Fibonacci Chess
(Sequence Chess)
By Stephen D. Costa
This is something I have recently come up with. The number of variants possible is virtually
infinite (see Variants section).
Fibonacci Chess is played on an 8x8 board just like regular chess, but the Fibonacci sequence
details times when opponents SWITCH moves. Moves made with an opponents' pieces must be legal.
Fibonacci sequence: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377...
So in a Fibonacci game, the player with the Black pieces makes White's first move; the player
with the White pieces makes Black's first move. This "switch" happens again on move 2, and so forth.
Any "switched" move must be played in the order it would be played in a normal game of chess.
The first ten moves, therefore, would be played as follows:
1. B W / 2. B W / 3. B W / 4. W B / 5. B W / 6. W B / 7. W B / 8. B W / 9. W B / 10. W B
VARIANTS
Variant #1 - One Switch: White and Black get to make each other's first move, but the rest of the game proceeds
like normal chess.
Variant #2 - Double Trouble: White and Black "switch" on Move 1. Then black gets to move both White and Black
move #2; White gets to move White and Black #3, and so forth. Each player then gets several chances to play
three consecutive moves, likely resulting in fast games. Each move must be legal.
The first ten moves would be played as follows:
1. B W / 2. B B / 3. W W / 4. W B / 5. B B / 6. W B / 7. W B / 8. W W / 9. W B / 10. W B
Variant #3 - Different Sequences: White and Black can agree on any switch sequence and either style of
switching off moves. For example, there could be switches every 5 moves, every 10 moves, every prime
number; use your imagination!
Variant #4 - No Forced Captures -- If you move your opponent's pieces on move N, you may not capture
them on move N+1 or any subsequent move N+M if all moves from move N through move N+M have given check
to your opponent (this is to prevent a forced move of a powerful piece into an "obvious" capture).
Variant #5 - Forced Captures - If making an opponent's move, you MUST capture one of your own pieces if
possible. If you cannot do so, you lose the ability to make that move for your opponent. For Variant 5a,
you lose your turn and your opponent makes no move; for Variant 5b, your opponent gets to make his own move.