a chess program by Ulf Rathsman written in 6502 Assembly for the Commodore 64. Princhess played four World Microcomputer Chess Championships, the WMCCC 1980 in London, the WMCCC 1981 in Travemünde, becoming runner up, the WMCCC 1984 in Glasgow, where Princhess became tied champion, and the WMCCC 1985 in Amsterdam with a fourth place behind three Mephistos. After the success of Princhess in Travemünde, Rathsman became professional chess programmer and Princhess was incorporated into the dedicated Conchess computers   .
[Event "WMCCC 1981"] [Site "Travemünde, Germany"] [Date "1981.09.26"] [Round "6"] [White "Princhess 2.9"] [Black "Scisys X"] [Result "1-0"] 1.e4 e5 2.Nf3 Nc6 3.d4 Nf6 4.d5 Ne7 5.Nxe5 d6 6.Bb5+ c6 7.dxc6 Qa5+ 8.Nc3 bxc6 9.Nxc6 Qc7 10.Nxa7+ Bd7 11.Bxd7+ Qxd7 12.Be3 Rxa7 13.Bxa7 Qxa7 14.Qxd6 Qa8 15.Qe5 Nd7 16.Qb5 Nc6 17.Qg5 Nb4 18.Qd2 Bc5 19.O-O Nf6 20.Qg5 Bd4 21.Qb5+ Nc6 22.Ne2 O-O 23.c3 Bxf2+ 24.Rxf2 Nxe4 25.Rf3 Nd2 26.Rd3 Rb8 27.Qd5 Qa7+ 28.Kh1 Nb3 29.Rad1 Nbd4 30.Nxd4 Ne7 31.Qd6 Re8 32.Re1 Kf8 33.Nc6 Qc7 34.Qxc7 g6 35.Nxe7 Kg7 36.Qe5+ f6 37.Nf5+ gxf5 38.Rg3+ Kh6 39.Qxf6+ Kh5 40.Qg5# 1-0
- Ruggiero Rescuing Angelica, an illustration for Ludovico Ariosto's Orlando Furioso by Gustave Doré, Princess and dragon from Wikipedia
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- Karsten Bauermeister (1998). Die Geschichte der Conchess-Schachcomputer. Computerschach und Spiele, Heft 4, August-September 1998
- Travemünde 1981 - Chess - Round 6 - Game 2 (ICGA Tournaments)