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Up Topic The Rybka Lounge / Test Positions / Zugzwang matters in light-piece endgames--problem with SF
- - By MaLaoshi (*) [tw] Date 2016-09-28 17:46 Upvotes 1
In some of the endgames in TCEC Season 9, an old evil seems to be rearing its head. Consider the following fragment:

[FEN "8/8/p4Bp1/1pPb2P1/1P2kp2/P7/5K2/8 w - - 0 1"]1. Be7 (1. c6) 1. .. Bc6 2. Ke2 f3+ 3. Kf2 Kd3 4. Bd8 Kc2 5. Ke3 Kb3 6. Bb6
Kxa3 7. Ba5

This is test position 8 from the Nunn endgame suite. The joke is that 1. c6! is the only way to draw for white, otherwise black will play Bc6 and the b6-g1 diagonal will be blocked for white by his own c5 pawn. To see this, one has to consider a few lines; in one of them, we get the position here after 7. Ba5. The black king needs to get out of the corner, and therefore has to gain the opposition without moving Bc6. The way to do this is with 7. ... Ka2!, because the white king cannot go to e2 of course.

Stockfish is quite helpless here, quickly reaching a huge depth with a drawish eval, or sometimes behaving erratically. The cause should be mindless nullmove pruning, which leads to wrong results in a situation where white must be brought into zugzwang. If I understand it right then SF knows that it shouldn't NM-prune in endgames with only pawns. However, when there are only a few pieces like here then it happily NM-prunes away, while in fact zugzwang is still quite common in these endgames.

I suspect that it is better to allow/test for the possibility of zugzwang also in endgames with at most one (light) piece for each side.
Parent - - By Akbarfan (***) Date 2016-10-22 12:26
Good Position and report from you. :cool:
Parent - By MaLaoshi (*) [tw] Date 2016-11-01 03:38 Edited 2016-11-01 04:07
Thanks for the nice words. :smile: About the first time I posted something here
so a bit of feedback helps me to know if my point came across. I might have
added that Nunn's position is from an actual game (Bellon - Minic), so the issue
should be relevant to practical endgame playing strength.

In fact my larger chess analysis projects involve IDeA trees, and then it's harder
to know how to present it in a few paragraphs since often there is not a clear
main line, just a ton of variations...
Parent - - By Eelco de Groot (***) Date 2016-10-24 02:05
Thanks for the position! I borrowed it for a thread in TalkChess

When you mention that is an "old evil" do you or anyone perhaps know of Stockfish versions, not counting Sting I think, that solved (without giving a drawscore though, that is harder) it? It is probably an eval issue and the rules for opposite colored bishops were not always the same, so it's possible older versions would find it.

8/8/p4Bp1/1pPb2P1/1P2kp2/P7/5K2/8 w - -


Engine: Rainbow Serpent 20160903_016 HT (i7 6700, using three hyperthreads, 512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

28/33  0:01   -0.58    1.Ke1 f3 2.Kf2 Kd3 3.Be5 Kc2 4.Bg3 Kb3
                       5.Bc7 Kxa3 6.Ba5 Kb3 7.Ke3 Kc4 8.Kf2 Kd3
                       9.Bb6 Bc6 10.Ba5 Kc4 11.Ke3 Bb7
                       12.Kf2 Bd5 13.Ke3 Ba8 14.Kf2 (23.223.948) 15895
.
.
.

37/48  1:04   -1.71    1.Ke1 f3 2.Kf2 Kd3 3.Bd8 Kc2 4.Bb6 Kb3
                       5.c6 Bxc6 6.Ke3 Kxa3 7.Ba5 Bd5 8.Kf2 Kb3
                       9.Ke1 Kc3 10.Kf1 Bc6 11.Ke1 Kd3
                       12.Bb6 Ke4 13.Kf2 Kf4 14.Be3+ (1.018.682.144) 15699

38/48  1:08   -1.79--  1.Ke1 f3 (1.073.518.694) 15653

38/48  1:09   -1.87--  1.Ke1 f3 (1.090.231.274) 15645

38/48  1:14   -2.00--  1.Ke1 f3 (1.162.970.895) 15677

38/48  1:15   -2.16--  1.Ke1 f3 (1.181.917.890) 15651

38/48  1:24   -2.39--  1.Ke1 f3 (1.320.748.560) 15659

38/48  1:35   -2.70--  1.Ke1 f3 (1.486.783.699) 15648

38/48  1:39   -2.89    1.Ke1 f3 2.Kf2 Kd3 3.Bd8 Kc3 4.Bc7 Kb2
                       5.Ba5 Kxa3 6.Ke3 Kb3 7.Kd3 Bb7 8.Ke3 Kc3
                       9.Kf2 Bc6 10.Ke3 Ba8 11.Kf2 Bd5
                       12.Ke1 Kc4 13.Kf1 Kd4 14.Kf2 (1.563.219.830) 15635

39/55  2:07   -2.86    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Bd8 Kc2
                       5.Bf6 Kb3 6.Bd8 Kxa3 7.Ba5 Kb2 8.Ke3 Kc3
                       9.Kf2 Kd4 10.Bb6+ Ke4 11.Ba5 Kf4
                       12.Bd8 a5 13.Bxa5 Kxg5 14.Ke3 (1.983.633.579) 15519

40/55  2:27   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Bd8 Kd4
                       5.Bc7 Kc3 6.Ba5 Kb3 7.Bd8 Kxa3 8.Ba5 Bd5
                       9.Ke3 Kb3 10.Kf2 Kc3 11.Ke3 Kb2
                       12.Kd2 Kb3 13.Ke3 Kc3 14.Kf2 (2.291.868.073) 15558

41/55  2:40   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kb2
                       9.Bc7 Kc2 10.Kf2 Kb3 11.Bb6 Kc3
                       12.Ba5 Kd3 13.Bb6 Bd5 14.Kg3 (2.485.461.383) 15460

42/55  2:42   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kb2
                       9.Kf2 Bc6 10.Bd8 Kb3 11.Bc7 Kc2
                       12.Kg3 Kc3 13.Kf2 Kd4 14.Bb8 (2.510.784.217) 15450

43/59  2:53   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kb2
                       9.Kf2 Be4 10.Ba5 Bc6 11.Bd8 Bd5
                       12.Ba5 Kc2 13.Kg1 Bc6 14.Bd8 (2.674.198.981) 15371

44/59  3:23   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kb2
                       9.Kf2 Be4 10.Bc7 Kxa3 11.Ba5 Kb3
                       12.Ke3 Kc4 13.Kf2 Bc6 14.Kg3 (3.128.333.844) 15387

45/61  3:39   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kxa3
                       9.Ba5 Kb3 10.Kf2 Bc6 11.Ke3 Kc4
                       12.Kf2 Bb7 13.Ke1 Kc3 14.Kf1 (3.391.435.093) 15425

46/61  3:56   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kxa3
                       9.Ba5 Kb3 10.Kf2 Bd5 11.Ke3 Kb2
                       12.Kf2 Ka3 13.Kg3 Bb7 14.Kf2 (3.630.467.935) 15382

47/61  4:24   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kxa3
                       9.Ba5 Kb3 10.Kf2 Bd5 11.Kg1 Kc3
                       12.Kf1 Kb2 13.Kf2 Kc2 14.Bb6 (4.073.351.155) 15395

48/61  4:52   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kxa3
                       9.Ba5 Kb3 10.Kf2 Kc4 11.Ke3 Bc6
                       12.Kd2 Kd4 13.Ke1 Bb7 14.Kf1 (4.543.467.339) 15546

49/61  5:47   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Bd5 7.Bb6 Bb7 8.Ke3 Kxa3
                       9.Ba5 Kb3 10.Kf2 Kc4 11.Ke3 Bc6
                       12.Kd2 Kd4 13.Ke1 Bd5 14.Kf2 (5.412.166.159) 15552

