Squire Chess

Standard Chess Setup--except the king, queen and bishop pawns are squires.
All rules are the same as Chess except the following.
Squires may move in any forward direction and may make a two-square move on the first move, including diagonally. A squire reaching the last rank promotes normally.
Squires protected by knights may move as knights like in Knight Relay Chess
If a knight is captured one of the squires of the capturing side that is remaining on the board may be replaced with a knight on the same move, similar to promotion. If none remain the knight is removed and the move is finished.
Comments welcome..
talen314