Junior 2010 vs. Rybka 3, one of the best games I ever saw!

[M ANSARI]

I think Junior is a good program, but not even close to being any of the top programs. At least not the version being sold. I do have a feeling that the full strength Junior is not being sold, and is only used for competitive matches. The reason I say that is because Junior always seems to score better than it should in competition. This could be due to better hardware, but I have a feeling it is due to a different strength version.

With regards to the position or the game, I think it was simply to show an attractive game and not to show Junior's superiority. This game could have easily been played if you had put two Rybka's against each other since Nc5 is played even at depth 16 yet within a second Rybka as white sees the crushing Knight check and dxe5. I would be very interested to see Junior's analysis before Nc5 and after Nc5. If it is able to quickly see that Nc5 fails then that is very good. Otherwise many engines with an opening that makes them reach that position could produce the same game against R3 ... including R3.

[OliverBr]

I think the critical point of the game is here

[d]2kr1br1/1pq2p1p/p1p1ppb1/P1n5/2NP4/2P2B1P/1P3PP1/R1BQ1RK1 w - - 0 16

Where Rybka had just played Nc5?

I think 25...Rb1 is a big blunder by Rybka. 25...f4 would make a much better defense!

[d]1k1q1br1/1p1P1p1p/pN6/P1P1pp2/8/2P1BB1P/5PP1/1R4K1 b - - 0 25

[M ANSARI]

Rybka is black so it cannot play Rb1 ... also position is already way lost at move 25 and there is no reasonable defence. f4 only loses quicker

after ... 25 f4

Junior 2010 - Rybka 3, Intel - 4600 (Junior 2010) 2009
[d]1k1q1br1/1p1P1p1p/pN6/P1P1p3/5p2/2P1BB1P/5PP1/1R4K1 w - - 0 1

Analysis by Rybka 3:

26.c6
+- (4.34) Depth: 6 00:00:00 5kN
26.c6
+- (4.87 !) Depth: 7 00:00:00 5kN
26.c6
+- (5.11 !) Depth: 7 00:00:00 5kN
26.c6
+- (5.51 !) Depth: 7 00:00:00 71kN
26.c6
+- (5.12) Depth: 7 00:00:00 92kN
26.c6
+- (7.82) Depth: 8 00:00:01 763kN
26.c6
+- (8.31) Depth: 9 00:00:06 2952kN
26.c6
+- (8.44) Depth: 10 00:00:17 8113kN
26.c6
+- (8.38) Depth: 11 00:00:34 16739kN
26.c6
+- (8.91) Depth: 12 00:01:14 41103kN
26.c6
+- (8.59) Depth: 13 00:01:56 60830kN
26.c6
+- (9.73) Depth: 14 00:03:57 119mN

[M ANSARI]

By the way here are other engine analysis after Nc5? and white to play. I guess some engines have problems with this position. R3 seems to be the best at finding the key line, but it would be interesting to see Junior's analysis as well.

Junior 2010 - Rybka 3, Intel - 4600 (Junior 2010) 2009
[d]2kr1br1/1pq2p1p/p1p1ppb1/P1n5/2NP4/2P2B1P/1P3PP1/R1BQ1RK1 w - - 0 1

Analysis by Stockfish 1.6s 64bit smooth scaling:

