Query Results for
SELECT * FROM `Item` LEFT JOIN `IndexEntry` USING (ItemID) WHERE `Type` = 'Problem' AND `IsHidden` = 0 AND `Item`.`IsDeleted` = 0 AND `Language` = 'English' AND (`InventorID` = 'KarenRobinson' OR `InventorID2` = 'KarenRobinson') ORDER BY `Type` ASC, `LinkText` ASC LIMIT 500 OFFSET 0
- Chess Contradance. Move pieces to the other side of the board without attacking each other. By Karen Robinson.
- Fast Chess Contradance. Solitaire chess puzzle: four white and four black pieces must change places without attacking. Author: Hans L. Bodlaender. Inventor: Karen Robinson.
- Queen's Quadrille. Chesslike form of the famous 15-16 puzzle. Author: Hans L. Bodlaender. Inventor: Karen Robinson.