| #19701 | EchoNWERC 2000SWERC 2000 | |
| #19702 | Fold-up PatternsNWERC 2000SWERC 2000 | |
| #19703 | AreaNWERC 2001 | |
| #19704 | Ambiguous DatesNWERC 2001 | |
| #19705 | CubeNWERC 2001 | |
| #19706 | EnigmaNWERC 2001 | |
| #19707 | GridlandNWERC 2001 | |
| #19708 | T9NWERC 2001 | |
| #19709 | Number GameNWERC 2001 | |
| #19710 | Signal BoxNWERC 2001 | |
| #19711 | Euro EfficiencyNWERC 2002 | |
| #19712 | Markov TrainsNWERC 2002 | |
| #19713 | Hansel and GrethelNWERC 2002 | |
| #19714 | FloorsNWERC 2002 | |
| #19715 | The PicnicNWERC 2002 | |
| #19716 | PearlsNWERC 2002 | |
| #19717 | Huffman TreesNWERC 2002 | |
| #19718 | InputNWERC 2002 | |
| #19719 | Bridging signalsNWERC 2003 | |
| #19720 | Vase collectionNWERC 2003 | |
| #19721 | GladiatorsNWERC 2003 | |
| #19722 | Who's the boss?NWERC 2003 | |
| #19723 | Subway tree systemsNWERC 2003 | |
| #19724 | Prison rearrangementNWERC 2003 | |
| #19725 | Sightseeing tourNWERC 2003 | |
| #19726 | A number gameNWERC 2003 | |
| #19727 | Word EncodingNWERC 2004 | |
| #19728 | WatchdogNWERC 2004 | |
| #19729 | Taxi Cab SchemeNWERC 2004 | |
| #19730 | Pseudo-random NumbersNWERC 2004 | |
| #19731 | Card Game CheaterNWERC 2004 | |
| #19732 | InvestmentNWERC 2004 | |
| #19733 | PipesNWERC 2004 | |
| #19734 | SETINWERC 2004 | |
| #19735 | Minimax TriangulationNWERC 2004 | |
| #19736 | Unequalled ConsumptionNWERC 2005 | |
| #19737 | Declaration of ContentNWERC 2005 | |
| #19738 | LaserboxNWERC 2005 | |
| #19739 | BowlstackNWERC 2005 | |
| #19740 | Pesky HeroesNWERC 2005 | |
| #19741 | Reduced ID NumbersNWERC 2005 | |
| #19742 | TantrixNWERC 2005 | |
| #19743 | Guardian of DecencyNWERC 2005 | |
| #19744 | Up the StairsNWERC 2005 | |
| #19745 | SudokuNWERC 2006 | |
| #19746 | The SetStack ComputerNWERC 2006 | |
| #19747 | PieNWERC 2006 | |
| #19748 | Ticket to RideNWERC 2006 | |
| #19749 | The BookcaseNWERC 2006 | |
| #19750 | Printer QueueNWERC 2006 | |
| #19751 | Prime PathNWERC 2006 | |
| #19752 | Lineland's AirportNWERC 2006 | |
| #19753 | Leonardo's NotebookNWERC 2006 | |
| #19754 | IntersectionSWERC 1995 | |
| #19755 | Synchronous DesignSWERC 1995 | |
| #19756 | Graph ColoringSWERC 1995 | |
| #19757 | TriangleSWERC 1995 | |
| #19758 | AnagramSWERC 1995 | |
| #19759 | SpreadsheetSWERC 1995 | |
| #19760 | CubeSWERC 1995 | |
| #19761 | Peter's CalculatorSWERC 1995 | |
| #19762 | Partial Differential EquationsSWERC 1995 | |
| #19763 | StarsSWERC 1996 | |
| #19764 | HexagonSWERC 1996 | |
| #19765 | Domino EffectSWERC 1996 | |
| #19766 | PendulumSWERC 1996 | |
| #19767 | BorderSWERC 1996 | |
| #19768 | The New VillaSWERC 1996 | |
| #19769 | ShipsSWERC 1996 | |
| #19770 | Jury CompromiseSWERC 1996 | |
| #19771 | TrianglesSWERC 1997 | |
| #19772 | Instant ComplexitySWERC 1997 | |
| #19773 | There's Treasure Everywhere!SWERC 1997 | |
| #19774 | Video SurveillanceSWERC 1997 | |
| #19775 | Pushing BoxesSWERC 1997 | |
| #19776 | Always on the RunSWERC 1997 | |
| #19777 | Box of BricksSWERC 1997 | |
| #19778 | Island of LogicSWERC 1997 | |
| #19779 | MBoneSWERC 1997 | |
| #19780 | Optimal ProgramsSWERC 1998 | |
| #19781 | It's not a Bug, it's a Feature!SWERC 1998 | |
| #19782 | ReflectionsSWERC 1998 | |
| #19783 | Going in Circles on Alpha CentauriSWERC 1998 | |
| #19784 | Blowing FusesSWERC 1998 | |
| #19785 | Fast FoodSWERC 1998 | |
| #19786 | Sorting SlidesSWERC 1998 | |
| #19787 | Single-Player GamesSWERC 1998 | |
| #19788 | Date BugsSWERC 1999 | |
| #19789 | The Archeologists' DilemmaSWERC 1999 | |
| #19790 | The Vindictive CoachSWERC 1999 | |
| #19791 | Triple Ties: The Organizer's NightmareSWERC 1999 | |
| #19792 | Colour HashSWERC 1999 | |
| #19793 | MazeSWERC 1999 | |
| #19794 | LC-DisplaySWERC 1999 | |
| #19795 | RobberySWERC 1999 | |
| #19796 | The Die Is CastSWERC 1998 | |