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Subject: Re: What's your programs worst ever move ?

Author: Geoff

Date: 06:04:58 08/30/03

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On August 30, 2003 at 08:40:19, Uri Blass wrote:

>On August 30, 2003 at 08:18:41, Geoff wrote:
>
>>Hi
>>
>>My program just "excelled" itself with my favourite worst ever move.
>>This shambles wasn't due to an obvious bug as such, more just to lack of search
>>depth. Here is the position
>>
>>[D]2r3k1/1b2n1bp/p2N4/1p6/6Q1/1P6/1PqN1PPP/R5K1 b - - 0 30
>>
>>My program was playing black, my opponent offered me 2 tempting hung pieces
>>adjacent to my queen. My program avoided the knight capture, but couldn't resist
>>gobbling up the white pawn on b2.
>>Can you see the outcome of this move just be looking at the position? I couldnt
>>really see it, but most computer analysis will show it very quickly.
>>Hint: I got smothered, very elegantly !!
>
>Yes
>This idea is a known idea for chess player and I guess that even most players
>with rating 1600 will have no problem to see it.
>
>
>>
>>The other reason I found this quite amusing was the opponent that trapped me
>>into this blunder. Was it Shredder?, Junior?, Fritz? , nope just humble old TSCP
>>:-)
>>
>>Anyone else got a favorite clanger that wasn't due to just an obvious bug ?
>>
>>        Regards Geoff
>
>I can only tell you that if my program does not find something simple like that
>in less than 0.1 second then it is a clear proof that it has bugs or problems
>that I need to fix.
>
>Uri

Hi Uri

I would be interested to see how long it takes and how many nodes before your
program avoid either b2 or b4 ? Could you post some output please ?

Yes I know its not very good, but here is my current version's output

Ply  Eval   Time      Nodes   Principle Variation
 1:   183      0        171   c2b2
 2:   178      0        823   c2b2 a1d1
 3:   172      0       3620   c2b2 g4e6 g8h8
 4:   167      1      12755   c2b2 g4e6 g8h8 a1d1
 5:   155      6      46465   c2b2 g4e6 g8h8 a1e1 c8c1 d6b7 b2d2
 6:   155     12     114778   c2b2
 7:    20     65     603463   c2d2 g4e6 g8h8 d6f7 h8g8 f7d6
 8:    20    106     963192   c2d2 g4e6 g8h8 d6f7 h8g8 f7d6
 9:    20    218    2071857   c2d2 g4e6 g8h8 d6f7 h8g8 f7d6
10:    20    435    4045469   c2d2 g4e6 g8h8 d6f7 h8g8 f7d6
11:    20   2267   21624492   c8c7 g4e6 g8h8 d6f7 h8g8 f7d6







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