Backgammon Chess

Setup

You need chess board and backgammon board. Set up the boards as you do for these games normally.

Pieces

Stone: When a backgammon piece is on a chess board, it is called a stone (use "V" to represent in notation; "X" if doubled). It move as in checkers, without compulsory capture but you still must continue jumping while able to. If captured, it is placed in jail. Stones do not doubled on the last rank; instead, for purpose of stones movement on chess board it is considered the first rank is after the last rank.

Rules

On your turn you do:

1. Except for white player's first turn, play on backgammon board by rules of backgammon. (You can even do doubling and so on, just like in backgammon.)
2. Unless you thrown dice and had no legal move of backgammon on this turn, then you will make a move in chess game.
3. Opponent's turn is next.

Other rules:

• Backgammon stones bear off are placed on chess board at a vacant position of the player's choice. You can also place on top of one of your own single stones, to make it doubled.
• Stones captured in chess board go to jail in backgammon, they no longer count as bear off.
• If it is your turn in chess you have made a backgammon move, but you have no legal move and not in check, the game ends in a draw. But if you have no legal backgammon move either, then you pass your turn instead.
• There is no draw other than stalemate; other rules of draw in chess doesn't count.
• If you win in chess or backgammon, then you win the game, including doubling if any.
• If you are checkmated you lose even though opponent may not have a move of chess in next turn; rules of not moving into check and so on still applies, too.
• In some cases you may be able to make a chess move while opponent is in check. In this case, you win.

Notes

Variant called "Lag Backgammon Chess" may be played: In this game, each player sees his dice a certain number of turns in advance, which cannot be seen by your opponent until it is the actual turn to play those dice.