50/61  7:34   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Bd5 6.Bd8 Kd3 7.Kg3 Kc3 8.Bf6+ Kc4
                       9.Be5 Bc6 10.Bc7 Kd3 11.Bb6 Bb7
                       12.Ba5 Kd4 13.Bb6+ Kc4 14.Bc7 (7.060.360.536) 15539

51/61  9:31   -2.85    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Bd5 6.Bd8 Kd3 7.Kf1 Bc6 8.Kf2 Kc3
                       9.Kf1 Kc4 10.Ba5 Kd3 11.Bd8 Kc3
                       12.Bb6 Bb7 13.Kf2 Be4 14.Ke1 (8.932.671.893) 15619

52/70  11:53  -2.93    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Kg3 Kb2
                       9.Kf2 Kc3 10.Kg3 Kc4 11.Kf2 Bb7
                       12.Kf1 Kd4 13.Kf2 Ke4 14.Bd8 (11.035.874.881) 15473

53/71  13:50  -2.93    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Kg3 Kb2
                       9.Kf2 Bc6 10.Ke1 Kb3 11.Kf2 Bd5
                       12.Ke1 Bb7 13.Kf2 Kc3 14.Kg3 (12.736.354.697) 15331

54/71  14:56  -2.93    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Kg3 Kb2
                       9.Kf2 Bc6 10.Ke1 Kb3 11.Kf2 Kc4
                       12.Ke1 Ba8 13.Kf2 Bd5 14.Ke1 (13.685.759.300) 15269

55/71  18:50  -2.93    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Kg3 Kb2
                       9.Kf2 Bc6 10.Kf1 Kc3 11.Kf2 Kb3
                       12.Kg3 Bd5 13.Kf2 Kb2 14.Bd8 (17.170.787.703) 15186

56/72  25:28  -2.93    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Kg3 Kb2
                       9.Kf2 Kb3 10.Kg3 Bc6 11.Kf2 Bb7
                       12.Kf1 Kc3 13.Kf2 Bd5 14.Ke3 (23.508.388.489) 15376

57/72  30:07  -2.93    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Kg3 Kb2
                       9.Kf2 Kb3 10.Kg3 Ka4 11.Kf2 Be4
                       12.Kf1 Ba8 13.Kf2 Bd5 14.Kf1 (27.663.159.818) 15308

58/72  35:15  -2.93    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Kg3 Kb2
                       9.Kf2 Kb3 10.Kg1 Ka4 11.Kf2 Bc6
                       12.Ke1 Ba8 13.Kf1 Be4 14.Kf2 (32.491.961.127) 15357

59/72  40:07  -2.93    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Kg3 Kb2
                       9.Kf2 Kb3 10.Kg1 Ka4 11.Kf1 Bb7
                       12.Kf2 Kb3 13.Ke3 Kc3 14.Kf2 (37.196.216.116) 15448

60/79  71:09  -3.01--  1.c6 Bxc6 (64.862.499.865) 15193

60/79  87:31  -3.01    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Ke1 Kb2
                       9.Bd8 Kc3 10.Ba5 Kc4 11.Kf1 Kb3
                       12.Kg1 Bc6 13.Kf2 Bb7 14.Ke1 (79.913.003.160) 15218

61/79  106:38 -3.01    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Ke1 Kb2
                       9.Kf1 Kb3 10.Kg1 Kc3 11.Kf1 Kb2
                       12.Kg1 Kb3 13.Kf2 Bb7 14.Kf1 (98.871.057.838) 15451

62/79  126:16 -3.01    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Ke1 Kb2
                       9.Kf1 Kb3 10.Kg1 Kc3 11.Kf1 Kb2
                       12.Kf2 Bb7 13.Kg1 Kc3 14.Kf1 (117.439.746.615) 15501

63/79  152:07 -3.01    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Bd5 8.Ke1 Kb2
                       9.Kf1 Kb3 10.Kg1 Kc3 11.Kf1 Bb7
                       12.Kf2 Kb3 13.Kf1 Kc4 14.Kf2 (142.916.974.854) 15657

64/79  163:10 -3.01    1.c6 Bxc6 2.Ke2 f3+ 3.Kf2 Kd3 4.Kg3 Kc4
                       5.Kf2 Kb3 6.Bd8 Kxa3 7.Ba5 Ba8 8.Kg3 Bd5
                       9.Kf2 Kb3 10.Kg3 Kc4 11.Kf2 Be4
                       12.Ke3 Bb7 13.Kd2 Bd5 14.Ke1 (153.359.924.410) 15664


best move: c5-c6 time: 167:38.203 min  n/s: 15.664.638  nodes: 157.619.629.226

It's reproducible I think, but this was the first run and sometimes it takes a bit longer to play 1. c6. The drawscores from Stockfish are 'lost' though :fat:
Parent - By MaLaoshi (*) [tw] Date 2016-11-01 04:03 Edited 2016-11-01 04:22
Well I've only hopped on the Stockfish bandwagon since SF DD or so, and
the versions I tried could solve this position by accident at best: sometimes
finding it, sometimes not; or finding it only to "forget" about the win on the
next iteration, reverting to a drawish score. Engines which are solid here are
Houdini 4 Tactical, and Komodo 8 with null-move pruning off (that is, I only
have the free one, but it's plausible that more recent Komodos can do it as
well with the same setting).

Hoping for a draw score after 1. c6 may be a bit too much since white will
give up 2~3 pawns, and there can still be a lot of pointless shuffling after
that. But if engines can see 35~40 ply ahead to the concrete win in all
other lines, they will play correctly regardless of this eval flaw.

By the way, your TalkChess post may be confusing, which is also reflected
in other people's reactions to it. You still talk about 1. c6 in the text, but
the diagram and FEN you give are from a position where white's c-pawn is
gone already.
Parent - By Fishpov (**) [fr] Date 2016-12-13 20:04
Deep Shredder 13 seems to be very strong for this king of position

New game
8/8/p4Bp1/1pPb2P1/1P2kp2/P7/5K2/8 w - - 0 1


Analysis by Deep Shredder 13 x64:

....
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Bd5-b7 4.Be5-c7 Kd3-c2 5.Bc7-a5 Kc2-b2 6.Kf2-g3 Kb2xa3 7.Kg3-f2 Ka3-b3 8.Kf2-e3 Kb3-a2 9.Ke3-f2 Bb7-c6
  =/+ (-0.61 ++)  Depth: 50/65   00:00:14  175MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Kd3-c2 4.Be5-c7 Kc2-b3 5.Kf2-e3 Bd5-c6 6.Bc7-a5 Kb3xa3 7.Ke3-f2 Ka3-b3 8.Kf2-e3 Kb3-c4 9.Ke3-f2 Kc4-d4 10.Ba5-d8 Kd4-e4 11.Bd8-c7 Ke4-f5 12.Bc7-d8 a6-a5 13.b4xa5 Kf5-e4 14.Bd8-f6 b5-b4 15.a5-a6 Ke4-d3 16.Kf2-g3 b4-b3 17.a6-a7 Kd3-c2 18.Bf6-d8 b3-b2 19.Bd8-a5 b2-b1Q 20.Kg3-f2 Bc6-b5 21.a7-a8Q Qb1-f1+ 22.Kf2-g3 Qf1-g1+ 23.Kg3-h4
  =/+ (-0.68 --)  Depth: 50/65   00:00:15  189MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Kd3-c2 4.Be5-c7 Kc2-b3 5.Kf2-e3 Bd5-c6 6.Bc7-a5 Kb3xa3 7.Ke3-f2 Ka3-b3 8.Kf2-e3 Kb3-c4 9.Ke3-f2 Kc4-d4 10.Ba5-d8 Kd4-e4 11.Bd8-c7 Ke4-f5 12.Bc7-d8 Bc6-e4 13.Bd8-f6 Kf5-f4 14.Bf6-e7 Be4-d5 15.Be7-f6 Bd5-c6 16.Bf6-e7 a6-a5 17.Be7-d6+ Kf4-f5 18.b4xa5 Kf5-e4 19.Bd6-e7 b5-b4 20.a5-a6 b4-b3 21.Be7-f6 Ke4-d3 22.Kf2-g3 Kd3-c2 23.Kg3-f2
  -/+ (-0.79 --)  Depth: 50/65   00:00:16  203MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Kd3-c2 4.Be5-c7 Kc2-b3 5.Kf2-e3 Bd5-c6 6.Bc7-a5 Kb3xa3 7.Ke3-f2 Ka3-b3 8.Kf2-e3 Kb3-c4 9.Ke3-f2 Kc4-d4 10.Ba5-d8 Kd4-e4 11.Bd8-c7 Ke4-f5 12.Bc7-d8 Kf5-f4 13.Bd8-e7 a6-a5 14.Be7-d6+ Kf4-f5 15.b4xa5 Kf5-e4 16.Bd6-e7 b5-b4 17.a5-a6 b4-b3 18.Be7-f6 Ke4-d3 19.a6-a7 Kd3-c2 20.Bf6-d8
  -/+ (-0.94 --)  Depth: 50/65   00:00:17  223MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Kd3-c2 4.Be5-c7 Kc2-b3 5.Kf2-e3 Bd5-c6 6.Bc7-a5 Kb3xa3 7.Ke3-f2 Ka3-b3 8.Kf2-e3 Kb3-c4 9.Ke3-f2 Kc4-d4 10.Ba5-d8 Kd4-e4 11.Bd8-c7 Ke4-f5 12.Bc7-d8 Kf5-f4 13.Bd8-e7 a6-a5 14.Be7-d6+ Kf4-f5 15.b4xa5 Kf5-e4 16.Bd6-e7 b5-b4 17.a5-a6 b4-b3 18.Be7-f6 Ke4-d3 19.Kf2-g3
  -/+ (-1.14 --)  Depth: 50/65   00:00:19  239MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Kd3-c2 4.Be5-c7 Kc2-b3 5.Kf2-e3 Bd5-c6 6.Bc7-a5 Kb3-c2 7.Ke3-f2 Bc6-b7 8.Kf2-f1 Bb7-a8 9.Kf1-e1 Kc2-b2 10.Ke1-d2 Kb2-b3 11.Kd2-e3 Kb3xa3 12.Ke3-f2 Ba8-c6 13.Kf2-e1 Ka3-b3 14.Ke1-f2 Kb3-c3 15.Kf2-g1 Bc6-d5 16.Kg1-f2 Kc3-d4 17.Ba5-c7 Kd4-e4 18.Bc7-h2 Bd5-c6 19.Kf2-g1 Ke4-e3 20.Bh2-g3
  -/+ (-1.41 --)  Depth: 50/65   00:00:20  254MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Kd3-c2 4.Be5-c7 Kc2-b3 5.Bc7-a5 Kb3xa3 6.Kf2-e3 Bd5-c6 7.Ke3-f2 Ka3-b3 8.Kf2-e3 Kb3-c4 9.Ke3-f2 Kc4-d3 10.Ba5-b6 Kd3-c3 11.Bb6-a5 Bc6-d5 12.Kf2-e3 Kc3-c4 13.Ke3-f2 Bd5-e4
  -/+ (-1.19 ++)  Depth: 50/65   00:00:21  265MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Kd3-c2 4.Be5-c7 Kc2-b3 5.Bc7-a5 Kb3xa3 6.Kf2-e3 Bd5-c6 7.Ke3-f2 Ka3-b3 8.Kf2-e3 Kb3-c2 9.Ke3-f2 Kc2-c3 10.Kf2-e3 Bc6-d5 11.Ke3-f2 Kc3-d3 12.Ba5-c7 Kd3-d4 13.Bc7-a5 Bd5-c6 14.Ba5-d8 Kd4-e4 15.Bd8-b6 Ke4-f5 16.Kf2-e3 Kf5xg5 17.Bb6-d8+ Kg5-f5 18.Bd8-c7 g6-g5 19.Bc7-g3 g5-g4 20.Ke3-d4 Kf5-e6 21.Bg3-e1 Bc6-b7 22.Be1-g3 Ke6-d7 23.Kd4-e5 Kd7-c6 24.Bg3-f2 Bb7-c8 25.Ke5-e4 Bc8-e6 26.Ke4-e5 Be6-d7 27.Ke5-e4 Bd7-c8
  -/+ (-1.33)  Depth: 50/65   00:00:22  281MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Kd3-c2 4.Be5-c7 Bd5-c6 5.Kf2-e1 Kc2-b2 6.Ke1-f1 Kb2xa3 7.Bc7-a5 Ka3-b2 8.Kf1-f2 Kb2-b3 9.Kf2-e3 Bc6-a8 10.Ke3-f2 Kb3-c4 11.Kf2-e3 Ba8-e4 12.Ke3-f2 Be4-d5 13.Kf2-e3 Bd5-c6 14.Ke3-f2 Kc4-d3 15.Ba5-b6 Kd3-e4 16.Bb6-a5 Ke4-f5 17.Kf2-e3 Kf5xg5 18.Ba5-d8+ Kg5-f5 19.Bd8-c7 g6-g5 20.Bc7-g3 g5-g4 21.Ke3-d4 Kf5-e6 22.Bg3-e1 Bc6-b7 23.Be1-g3 Ke6-d7 24.Kd4-e5 Kd7-c6 25.Bg3-f2 Bb7-c8 26.Ke5-e4 Bc8-e6 27.Ke4-e5 Be6-d7
