Odd Stockfish output?

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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Odd Stockfish output?

Post by zullil »

The output from Stockfish-2.2.2 shown below seems odd to me. In particular, it appears that the engine has completed the depth 39 iteration and started the depth 40 iteration, but has only returned a lowerbound score for depth 39.

I don't recall seeing this behavior before, though it may be perfectly normal. In addition, I'm not seeing any further output from the engine, though it is still running. Anybody know what's going on here?

[D]8/8/8/8/4n3/K1P5/P1P5/Bk6 w - - 0 1

Code: Select all

info depth 38 seldepth 80 score cp 1127 nodes 727261033 nps 6888507 time 105576 multipv 1 pv a1b2 e4d6 c3c4 d6c4 a3b4 c4d6 b4b3 d6b7 c2c4 b7a5 b3b4 a5c4 a2a4 c4d6 b4c5 d6c8 b2e5 b1c2 a4a5 c2b3 a5a6 b3a4 c5c6 c8a7 c6b6 a7b5 e5f4 a4b4 f4e3 b4c4 e3c5 b5c3 a6a7 c3a4 b6c6 a4c5 a7a8q c5d3 a8a7 d3b4 c6d6 c4c3 a7c5 c3b3 c5c8 b4a2 c8b7 b3c2 b7g2 c2b3 g2f3 a2c3 d6c5 b3b2 f3g2 b2b3 g2g4 b3b2 g4d4 b2b3 d4g4
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1135 lowerbound nodes 730647577 nps 6862667 time 106467 multipv 1 pv a1b2 e4d6 c3c4 d6c4 a3b4 c4d6 b4b3 d6b7 c2c4 b7a5 b3b4 a5c4 a2a4 c4d6 b4c5 d6c8 b2e5 b1c2 a4a5 c2b3 a5a6 b3a4 c5c6 c8a7 c6b6 a7b5 e5f4 a4b4 f4e3 b4c4 e3c5 b5c3 a6a7 c3a4 b6c6 a4c5 a7a8q c5d3 a8g8 c4d4 g8h8 d4e4 c6d6 d3f4 h8e8 e4f3 e8e7 f3g4 e7g7 g4f5 g7f8 f5e4 f8e8
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1143 lowerbound nodes 734486614 nps 6831289 time 107518 multipv 1 pv a1b2 b1c2 c3c4 c2d3 a3b4 e4d6 c4c5 d6c8 c5c6 d3e4 b4c5 e4f5 a2a4 f5e6 a4a5 c8d6 a5a6 d6f7 a6a7 f7g5 a7a8q e6f5 c6c7 g5e6 c5b6
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1155 lowerbound nodes 738135436 nps 6808676 time 108411 multipv 1 pv a1b2 e4d2 c3c4 d2c4 a3b4 c4b2 b4b3 b1c1 a2a3 c1b1 c2c4 b2d3 a3a4 d3e5 b3b4 b1c2 a4a5 c2d3 b4c5 e5c4 a5a6 c4d2 a6a7 d2e4 c5d5 e4f6 d5c6 f6e4 a7a8q d3d4 a8a4 d4d3 a4a3 d3c4 a3a6 c4c3 a6a5 c3d4 a5a4
