Items Invented by Robert Abbott
- Baroque/Ultima. Game where each type of piece has a different capturing ability. (8x8, Cells: 64) (Recognized!) Author: Hans L. Bodlaender and Fergus Duniho. Inventor: Robert Abbott.
- Ultima. Robert Abbott's Ultima page. By Robert Abbott.
- Baroque Chess. Java applet that plays the game. Author: Jesse Plymale. Inventor: Robert Abbott.
- Ultima. Popular game using the same units, with one rook upside-down. Author: Ed Friedlander. Inventor: Robert Abbott.
- Ultima. Game where each type of piece has a different capturing ability. (Recognized!) Author: Fergus Duniho. Inventor: Robert Abbott.
- Chameleon (1). Take a piece in the way that piece is taking. Author: Ben Good. Inventor: Robert Abbott.
- Coordinator. Takes in `coordination' with king. Author: Ben Good. Inventor: Robert Abbott.
- Immobilizer. Pieces standing near an immobilizer may not move. Author: Ben Good. Inventor: Robert Abbott.
- Long Leaper. Moves as queen, but takes by leaping. Author: Ben Good. Inventor: Robert Abbott.
- Pincer Pawn. Moves as rook, and takes by enclosing. Author: Ben Good. Inventor: Robert Abbott.
- Withdrawer. Takes by moving away. Author: Ben Good. Inventor: Robert Abbott.
- Ultima Problem #3. The 3rd in a series of Ultima puzzles. By Robert Abbott.
- Ultima Problem #9. The 9th in a series of Ultima puzzles. By Robert Abbott.
- Abbott's New Card Games (book information). Information on a book describing Ultima, and eight card games. By Robert Abbott.
- Ultima . Version using Alfaerie graphics. Author: David Howe. Inventor: Robert Abbott.
- Ultima with Alternate Graphics . Game where each type of piece has a different capturing ability. Author: David Howe. Inventor: Robert Abbott.