16.b4 Nd3 17.Ne3 Kb8 18.Be2 Nf4
= (0.04) Depth: 6 00:00:00 12kN
16.b4 Nd3 17.Qe2 Kb8 18.g3 e5 19.Be3 Bf5
= (-0.08) Depth: 7 00:00:00 61kN
16.Bd2 Nd3 17.Qb3 Kb8 18.Qb6 Qxb6 19.axb6 Bf5
= (0.12) Depth: 7 00:00:00 65kN
16.Bd2 Nd3 17.Qb3 Kb8 18.Qb6 Qxb6 19.axb6 Bf5
= (-0.08 --) Depth: 8 00:00:00 93kN
16.Bd2 Nd3 17.b4 Kb8 18.Qe2 Bd6 19.Nxd6 Qxd6 20.Bg4 h5 21.Bxh5 Bxh5 22.Qxd3
= (0.08) Depth: 9 00:00:00 252kN
16.Bd2 Nd3 17.b4 Kb8 18.Qe2 Bd6 19.Nxd6 Qxd6 20.Bh6 Bf5 21.Bg4 Bxg4 22.hxg4 Rg6 23.Qxd3 Rxh6
= (0.16) Depth: 10 00:00:00 533kN
16.Bd2 Ne4 17.Re1 Nxd2 18.Qxd2 Kb8 19.g3 Bf5 20.h4 c5 21.Nb6 cxd4 22.cxd4
= (0.16) Depth: 11 00:00:00 752kN
16.b4 Nd3 17.Qe2 Nxc1 18.Rfxc1 Kb8 19.Bh5 Bh6 20.Bxg6 Rxg6 21.Re1 Bf4 22.g3 Bxg3 23.fxg3 Qxg3+ 24.Kh1 Qxc3
= (0.24) Depth: 11 00:00:00 930kN
16.b4 Nd3 17.Qe2 Kb8 18.Bd2 Bd6 19.Nxd6 Qxd6 20.Bh6 Bf5 21.g4 Rg6 22.Qd2 e5 23.Be3
+/= (0.36) Depth: 12 00:00:00 1227kN
16.b4 Nd3 17.Qe2 Kb8 18.Bd2 Nf4 19.Bxf4 Qxf4 20.g3 Qf5 21.Bg4 Qc2
= (0.04 --) Depth: 13 00:00:00 2508kN
16.b4 Nd3 17.Qe2 Kb8 18.Rd1 Nxc1 19.Raxc1 Bh6 20.Ra1 Bf4 21.g3 Bf5 22.Bg2 Bh6 23.g4 Bg6
= (0.20) Depth: 14 00:00:00 4640kN
16.b4 Nd3 17.Qe2 Kb8 18.Rd1 Nxc1 19.Raxc1 Bh6 20.Ra1 Qf4 21.Bg4 Qg5 22.g3 Qb5 23.Re1 f5 24.Bf3 f4 25.g4
= (0.16) Depth: 15 00:00:01 7073kN
16.b4 Nd3 17.Qe2 Kb8 18.Rd1 Nxc1 19.Raxc1 Bh6 20.Ra1 Qf4 21.Bg4 Qe4 22.Ne3 Qf4 23.g3 Qc7 24.Nc4 f5 25.Bf3 f4 26.g4 Bg7 27.Nb6 h5 28.gxh5 Bf5 29.Bg2
= (0.16) Depth: 16 00:00:02 13605kN
16.b4 Nd3 17.Qe2 Kb8 18.Rd1 Nxc1 19.Raxc1 Bh6 20.Ra1 Qf4 21.Bg4 Qe4 22.Ne3 Bg5 23.Bf3 Qh4 24.g3 Bxe3 25.Qxe3 Qxh3 26.Qf4+ Ka7 27.Bg2 Qf5
= (0.12) Depth: 17 00:00:03 23568kN
16.b4 Nd3 17.Qe2 Kb8 18.Rd1 Nxc1 19.Raxc1 Bh6 20.Ra1 Qf4 21.Bg4 Qe4 22.Ne3 Bg5 23.Rd2 Bh6 24.Bf3 Qf4 25.g3 Qc7 26.Rdd1 Bxe3 27.Qxe3 Bf5 28.h4
= (0.20) Depth: 18 00:00:05 37842kN
16.b4 Nd3 17.Qe2 Kb8 18.Rd1 Nxc1 19.Raxc1 Bh6 20.Ra1 Qf4 21.Bg4 Qe4 22.Ne3 Bg5 23.Rd2 Bh6 24.Bf3 Qf4 25.g3 Qc7 26.Re1 Bf5 27.g4 Bf4
= (0.20) Depth: 19 00:00:07 52219kN
16.b4 Nd3 17.Qe2 Kb8 18.Be4 Nxc1 19.Rfxc1 Bxe4 20.Qxe4 f5 21.Qe5 Bh6 22.Rd1 Bf4 23.Qe2 Bh2+ 24.Kh1 Rg6 25.h4 Bd6 26.Qh5 Rdg8 27.g3 f4 28.Nxd6 Qxd6
= (0.12) Depth: 20 00:00:21 162mN
16.b4 Nd3 17.Qe2 Kb8 18.Be4 Nxc1 19.Rfxc1 Bxe4 20.Qxe4 f5 21.Qe5 Bh6 22.Rd1 Bf4 23.Qe2 Bh2+ 24.Kh1 Bd6 25.g3 h6 26.Re1 Bxg3 27.fxg3 Rxg3 28.Qh2 Rxc3
= (0.12) Depth: 21 00:00:44 338mN
16.b4 Nd3 17.Qe2 Kb8 18.Be4 Nxc1 19.Rfxc1 Bxe4 20.Qxe4 f5 21.Qf3 Be7 22.Re1 Rg7 23.Kh1 Rdg8 24.g3 Bd6 25.Nxd6 Qxd6 26.Rab1 f4 27.Qxf4 Qxf4 28.gxf4 Kc7 29.Rg1 Kd6 30.Kh2 Rxg1 31.Rxg1
= (0.08) Depth: 22 00:01:26 653mN
16.b4 Nd3 17.Be3 Nf4 18.h4 Bf5 19.g3 Nh3+ 20.Kh2 Bd6 21.Nxd6+ Qxd6 22.Bg2
+/= (0.28 !) Depth: 23 00:03:20 1520mN
16.b4 Nd3 17.Be3 Nf4 18.h4 Bf5 19.g3 Nd5 20.Qd2 Kb8 21.Rfe1 Bh3 22.Re2 Bf5 23.Rd1 Bg4 24.Bxg4 Rxg4 25.Qe1 Bd6 26.Rc2 h5 27.Re2 Bf4 28.Qd2 Rgg8 29.Bxf4 Nxf4
= (0.16) Depth: 24 00:04:38 2117mN