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1173 lowerbound nodes 742466904 nps 6780643 time 109498 multipv 1 pv a1b2 e4d2 c3c4 d2c4 a3b4 c4b2 b4b3 b1c1 a2a3 c1b1 c2c4 b2d3 a3a4 d3e5 b3b4 b1c2 a4a5 c2d3 b4c5 e5c4 a5a6 c4d2 a6a7 d2e4 c5d5 e4f6 d5c6 f6e4 a7a8q d3d4 a8a1 d4c4 a1a4 c4d3 a4b3 d3d4 b3b6 d4e5 b6a5 e5d4 a5d5 d4e3 d5b3 e3f2 c6d5 e4g3 b3b6 f2e2 b6e6 e2f3 e6f7 f3e3 f7a7 e3f3 a7a2 g3e2 a2b3 f3f2 b3b6 f2f3 b6f6 f3e3 f6e7 e3d3 e7h7 d3d2 h7h6 d2d3 h6h3 d3c2 d5c4 c2d1 h3a3 d1e1 a3f3 e1d2 f3d5 d2e1 d5d8 e2g3 d8e7 e1f2 e7f6 f2e2 c4d5 e2e3 f6h6 e3f3 h6f8 f3g4 d5e5 g4h3 f8g8 h3h2 g8e6 g3h1 e5f4 h1f2 e6h6 h2g1
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1201 lowerbound nodes 746130142 nps 6758608 time 110397 multipv 1 pv a1b2 e4d2 c3c4 d2c4 a3b4 c4b2 b4b3 b1c1 a2a3 c1b1 c2c4 b2d3 a3a4 d3e5 b3b4 b1c2 a4a5 c2d3 b4c5 e5c4 a5a6 c4d2 a6a7 d2e4 c5d5 e4f6 d5c6 f6e4 a7a8q d3d4 a8d8 d4e3 c6d5 e4c3 d5c4 c3e2 d8e7 e3f3 e7b7 f3g3 c4d3 e2f4 d3e4 f4h3 b7g7 g3h2 e4d4 h3g1 g7h6 h2g3 h6e3 g3g2 e3e4 g2h2 e4f4 h2h3 f4f5 h3g3 d4e3 g1h3 f5h5 g3g2 h5d5 g2g3 d5f3 g3h2 f3e4 h2g3 e4c4 g3h2 c4c6
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1241 lowerbound nodes 749782386 nps 6736891 time 111295 multipv 1 pv a1b2 b1c2 c3c4 c2d3 a3b4 e4d6 c4c5 d6c8 c5c6 d3e4 b4c5 e4f5 a2a4 f5e6 a4a5 c8d6 a5a6 d6f7 a6a7 f7g5 a7a8q e6f5 c6c7 g5e6 c5b6
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1303 lowerbound nodes 754139775 nps 6717915 time 112258 multipv 1 pv a1b2 b1c2 c3c4 c2d3 a3b4 e4d6 c4c5 d6c8 c5c6 d3e4 b4c5 e4f5 a2a4 f5e6 a4a5 c8d6 a5a6 d6f7 a6a7 f7g5 a7a8q e6f5 c6c7 g5e6 c5b6
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1394 lowerbound nodes 758577692 nps 6699855 time 113223 multipv 1 pv a1b2 b1c2 c3c4 c2d3 a3b4 e4d6 c4c5 d6c8 c5c6 d3e4 b4c5 e4f5 a2a4 f5e6 a4a5 c8d6 a5a6 d6e4 c5b6 e6f5 a6a7 f5g4 a7a8q e4d2 c6c7 g4g3 b2e5 g3f2 c7c8q d2f3 e5d4 f2g3 a8f3
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1531 lowerbound nodes 763468953 nps 6683260 time 114236 multipv 1 pv a1b2 b1c2 c3c4 c2d3 a3b4 e4d6 c4c5 d6c8 c5c6 d3e4 b4c5 e4f5 a2a4 f5e6 a4a5 c8d6 a5a6 d6e4 c5b6 e6f5 a6a7 f5g4 a7a8q e4d2 c6c7 g4g3 b2e5 g3f2 c7c8q d2f3 e5d4 f2g3 a8f3