  -/+ (-1.33)  Depth: 51/67   00:00:23  299MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Bd5-c6 4.Be5-c7 Bc6-a8 5.Bc7-e5 Kd3-c4 6.Kf2-e1 a6-a5 7.c5-c6 a5-a4 8.c6-c7 Ba8-b7 9.Ke1-f2 Kc4-b3 10.Be5-d6 Kb3xa3 11.Kf2-e3 Ka3-b2 12.Bd6-c5 a4-a3 13.Bc5-d4+ Kb2-b1 14.Bd4-f6
  -/+ (-1.41 --)  Depth: 52/67   00:00:25  328MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Bd5-c6 4.Be5-c7 Bc6-a8 5.Bc7-e5 Kd3-c4 6.Be5-d6 Kc4-b3 7.Bd6-c7 Kb3xa3 8.Bc7-a5 Ba8-e4 9.Kf2-f1 Ka3-b3 10.Kf1-e1 Be4-d5 11.Ke1-f2 Bd5-c6 12.Kf2-g3 Bc6-a8 13.Kg3-f2 Kb3-b2 14.Ba5-b6 Ba8-e4 15.Bb6-a5 Kb2-c3 16.Kf2-e3 Be4-a8 17.Ke3-f2 Ba8-b7 18.Kf2-e3 Bb7-e4 19.Ke3-f2 Be4-c6 20.Kf2-f1 Kc3-d3 21.Kf1-f2 Bc6-e4 22.Ba5-b6 Kd3-c4 23.Bb6-a5 Be4-b7 24.Kf2-g3 Kc4-c3 25.Kg3-f2 Bb7-d5 26.Kf2-f1 Bd5-c6 27.Kf1-f2 Kc3-d3
  -/+ (-1.41)  Depth: 52/67   00:00:27  353MN
1.Bf6-e7
  -/+ (-1.40 ++)  Depth: 52/67   00:00:27  354MN
1.Kf2-e2 f4-f3+ 2.Ke2-f2 Ke4-d3 3.Bf6-e5 Bd5-c6 4.Be5-c7 Bc6-a8 5.Bc7-e5 Kd3-c4 6.Be5-c7 Kc4-b3 7.Kf2-e3 Kb3xa3 8.Bc7-a5 Ka3-a4 9.Ke3-f2 Ka4-b3 10.Kf2-e3 Kb3-c3 11.Ke3-f2 Kc3-d3 12.Ba5-b6 Ba8-d5 13.Bb6-d8 Kd3-e4 14.Bd8-a5 Ke4-f5 15.Kf2-e3 Bd5-c6 16.Ba5-c7 Kf5-g4 17.Ke3-f2 Kg4xg5 18.Kf2-e3 Kg5-f5 19.Bc7-d6 Kf5-g4 20.Bd6-c7 a6-a5 21.b4xa5 b5-b4 22.Bc7-e5 Kg4-f5 23.Be5-b2 g6-g5 24.Ke3-f2 g5-g4 25.Bb2-c1 b4-b3 26.Kf2-g3 Kf5-e4 27.Bc1-b2 Ke4-d5 28.Bb2-a3 Kd5-d4
  -/+ (-1.41)  Depth: 53/78   00:00:32  411MN
1.Bf6-d8
  -/+ (-1.40 ++)  Depth: 53/78   00:00:32  412MN
1.Bf6-d8 f4-f3 2.Bd8-b6 Bd5-a8 3.Kf2-g3 Ba8-b7 4.Kg3-f2 Bb7-c6 5.Bb6-a5 Bc6-d5 6.Ba5-d8 Ke4-d4 7.Bd8-b6 Kd4-d3 8.Bb6-d8 Kd3-c3 9.Kf2-e3 Kc3-b2 10.Ke3-f2 Bd5-b7 11.Bd8-c7 Bb7-c6 12.Kf2-e3 Kb2xa3 13.Bc7-a5 Bc6-b7 14.Ke3-f2 Ka3-b3 15.Kf2-e3 Bb7-a8 16.Ke3-f2 Ba8-c6 17.Kf2-g3 Kb3-b2
  -/+ (-1.33 ++)  Depth: 53/78   00:00:33  417MN
1.Bf6-d8 f4-f3 2.Bd8-b6 Bd5-a8 3.Kf2-g3 Ba8-b7 4.Kg3-f2 Bb7-c6 5.Bb6-a5 Ke4-f4 6.Ba5-d8 Kf4-g4 7.Bd8-f6 Kg4-f5 8.Bf6-d8 Bc6-b7 9.Bd8-f6 Kf5-e4 10.Bf6-d8 Ke4-d4 11.Bd8-c7 Bb7-d5 12.Bc7-d8 Kd4-d3 13.Bd8-b6 Kd3-c4 14.Bb6-d8 Kc4-b3 15.Bd8-c7 Bd5-c6 16.Bc7-d8 Kb3xa3 17.Bd8-a5 Ka3-b3 18.Kf2-g3 Bc6-a8 19.Kg3-f2 Kb3-c4
  -/+ (-1.26 ++)  Depth: 53/78   00:00:33  420MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-d8 Kd4-c4 4.Kf2-e3 Bd5-c6 5.Bd8-c7 Bc6-b7 6.Bc7-d8 Kc4-b3 7.Ke3-f2 Kb3xa3 8.Bd8-a5 Ka3-b3 9.Kf2-e3 Bb7-a8 10.Ke3-f2 Ba8-c6 11.Kf2-g3 Kb3-c2 12.Kg3-f2 Kc2-d3 13.Ba5-d8 Bc6-a8 14.Bd8-b6 Ba8-d5 15.Bb6-d8 Kd3-e4 16.Bd8-a5 Ke4-f5 17.Kf2-e3 Bd5-c6 18.Ba5-c7 Kf5-g4 19.Ke3-f2 Kg4xg5 20.Kf2-e3 Bc6-b7 21.Bc7-d6 Kg5-f5 22.Bd6-g3 Bb7-c6 23.Bg3-c7 Kf5-e6 24.Bc7-b8
  -/+ (-1.33 --)  Depth: 53/78   00:00:33  423MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-d8 Kd4-c4 4.Bd8-a5 Kc4-d4 5.Ba5-c7 Bd5-b7 6.Bc7-d8 Bb7-e4 7.Bd8-f6+ Kd4-c4 8.Bf6-e7 Be4-a8 9.Be7-d8 Kc4-b3 10.Bd8-a5 Kb3-b2 11.Ba5-d8 Ba8-c6 12.Bd8-c7 Kb2-b3 13.Bc7-b6 Kb3-a4 14.Bb6-d8 Bc6-a8 15.Bd8-a5 Ba8-b7 16.Ba5-c7 Bb7-d5 17.Bc7-d8 Ka4xa3
  -/+ (-1.25 ++)  Depth: 53/78   00:00:34  431MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-b6 Bd5-c6 4.Bb6-d8 Kd4-d3 5.Bd8-c7 Kd3-c4 6.Bc7-d8 Kc4-b3 7.Bd8-a5 Kb3-c2 8.Ba5-d8 Kc2-b2 9.Bd8-f6+
  -/+ (-1.36 --)  Depth: 53/78   00:00:34  434MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-b6 Bd5-c6 4.Bb6-d8 Kd4-d3 5.Bd8-c7 Kd3-c4 6.Bc7-d8 Kc4-b3 7.Bd8-a5 Kb3-c2 8.Ba5-d8 Kc2-b2 9.Bd8-c7 Kb2xa3 10.Bc7-a5 Ka3-b3 11.Kf2-e1 Kb3-c4 12.Ke1-f2 Kc4-d4 13.Ba5-d8 Bc6-a8 14.Bd8-b6 Kd4-d3 15.Bb6-a5 Kd3-e4 16.Ba5-b6 Ke4-f4 17.Bb6-d8 Ba8-c6 18.Bd8-b6 Kf4xg5 19.Bb6-c7 Kg5-g4 20.Kf2-e3 Bc6-d5 21.Bc7-d6 Kg4-f5 22.Bd6-e7 a6-a5 23.b4xa5 Bd5-c6 24.Be7-d6 b5-b4 25.Bd6-f8 b4-b3 26.Bf8-g7 g6-g5 27.Bg7-c3 g5-g4 28.Ke3-f2
