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Subject: Re: How long before your program avoids RXE8

Author: Dan Kiski

Date: 22:54:29 03/07/99

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On March 07, 1999 at 04:29:12, blass uri wrote:

>
>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

I have tried with all programs, all play RXE8.
Fritz 5.32, Fritz 5.16, REBEL10, Rebel-tiger, MCP8.
I had stated 20 mins for 5.32 this was incorrect.
I am just letting these programs go on infinate analysis, is this correct?.
I find it interesting that junior avoids RXE8.
Dan Kiski.






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