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 1736 lowerbound nodes 768765229 nps 6664804 time 115347 multipv 1 pv a1b2 b1c2 c3c4 c2d3 a3b4 e4d6 c4c5 d6c8 c5c6 d3e4 b4c5 e4f5 a2a4 f5e6 a4a5 c8d6 a5a6 d6f5 a6a7 f5h6 a7a8q e6f5 a8c8 f5g6 c8e6 g6h7 c6c7
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 2043 lowerbound nodes 774175996 nps 6643576 time 116530 multipv 1 pv a1b2 b1c2 c3c4 c2b1 b2g7 e4d6 c4c5 d6f7 c5c6 f7d8 c6c7 d8e6 c7c8q
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 2505 lowerbound nodes 780381183 nps 6580053 time 118598 multipv 1 pv a1b2 b1c2 c3c4 c2b1 b2g7 e4d6 c4c5 d6f7 c5c6 f7d8 c6c7 d8e6 c7c8q
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 3196 lowerbound nodes 787562426 nps 6510394 time 120970 multipv 1 pv a1b2 b1c2 c3c4 c2b1 b2g7 e4d6 c4c5 d6c4 a3b3 c4d2 b3b4 b1a2 c5c6 a2b1 c6c7 d2e4 c7c8q e4d6 c8h8 d6f7 h8a8
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 80 score cp 4233 lowerbound nodes 840949739 nps 6530076 time 128781 multipv 1 pv a1b2 e4d2 c3c4 d2c4 a3b4 c4b2 b4b3 b1c1 a2a3 c1b1 c2c4 b2d3 a3a4 d3e5 b3b4 b1c2 a4a5 c2d3 b4c5 e5c4 a5a6 c4d2 a6a7 d2e4 c5b6 d3c4 a7a8q e4d2 b6c6 c4d4 a8a7 d4e4 a7h7 e4e3 h7h6 e3d3 h6h3 d3e4 h3g2 d2f3 g2g4 e4e3 c6c5 e3f2 g4f4 f2e2 f4e4 e2f2 e4d3 f3g1 d3d4 f2g2 d4e3 g1h3 c5d4 h3f2 e3e6 g2f1 e6c6 f1e2 c6e6 e2f1
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 90 score cp 5788 lowerbound nodes 877819823 nps 6500779 time 135033 multipv 1 pv a1b2 b1c2 c3c4 c2d3 a3b4 e4d6 c4c5 d6e8 c5c6 d3e4 b4c5 e4f5 c5b6 f5e6 c6c7 e6d7 b2e5 d7c8 a2a4 c8d7 b6b7 d7e7 c7c8q
info depth 39 currmove a1b2 currmovenumber 1
info depth 39 seldepth 90 score cp 8120 lowerbound nodes 923005896 nps 6546512 time 140992 multipv 1 pv a1b2 b1c2 c3c4 c2d3 a3b4 e4d2 c4c5 d3c2 b2h8 c2d3 c5c6 d2c4 a2a4 c4b6 b4c5 b6a4 c5b5 a4c3 h8c3 d3e4 c6c7
info depth 40 currmove a1b2 currmovenumber 1
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Odd Stockfish output?