Junior 2010 - Rybka 3, Intel - 4600 (Junior 2010) 2009
2kr1br1/1pq2p1p/p1p1ppb1/P1n5/2NP4/2P2B1P/1P3PP1/R1BQ1RK1 w - - 0 1

Analysis by Naum 4_ 8 thread:

16.g3 Bf5 17.b4 Nd3 18.Ne3 Bg6
= (0.15) Depth: 6/16 00:00:00 13kN
16.g3 Bf5 17.b4 Nd3 18.Ne3 Bg6 19.Qb3
= (0.17) Depth: 7/18 00:00:00 31kN
16.g3 Bf5 17.b4 Nd3 18.Ne3 Bg6 19.Qb3 Kb8
= (0.09) Depth: 8/17 00:00:00 42kN
16.g3 Kb8 17.b4 Nd3 18.Be3 Bf5 19.Kh1 e5 20.Qc2
= (-0.01) Depth: 9/21 00:00:00 105kN
16.Nb6+ Kb8 17.dxc5 Rxd1 18.Rxd1 Bg7 19.Rd7 Qe5 20.Be3
+/= (0.47) Depth: 9/23 00:00:00 140kN
16.Bd2 Nd3 17.Qe2 Nf4 18.Bxf4 Qxf4 19.g3 Bf5 20.Bg2 Qh6
= (0.08) Depth: 10/28 00:00:00 474kN
16.Bd2 Ne4 17.Be3 Kb8 18.Qb3 Bf5 19.Qb6 Bd6 20.Nxd6 Qxd6 21.Kh1
= (0.09) Depth: 11/26 00:00:00 675kN
16.Bd2 Ne4 17.Be3 Kb8 18.Qb3 Bf5 19.Qb6 Bd6 20.Nxd6 Qxd6 21.Kh1 e5
= (0.09) Depth: 12/22 00:00:00 891kN
16.Bd2 Ne4 17.Be3 Kb8 18.Qb3 Bf5 19.Qb6 Bd6 20.Nxd6 Qxd6 21.Kh1 Rd7 22.g4
= (0.21) Depth: 13/29 00:00:00 2959kN
16.Bd2 Ne4 17.Re1 Nxd2 18.Qxd2 Bf5 19.Kh1 Kb8 20.b4 Rg6 21.Be4 Bxe4 22.Rxe4 Bh6
= (0.17) Depth: 14/38 00:00:01 4882kN
16.Bd2 Ne4 17.Re1 Nxd2 18.Qxd2 Bf5 19.Kh1 Kb8 20.b4 Rg6 21.Be4 Bxe4 22.Rxe4 Bd6 23.Rh4
= (0.17) Depth: 15/34 00:00:01 7456kN
16.Bd2 Ne4 17.Re1 Nxd2 18.Qxd2 Kb8 19.Kh1 h5 20.b4 h4 21.Rad1 Be7 22.Re2 e5 23.Rc1 exd4
= (0.01) Depth: 16/37 00:00:02 16312kN
16.Nb6+ Kb8 17.dxc5 Rxd1 18.Rxd1 Qe7 19.Be3 e5 20.Rd6 Bg7 21.Rad1 Bc2 22.R1d2 Bf5 23.Bg4 Bxg4
+/= (0.34) Depth: 16/43 00:00:04 30887kN
16.Nb6+ Kb8 17.dxc5 Rxd1 18.Rxd1 Qe7 19.Be3 e5 20.Rd6 Bg7 21.Rad1 f5 22.Rd7 Qe8 23.Re1 h5 24.Bg5
= (0.09) Depth: 17/45 00:00:12 90502kN
16.Nb6+ Kb8 17.dxc5 Rxd1 18.Rxd1 Qe7 19.Be3 e5 20.Rd6 Bg7 21.Rad1 f5 22.Rd7 Qe8 23.Re1 h5 24.Bg5 f6
= (0.09) Depth: 18/46 00:00:16 123mN
16.Nb6+ Kb8 17.dxc5 Rxd1 18.Rxd1 Qe7 19.Be3 e5 20.Rd6 Bg7 21.b4 Bf5 22.Bg4 Be6 23.Bxe6 fxe6 24.Rd7 Qe8 25.Rad1
= (0.13) Depth: 19/49 00:00:31 247mN
16.Nb6+ Kb8 17.dxc5 Rxd1 18.Rxd1 Qe7 19.b4 e5 20.b5 Kc7 21.Be3 Qe6 22.Na8+ Kc8 23.bxc6 bxc6 24.Be2 Kb7 25.Nb6 Bf5
+/- (1.03) Depth: 20/62 00:03:18 1441mN


