Author: Robert Hyatt
Date: 07:52:02 01/23/99
Go up one level in this thread
On January 23, 1999 at 10:12:36, Djordje Vidanovic wrote: >On January 23, 1999 at 00:07:11, Bruce Moreland wrote: > >>Isn't Bionic Impakt Crafty? Does anybody know what changes have been made to >>the program in order to distinguish it from the original Crafty? >> >>bruce > >I have been asked by Frank Quisinsky to translate his statement regarding Bionic >Impakt. Here it is: > >"Persönlich habe ich mich beim Dutch Open 98 (Bionic Impakt wurde dritter) >sehr lange mit Hans Secelle (Programmerer) unterhalten welcher mir >versicherte, das Bionic kein Crafty ist. Bionic Impakt beruht zwar auf dem >Source Code von Crafty (Version 9.26 und 15.20), jedoch wurde das Programm vor >einem Jahr völlig neu überarbeitet. Ferner hat Hans seine eigenen entwickelten >Ideen implementiert. Unter anderem sind die Bewertungsfunktionen, wie z. B. >Figurenfelder, Angriffsheuristiken, Bewertung an der Wurzel als auch das >Eröffnungsbuch und dessen Zeitkontrollen von Bionic übernommen wurden. >Persönlich schätzt Hans die taktischen Fähigkeiten gegenüber Crafty etwas >schlechter und die positionellen etwas stärker ein. Als Beweis dient hier >z.B. der LCT II Test welcher, völlig unterschiedliche Ergebnisse im Vergleich >zu Crafty aufzeigt. Ich habe das überprüft und Bionic hat wirklich nichts >mit Crafty gemeinsam." > >I spent lots of time with Hans Secelle during the Dutch Open 98 (Bionic placed >third) trying to make sure that Bionic is not Crafty. Bionic is based on >Crafty's source code (versions 9.26 and 15.20) but the program was completely >rewritten, which took a year. Furthermore, Hans implemented his own, original >ideas. Among others, the new evaluation functions such as piece squares, attack >heuristics, root-evals, as well as the opening book and time controls that were >taken over from Bionic [I presume the previous version of Bionic that had been >around for quite some time, say since 1991, Dj.V.]. Hans estimates that the >tactical abilities of Bionic are not on a par with Crafty, while its positional >play is somewhat better. The LCTII test can be used as evidence for this, as it >gives completely different scores when compared with Crafty. I have checked >this out and Crafty and Bionic have really nothing in common. > >Regards, >Djordje This is wrong. The version of bionic that playedin the first 1/2 of the Dutch tournament matched crafty _exactly_. Every move of every game except for 1 or 2. But that isn't nearly so important as one key thing they 'get'... that being a parallel search that no one else has. Which gives them a 2x-3x speed boost over everyone else. So to say 'it isn't crafty' is baloney. A few eval changes don't make a new program. I've also pointed out that anybody that takes the crafty source is _required_ to make that source public as part of the freeware project. They've never done this. IE I'd like to see a source version released that will _exactly_ match the Dutch tourney moves. _then_ we could _know_ what is different. They were going to do this, supposedly. But nothing has been done.
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