Post by zullil »

Four hours have passed, the engine is still running, but no output since

Code: Select all

info depth 40 currmove a1b2 currmovenumber 1
Jouni
Posts: 3283
Joined: Wed Mar 08, 2006 8:15 pm

Re: Odd Stockfish output?

Post by Jouni »

I got quite similar after going 36/37 ply in slower PC:

1.Bb2 Nd2 2.c4 Kxc2 3.c5 Nb1+ 4.Kb4 Kxb2 5.a4 Na3 6.c6 Nc2+ 7.Kc5 Na1 8.c7 Nb3+ 9.Kb5 Ka3 10.c8Q Ka2 11.Qc2+ Ka3 12.Qxb3+ Kxb3 13.a5 Kc3 14.a6 Kb3 15.a7
+- (80.88 ++) Depth: 36/83 00:03:19 695mN

Nothing more happens in 1 hour - maybe search explosion? I have seen this in SF search previously.
Jouni
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Odd Stockfish output?

Post by zullil »

Jouni wrote:I got quite similar after going 36/37 ply in slower PC:

1.Bb2 Nd2 2.c4 Kxc2 3.c5 Nb1+ 4.Kb4 Kxb2 5.a4 Na3 6.c6 Nc2+ 7.Kc5 Na1 8.c7 Nb3+ 9.Kb5 Ka3 10.c8Q Ka2 11.Qc2+ Ka3 12.Qxb3+ Kxb3 13.a5 Kc3 14.a6 Kb3 15.a7
+- (80.88 ++) Depth: 36/83 00:03:19 695mN

Nothing more happens in 1 hour - maybe search explosion? I have seen this in SF search previously.
Thanks. Does your GUI's output of 80.88 ++ indicate a lowerbound score of 80.88? If so, I guess what I saw is "normal" behavior, at least for Stockfish.
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Odd Stockfish output?

Post by zullil »

Jouni wrote:I got quite similar after going 36/37 ply in slower PC:

1.Bb2 Nd2 2.c4 Kxc2 3.c5 Nb1+ 4.Kb4 Kxb2 5.a4 Na3 6.c6 Nc2+ 7.Kc5 Na1 8.c7 Nb3+ 9.Kb5 Ka3 10.c8Q Ka2 11.Qc2+ Ka3 12.Qxb3+ Kxb3 13.a5 Kc3 14.a6 Kb3 15.a7
+- (80.88 ++) Depth: 36/83 00:03:19 695mN

Nothing more happens in 1 hour - maybe search explosion? I have seen this in SF search previously.
I finally terminated the engine after 20 hours with no further output.
Jouni
Posts: 3283
Joined: Wed Mar 08, 2006 8:15 pm

Re: Odd Stockfish output?

Post by Jouni »

In 2. try I got suddenly after 1 hour again new lines:



