This question is about the old game called 'War of the Ring', released by SPI in 1977, not the later game that shares the same name. I did not include that tag, which is meant for the other game.
The game can be 2 or 3 players. In a 2 player game Sauron and Saruman are controlled by the same player, in a three players they are played by separate people. The rules for victory conditions in the 3 player game are noted below.
Dark Power Player. To win the game, the Dark Power Player must have the Ring brought to the Barad-Dur hex. Or he may win a military victory by controlling the citadels of Barad-Dur, Durthang, Minas Morgul, Dol Guldur, Minas Tirith, Dol Amroth, Helms Deep and Isengard, plus the hexes containing Hobbiton and Thranduil's Palace.
Fellowship Player. The Fellowship player must destroy the Ring to win the game.
Saruman Player. The Saruman Player must control all existing Nazgul, plus the citadels of Isengard and Helms Deep and the town of Edoras.
Note: that if either Aragorn or Gandalf becomes a semi-ringwraith, the Dark Power Player wins automatically, unless the Saruman player has worn the Ring and is still in existence, in which case the Saruman player wins.
More than one player may win the Three-Player Game, but it is unlikely that this will occur.
This question is about the last line, I saw the question asked on another forum, where no one could figure how it could happen and I don't see it either, but I also don't have a lot of experience with the game (one person guessed it may have been that the rules went through a number of last minute revisions, that this was going to be possible but they removed the method and forgot to remove this line at the same time).
I'm asking in case something was missed that I/they could not see, or if there was some known rule revision that would confirm the other person's guess.