  -/+ (-1.41)  Depth: 53/78   00:00:34  439MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-b6 Bd5-c6 4.Bb6-d8 Kd4-d3 5.Bd8-c7 Kd3-c3 6.Bc7-a5 Kc3-b2 7.Ba5-c7 Kb2xa3 8.Bc7-a5 Ka3-b3 9.Kf2-e1 Kb3-c4 10.Ke1-f2 Bc6-d5 11.Kf2-e3 Kc4-c3 12.Ke3-f2 Kc3-d3 13.Ba5-d8 Kd3-e4 14.Bd8-c7 Ke4-f5 15.Bc7-d8 Kf5-f4 16.Bd8-c7+ Kf4xg5 17.Kf2-e3 Kg5-g4 18.Bc7-d6 Kg4-f5 19.Bd6-g3 Bd5-c6 20.Bg3-c7 Kf5-e6 21.Bc7-f4 Ke6-d5 22.Ke3-d3 Bc6-b7 23.Bf4-g5 Kd5-e5 24.Kd3-e3 Ke5-f5 25.Bg5-d8 Kf5-g4 26.Bd8-c7 Bb7-c6 27.Ke3-f2 Bc6-d5 28.Kf2-e3 Bd5-b7
  -/+ (-1.41)  Depth: 54/78   00:00:35  442MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-b6 Kd4-c4 4.c5-c6 Bd5xc6 5.Kf2-e1 Kc4-b3 6.Ke1-d2 Kb3xa3 7.Bb6-a5 Ka3-b3 8.Kd2-e3 Kb3-c3 9.Ke3-f2 Bc6-d5 10.Kf2-e3 Kc3-b3 11.Ke3-f2 Kb3-c2 12.Ba5-c7 Bd5-c6 13.Bc7-a5 Kc2-c3 14.Kf2-e3 Bc6-d5 15.Ke3-f2 Kc3-c4 16.Kf2-e3 Bd5-b7 17.Ke3-f2 Kc4-c3 18.Kf2-e3 Kc3-b3 19.Ke3-f2 Kb3-c4 20.Kf2-e3 Kc4-c3 21.Ke3-f2 Kc3-b3
  -/+ (-1.48 --)  Depth: 55/78   00:00:36  461MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-b6 Kd4-c4 4.Bb6-c7 Bd5-e4 5.Bc7-a5 Kc4-b3 6.Ba5-d8 Be4-c6 7.Bd8-a5 Kb3xa3 8.Kf2-f1 Ka3-b3 9.Kf1-f2 Kb3-c3 10.Kf2-e3 Bc6-a8 11.Ke3-f2 Kc3-d3 12.Ba5-c7 Ba8-c6 13.Bc7-a5 Kd3-e4 14.Ba5-d8 Ke4-f4 15.Bd8-f6 a6-a5 16.b4xa5 b5-b4 17.Bf6-b2 Kf4-e4 18.Bb2-c1 Ke4-d3 19.a5-a6
  -/+ (-1.55 --)  Depth: 55/78   00:00:38  491MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-b6 Kd4-c4 4.Bb6-c7 Bd5-e4 5.Bc7-a5 Kc4-b3 6.Ba5-d8 Be4-c6 7.Bd8-a5 Kb3xa3 8.Kf2-f1 Ka3-b3 9.Kf1-f2 Kb3-c4 10.Kf2-e3 Kc4-c3 11.Ke3-f2 Kc3-d4 12.Ba5-c7 Kd4-e4 13.Bc7-a5 Ke4-f5 14.Ba5-d8 Kf5-f4 15.Bd8-f6 a6-a5 16.b4xa5 b5-b4 17.Bf6-b2 Kf4-e4 18.Bb2-c1 Ke4-d3 19.Kf2-g3 b4-b3 20.Bc1-b2
  -+ (-1.65 --)  Depth: 55/78   00:00:40  518MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-b6 Kd4-c4 4.Bb6-c7 Bd5-e4 5.Bc7-a5 Kc4-b3 6.c5-c6 Be4xc6 7.Ba5-d8 Kb3xa3 8.Bd8-a5 Ka3-b3 9.Kf2-e3 Kb3-c4 10.Ke3-f2 Kc4-d3 11.Ba5-d8 Kd3-e4 12.Kf2-e1 Ke4-f5 13.Bd8-f6 Kf5-f4 14.Bf6-e7 Kf4-e3 15.Be7-c5+ Ke3-e4 16.Bc5-e7 Ke4-f4 17.Be7-d8 Bc6-d5 18.Ke1-f2 a6-a5 19.Bd8-c7+ Kf4-f5 20.Bc7xa5 Kf5xg5 21.Ba5-c7 Kg5-f5 22.Kf2-g3 g6-g5 23.Bc7-d8 g5-g4 24.Bd8-c7 Kf5-e4 25.Bc7-b6 Bd5-e6 26.Bb6-c5 Ke4-d3 27.Bc5-e7 Kd3-e3 28.Be7-d6
  -+ (-1.80 --)  Depth: 55/78   00:00:42  541MN
1.Bf6-d8 f4-f3 2.Bd8-c7 Ke4-d4 3.Bc7-b6 Kd4-c4 4.Bb6-c7 Bd5-e4 5.Bc7-a5 Kc4-b3 6.Ba5-c7 Kb3xa3 7.Bc7-a5 Be4-b7 8.Kf2-e3 Bb7-c6 9.Ke3-d2 Ka3-b2 10.Kd2-d3 Bc6-e4+ 11.Kd3-d2 Kb2-b3 12.Kd2-e3 Kb3-c3 13.c5-c6 Be4xc6 14.Ke3-f2 Kc3-d4 15.Ba5-b6+ Kd4-e4 16.Kf2-g3 Ke4-f5 17.Bb6-d8 Bc6-d5 18.Bd8-e7 Kf5-e4 19.Kg3-f2 Ke4-d3 20.Be7-d8 Kd3-c3 21.Bd8-a5 Bd5-c6 22.Kf2-e3 Kc3-c2 23.Ba5-c7 Kc2-b2 24.Bc7-a5 Kb2-b3 25.Ke3-f2 Bc6-d5 26.Kf2-e3 Kb3-a3 27.Ke3-f2 Ka3-a4 28.Kf2-e3 Ka4-b3 29.Ke3-f2 Kb3-c3
  -+ (-1.80)  Depth: 55/78   00:00:44  565MN
1.Bf6-d8 Bd5-c6 2.Kf2-e2 f4-f3+ 3.Ke2-f2 Ke4-d3 4.Bd8-c7 Kd3-c4 5.Kf2-e3 Kc4-b3 6.Ke3-d2 Kb3xa3 7.Bc7-a5 Ka3-b2 8.Ba5-c7 Kb2-b3 9.Bc7-a5 Kb3-c4 10.Kd2-e3 Kc4-c3 11.Ke3-f2 Kc3-c2 12.Ba5-b6 Kc2-d3 13.Bb6-d8 Kd3-e4 14.Bd8-c7 Ke4-f5 15.Kf2-e3 Kf5xg5 16.Bc7-e5 Kg5-g4 17.Be5-d6 a6-a5 18.b4xa5 b5-b4 19.a5-a6 Kg4-f5 20.Bd6-f8 b4-b3 21.Bf8-g7 g6-g5 22.a6-a7 g5-g4 23.Ke3-f2 Kf5-e6 24.Bg7-b2 Ke6-d5 25.Kf2-g3 Kd5xc5 26.Bb2-c1 Kc5-c4 27.Bc1-a3
  -+ (-1.87 --)  Depth: 56/78   00:00:52  668MN
1.c5-c6
  -+ (-1.87 ++)  Depth: 56/78   00:00:56  705MN
1.c5-c6 Bd5xc6 2.Kf2-e2 f4-f3+ 3.Ke2-f2 Bc6-b7 4.Bf6-c3 Bb7-a8 5.Bc3-e1 Ke4-d3 6.Kf2-g3 Ba8-c6 7.Be1-f2 Kd3-c3 8.Bf2-c5 Kc3-c4 9.Bc5-b6 Bc6-d5 10.Bb6-a5 Kc4-c3 11.Kg3-f2 Kc3-b2 12.Kf2-e3 Kb2xa3 13.Ke3-f2 Ka3-b3 14.Kf2-e3 Bd5-c6 15.Ke3-f2 Bc6-b7
