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Subject: Re: How long before your program avoids RXE8

Author: blass uri

Date: 01:29:12 03/07/99

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On March 07, 1999 at 04:26:37, blass uri wrote:

>
>On March 07, 1999 at 02:08:34, Dan Kiski wrote:
>
>
>>"It was a shocker because it looks like it simply loses to 24.Rxe8 Qxe8 25.Bxf6
>>leaving White with a material advantage and four active minor pieces. But the
>>Ukrainian wizard had set a wicked trap! Play could continue 25...Bb4 26.Qd1 Qe3+
>>27.Kh1 Qf4! and the f6 bishop is trapped!! YOW! Or 26.Qf2 Be1 27.Qf1 Qe3+ 28.Kh1
>>Bh4! 29.Bxh4 Qxd4 30.Bf2 Qd2 31.Nc5 d4!! 32.Nxb7 Rxc2 winning! Fritz 5.32 takes
>>over six minutes on my machine to realize that 24.Rxe8? is a loser and takes
>>another 10 before it prefers Kasparov’s 24.Re2. (Junior 5 is a bit quicker.)"
>>Quote from Mig.
>>
>>Most comps choose RxE8 in the game Kasparov played RE2. In takes my Fritz 5.32
>>over 20 mins to choose RE2, mig at TWIC claims his takes only 10 mins could be
>>he has a much faster computer.
>>I am interested in seeing other program times and computers.
>
>Junior5 needs 8 minutes and 33 seconds to find Re2 at iteration 16 after
>searching 66123 Knodes
>
>Junior5.3 needs 9 minutes and 9 seconds to find Re2 at iteration 16 after 73089
>Knodes.
>
>on the other hand Junior5.3 can finish iteration 15 after 3 minutes and 16
>seconds when Junior5 needs 3 minutes and 24 seconds to finish iteration 15.
>
>This is probably the reson that Junior5.3 can find the move if I give it time
>control of 1 hour per 10 move+2 hours per 20 moves when Junior5 cannot find Re2
>with the same time control.
>
>Junior5 and Junior5.3 do not see that Rxe8 is losing and reject it for
>positional reasons.
>
>Junior5's evaluation is 0.05 advantage for white at depth 16  and reject it
>because Re2 gives white 0.19 pawn advantage and Junior5.3 has better positional
>understanding and evaluates Re2 as 0.13 advantage for black at iteration 16
>
>Uri

I mean evaluates Rxe8 as 0.13 advantage for black

sorry for the double post

Uri



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