CHICKEN CHESS

Initially white has no king and two queens.
The goal is for white to capture the king, black to prevent this.
Otherwise FIDE rules; castling permitted whenever neither piece has moved.

All moves (alternating) go to black in the first phase.
Any player, may optionally, on his move, take the black army and pass.
Then the other player moves with White and regular play begins.

Sample

1. e5,Nf6,Bb4,0-0,B;d2,B;e1,B;f2,J takes black
2. Nf3    Re8
3. e4     N;e4
4. Qd5    Nd6
5. Bg5    Re7
6. B;e7   Q;e7
7. N;e5   Nc6
8. Ng4    Bb6
9. Bd3    Nb4
10 Qh5    N;d3
11 c;d3   h6
12 Nc3    Qg5
13 Q;g5   h;g5
14 h4     g;h4
15 R;h4   Bd4

r . b . . . k .
p p p p . p p .
. . . n . . . .
. . . . . . . .
. . . b . . N R
. . N O . . . .
O O . . . . O .
R . . . . . . .

In this moment, Black tries to swap as many material as he can, so that White could not have enough force, at endgame, to checkmate the black King.