Last Rybka Thread for now...

[Alexander Schmidt]

Be sure some people check this.

perhaps your group should be putting other top engines under the microscope also.

Do you even read my posts before u answer?

[Graham Banks]

Be sure some people check this.

perhaps your group should be putting other top engines under the microscope also.

Do you even read my posts before u answer?

So some are disassembling the exes of these other top engines to look for code similarities in them also?

[GenoM]

Be sure some people check this.

perhaps your group should be putting other top engines under the microscope also.

Do you even read my posts before u answer?

So some are disassembling the exes of these other top engines to look for code similarities in them also?

Why asking?
People have work to do. Suppose they work on hypotetical case "Commercial engine X is a clone of other commercial engine Y". What for they would do that??? Commercial engines has their stuff, let's their stuff set such cases clear. That's not our business. That's their business. Here all is about free engine. One can not make all the work.
And finally, I have a suspicion deep in me, that if Zach and others were working on other case you would ask the same question... "Why exactly this and not that?"

[Alexander Schmidt]

So some are disassembling the exes of these other top engines to look for code similarities in them also?

Not that I am aware of.

But other Top engines where also checked for similaries. There are several things that you can test, output, error messages, testpositions with special behaviour.

But it becomes hard lately since there are many very strong open source engines available. It was easier when nearly all clones where based on Fruit...

[Alexander Schmidt]

perhaps your group should be putting other top engines under the microscope also.

And btw, I am not in a group... Once I spent a lot of time in uci engines and found a few clones, like others did.

[Graham Banks]

So some are disassembling the exes of these other top engines to look for code similarities in them also?

Not that I am aware of.

But other Top engines where also checked for similaries. There are several things that you can test, output, error messages, testpositions with special behaviour.

But it becomes hard lately since there are many very strong open source engines available. It was easier when nearly all clones where based on Fruit...

Okay. Thanks for your answer Alexander. I know that you've done some good work uncovering clones in the past.

Cheers, Graham.

[Graham Banks]

perhaps your group should be putting other top engines under the microscope also.

And btw, I am not in a group... Once I spent a lot of time in uci engines and found a few clones, like others did.

Okay - my question should have been directed at Zach and Christophe then I guess.

[Graham Banks]

Be sure some people check this.

perhaps your group should be putting other top engines under the microscope also.

Do you even read my posts before u answer?

So some are disassembling the exes of these other top engines to look for code similarities in them also?

Why asking?
People have work to do. Suppose they work on hypotetical case "Commercial engine X is a clone of other commercial engine Y". What for they would do that??? Commercial engines has their stuff, let's their stuff set such cases clear. That's not our business. That's their business. Here all is about free engine. One can not make all the work.
And finally, I have a suspicion deep in me, that if Zach and others were working on other case you would ask the same question... "Why exactly this and not that?"

The implication has been made that if Rybka 1.0 breaks GPL in their eyes, then Rybka 2 and Rybka 3 are also likely to have done so.
Rybka 3 is not free.
When suspicions have been mentioned with regards to some other top engines, why should one then choose to be selective?

[mclane]

Alexander,

This won't do. Please provide:

1) the disassembler you used, preferable with download link;

2) The offsets in both executables of the alleged similar code chunks so a few of us can check ourselves.

3) List the assembler code of both chunks. Are they 100% identical? I would like to see with my own eyes.

Also consider:

1) Have you checked Fruit with other engines? Maybe such similarities are not so uncommon at all? What if you find similar chunks in Fritz, Shredder, Tiger, Hiarcs etc. ?

2) The fact that you don't know if there possible is an agreement between Vas and Fabien that allows Vas to use Fruit code and that both gentlemen also decided to keep that silent. Maybe Vas even paid Fabien for the service. Seems such a natural explanation and if true you better stop your research. Why not research this as first?

Bottom line, you are far from having proofed anything.

Awaiting regards,

Ed

yes, thanks ed.
that seems a very plausible explanation. that fabien programmed somehow fruit AND rybka and that we therefore have those similarities.

[Albert Silver]

2) The fact that you don't know if there possible is an agreement between Vas and Fabien that allows Vas to use Fruit code and that both gentlemen also decided to keep that silent. Maybe Vas even paid Fabien for the service. Seems such a natural explanation and if true you better stop your research. Why not research this as first?

Bottom line, you are far from having proofed anything.

Awaiting regards,

Ed

yes, thanks ed.
that seems a very plausible explanation. that fabien programmed somehow fruit AND rybka and that we therefore have those similarities.

I think you misunderstood. He is suggesting that perhaps Vas paid Fabien to allow him to use some of the code in question.