Author: Chessfun
Date: 19:23:41 07/17/00
Go up one level in this thread
On July 17, 2000 at 20:24:41, Robert Hyatt wrote:
>On July 17, 2000 at 18:02:43, Albert Silver wrote:
>
>>On July 17, 2000 at 16:25:45, Robert Hyatt wrote:
>>
>>>On July 17, 2000 at 14:47:24, blass uri wrote:
>>>
>>>>On July 17, 2000 at 13:40:45, Robert Hyatt wrote:
>>>>
>>>><snipped>
>>>>>>27. Rxb7 Rd7 28. Rxd7
>>>>>>
>>>>>>{White can play 28. Bxf7+ Rxf7 29. Qd5 Qa1+ 30. Kf2 Rf8 31. Bf4 and black looks
>>>>>>bad, although the result is still unclear.
>>>>>>
>>>>>>Leko offered here a draw. I chose to continue because after this move Junior's
>>>>>>eval switched sign to positive. After the game Leko said that a GM as black
>>>>>>would be looking for ways to draw, not to win}
>>>>>
>>>>>Your eval was positive here? I looked at this a while and concluded black is
>>>>>probably losing. I sicced crafty on it for a while and it failed low at every
>>>>>iteration. After 13 it was -1.61... at 14 it was -2.10, at 15 -2.25, etc...
>>>>>
>>>>>what did DJ see to produce a + eval? I am searching the position after 28. Bxf7
>>>>>which is what Crafty had for the best move for white by far...
>>>>
>>>>You are looking in the wrong position.
>>>>
>>>>Leko offered a draw when he played 28.Rxd7 so you should look in the position
>>>>after 28.Rxd7
>>>>
>>>>I think that 28.Bxf7 is winning.
>>>
>>>
>I was reading everything he said. He mentioned Junior was expecting the Bxf7+
>line but was (I think) nowhere near my -2 score...
>
I think what he said was White can play Bxf7 and then posted a line.
I am not sure Deep expected Bxf7 at the time Rxd7 was played.
I expected your line to continue from Amir's 29....Qa1+ as that
was what he had posted.
>After Bxf7, it had this at depth=13:
> 13-> 2:12 -1.61 28. ... Rxf7 29. Qd5 Rf8 30. Bf4 h4
> 31. Bd6 Qe8 32. c5 a4 33. c6 a3 34.
> Bxa3 Qe3+ 35. Kh2
>
>It failed low at 14 to this:
>
> 14 2:18 -- 28. ... Rxf7
> 14 3:01 -2.09 28. ... Rxf7 29. Qd5 Rf8 30. Bf4 Qe8 31.
> Bd6 Kh7 32. Qxh5+ Kg8 33. Qd5 Kh7 34. Bxf8
> Qe3+ 35. Kf1 Qc1+ 36. Kf2 Qxc2+ 37.
> Ke3 Rxf8 <HT>
At 31....Kh7 Deep prefers Qe1+ with the following.
Leko,P - DEEP JUNIOR 6
Analysis by Deep Junior 6.0:
31...Qe1+ 32.Kh2 h4 33.c5 a4 34.Qa2 Qe3 35.Qc4
± (1.14) Depth: 16 00:00:43 11721kN
31...Qe1+ 32.Kh2 h4 33.c5 a4 34.Qa2 Qe3 35.Qc4
± (1.14) Depth: 17 00:01:58 32111kN
31...Qe1+ 32.Kh2 h4 33.c5 a4 34.Qa2 f5 35.Rb1 Qf2 36.Bxf8 Qf4+ 37.Kh1 Kxf8
38.Qe6
± (1.20) Depth: 18 00:04:01 62900kN
(Bird, Scarb 17.07.2000)
At the end of the line you posted Deep scores it as:
Analysis by Deep Junior 6.0:
38.Re7 Kh6 39.Qe4 Qc1+ 40.Kf2 Qc2+ 41.Kg3 f5 42.Qd4 f4+ 43.Kh2 Rf6
± (1.14) Depth: 13 00:00:58 21499kN
38.Re7 Kh6 39.g4 Qc1+ 40.Ke2 Qc2+ 41.Kf3 g6 42.Qe4 Qd1+ 43.Kg3 Qg1+ 44.Qg2 Qc5
45.Qd2+ g5 46.Qe1
± (1.14) Depth: 14 00:02:38 56604kN
(Bird, Scarb 17.07.2000)
As I said earlier, I am not sure that black can survive I was
just a little surprized to see a +2.00 score after Bxf7.
I had looked at this with Deep earlier.
What about a line with 29......Qa1. which is what Deep prefers.
30. Kf2 Ref8 31. Bf4 Amirs line then Qc3 32. Bd6 Qd2+ 33. Kg1 prefered by
Crafty Kf3 expected by Deep.
carrying on from Crafty 33. Kg1 Qe3+ 34. Kh2 h4 35. C5
Leko,P - DEEP JUNIOR 6
5rk1/1R3rp1/3B1p2/p2Q4/2P4p/3Pq2P/2P3PK/8 w - - 0 1
Analysis by Crafty 17.11:
35.c3 f5 36.Re7 Qf2 37.Rxf7 Rxf7 38.Qxa5 Kh7 39.Qc5 Qf1
² (0.69) Depth: 9/22 00:00:09 1413kN
35.c5
± (1.09) Depth: 9/22 00:00:09 1531kN
35.c5
+- (1.48) Depth: 10/24 00:00:19 3476kN
35.c5 f5 36.Re7 Qg5 37.c6 Qf6 38.Rxf7 Qxf7
+- (3.93) Depth: 10/24 00:00:37 6736kN
35.c5 f5 36.Re7 Qg5 37.c6 Qf6 38.Rxf7 Qxf7 39.Qxf7+ Rxf7 40.c7 Rxc7 41.Bxc7 a4
42.c4
+- (4.13) Depth: 11/28 00:00:44 8070kN
35.c5 f5 36.Re7 Qf2 37.c6 f4 38.c7 f3 39.Qxf7+ Rxf7 40.c8Q+ Kh7 41.Qg4 Rxe7
42.Bxe7 fxg2 43.Qxg2 Qf4+ 44.Kg1
+- (4.11) Depth: 12/29 00:00:58 10839kN
35.c5 f5 36.Re7 Qf2 37.c6 f4 38.c7 f3 39.Qxf7+ Rxf7 40.c8Q+ Kh7 41.Qg4 Rxe7
42.Bxe7 fxg2 43.Qxh4+ Qxh4 44.Bxh4 g5 45.Bxg5
+- (4.17) Depth: 13/33 00:01:25 16262kN
(Bird, Scarb 17.07.2000)
Leko,P - DEEP JUNIOR 6
5rk1/1R3rp1/3B1p2/p1PQ4/7p/3Pq2P/2P3PK/8 b - - 0 1
Analysis by Deep Junior 6.0:
35...f5 36.Re7 Qg5 37.c6 Qf6 38.c7 Qa1
± (1.02) Depth: 12 00:00:04 1248kN
35...f5 36.Re7
± (1.32) Depth: 15 00:00:33 9324kN
35...f5 36.Re7 Qg5 37.c6 Qf6 38.Rxf7 Qxf7 39.Qxf7+ Rxf7 40.c7 Rxc7 41.Bxc7 a4
42.Bd8 a3 43.Bxh4 a2
+- (2.89) Depth: 17 00:02:30 44876kN
(Bird, Scarb 17.07.2000)
So it may well be that the Qa1 line is worse than the Ref8 line.
Thanks.
>>
>>>
>>>
>>>>
>>>>Uri
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