Junior 2010 - Rybka 3, Intel - 4600 (Junior 2010) 2009
2kr1br1/1pq2p1p/p1p1ppb1/P1n5/2NP4/2P2B1P/1P3PP1/R1BQ1RK1 w - - 0 1

Analysis by Zappa Mexico II_64bit:

16.g3 Kb8 17.Bd2 Bd3 18.Be2 Bxc4 19.Bxc4 Ne4
= (0.00) Depth: 10/39 00:00:01 2086kN
16.b4 Nd3 17.g3 Bd6 18.Bh6 Bf5 19.Kh1 Kb8
= (0.09) Depth: 10/39 00:00:01 2725kN
16.b4 Nd3 17.g3 Bd6 18.Bh6 Bf5 19.Kh1
= (0.09) Depth: 10/39 00:00:01 3499kN
16.b4 Nd3 17.Be3 Kb8 18.g3 Bf5 19.Qe2 Bd6
= (0.17) Depth: 11/39 00:00:01 4755kN
16.b4 Nd3 17.Be3 Kb8 18.g3 Bf5 19.Qe2 Bd6
= (0.17) Depth: 11/39 00:00:01 5477kN
16.b4 Nd3 17.Be3 Kb8 18.Qe2 Nf4 19.Bxf4 Qxf4 20.g3 Qf5
= (0.15) Depth: 12/39 00:00:02 7071kN
16.b4 Nd3 17.Be3 Kb8 18.Qe2 Nf4 19.Bxf4 Qxf4 20.g3 Qf5
= (0.15) Depth: 12/39 00:00:02 9527kN
16.b4 Nd3 17.Be3 Kb8 18.g3 Bf5 19.Qe2 Nf4 20.Bxf4 Qxf4 21.Bg2 Qc7
= (0.23) Depth: 13/39 00:00:03 12482kN
16.b4 Nd3 17.Be3 Kb8 18.g3 Bf5 19.Qe2 Nf4 20.Bxf4 Qxf4 21.Bg2 Qc7
= (0.23) Depth: 13/39 00:00:03 14591kN
16.b4 Nd3 17.Be3 Kb8 18.g3 Bf5 19.Qe2 Nf4 20.Bxf4 Qxf4 21.Bg2 Qc7 22.Qe3
= (0.15) Depth: 14/39 00:00:04 18047kN
16.b4 Nd3 17.Be3 Kb8 18.g3 Bf5 19.Qe2 Nf4 20.Bxf4 Qxf4 21.Bg2 Qc7 22.Qe3
= (0.15) Depth: 14/39 00:00:06 32203kN
16.b4 Nd3 17.Be3 Kb8 18.g3 e5 19.Kh2 Be7 20.Be2 Nf4 21.Bxf4 exf4
= (0.23) Depth: 15/47 00:00:08 44051kN
16.b4 Nd3 17.Be3 Kb8 18.g3 e5 19.Kh2 Be7 20.Be2 Nf4 21.Bxf4 exf4
= (0.23) Depth: 15/47 00:00:10 52859kN
16.b4 Nd3 17.Be3 Kb8 18.g3 e5 19.Kh2 Be7 20.Be2 Nf4 21.Bxf4 exf4 22.Qd2 Be4 23.Qxf4 Qxf4 24.gxf4
= (0.17) Depth: 16/47 00:00:13 71748kN
16.b4 Nd3 17.Be3 Kb8 18.g3 e5 19.Kh2 Be7 20.Be2 Nf4 21.Bxf4 exf4 22.Qd2 Be4 23.Qxf4 Qxf4 24.gxf4
= (0.17) Depth: 16/47 00:00:20 117mN
16.b4 Nd3 17.Be3 Kb8 18.g3 e5 19.Bg4 Be4 20.Qe2 f5 21.dxe5 c5 22.Bf3 cxb4
= (0.03) Depth: 17/47 00:00:33 192mN
16.Bd2 Nd3 17.Qe2 Nf4 18.Bxf4 Qxf4 19.Qe3 Bh6 20.Qxf4 Bxf4 21.g3 Bh6 22.Rfe1 Bd3 23.Nb6+ Kc7 24.Bh5
= (0.15) Depth: 17/53 00:00:58 347mN