1.Bb2 Nd2 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Ne4 5.Bd4 Nd2+ 6.Kc3 Ne4+ 7.Kd3 Ng5 8.a4 Ne6 9.a5 Nc7 10.Be5 Nd5 11.Kc4 Ne7 12.a6 Nc8 13.Kb5 Kxc2 14.Kc5 Kd3 15.Kc6 Ke4 16.Kb7 Ne7 17.a7 Kxe5 18.a8Q Nf5 19.Qa5+ Ke4 20.Kc6 Nd4+ 21.Kd6
+- (8.34 ++) Depth: 30/55 00:00:18 60266kN
1.Bb2 Nd2 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Ne4 5.Bd4 Nd2+ 6.Kc3 Ne4+ 7.Kd3 Nd6 8.a4 Nc8 9.a5 Ka2 10.Bc5
+- (8.61 ++) Depth: 30/55 00:00:19 62793kN
1.Bb2 Nd2 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Nc5+ 6.Ka3 Nd3 7.Bd4 Kc2 8.c5 Nf4 9.c6 Nd5 10.Bg7 Kd3 11.Kb3 Ne7 12.c7 Ke4 13.Kc4 Nd5 14.c8N Ne3+ 15.Kc5 Kf5 16.a4 Ke6 17.a5 Kd7 18.Nd6 Kc7 19.Be5 Ng4 20.Bd4 Nh2 21.a6 Kb8 22.Kd5 Nf3 23.Be3 Nh4 24.Ke4 Ng6 25.Bd4 Ne7 26.Bf6
+- (8.36) Depth: 30/55 00:00:19 64189kN
1.Bb2 Nd2 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Nc5+ 6.Ka3 Nd3 7.Bd4 Kc2 8.c5 Nf4 9.c6 Nd5 10.Bg7 Kd3 11.Kb3 Ne7 12.c7 Ke4 13.Kc4 Nd5 14.c8N Ne3+ 15.Kc5 Kf5 16.a4 Ke6 17.a5 Kd7 18.Nd6 Kc7 19.Be5 Ng4 20.Bd4 Nh2 21.a6 Kb8 22.Kb6 Nf3 23.Bg7 Ng5 24.Bc3 Nf3 25.Bf6 Ka8
+- (8.44 ++) Depth: 31/55 00:00:20 66886kN
1.Bb2 Nd2 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Nc5+ 6.Ka3 Nd3 7.Bd4 Kc2 8.c5 Nf4 9.c6 Nd5 10.Bg7 Kd3 11.Kb3 Ne7 12.c7 Ke4 13.Kc4 Nd5 14.c8N Ne3+ 15.Kc5 Kf5 16.a4 Ke6 17.a5 Kd7 18.Nd6 Kc7 19.Be5 Ng4 20.Bd4 Nh2 21.a6 Kb8 22.Kb6 Nf3 23.Bf6 Ka8 24.Nc4 Kb8 25.Be5+ Ka8
+- (8.40) Depth: 31/55 00:00:20 67115kN
1.Bb2 Nd2 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Nc5+ 6.Ka3 Nd3 7.Bd4 Kc2 8.c5 Nf4 9.c6 Nd5 10.Bg7 Kd3 11.Kb3 Ne7 12.c7 Ke4 13.Kc4 Nd5 14.c8N Ne3+ 15.Kc5 Kf5 16.a4 Ke6 17.a5 Kd7 18.Nd6 Kc7 19.Be5 Ng4 20.Bd4 Nh2 21.a6 Kb8 22.Kb6 Nf3 23.Bf6 Ka8 24.Nc4 Kb8 25.Be7
+- (8.48 ++) Depth: 32/55 00:00:21 71392kN
+- (42.41 ++) Depth: 38/86 00:04:02 853mN
1.Bb2 Nd6 2.c4 Nb7 3.c5 Nd8 4.Bf6 Nf7 5.c6 Nd6 6.Bb2 Nc4+ 7.Kb4 Nxb2 8.c7 Kc1 9.c8Q Kd1 10.Qg4+ Ke1 11.Qe4+ Kf1 12.Qf3+ Kg1 13.Qc3 Kh1 14.Qxb2
+- (57.96 ++) Depth: 38/86 00:04:04 859mN
1.Bb2 Nd6 2.c4 Nb7 3.c5 Nd8 4.Bf6 Nf7 5.c6 Nd6 6.Bb2 Nc4+ 7.Kb4 Nxb2 8.c7 Kc1 9.c8Q Kd1 10.Qg4+ Ke1 11.Qe4+ Kf1 12.Qf3+ Kg1 13.Qc3 Kh1 14.Qxb2
+- (81.28 ++) Depth: 38/86 00:04:06 867mN
1.Bb2 Nd6 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Nc5+ 6.Ka3 Kc2 7.Be5 Kd2 8.Bg7 Ne6 9.Bf6 Ke3 10.Kb4 Ke4 11.a4 Kf5 12.Bc3 Nd8 13.a5 Ke6 14.a6 Kd7 15.Kc5 Kc8 16.Kb6 Kb8 17.c5 Ka8 18.Bf6 Ne6 19.c6 Nf4 20.Be5 Nd5+ 21.Kc5 Ne7 22.c7 Ka7 23.Kb5 Nc8 24.Bd4+ Ka8 25.Kc6 Ne7+ 26.Kd6 Nc8+ 27.Kc5 Ka7 28.Kb5+
