National Lampoon's Chess Maniac 5 Billion and 1

National Lampoon's Chess Maniac 5 Billion and 1 is a humorous chess game developed and published by Spectrum Holobyte for DOS PCs in 1993.

*The title of the game as shown in this ad was changed before its release due to concerns of legal reprisal for the title being too similar to Ubisoft's Chessmaster series.  I guess they might be willing to shoot a dog in the head, but they aren't so crazy as to expect a French publishing giant to have a sense of humor about it.