16.Bd2 Nd3 17.Qe2 Nf4 18.Bxf4 Qxf4 19.Qe3 Bh6 20.Qxf4 Bxf4 21.g3 Bh6 22.Rfe1 Bd3 23.Nb6+ Kc7 24.Bh5
= (0.15) Depth: 17/53 00:01:15 447mN
16.Bd2 Nd3 17.Qe2 Nf4 18.Bxf4 Qxf4 19.Qe3 Bh6 20.Qxf4 Bxf4 21.g3 Kc7 22.Be2 Bc2 23.Kh2 Be4 24.Rae1
= (0.13) Depth: 18/53 00:01:33 559mN
16.Bd2 Nd3 17.Qe2 Nf4 18.Bxf4 Qxf4 19.Qe3 Bh6 20.Qxf4 Bxf4 21.g3 Kc7 22.Be2 Bc2 23.Kh2 Be4 24.Rae1
= (0.13) Depth: 18/53 00:02:19 834mN
16.Bd2 Nd3 17.Qe2 Nf4 18.Bxf4 Qxf4 19.Qe3 Bh6 20.Qxf4 Bxf4 21.g3 Kc7 22.Be2 Bh6 23.Rfe1 Be4 24.Bh5 Bd3
= (0.19) Depth: 19/57 00:03:20 1199mN

[peter]

I would be very interested to see Junior's analysis before Nc5 and after Nc5. If it is able to quickly see that Nc5 fails then that is very good. Otherwise many engines with an opening that makes them reach that position could produce the same game against R3 ... including R3.

2kr1br1/1pqn1p1p/p1p1ppb1/P7/2NP4/2P2B1P/1P3PP1/R1BQ1RK1 b - - 0 1

Analysis by Deep Junior 2010 win32 UCI:

15...Ld6 16.g3 Lf5 17.h4 Kb8
+/= (0.66) Tiefe: 6 00:00:00 4kN
15...Lf5 16.b4 Lxh3 17.d5
+/= (0.56) Tiefe: 6 00:00:00 11kN
...
15...Lf5 16.Kh1 e5 17.Te1 Le6 18.b3 f5 19.Le2 Ld5 20.f3 Lxc4 21.Lxc4
+/= (0.66) Tiefe: 15 00:00:00 3109kN
15...Kb8 16.b4 Ld6 17.Kh1 Lh2 18.De2 Lf4
+/= (0.64) Tiefe: 15 00:00:01 10129kN
15...Kb8 16.b4 e5 17.Le3 Lf5 18.Lg4 Lxg4 19.hxg4 e4 20.f4 exf3 21.Dxf3 Ld6
+/= (0.65) Tiefe: 18 00:00:03 26758kN
15...Kb8 16.b4 e5 17.Le3 Lf5 18.Kh1 e4 19.Le2 Ld6 20.d5 cxd5 21.Dxd5 Le5 22.Dxf7 Sc5 23.Sxe5
+/- (0.77) Tiefe: 20 00:00:21 158mN

No proof 15... Nc5? is seen to fail but ...Kb8 seems to intend to avoid 16.Nb6+.
But look here, even if 15... Nc5? is no ponder- hit obviously, Junior comes up almost at once with good part of the main line and good eval, that's what you have to look for as for other engines, including R3, she also is stuck for quite a while till she comes up with +-, especially with 19.Rd7! in main line.



