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It appears that Zillions may not be up to the task of presenting this game. Here's a simple position example to demonstrate:

White - Kg4, Qd7
Black - Ke4, Pd5

White King is defended by its Queen and Black's King by its Pawn. So neither King can attack the other. White King is able to take Black Pawn since it maintains its Queen as a defender but Black King cannot take White Queen because then it is open to White King's attack.

White could simply win by taking Black Pawn with White King. But what if White makes the following move: Q-a4?

At first glance, this appears to leave White King un-defended. But White Queen continues its purpose because the Black King will be in threat if it attempts to take the White King. And the King is not permitted to move into threat.

So, Black is also mated in this position.

Zillions has difficulty in 'seeing' this potential.

I've noted that this form of play was presented by R. Wayne Schmittberger.

The Emperor King Chess Zillions implementation fails to 'see' the potential mating position stated in previous postings. So it actually needed a re-write.

And I've worked up an implementation which does. Hacked out a sub-routine which specifically looked for those potential defenders. Since this checked for sliders, I only let the engine check for Knights and Pawns with the 'attacked?' command. This greatly improved the performance of the implementation, increasing the Strength level to over 6 at 3 minutes. And this is best because the AI tends to go for the draw by stalemate(Q-c8) if run at Strength 2 or less.

The implementation includes both Emperor- and Amazon-style Mad King games.