Author: Roy Eassa
Date: 13:18:56 02/01/02
Go up one level in this thread
On February 01, 2002 at 15:25:26, John Merlino wrote:
>These two positions are from Ariel-Altounian, Round 8 of the recent US
>Championships. This game won a Brilliancy Prize for Ariel.
>
>[D]8/1p6/p1b1P3/P1Pn1Pk1/2P3P1/8/3KB2r/5R2 b - c3 0 46
>
>The annotation on the Seattle Chess Federation's website (they hosted the
>Championships) say that the next move, 46...Nf4, is "a huge blunder", since it
>allows 47.Rxf4 Kxf4 (which was played, and White went on to win). However,
>CM8000 doesn't see anything better for Black, nor does it see a big win for
>White. What do other engines say?
>
>Time Depth Score Positions Moves
>0:00 1/3 0.94 810 46...Nf4 47.Re1 Kf6
>0:00 1/4 0.71 2110 46...Nf4 47.Rxf4 Kxf4 48.f6 Ke5
> 49.f7
>0:00 2/5 0.11 9816 46...Nf4 47.Re1 Kf6 48.e7 Kxe7
> 49.g5 Kf7
>0:00 3/6 0.00 16977 46...Nf4 47.Re1 Ng2 48.Rf1 Nf4
>0:00 4/7 0.73 59578 46...Nf4 47.Rxf4 Kxf4 48.f6 Ke5
> 49.f7 Rf2 50.Ke3 Rf4
>0:02 5/8 0.36 207798 46...Nf4 47.Rxf4 Kxf4 48.f6 Ke5
> 49.f7 Rf2 50.Ke3 Rf4 51.g5
>0:08 6/9 0.41 668722 46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8
> 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6
>0:31 7/10 0.27 2603901 46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8
> 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6
> 52.Ke3 Ke7
>1:38 8/11 0.39 8162267 46...Nf4 47.Rxf4 Kxf4 48.f6 Ke5
> 49.f7 Rf2 50.Ke3 Rf4 51.g5 Re4+
> 52.Kf2 Rf4+ 53.Kg3 Rf5 54.Bg4
>5:57 9/12 0.29 29643766 46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8
> 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6
> 52.Ke3 Rd8 53.Kf4 Rd4+ 54.Kg3
>
Analysis by Fritz 7 (Athlon 1.2):
46...Nf6 47.Kd3 Rh3+ 48.Kd4 Ra3 49.e7 Rxa5 50.Bf3 Ra2 51.Ke5 Bxf3 52.Rxf3 Re2+
53.Kd6 Nxg4
² (0.34) Depth: 10/24 00:00:00 249kN
46...Nf6 47.Kd3 Rh3+ 48.Kd4 Ra3 49.e7 Rxa5 50.Bf3 Ra2 51.Ke5 Bxf3 52.Rxf3 Re2+
53.Kd6 Nxg4
² (0.34) Depth: 11/24 00:00:00 526kN
46...Nf6 47.Kd3 Rh3+ 48.Kd4 Ra3 49.e7 Rxa5 50.Bf3 Ra2 51.Ke5 Bxf3 52.Rxf3 Re2+
53.Kd6 Nxg4
² (0.34) Depth: 12/26 00:00:01 1139kN
46...Nf4!
² (0.31) Depth: 12/26 00:00:01 1238kN
46...Nf4!
= (0.15) Depth: 12/26 00:00:02 1288kN
46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6 52.Ke3 Ke7
= (0.00) Depth: 13/27 00:00:03 2243kN
46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Rd8+ 52.Ke3 Kf6
53.Kf4
= (0.21) Depth: 14/27 00:00:06 4469kN
46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6 52.Ke3 Rh8
53.Kf4 Ke7
= (0.25) Depth: 15/30 00:00:18 11187kN
46...Nf4 47.Rxf4 Kxf4 48.f6 Rh8 49.f7 Rf8 50.Bd3 Ke5 51.Bf5 Kf6 52.Ke3 Ke7 53.g5
Rd8
² (0.46) Depth: 16/31 00:00:43 27723kN
46...Nf6!
² (0.43) Depth: 16/31 00:00:51 32873kN
46...Nf6 47.Kd3 Rh3+ 48.Kd4 Ra3 49.e7 Rxa5 50.Bf3 Ra2 51.Bxc6 bxc6 52.Re1 Rg2
53.e8Q Rxg4+
² (0.34) Depth: 16/36 00:01:10 45798kN
46...Nf6 47.Kd3 Be4+ 48.Ke3 Bc6 49.Rg1 Rh3+ 50.Kd4 Ra3 51.e7 Rxa5 52.Rg3 Ra2
53.Re3 Rd2+
= (0.25) Depth: 17/37 00:02:42 106594kN
46...Nf6 47.Kd3 Be4+ 48.Ke3 Bc6 49.Re1 Rh4 50.Kd3 Nxg4 51.Bxg4
= (0.25) Depth: 18/38 00:06:00 231828kN
Whole game, with analysis aided by Fritz 7b:
1.e4 d6 2.d4 Nf6 3.Nc3 c6 4.f4 Qa5 5.e5 Ne4 6.Bd3 Nxc3 7.Qd2 d5 8.bxc3 c5 9.Nf3
Nc6 10.0-0 e6 11.dxc5 Bxc5+ 12.Kh1 a6 13.Qe1 Bd7 14.a4 Qc7 15.Qg3 g6 16.Ng5 Ne7
17.Qh4 h6 18.Nxf7 Kxf7 19.Bxg6+ Kg8
[19...Kxg6?? 20.Qf6+ Kh5 21.Rf3 Bf2 22.Rh3+ Kg4 23.Rxh6 mates
]
20.Qh5 Kg7 21.Bd3 Rag8 22.Rf3 Be8
[22...Qc6 =+
]
23.Qh4 Ng6 24.Qf6+ Kh7 25.Qxe6 += Qd7 26.Qxd7+ Bxd7 27.Bd2 Rf8
[27...Kg7 =
]
28.e6 Bc6?
[28...Be8 =
]
29.Re1?
[29.h4! Kg7
(29...h5 30.f5 Ne5 31.f6+ +-)
30.Rg3 Rf6 31.f5 Bf2 32.Rxg6+ Rxg6 33.fxg6 Bxh4 34.a5 +-
]
29...Rf6 30.f5 Ne7 31.Bf4 d4?
[31...Bxa4 32.Be5 Rhf8 =
]
32.Be5 +- Rhf8 33.cxd4 Bxf3
[a little better would be 33...Bb4 34.Rb1 a5 35.Rh3
]
34.dxc5?
[34.gxf3 +-
]
34...Bc6
[or 34...Bg4 +=
]
35.Bxf6 Rxf6 36.a5 h5 37.Kg1 h4?
[37...Kg7 38.Rf1 Rf8 39.h3 Kf6 =
]
38.g4! hxg3 39.hxg3 Kh6 40.g4 Kg5 41.Be2 Kf4?
[41...Rh6 42.Rd1 Rh3 =
]
42.Kf2 Rh6 43.Rf1 Nd5 44.Ke1+ Kg5 45.Kd2 Rh2 46.c4 Nf4
{See Fritz's analysis above}
47.Rxf4 Kxf4 48.f6 Rh8 49.f7 Rf8
[49...Be8 50.Bf3! still wins
]
50.Bf3! +- Be8 51.fxe8Q Rxe8 52.Bxb7 Rxe6 53.c6 Re7 54.Bxa6 Ke5 55.Bb7 1-0
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