2kr1br1/1pq2p1p/p1p1ppb1/P1n5/2NP4/2P2B1P/1P3PP1/R1BQ1RK1 w - - 0 1

Analysis by Deep Junior 2010 win32 UCI3:

16.b4 Sd7 17.Ld2
+/- (0.77) Tiefe: 6 00:00:00 2kN
16.g3 Sd7 17.b4 Ld6
+/- (0.85) Tiefe: 6 00:00:00 6kN
16.g3 Kb8 17.b4 Se4 18.De1 Sd6 19.Lf4 e5 20.Sxd6 Lxd6
+/- (0.80) Tiefe: 9 00:00:00 95kN
16.g3 Kb8 17.Sb6 Sd7 18.Db3 Ld3 19.Td1 Lf5 20.h4 Sxb6 21.axb6
+/= (0.53) Tiefe: 12 00:00:00 694kN
16.b4 Sd3 17.Le3
+/- (0.77) Tiefe: 12 00:00:00 734kN
16.Sb6+
+/- (1.23) Tiefe: 12 00:00:00 1080kN
16.Sb6+ Kb8 17.dxc5 Txd1 18.Txd1 Lg7 19.Ta4 Ka7 20.Lf4 e5 21.Td7 Dxd7 22.Sxd7
+/- (1.25) Tiefe: 12 00:00:00 1155kN
16.Sb6+ Kb8 17.Le3 e5
+/- (0.76) Tiefe: 15 00:00:01 4178kN
16.b4 Sd3 17.Le3
+/- (0.77) Tiefe: 15 00:00:01 4994kN
16.b4 Sd3 17.Le3
+/- (0.77) Tiefe: 18 00:00:01 7338kN
16.b4 Sd3
+/- (0.74) Tiefe: 20 00:00:16 109mN
16.Sb6+
+/- (1.20) Tiefe: 20 00:00:32 159mN
16.Sb6+ Kb8 17.dxc5 Txd1 18.Txd1 Lg7 19.Td7 De5 20.Le3 Df5 21.Sc4 e5 22.Txb7+ Kxb7 23.Sd6+ Kc7 24.Sxf5 Lxf5 25.Le2
+- (1.45) Tiefe: 20 00:00:38 217mN
16.Sb6+ Kb8 17.dxc5 Txd1 18.Txd1 Lg7 19.Td7 De5 20.Le3 Df5 21.Sc4 e5 22.Txb7+ Kxb7 23.Sd6+ Kc7 24.Sxf5 Lxf5 25.Le2
+/- (1.20) Tiefe: 21 00:00:48 306mN
16.Sb6+
+- (1.63) Tiefe: 22 00:01:49 709mN
16.Sb6+ Kb8 17.dxc5 Txd1 18.Txd1 De7 19.Td7 De8 20.b4 e5 21.b5 De6 22.bxc6 bxc6 23.Le3 Lc2
+- (1.55) Tiefe: 23 00:02:39 988mN
16.Sb6+ Kb8 17.dxc5 Txd1 18.Txd1 De7 19.Td7 De8 20.b4 e5 21.b5 De6 22.bxc6 bxc6 23.Le3 Lc2 24.Tc1 Lf5 25.Tcd1
+- (1.64) Tiefe: 24 00:04:23 1635mN

[Rolf]

especially with 19.Rd7! in main line.

This is really a move for Rybka. It takes longer than I could wait to realise that bQxPc5 isnt working, I mean in advance, not at the instant, because the Qe8 is played a tempo. So, that might be the hidden reason for the difficulty of dxc5. And then it's open how exactly the settings were for the engines. Perhaps the Junior engine is made for such surprising Q sacs. But I read that overall it's not better than the best other engines. No wonder because such a sac isnt ordinary but happens too seldom to be important for tournament chess.

[Dayffd]

Just a very pretty game imo, without running it through any top tier engines, just a very enjoyable game to see.