Rutherford's 1-dimensional Shogi is played on a linear field of seventeen cells. 
All pieces, except for the King, promote or demote when performing captures.

PAWN[P] steps one forward. Promotes to GO-BETWEEN.
GO-BETWEEN[GB] steps one forward or one backward.  Demotes to GO-BETWEEN.
SILVER[S] steps one forward, leaps to the second forward or backward.  Promotes to GOLD.
GOLD[S] steps one forard or backward, leaps to the second forward.  Demotes to SILVER.
KNIGHT[N] steps one forward, leaps to the third forward.  Promotes to PHOENIX.
PHOENIX[Ph] leaps to the second or third forward or backward.  Demotes to KNIGHT.
BISHOP[B] can make up to four leaps to the second forward or backward, if each consecutive touched cell is vacant.  Promotes to CANNON.
CANNON[C] slides up to eight vacant cells forward or backward.  May capture a piece up to eight cells forward or backward away using a screen.  Demotes to BISHOP.
LANCE[L] slides up to eight cells forward. Promotes to REVERSE CHARIOT.
REVERSE CHARIOT[RC] slides up to four cells forward or backward.  Demotes to LANCE.
KING[K] step one forward or leaps to the second forward.

Captures become the property of the captor and can be introduced to the playing field as a move on subsequent turns under the following conditions:

1. They may not be place behind the friendly KING.
2. They must dropped at least two cells from a friendly KING.
3. They may check the opponent KING, but not mate.
4. They may be dropped with either of their value.
5. PAWN, LANCE and KNIGHT can be dropped on the last cell. KNIGHT can be dropped on the second to last cell.

The game is won by checkmating the opposing KING.