  -+ (-1.73 ++)  Depth: 56/78   00:00:57  722MN
1.c5-c6 Bd5xc6 2.Kf2-e2 f4-f3+ 3.Ke2-f2 Bc6-b7 4.Bf6-c3 Bb7-a8 5.Bc3-e1 Ke4-d3 6.Kf2-g3 Ba8-c6 7.Be1-f2 Kd3-c3 8.Bf2-c5 Kc3-b3 9.Bc5-b6 Kb3xa3 10.Bb6-a5 Ka3-b3 11.Kg3-f2 Kb3-c4 12.Kf2-e3 Bc6-b7
  -+ (-1.66 ++)  Depth: 56/78   00:00:57  727MN
1.c5-c6 Bd5xc6 2.Kf2-e2 f4-f3+ 3.Ke2-f2 Bc6-b7 4.Bf6-c3 Bb7-a8 5.Bc3-e1 Ke4-d3 6.Kf2-g3 Ba8-c6 7.Be1-f2 Kd3-c3 8.Bf2-c5 Kc3-b3 9.Bc5-b6 Kb3-c4 10.Kg3-f2 Bc6-d5 11.Kf2-e3 Kc4-c3 12.Bb6-c7 Kc3-b2 13.Bc7-a5 Bd5-c6 14.Ke3-f2 Kb2-b3 15.Ba5-b6 Kb3-c2 16.Kf2-e3 Bc6-d5 17.Bb6-c7 Kc2-c3 18.Ke3-f2 Kc3-b3 19.Kf2-e3 Kb3xa3 20.Bc7-a5 Ka3-b3 21.Ke3-f2 Kb3-c3 22.Kf2-e3 Kc3-c4 23.Ke3-f2 Kc4-d4 24.Ba5-d8 Kd4-e4 25.Bd8-c7 Ke4-f5 26.Bc7-d8 a6-a5 27.Bd8xa5 Kf5xg5 28.Ba5-d8+ Kg5-f4 29.Bd8-c7+ Kf4-f5 30.Bc7-d6 g6-g5 31.Kf2-e3
  -+ (-1.73 --)  Depth: 56/78   00:00:58  735MN
1.c5-c6 Bd5xc6 2.Kf2-e2 f4-f3+ 3.Ke2-f2 Bc6-b7 4.Bf6-c3 Ke4-d3 5.Bc3-e5 Bb7-c6 6.Be5-c7 Kd3-c4 7.Kf2-e3 Bc6-b7 8.Bc7-a5 Kc4-c3 9.Ke3-f2 Kc3-b3 10.Kf2-e3 Bb7-d5 11.Ke3-f2 Bd5-c6 12.Ba5-b6 Kb3-c4 13.Kf2-f1 Kc4-c3 14.Kf1-f2 Kc3-b3 15.Kf2-g3 Kb3-c4 16.Bb6-a5 Bc6-b7 17.Kg3-f2 Bb7-d5 18.Kf2-g3 Kc4-c3 19.Ba5-b6 Bd5-e4 20.Kg3-f2 Kc3-b3 21.Kf2-e3 Be4-d5 22.Ke3-f2 Kb3-b2 23.Bb6-c7 Kb2xa3 24.Bc7-a5 Ka3-a2 25.Ba5-b6 Ka2-b3 26.Bb6-a5 Kb3-c3 27.Kf2-e3 Kc3-c4 28.Ke3-f2 Bd5-c6 29.Kf2-e3 Bc6-e4 30.Ke3-f2 Kc4-d3
  -+ (-1.67)  Depth: 56/78   00:01:03  810MN
1.c5-c6 Bd5xc6 2.Kf2-e2 f4-f3+ 3.Ke2-f2 Bc6-d5 4.Bf6-c3 Ke4-d3 5.Bc3-g7 Kd3-c2 6.Bg7-e5 Kc2-b3 7.Be5-c7 Bd5-c6 8.Kf2-e3 Kb3xa3 9.Bc7-a5 Ka3-b2 10.Ke3-f2 Bc6-e4 11.Kf2-g3 Kb2-b3 12.Kg3-f2 Kb3-c3 13.Kf2-g3 Kc3-d4 14.Kg3-f2 Be4-b7 15.Ba5-d8 Kd4-e4 16.Bd8-a5 Ke4-f4 17.Ba5-d8 a6-a5 18.Bd8xa5 Kf4xg5 19.Ba5-d8+ Kg5-f5 20.Bd8-c7 g6-g5 21.Kf2-e3 Bb7-c6 22.Bc7-g3 Kf5-g4 23.Ke3-f2 Kg4-h3 24.Bg3-d6 Bc6-d5 25.Bd6-c7 Bd5-e4 26.Bc7-g3 Kh3-g4 27.Bg3-d6 Be4-d5 28.Kf2-e3 Bd5-c6 29.Bd6-c7 Kg4-h3 30.Ke3-f2 g5-g4 31.Bc7-e5 Bc6-b7
  -+ (-1.73)  Depth: 57/78   00:01:05  840MN
1.c5-c6 Bd5xc6 2.Kf2-e2 f4-f3+ 3.Ke2-f2 Bc6-d5 4.Bf6-e7 Ke4-d3 5.Be7-d6 Kd3-c4 6.Bd6-c7 Kc4-b3 7.Bc7-a5 Kb3xa3 8.Kf2-e3 Bd5-c6 9.Ke3-f2 Ka3-b2 10.Ba5-b6 Kb2-b3 11.Bb6-a5 Kb3-c2 12.Kf2-e3 Kc2-c3 13.Ke3-f2 Kc3-c4 14.Kf2-e3 Bc6-e4 15.Ke3-f2 Kc4-d4 16.Ba5-d8 Be4-b7 17.Bd8-a5 Kd4-e4 18.Ba5-d8 Ke4-f5 19.Bd8-e7 Kf5-f4 20.Be7-d8 a6-a5 21.Bd8xa5 Kf4xg5 22.Ba5-d8+ Kg5-f4 23.Bd8-c7+ Kf4-f5 24.Kf2-e3 Bb7-c6 25.Bc7-g3 Kf5-g4 26.Ke3-f2 Bc6-b7 27.Bg3-c7 Bb7-d5 28.Bc7-d8 Kg4-f5 29.Bd8-c7 g6-g5 30.Kf2-e3 Bd5-a8 31.Bc7-g3 Kf5-g4 32.Ke3-f2
  -+ (-1.73)  Depth: 58/78   00:01:06  861MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Ke4-d3 3.Bc3-e5 f4-f3 4.Be5-f6 Bc6-b7 5.Bf6-e7 Kd3-c4 6.Be7-f6 Bb7-e4 7.Bf6-d8 Kc4-b3 8.Kf2-e3 Kb3xa3 9.Bd8-a5 Ka3-b3 10.Ke3-f2 Be4-c6 11.Kf2-e3 Kb3-c3 12.Ke3-f2 Kc3-d4 13.Ba5-b6+ Kd4-d3 14.Bb6-a5 Kd3-e4 15.Ba5-b6 Ke4-f4 16.Bb6-d8 a6-a5 17.Bd8xa5 Kf4xg5 18.Ba5-c7 Kg5-f5 19.Kf2-e3 g6-g5 20.Bc7-g3 Kf5-g4 21.Bg3-d6 Kg4-h3 22.Ke3-f2 Bc6-e4 23.Bd6-c7 g5-g4 24.Bc7-d6 Be4-d5 25.Bd6-e5 Bd5-c4 26.Be5-d6 Bc4-e6 27.Bd6-c7 Be6-f5 28.Bc7-e5 Bf5-d7 29.Be5-c7 Bd7-e6 30.Bc7-g3 Be6-c4 31.Bg3-e5 Bc4-f7
  -+ (-1.66 ++)  Depth: 59/78   00:01:08  895MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Ke4-d3 3.Bc3-e5 f4-f3 4.Be5-f6 Bc6-a8 5.Bf6-d8 Kd3-c2 6.Bd8-f6 Kc2-b3 7.Bf6-d8 Kb3xa3 8.Bd8-a5 Ka3-b3 9.Kf2-g3 Ba8-d5 10.Kg3-f2 Bd5-c6 11.Kf2-e3 Kb3-c3 12.Ke3-f2 Kc3-d4 13.Ba5-b6+ Kd4-d3 14.Bb6-a5 Kd3-e4 15.Ba5-b6 Ke4-f4 16.Bb6-d8 a6-a5 17.Bd8xa5 Kf4xg5 18.Ba5-c7 Kg5-f5 19.Kf2-e3 g6-g5 20.Bc7-g3 Kf5-g4 21.Bg3-d6 Kg4-h3 22.Ke3-f2 Bc6-e4 23.Bd6-c7 g5-g4 24.Bc7-d6 Be4-d5 25.Bd6-e5 Bd5-c4 26.Be5-d6 Bc4-e6 27.Bd6-c7 Be6-f5 28.Bc7-e5 Bf5-g6 29.Be5-d6 Bg6-e4 30.Bd6-c7 Be4-b7 31.Bc7-d6 Bb7-c6 32.Bd6-c7 Bc6-d7 33.Bc7-d6
