I have studied the evidence provided by Chen Zhixing on http://www.wulu.com/ and I consider that it is compelling. I am a professional programmer with expertise in x86 assembly language. Having to use the computer-go mailing list for this subject is unfortunate. But if the go community tolerates plagiarism, computer go as a whole is in danger. Jean-loup Gailly http://www.teaser.fr/~jlgailly/