Survo puzzles: www.survo.fi/puzzles --------------------------------------- Copyright (c) Survo Systems 2006-2011 The easiest way to solve these three problems may be using a Java Applet http://www.survo.fi/swap/puzzles.html based on the swapping method. Survo puzzle 258/2011 (830) #362-4054 A B C D E F 1 * 7 * * * * 26 2 * * * * * * 82 3 * * * * * * 63 22 37 41 27 33 11 Survo puzzle 259/2011 (720) #363-51172 A B C D E F 1 * * 16 * * * 91 2 * * * * * * 49 3 * * * * * * 31 15 25 34 21 40 36 Survo puzzle 260/2011 (1730) #363-81314 A B C D E F 1 * * * * * * 27 2 * * * * * * 63 3 * * * * * * 81 35 46 14 26 31 19