48/64  20:44  -1.45--  10.Bf2 Ne8 (2.519.808.070) 2025 

48/73  20:50  -1.35++  10.Bf2 (2.532.880.869) 2025 

48/73  21:17  -1.15++  10.Bf2 (2.589.344.656) 2026 

48/83  21:25  -1.27    10.Bf2 Ne8 11.Bc5 Nc3 12.h4 Na4 
                       13.Bb4 g6 14.h5 gxh5 15.gxh5 Nf6 
                       16.Kb5 Nb2 17.a4 Nd3 18.Bf8 Kd7 
                       19.a5 Kc7 20.Bxh6 Nxh5 21.a6 Ne5 
                       22.Kc5 Ng6 23.Be3 (2.605.953.417) 2026 

49/71  22:12  -1.36--  10.Bf2 Ne8 (2.703.114.455) 2028 

49/71  22:28  -1.46--  10.Bf2 Ne8 (2.736.417.552) 2029 

49/71  23:27  -1.60--  10.Bf2 Ne8 (2.856.171.682) 2029 

49/71  24:40  -1.79--  10.Bf2 Ne8 (3.005.439.628) 2029 

49/74  27:10  -1.63++  10.a4 (3.329.179.279) 2041 

49/87  29:14  -2.06--  10.a4 Ne8 (3.582.561.236) 2042 

49/151 44:01  -1.67++  10.a4 (5.343.861.361) 2023 

49/152 45:05  -1.95    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.f4 Nd5+ 
                       16.Kc5 Nb3+ 17.Kb5 Kd6 18.a6 Nd4+ 
                       19.Kc4 Ne6 20.f5 Nec7 21.a7 Kc6 
                       22.Bf2 Nb6+ 23.Kd3 (5.469.304.473) 2021 

50/73  45:16  -1.86++  10.a4 (5.490.837.283) 2021 

50/73  46:08  -2.05--  10.a4 Ne8 (5.593.069.085) 2020 

50/73  47:33  -1.91++  10.a4 (5.765.250.978) 2020 

50/73  47:34  -1.71++  10.a4 (5.768.160.798) 2020 

50/73  47:38  -1.44++  10.a4 (5.775.271.396) 2020 

50/100 47:44  -1.08++  10.a4 (5.788.062.751) 2020 

50/149 52:27  -2.06    10.f4 g6 11.a4 f5 12.gxf5+ gxf5 
                       13.a5 Na6 14.Bd2 h5 15.Kb5 Nb8 
                       16.Kc5 Nd7+ 17.Kc6 Ne7+ 18.Kb5 Kd5 
                       19.a6 Nc8 20.Be3 Nd6+ 21.Ka5 Ne8 
                       22.a7 Nc7 23.Kb4 (6.343.516.042) 2015 

51/73  52:55  -1.97++  10.f4 (6.400.940.460) 2015 

51/73  54:18  -2.15--  10.f4 g6 (6.572.905.561) 2017 

51/73  58:20  -2.01++  10.a4 (7.067.645.604) 2019 

51/73  58:23  -1.82++  10.a4 (7.074.108.006) 2019 

51/87  63:31  -2.30--  10.a4 Ne8 (7.703.845.266) 2021 

51/101 69:20  -2.28    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.f4 Nd5+ 
                       16.Kc5 Nb3+ 17.Kb5 Kd6 18.a6 Nd4+ 
                       19.Kc4 Nc2 20.Bf2 Na3+ 21.Kb3 Nb5 
                       22.a7 Ndc7 23.Kc4 (8.435.105.861) 2027 

52/74  69:36  -2.18++  10.a4 (8.467.282.987) 2027 

52/74  69:43  -2.09++  10.a4 (8.481.483.023) 2027 

52/74  69:52  -1.95++  10.a4 (8.499.088.606) 2027 

52/79  69:59  -2.15    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.f4 Nd5+ 
                       16.Kc5 Nb3+ 17.Kb5 Kd6 18.a6 Nd4+ 
                       19.Kc4 Ne6 20.f5 Nec7 21.a7 Kc6 
                       22.Bf2 Nf6 23.h3 (8.514.324.895) 2027 

53/76  70:08  -2.05++  10.a4 (8.532.754.439) 2027 

53/76  70:21  -1.96++  10.a4 (8.558.800.806) 2027 

53/76  70:54  -2.24--  10.a4 Ne8 (8.628.981.802) 2028 

53/76  71:33  -2.03++  10.a4 (8.708.055.601) 2028 

53/83  71:59  -1.76++  10.a4 (8.762.726.817) 2028 

53/161 78:54  -2.30    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.f4 Nd5+ 
                       16.Kc5 Nb3+ 17.Kb5 Kd6 18.a6 Nd4+ 
                       19.Kc4 Ne6 20.Ba5 Nec7 21.a7 Na8 
                       22.Bd2 Kc6 23.g5 (9.624.932.926) 2032 

