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'''Colossus Draughts''' won the [[2nd Computer Olympiad#Checkers|2nd Computer Olympiad]] , [https://en.wikipedia.org/wiki/London London] 1990 in [[Checkers]] with [https://en.wikipedia.org/wiki/Chinook_%28draughts_player%29 Chinook] by [[Jonathan Schaeffer]] et al. competing as well. Colossus was well prepared, since Checkers expert Martin Bryant recognized a weak opening move by Chinook played against another program one round before - which nevertheless could not find the refutation and lost, and added the winning refutation inside Colossus' opening book <ref>[[Jonathan Schaeffer]] ('''1997'''). ''One Jump Ahead''. 11. I Feel Like a Teenager Again, pp. 174</ref>. Martin Bryant later accepted the offer to trade Colossus' huge opening book for Chinook's six-piece databases and therefore helped Chinook to become ''The World Man-Machine Checkers Champion'', and subsequently the offer to join the Chinook development team <ref>[[Jonathan Schaeffer]], [[Rob Lake]], [[Paul Lu]], [[Martin Bryant]] ('''1996'''). ''[https://www.aaai.org/ojs/index.php/aimagazine/article/view/1208 Chinook: The World Man-Machine Checkers Champion]''. [[AAAI#AIMAG|AI Magazine]], Vol. 17, No. 1</ref> <ref>[http://webdocs.cs.ualberta.ca/~chinook/authors/ Authors - Chinook - World Man-Machine Checkers Champion]</ref>. Martin Bryant about his win at the 2nd Computer Olympiad <ref>Martin Bryant, personal communication, August 2, 1996, published in [[Jonathan Schaeffer]] ('''1997'''). ''One Jump Ahead''. 11. I Feel Like a Teenager Again, pp. 175</ref>: [[Paul Lu|Paul]] was not playing against a group of old men who'd never seen a computer play in a competitive tournament before, but a "seasoned professional" of computer chess tournaments, where it is common practice to watch your opponents in early rounds hoping to catch them on a repeated mistake later. This has been documented to happen in computer chess tournaments so why shouldn't it happen in draughts? However, in Colossus' defense, even though I had "booked up" on the winning line, it may have been capable of finding the winning moves "across the board" anyway. After winning the game I thought to myself that it was remarkably stupid and arrogant (in the nicest possible way) of Jonathan and his team to enter a tournament with an operator who hardly knew the notation, let alone being able to recognize when his program had walked into and out of a loss! I had heard all these press "claims" by Jonathan that he'd beat the world champion in one year and solve the game in two! I had grown to love the game and knew that wasn't going to happen and so was very happy to "prove" to the world that the Chinook team still had a lot to learn about draughts.