Survo puzzles: www.survo.fi/puzzles --------------------------------------- Copyright (c) Survo Systems 2006-2009 The easiest way to solve two last problems may be using a Java Applet http://www.survo.fi/swap/puzzles.html based on the swapping method. Survo puzzle 165/2009 (1200) A B C D 1 * * * * 49 2 * * * * 23 3 * * * * 34 4 * * * * 30 40 52 10 34 Survo puzzle 166/2009 (450) #442-28450 A B C D 1 5 * * * 14 2 * * * * 45 3 * * * * 55 4 * * * * 22 43 29 24 40 Survo puzzle 167/2009 (350) #443-35562 A B C D 1 9 * * * 27 2 * * * * 54 3 * * * * 44 4 * * * * 11 40 43 30 23