  -+ (-1.66)  Depth: 59/78   00:01:08  904MN
1.Bf6-c3
  -+ (-1.65 ++)  Depth: 59/78   00:01:14  976MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Ke4-d3 3.Bc3-e5 f4-f3 4.Be5-c7 Kd3-c2 5.Bc7-a5 Kc2-b2 6.Ba5-b6 Kb2xa3 7.Bb6-a5 Ka3-b3 8.Kf2-e3 Kb3-c3 9.Ke3-f2 Kc3-d4 10.Ba5-b6+ Kd4-d3 11.Bb6-a5 Kd3-e4 12.Ba5-b6 Ke4-f4 13.Bb6-d8 a6-a5 14.Bd8xa5 Kf4xg5 15.Ba5-c7 Kg5-f5 16.Kf2-e3 g6-g5 17.Bc7-g3 Kf5-g4 18.Bg3-e5 Bc6-d5 19.Be5-c7 Kg4-h3 20.Ke3-f2 Bd5-b7 21.Bc7-d6 Bb7-e4 22.Bd6-c7 g5-g4 23.Bc7-d6 Be4-d5 24.Bd6-e5 Bd5-c4 25.Be5-d6 Bc4-e6 26.Bd6-c7 Be6-f5 27.Bc7-e5 Bf5-g6 28.Be5-c7 Bg6-e8 29.Bc7-d6 Be8-c6 30.Bd6-c7 Bc6-d7 31.Bc7-e5 Bd7-c8 32.Be5-d6
  -+ (-1.71)  Depth: 60/78   00:01:16  1001MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Ke4-d3 3.Bc3-e5 f4-f3 4.Be5-c7 Kd3-c2 5.Bc7-a5 Kc2-b2 6.Ba5-b6 Kb2xa3 7.Bb6-a5 Ka3-b3 8.Kf2-e3 Kb3-c3 9.Ke3-f2 Kc3-d4 10.Ba5-b6+ Kd4-d3 11.Bb6-a5 Kd3-e4 12.Ba5-b6 Ke4-f4 13.Bb6-d8 a6-a5 14.Bd8xa5 Kf4xg5 15.Ba5-c7 Kg5-f5 16.Kf2-e3 g6-g5 17.Bc7-g3 Kf5-g4 18.Bg3-e5 Bc6-d5 19.Be5-c7 Kg4-h3 20.Ke3-f2 Bd5-b7 21.Bc7-d6 Bb7-e4 22.Bd6-c7 g5-g4 23.Bc7-d6 Be4-d5 24.Bd6-e5 Bd5-c4 25.Be5-d6 Bc4-e6 26.Bd6-c7 Be6-f5 27.Bc7-e5 Bf5-g6 28.Be5-c7 Bg6-e8 29.Bc7-d6 Be8-c6 30.Bd6-c7 Bc6-d7 31.Bc7-e5 Bd7-f5 32.Be5-c7 Bf5-e6 33.Bc7-d6 Be6-c8 34.Bd6-e5
  -+ (-1.71)  Depth: 61/78   00:01:18  1029MN
1.Bf6-c3
  -+ (-1.70 ++)  Depth: 61/78   00:01:23  1088MN
1.c5-c6 Bd5xc6 2.Bf6-c3 f4-f3 3.Bc3-f6 Ke4-d3 4.Bf6-e5 Kd3-c2 5.Be5-f6 Kc2-b3 6.Bf6-d8 Kb3xa3 7.Bd8-a5 Ka3-b3 8.Kf2-e3 Kb3-c4 9.Ke3-f2 Kc4-c3 10.Kf2-e3 Bc6-a8 11.Ke3-f2 Kc3-d4 12.Ba5-c7 Ba8-b7 13.Bc7-d8 Kd4-d3 14.Bd8-c7 Kd3-e4 15.Bc7-b6 Ke4-f5 16.Bb6-d8 Bb7-c6 17.Bd8-e7 Bc6-d5 18.Be7-d8 a6-a5 19.Bd8xa5 Kf5xg5 20.Ba5-b6 Bd5-c6 21.Kf2-e3 Kg5-f5 22.Bb6-c7 Kf5-g4 23.Ke3-f2 g6-g5 24.Bc7-d6 Kg4-h3 25.Kf2-f1 Bc6-d5 26.Kf1-f2 g5-g4 27.Bd6-e5 Bd5-c4 28.Be5-d6 Bc4-f7 29.Bd6-f4 Bf7-g6 30.Bf4-c7 Bg6-e8 31.Bc7-d6 Be8-c6 32.Bd6-f4
  -+ (-1.76)  Depth: 62/78   00:01:30  1180MN
1.c5-c6 Bd5xc6 2.Bf6-c3 f4-f3 3.Bc3-f6 Bc6-d5 4.Bf6-d8 Ke4-d4 5.Bd8-a5 Kd4-c3 6.Kf2-f1 Kc3-b3 7.Ba5-b6
  -+ (-1.69 ++)  Depth: 63/78   00:01:44  1369MN
1.c5-c6 Bd5xc6 2.Bf6-c3 f4-f3 3.Bc3-f6 Ke4-f4 4.Bf6-d8 Kf4-g4 5.Kf2-g1 Bc6-b7 6.Kg1-f2 Bb7-d5 7.Bd8-f6 Bd5-c6 8.Kf2-g1 Kg4-g3 9.Bf6-e5+ Kg3-h3 10.Be5-f6 f3-f2+
  -+ (-1.62 ++)  Depth: 63/78   00:01:46  1406MN
1.c5-c6 Bd5xc6 2.Bf6-c3 f4-f3 3.Bc3-d2 Ke4-d3 4.Bd2-c1 Kd3-c2 5.Bc1-e3 Kc2-b3 6.Be3-b6 Kb3-b2 7.Kf2-g1 Kb2xa3 8.Bb6-a5 Bc6-d5 9.Kg1-f2 Ka3-b3 10.Kf2-e3 Kb3-c4 11.Ke3-f2 Kc4-c3 12.Kf2-e3 Bd5-c6 13.Ke3-f2 Kc3-d3 14.Ba5-d8 Kd3-e4 15.Bd8-c7 Ke4-f5 16.Bc7-d8 Kf5-f4 17.Bd8-e7 Bc6-a8 18.Be7-d8 Ba8-b7 19.Bd8-e7 Bb7-c6 20.Be7-d8 a6-a5 21.Bd8xa5 Kf4xg5 22.Ba5-c7 Kg5-f5 23.Kf2-e3 g6-g5 24.Bc7-g3 Bc6-d5 25.Ke3-d4 Bd5-c4 26.Kd4-e3 Kf5-g4 27.Bg3-d6 Bc4-d5 28.Ke3-f2 Kg4-h3 29.Bd6-g3 g5-g4
  -+ (-1.69 --)  Depth: 63/78   00:01:47  1431MN
1.Bf6-g7
  -+ (-1.68 ++)  Depth: 63/78   00:01:57  1565MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Bc6-d5 3.Bc3-f6 f4-f3 4.Bf6-c3 Ke4-d3 5.Bc3-f6 Kd3-c4 6.Bf6-e5 Kc4-b3 7.Be5-c7 Bd5-c6 8.Bc7-a5 Kb3xa3 9.Kf2-e3 Ka3-b2 10.Ke3-f2 Kb2-c3 11.Kf2-e3 Kc3-c4 12.Ke3-f2 Kc4-d3 13.Ba5-d8 Kd3-e4 14.Bd8-c7 Ke4-f5 15.Bc7-d8 Kf5-f4 16.Bd8-e7 Bc6-a8 17.Be7-d8 Ba8-b7 18.Bd8-e7 Bb7-c6 19.Be7-d8 a6-a5 20.Bd8xa5 Kf4xg5 21.Ba5-c7 Kg5-f5 22.Kf2-e3 g6-g5 23.Bc7-g3 Bc6-d5 24.Bg3-d6 Kf5-g4 25.Ke3-f2 Kg4-h3 26.Bd6-g3 g5-g4 27.Bg3-e5 Bd5-e6 28.Be5-c7 Be6-c8 29.Bc7-d6 Bc8-d7 30.Bd6-g3 Bd7-e8 31.Bg3-c7 Be8-g6 32.Bc7-f4 Bg6-d3 33.Bf4-e5
