STAKK CHESS

OBJECTIVE
Capture opponents King.

SETUP
Use a normal chessboard.
Each side has 1 King and 31 flat pawns.
Stack your pawns in your back 2 rows as follows:
1   1   1   1   1   1   1   1   
4   2   3   5   K   3   2   4
Pawns must be flat and stackable. 
Use checker pieces for pawns.

RULES
Players take turns moving.
On your turn move your King, one pawn, or one stack.
Moving onto an opponents stack or pawn captures all of those pawns.
A pawn or stack may move onto a friendly pawn or stack forming a bigger stack.
One or more pawns may be moved off a stack into the same space adjacent to the stack.
At least one pawn must remain from the original stack. 
Pawns moved this way may not capture or checkmate. 
A stack may be up to 5 pawns high.
Pawns & Kings move as in normal chess.
A stack of 2 may move as a knight.
You may only have two knights at a time.
A stack of 3 may move as a bishop.
You may only have two bishops at a time.
A stack of 4 may move as a rook. 
You may only have two rooks at a time.
A stack of 5 may move as a queen. 
You may only have one queen at a time.
Single pawns that reach the back row may move laterally on the back row 
one space. They may not capture.