With the help of the Hex-rays decompiler you can download the C-source code of Rybka 1.0 Beta and now with the Fruit source code left, the Rybka source code right decide yourself what was copied and what not.
The Hex-rays decompiler creates surprisingly well readable code extracted from the Rybka 1.0 executable or any other executable for that matter.
The bad news is that any program may become the target of hackers. I received decompiled versions of Hiarcs, Rybka 4 and others. Nobody is safe any longer.
Since publishing disassembled work of others is forbidden by EU law I asked Vas for permission to publish the Rybka 1.0 sources and he did not hesitate for one moment.
Fruit 2.1 The first atomic bomb of 2005, the open sources of Fruit 2.1
I have made a few annotations such as the start of EVAL and the start of PAWN_EVAL but what I really would like to see is a full annotated source code that either proofs or disproofs the alleged copy theft by some of the Fruit experts out here, which I am certainly not.
Also for another reason I am not the right person as I am much too biased in the between time.