The chess board was set up in the small enclosed study. The two participants glared at each other over the board. Sherlock Holmes' long white hand extended over a single pawn and moved him forward two spaces. Professor James Moriarty's eyes lit up in recognition.

"Ah," he said. "you have used the Bird's opening. Quite good." His bony arm twitched slightly as it made a counter-move.

Holmes' mouth twisted into a slight grin. "But not good enough, I see."

The combatants glowered at each other for the briefest instant. As Holmes made his next move he remarked casually, "Do you think you can really win?"

Moriarty allowed himself a short, rasping laugh before he answered. "After you die, I'll be assured of it. You are the one obstacle I've encountered over and over. From that John Clay business, to the Scowerers nonsense. Yes, in a few short moves, I will hold London in checkmate." Holmes could not help but smile at the reference. "You see, of course, that I hold all the cards. Sebastian Moran, John Clay, infinite men and resources. While you have that puerile wastrel called Doctor Watson." the Prof. said, menace creeping into his voice. The smile faded from Holmes' mouth as the next move was made.

"Watson," he began, "is a much better human being than even I could ever be."

Moriarty sighed as he studied the board.

"You know, I almost hate to kill you. A mind is a terrible thing to waste."

Holmes raised a dark eyebrow. "And your mind isn't wasted?" he said archly.

Moriarty nodded. "Touche. I have now just realized something, Mr. Holmes. We are what is know in mathematics as interdependents. One cannot exist without the other. When I kill you, I will no longer be complete. A pity."

As Holmes looked down at the board, he said "Stalemate" in unison with Moriarty. Holmes laughed as it were a joke. "Amazing. Life imitates art, professor. As in all our other battles, this one ends with no clear winner. But I assure you. Our next battle will end quite differently."

Moriarty nodded. "Oh yes. Quite differently indeed."