54/83  79:15  -2.20++  10.a4 (9.667.973.394) 2032 

54/83  79:19  -2.11++  10.a4 (9.676.160.138) 2033 

54/83  79:25  -1.97++  10.a4 (9.689.050.596) 2033 

54/83  79:41  -1.98    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.f4 Nd5+ 
                       16.Kc5 Nb3+ 17.Kb5 Kd6 18.a6 Nd4+ 
                       19.Kc4 Ne6 20.Ba5 Nec7 21.a7 Na8 
                       22.Bd2 Kc6 23.g5 (9.722.139.755) 2033 

55/76  80:00  -1.89++  10.a4 (9.759.610.183) 2033 

55/78  80:37  -1.79++  10.a4 (9.835.759.676) 2033 

55/93  85:13  -2.07--  10.a4 Ne8 (10.420.920.713) 2037 

55/93  86:39  -1.86++  10.a4 (10.603.589.210) 2039 

55/111 87:57  -1.60++  10.a4 (10.761.673.559) 2039 

55/118 88:39  -1.61    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.f4 Nd5+ 
                       16.Kc5 Nb3+ 17.Kb5 Kd6 18.a6 Nd4+ 
                       19.Kc4 Ne6 20.Ba5 Kc6 21.a7 Nec7 
                       22.g5 h5 23.f5 (10.850.596.854) 2039 

56/84  93:28  -1.71--  10.a4 Ne8 (11.465.678.994) 2044 

56/84  98:38  -1.80--  10.a4 Ne8 (12.137.633.190) 2050 

56/84  102:26 -1.94--  10.a4 Ne8 (12.618.455.640) 2053 

56/84  110:23 -2.14--  10.a4 Ne8 (13.641.448.505) 2059 

56/89  129:31 -2.41--  10.a4 Ne8 (16.063.970.080) 2066 

56/113 165:29 -2.42    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kc7 Nb5+ 14.Kb6 Nd4 15.Kc7 Nxf3 
                       16.a6 Nd4 17.Kb7 Nb5 18.Kb6 Nd6 
                       19.Kc7 Nd5+ 20.Kc6 Nc8 21.h3 f6 
                       22.Bd2 Nce7+ 23.Kb7 (20.704.170.471) 2085 

57/84  175:36 -2.32++  10.a4 (22.090.126.417) 2096 

57/84  176:13 -2.23++  10.a4 (22.173.688.566) 2097 

57/84  183:13 -2.51--  10.a4 Ne8 (23.150.936.419) 2105 

57/93  203:02 -2.30++  10.a4 (25.825.509.707) 2119 

57/153 229:17 -2.71--  10.a4 Ne8 (29.331.423.108) 2132 

57/153 241:28 -2.71    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kb6 Kd7 14.h4 Nd5+ 15.Kc5 Nc7 
                       16.Bg3 Ne6+ 17.Kd5 Nb5 18.Be5 Nbc7+ 
                       19.Ke4 Kc6 20.h5 Ne8 21.f4 f6 22.Bc3 Nd6+ 
                       23.Ke3 (30.972.446.967) 2137 

58/84  257:24 -2.71    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kb6 Kd7 14.h4 Nd5+ 15.Kc5 Nc7 
                       16.Bg3 Ne6+ 17.Kd5 Nb5 18.Be5 Nbc7+ 
                       19.Ke4 Kc6 20.h5 Ne8 21.f4 f6 22.Bc3 Nd6+ 
                       23.Ke3 (33.162.455.802) 2147 

59/84  270:52 -2.71    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kb6 Kd7 14.h4 Nd5+ 15.Kc5 Nc7 
                       16.Bg3 Ne6+ 17.Kd5 Nb5 18.Be5 Nbc7+ 
                       19.Ke4 Kc6 20.h5 Ne8 21.f4 f6 22.Bc3 Nd6+ 
                       23.Ke3 (34.914.926.130) 2148 

60/81  273:45 -2.61++  10.a4 (35.294.548.938) 2148 

60/90  275:55 -2.71    10.a4 Ne8 11.a5 Ne7+ 12.Kb7 Nd6+ 
                       13.Kb6 Kd7 14.h4 Nd5+ 15.Kc5 Nc7 
                       16.Bc3 Ne6+ 17.Kd5 Nb5 18.Bd2 Ned4 
                       19.Ke4 Nc6 20.Be1 Ke6 21.f4 Nd6+ 
                       22.Kf3 Ne8 23.Bc3 {[fen]4n3/5pp1/2n1k2p/P7/5PPP/2B2K2/8/8 b - -[/fen] This appears to be a draw? Not sure. See the pgn} (35.577.487.635) 2149
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan

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