Author: Vincent Diepeveen
Date: 03:47:40 09/01/01
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On August 31, 2001 at 19:41:41, Bruce Moreland wrote: >On August 31, 2001 at 19:31:12, Slater Wold wrote: > >>** Weird. It takes DT-2 at least 6 hours to find this, while Deep Shredder >>finds the _EXACT_ same varation in a little over 8 minutes. However, like Bruce >>says, there sure isn't a big score. Deep Shredder thinks it's the best move, >>but only based on it loses the least. While actually it's winning. ** > >I liked your post, but I'll respond to this one small section. > >I think that one of the reasons the Nolot test is interesting is that we can >compare our programs with DT circa 1994. > >Based upon the results I have seen, produced by both my program and others, I >think we are getting close to DT. We're certainly in the same ballpark with >regard to heavy king tactics. > >bruce Schach 3.0 was already at a 133Mhz machine at the same level because it combined singular extensions with recaptures with always extending checks (not in qsearch i assume). the basic thing is that i hardly extend checks and i do not do recaptures, but i do all singular crap and some threat extensions and a big problem is that my mating extension is turned off right now. If i turn all those things on, then several positions become dead easy like Rxc5 is 2 seconds then within 10 seconds a huge score. Nxh6 is also a few seconds then and after a few minutes a huge score. Nxe6 goes even quicker then as that position is only about king safety and some patzer moves. I remember a time that i was one of the few solving Rxf7 a few years ago, only DT being the other, this has to do with how you evaluate the queen versus rook. Most evaluate the queen as being 9 pawns, i always evaluated it as around 11.75 pawns or something, so winning a queen there it is very happy. Why i do not solve the Nxg5 position is also directly clear then: My queen is evaluated too high in that position! In short a few positions are about how much worth yoru queen is (2 at least) 1 position Rxh6 is about the passed pawn on h5 which runs to queen quickly, and the others are about king safety and extending mate threads. This testset is hard, but it definitely is solvable for most positions by simplistic extensions and a very rude but high scoring king safety! Best regards, Vincent
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