  -+ (-1.69)  Depth: 63/78   00:02:05  1657MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Bc6-d5 3.Bc3-f6 f4-f3 4.Bf6-b2 Ke4-d3 5.Bb2-f6 Kd3-c2 6.Bf6-e7 Kc2-b2 7.Be7-d8 Kb2xa3 8.Bd8-a5 Bd5-a8 9.Kf2-g3 Ba8-c6 10.Kg3-f2 Ka3-b2 11.Kf2-e3 Kb2-c3 12.Ke3-f2 Kc3-d3 13.Ba5-d8 Kd3-e4 14.Bd8-c7 Ke4-f5 15.Bc7-d8 Kf5-f4 16.Bd8-e7 Bc6-a8 17.Be7-d8 Ba8-b7 18.Bd8-e7 Bb7-c6 19.Be7-d8 a6-a5 20.Bd8xa5 Kf4xg5 21.Ba5-c7 Kg5-f5 22.Kf2-e3 Bc6-d5 23.Bc7-d6 g6-g5 24.Bd6-c7 Kf5-g4 25.Ke3-f2 Bd5-a8 26.Bc7-d6 Kg4-h3 27.Bd6-g3 g5-g4 28.Bg3-d6 Ba8-c6 29.Bd6-f4 Bc6-d5 30.Bf4-c7 Bd5-e6 31.Bc7-g3 Be6-c8 32.Bg3-f4 Bc8-b7 33.Bf4-e5
  -+ (-1.69)  Depth: 64/78   00:02:08  1695MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Bc6-d5 3.Bc3-f6 f4-f3 4.Bf6-b2 Ke4-d3 5.Bb2-f6 Kd3-c2 6.Bf6-e7 Kc2-b2 7.Be7-d8 Kb2xa3 8.Bd8-a5 Bd5-a8 9.Kf2-g3 Ba8-c6 10.Kg3-f2 Ka3-b2 11.Kf2-e3 Kb2-c3 12.Ke3-f2 Kc3-d3 13.Ba5-d8 Kd3-e4 14.Bd8-c7 Ke4-f5 15.Bc7-d8 Kf5-f4 16.Bd8-e7 Bc6-a8 17.Be7-d8 Ba8-b7 18.Bd8-e7 Bb7-c6 19.Be7-d8 a6-a5 20.Bd8xa5 Kf4xg5 21.Ba5-c7 Kg5-f5 22.Kf2-e3 Bc6-d5 23.Bc7-d6 g6-g5 24.Bd6-c7 Kf5-g4 25.Ke3-f2 Bd5-a8 26.Bc7-d6 Kg4-h3 27.Bd6-g3 g5-g4 28.Bg3-d6 Ba8-c6 29.Bd6-f4 Bc6-d5 30.Bf4-c7 Bd5-e6 31.Bc7-g3 Be6-c8 32.Bg3-f4 Bc8-f5 33.Bf4-b8 Bf5-g6 34.Bb8-f4 Bg6-d3 35.Bf4-c7
  -+ (-1.69)  Depth: 65/78   00:02:21  1832MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Bc6-d5 3.Bc3-f6 f4-f3 4.Bf6-b2 Ke4-d3 5.Bb2-f6 Kd3-c2 6.Bf6-e7 Kc2-b2 7.Be7-d8 Kb2xa3 8.Bd8-a5 Bd5-a8 9.Kf2-g3 Ba8-c6 10.Kg3-f2 Ka3-b2 11.Kf2-e3 Kb2-c3 12.Ke3-f2 Kc3-d3 13.Ba5-d8 Kd3-e4 14.Bd8-c7 Ke4-f5 15.Bc7-d8 Kf5-f4 16.Bd8-e7 Bc6-a8 17.Be7-d8 Ba8-b7 18.Bd8-e7 Bb7-c6 19.Be7-d8 a6-a5 20.Bd8xa5 Kf4xg5 21.Ba5-c7 Kg5-f5 22.Kf2-e3 Bc6-d5 23.Bc7-d6 Kf5-g4 24.Ke3-f2 Kg4-h3 25.Bd6-f4 Bd5-b7 26.Bf4-c7 Bb7-e4 27.Bc7-d8 Be4-c6 28.Bd8-b6 Kh3-g4 29.Bb6-c7 Bc6-e4 30.Bc7-b6 Kg4-f4 31.Bb6-c7+ Kf4-f5 32.Kf2-e3 Be4-b7 33.Bc7-d6 Bb7-d5 34.Bd6-g3 Kf5-g4 35.Bg3-c7 Bd5-b7 36.Bc7-d6 Kg4-f5 37.Bd6-g3 Kf5-g4
  -+ (-1.69)  Depth: 66/78   00:02:33  1974MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Bc6-d5 3.Bc3-b2 Bd5-b7 4.Bb2-f6 Bb7-a8
  -+ (-1.62 ++)  Depth: 67/78   00:02:46  2145MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Bc6-d5 3.Bc3-b2 Bd5-b7 4.Bb2-f6 Ke4-d3 5.Bf6-e5 f4-f3 6.Be5-g3 Kd3-c4 7.Bg3-c7 Kc4-b3 8.Kf2-e3 Kb3xa3 9.Bc7-a5 Bb7-a8 10.Ke3-f2 Ba8-e4 11.Kf2-e3 Ka3-b3 12.Ke3-d2 Kb3-c4 13.Kd2-e1 Be4-c6 14.Ke1-f2 Kc4-d3 15.Ba5-b6 Kd3-e4 16.Bb6-c7 Ke4-f5 17.Bc7-d8 a6-a5 18.Bd8xa5 Kf5xg5 19.Kf2-e3 Kg5-g4 20.Ba5-c7 Kg4-h3 21.Ke3-f2 g6-g5 22.Bc7-g3 g5-g4 23.Bg3-e5 Bc6-d5 24.Be5-c7 Bd5-e6 25.Bc7-g3 Be6-c8 26.Bg3-f4 Bc8-f5 27.Bf4-e5 Bf5-d3 28.Be5-d6 Bd3-e4 29.Bd6-e5 Be4-b7 30.Be5-d6 Bb7-a8 31.Bd6-e5 Kh3-h4 32.Be5-d6 Ba8-d5 33.Bd6-e5 Bd5-c6 34.Be5-c7
  -+ (-1.69)  Depth: 67/78   00:02:48  2179MN
1.c5-c6 Bd5xc6 2.Bf6-c3 Bc6-d5 3.Bc3-b2 Bd5-b7 4.Kf2-e2 f4-f3+ 5.Ke2-f2 Ke4-d3 6.Kf2-e1 Bb7-a8 7.Ke1-f2 Ba8-d5 8.Kf2-e1 Kd3-c2 9.Bb2-e5 Kc2-b3 10.Be5-c7 Kb3xa3 11.Bc7-a5 Bd5-c6 12.Ke1-f2 Ka3-b3 13.Kf2-e3 Kb3-c4 14.Ke3-f2 Kc4-d3 15.Ba5-c7 Kd3-e4 16.Bc7-a5 Bc6-b7 17.Ba5-d8 Ke4-f4 18.Bd8-e7 Kf4-g4 19.Be7-d8 a6-a5 20.Bd8xa5 Kg4xg5 21.Ba5-c7 Kg5-f5 22.Kf2-e3 Bb7-c6 23.Bc7-a5 g6-g5 24.Ba5-c7 Kf5-g4 25.Ke3-f2 Kg4-h3 26.Bc7-d6 g5-g4 27.Bd6-e5 Bc6-e4 28.Be5-f4 Be4-c2 29.Bf4-c7 Bc2-b3 30.Bc7-e5 Kh3-h4
  -+ (-1.62 ++)  Depth: 68/86   00:03:11  2495MN
Up Topic The Rybka Lounge / Test Positions / Zugzwang matters in light-piece endgames--problem with SF

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