TKO was a fast-paced 1989 quizzer hosted by Peter Tomarken, and an "interesting little game" according to Game Show Pilot Light.
The Light knows what it's talking about. TKO obviously rips off Jeopardy to some extent, but with enough twists to make it a worthy quizzer in its own right. The first couple rounds have a three by five board of questions. The contestants get three possible answers for each question, only in the form of initials (see the screenshot). They have to pick the right set of initials and then call out the full phrase. TKO is a group of initials itself, get it?
There's a kicker called a "knockout question," where a correctly answering contestant gets to knock off the dollar value from one of the competing contestants' totals. In the final round, this becomes pretty much the whole game, as every question is a knockout. The idea is to whittle away your competitors' stashes while keeping some loot yourself. The final survivor gets whatever dollars are left plus five grand.
Tomarken runs the game with his expected competence, and the pace never flags. It's pretty much the Jeopardy approach - keep the questions coming fast enough to tie down the viewer's attention.
Hard to say why this entertaining quizzer never got to air. The Light speculates that the game show market was just too glutted in 1989. That's possible, though the ruthless nature of TKO's competition might have scared off some execs. At least on Jeopardy the contestants don't knock down each other's cash totals. But TKO still deserved a chance, in my not so humble game show opinion.