From Don.Woods@eng.sun.com Sun Jan 2 20:10:16 1994 Return-Path: Received: from Sun.COM by life.ai.mit.edu (4.1/AI-4.10) for /com/archive/cube-lovers id AA12259; Sun, 2 Jan 94 20:10:16 EST Received: from Eng.Sun.COM (zigzag.Eng.Sun.COM) by Sun.COM (4.1/SMI-4.1) id AA11819; Sun, 2 Jan 94 17:10:12 PST Received: from colossal.Eng.Sun.COM by Eng.Sun.COM (4.1/SMI-4.1) id AA03228; Sun, 2 Jan 94 17:08:39 PST Received: by colossal.Eng.Sun.COM (5.0/SMI-SVR4) id AA13229; Sun, 2 Jan 94 17:10:24 PST Date: Sun, 2 Jan 94 17:10:24 PST From: Don.Woods@eng.sun.com (Don Woods) Message-Id: <9401030110.AA13229@colossal.Eng.Sun.COM> To: cube-lovers@ai.mit.edu Subject: 10x10 Tangle Content-Length: 1000 Hm. Well, I split up the 10x10 Tangle exhaustive search and ran it on several machines over Christmas break, getting the 90 days of compute time done in about 10. And turned up no solutions. There could of course be a bug in my program, but the same code with minor changes finds the same solutions as others have found for the 5x5. I also tried adding some extra tiles for the 10x10, and it began finding solutions okay. I did doublecheck that the 100 tiles matched the info posted to Cube-Lovers re which tiles are duplicated in the four 5x5s; I have no way of checking whether that info was correct. Has anyone out there ever heard definitely that someone has found a solution to the 10x10? Is it possible that the makers of Tangle (Matchbox, using Rubik's name under license) merely claimed that such a solution exists, without actually verifying it? (Seems pretty sleazy if so, but then, having Tangles 2-4 be merely color permutations of #1 is pretty weak in the first place.) -- Don.