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Brainfish‘s Comeback

by Arno Nickel

November 24, 2019. Brainfish is back, means on top, winning the 41th Engine Masters Tournament after a losing streak of 10 EMT‘s. Rodolfo Isidro, resident of the USA, using the nickname Ugnatniama, had an excellent start with 2 points out of 2 games.

With Black against IC oldie Ocirema (some kind of „book loss“) and with White gaining a huge positional advantage in the early middlegame against Khalid Omar. Not enough to win the tour, but to take the lead until the very last round, when he defeated MadMax777. All those scalps came – quite surprisingly – from Eman engines!

Second prize winner, nobody would have bet on, was CrapCleaner, Damir Desevac under the flag of Denmark, running a very hungry Raubfisch engine. He managed to defeat another IC oldie, Dovahkiin, with Black in the Ruy Lopez, just at round 1. In round 8 with the white pieces he beat Victorious, who landed in a bad rook ending with the French Defence. Yet, following a weak book line as White in the Italian Game he lost against Harry Potter, who with his tied rank 2.-5. saved Eman‘s honour in this tour apart vom Murx, same rank, who ran Eman XXX, which is a bit different from the original Eman-Stockfish, as LeelaZero is strongly involved in the middlegame and only later Stockfish does take over. Yet, CrapCleaner luckily got a second life, when he had the black pieces versus RyzOne, another Eman 4.51, who also followed a weak Italian book line in the last round.

By the way ... Hey, men – what are you doing with your books? This is no lottery, but a high class MASTER tour ...

Well, see this game ... It‘s a little master piece, though Black got outplayed in the long run.

Ugnatniama (2448) - MadMax777 (2430) [D41]

41st ENGINE MASTERS Sunday Nov. 24, 13 r, 29.01.2020

[JoJo]

1.d4 d5 2.c4 e6 3.c3 f6 4.cxd5 xd5 5.f3 c5 6.e4 xc3 7.bxc3 cxd4 8.cxd4 b4+ 9.d2 xd2+

10.xd2 0–0 11.c4 d7 12.0–0 b6 13.a4 b7 14.d3 f6 15.fe1 h6 16.b4 b8 17.ad1 d7 18.b5 f6

 

 

Black seems to have full control of the d5–square (Eman 4.51 evaluating this position with 0.00/37), but with his queen

vis-á-vis to White's rook on d1 things get tricky ...]

19.d5! exd5 20.exd5 xd5 21.c6 [(BrainFish: 1.32/34 !)]

21...a5 22.a3 xc6 [22...c8? 23.xd5 xd5 24.b3 c5 25.e5 - bingo!]

23.xd8 fxd8 24.e5 e8 25.a1 [(BrainFish: 1.15/38 = not so easy to convert the slight material advantage)]

25...d5 26.d1 b3 27.c1

 

 

27...bc8?! [Why on earth exchanging rooks here? Black's stronghold is the combined power of his rooks.]

28.xc8 xc8 29.h3 c5 30.d4 xa4

 

 

It looks like Black gained a pawn, but in fact he will lose both his queenside pawns ...]

31.c4 d7 32.h2 c6 33.xb6 g5 34.g4 f6 35.c4 d5 36.b6 d7 37.xa5 b5 38.d8+ h7 39.f3 d5 40.c7 h5 41.g3 e8 42.b7 f6 43.b6 b5 44.c7 g5 45.c2+ g7 46.c3 g6 47.d3+ g7 48.b3 d5 49.c3 g6 50.e3 e6 51.d4 a5 52.e1 a8 53.b1+ h6 54.e1 g6 55.g2 a4 56.d1 a5 57.d3+ g7 58.c3 a2+ 59.g1 hxg4 60.hxg4 g6 61.c6 h7 62.e7+ h6 63.g8+ g6 64.d4 a5 65.e7+ h6 66.g8+ g6 67.f2 a2+ 68.g3

 

 

Now Black is in a kind of Zugzwang and will inevitably lose material.]

68...a5 

[68...a3 69.e7+ h6 70.f5+ xf5 71.d6++–; 68...f8 69.f6+ h7 70.xg5 d7 71.e7 a8 72.f5+–]

69.d3+ g7 70.c3+ xg8 71.xa5 f6 72.b6 f7 73.f4 f8 74.f5 e7 75.b4+ e8 76.d6 f8 77.xf6 d7 [High time to resign.]

78.xg5 d5 79.f6 e6 80.e3 f8 81.g5 f7 82.a7+ d7 83.c7 g6 84.d8 e6 85.xd7 xg5 86.g4 xf6 87.d4+ g6 88.d6+ e6 89.xe6+ g7 90.g5 f8 91.d7 g8 92.f6 h8 93.g7#  1–0 

 

Flag

Rank

Player

Engine

Rating

+/-

1

2

3

4

5

6

7

8

9

10

11

12

13

TPoints

BH

SBP

1

ugnatniama

Brainfish ProV5.0

2406

+57

1/20

1/26

=/10

=/8

=/6

=/2

=/9

=/4

=/3

=/7

=/23

=/11

1/14

8.0/13

 

 

2

CrapCleaner

Raubfisch ME262

2437

+29

1/22

=/10

=/6

=/16

=/9

=/1

=/8

1/12

=/4

=/3

=/7

0/5

1/23

7.5/13

78

 

3

playfish

SF_Polyglot_20191105

2470

+21

=/25

=/18

=/23

=/12

=/11

=/4

1/16

=/6

=/1

=/2

1/10

=/7

=/5

7.5/13

77

 

4

Murx

Eman XXX

2431

+35

=/23

=/9

1/25

=/10

=/16

=/3

1/18

=/1

=/2

=/6

=/8

=/12

=/11

7.5/13

76.5

 

5

Harry_Potter

Eman 4.51

2413

+37

=/7

=/14

=/24

=/21

=/19

=/30

=/13

=/22

=/18

=/27

1/17

1/2

=/3

7.5/13

73.5

 

6

xeonrocks

LeelaSFv2

2484

+1

=/9

=/23

=/2

1/14

=/1

=/8

=/10

=/3

=/11

=/4

=/12

=/15

=/7

7.0/13

77.5

 

7

MCDermont

Eman XXX

2447

+14

=/5

=/8

=/13

=/15

=/24

=/17

=/14

=/11

1/25

=/1

=/2

=/3

=/6

7.0/13

77

 

8

Longin

Eman XXX

2446

+15

=/14

=/7

1/28

=/1

=/10

=/6

=/2

=/9

=/23

=/12

=/4

=/13

=/18

7.0/13

76.5

 

9

Thor

Eman 4.51

2433

+17

=/6

=/4

=/17

1/29

=/2

=/10

=/1

=/8

=/13

=/23

=/11

=/20

=/15

7.0/13

76

 

10

wardog218

Eman 4.51

2440

0

1/31

=/2

=/1

=/4

=/8

=/9

=/6

=/23

=/15

=/11

0/3

=/16

=/20

6.5/13

77.5

 

11

Katzenmaier

S-XPrO-NN-111119

2461

-1

=/33

=/12

=/15

=/13

=/3

=/18

=/23

=/7

=/6

=/10

=/9

=/1

=/4

6.5/13

76.5

 

12

Victorious

Eman 4.51

2462

-3

=/29

=/11

=/18

=/3

=/23

=/15

=/17

0/2

1/30

=/8

=/6

=/4

=/13

6.5/13

75

 

13

PublicEnemyN1