+- (15.63) Depth: 39/86 00:56:00 11510mN
1.Bb2 Nd6 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Nc5+ 6.Ka3 Kc2 7.Be5 Kd3 8.Kb4 Ne6 9.a4 Ke4 10.Bd6 Nd4 11.a5 Kd3 12.c5 Ke4 13.Kc4 Nc6 14.a6 Kf5 15.Kb5 Na7+ 16.Kb6
+- (15.63) Depth: 40/86 00:56:03 11520mN
1.Bb2 Nd6 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Nc5+ 6.Ka3 Kc2 7.Be5 Kd2 8.Bh8 Kd3 9.Kb4 Na6+ 10.Kb5 Nc7+ 11.Kb6 Ne6 12.c5 Kc4 13.c6 Kb4 14.Bb2 Ka4 15.c7 Nxc7 16.Kxc7 Ka5 17.Bg7 Ka6 18.Kb8 Kb6 19.Bf8 Ka5 20.Kb7 Kb5 21.Bh6 Kc4
+- (15.71 ++) Depth: 41/86 00:56:11 11548mN
1.Bb2 Nd6 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Na5+ 6.Kb4 Nxc4 7.a4 Nxb2 8.a5 Nd3+ 9.Kb5 Kb2 10.a6 Kc1 11.Kb6 Kb2 12.a7 Kc2 13.Kc7 Kb2 14.a8Q Kc2 15.Qe4 Kc3 16.Kc6 Nb4+ 17.Kc5 Nd3+ 18.Kb5 Kd2 19.Kc4 Nf2 20.Qd4+ Ke2 21.Qd8 Ng4 22.Qd4 Nf2
+- (15.79 ++) Depth: 41/86 00:56:17 11566mN
1.Bb2 Nd6 2.c4 Nb7 3.c5 Na5 4.Ka4 Kxb2 5.Kxa5 Kc1 6.c6 Kd1 7.c7 Kxc2 8.c8Q+ Kb1 9.a4 Ka1 10.Qf5 Kb2 11.Kb6
+- (15.91 ++) Depth: 41/86 00:56:23 11587mN
1.Bb2 Nd6 2.c4 Nb7 3.c5 Na5 4.Ka4 Kxb2 5.Kxa5 Kc1 6.c6 Kd1 7.c7 Kxc2 8.c8Q+ Kb1 9.a4 Ka1 10.Qf5 Kb2 11.Kb6
+- (16.10 ++) Depth: 41/86 00:56:29 11610mN
1.Bb2 Nd6 2.c4 Nb7 3.c5 Na5 4.Ka4 Kxb2 5.Kxa5 Kc1 6.c6 Kd1 7.c7 Kxc2 8.c8Q+ Kb1 9.a4 Ka1 10.Qf5 Kb2 11.Kb6
+- (16.37 ++) Depth: 41/86 00:56:37 11637mN
1.Bb2 Nd6 2.c4 Nb7 3.c5 Na5 4.Ka4 Kxb2 5.Kxa5 Kc1 6.c6 Kd1 7.c7 Kxc2 8.c8Q+ Kb1 9.a4 Ka1 10.Qf5 Kb2 11.Kb6
+- (16.78 ++) Depth: 41/86 00:56:50 11681mN
1.Bb2 Nd6 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Na5+ 6.Kb4 Nxc4 7.a4 Nd6 8.Kc5 Nc8 9.Be5 Kc2 10.a5 Kb3 11.a6 Ka3 12.Kc6 Kb4
+- (15.55 --) Depth: 41/86 00:56:55 11699mN
1.Bb2 Nd6 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Na5+ 6.Kb4 Nxc4 7.a4 Nd6 8.Kc5 Nc8 9.Be5 Kc2 10.a5 Kb3 11.a6 Ka3 12.Kc6 Kb4
+- (14.64 --) Depth: 41/86 00:56:55 11699mN
1.Bb2 Nd6 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Na5+ 6.Kb4 Nxc4 7.a4 Nd6 8.Kc5 Nc8 9.Be5 Kc2 10.a5 Kb3 11.a6 Ka3 12.Kc6 Kb4 13.Kb7 Ka5 14.Bb8 Kb5 15.Bc7 Ne7 16.a7 Kc5 17.a8Q
+- (13.27 --) Depth: 41/86 00:56:56 11702mN
1.Bb2 Nd6 2.c4 Nxc4+ 3.Kb4 Nd6 4.Kb3 Nb7 5.c4 Na5+ 6.Kb4 Nxc4 7.a4 Nd6 8.Kc5 Nc8 9.Be5 Kc2 10.a5 Kb3 11.a6 Ka3 12.Kc6 Kb4 13.Kb7 Ka5 14.Bb8 Kb5 15.Bc7 Ne7 16.a7 Kc5 17.a8Q
+- (17.39 ++) Depth: 41/86 00:57:03 11725mN



But sometimes branching factor can be over 100x! And normal SF up-down evaluation.
Jouni