The main objective of this chess variant is to combine some concepts of the game Diplomacy with chess.
The chess rules apply, with the following exceptions:
- Each move is done simultaneously by each player (write in a paper, use a third person, be honest...)
- Each move is executed if and only if, they do not conflict.
- Two pieces conflict if they want to go to the same position, and have equal ranks. If they have different ranks, the greatest rank takes the smaller one (consider K>Q>R>B=N>p).
- Two or more pieces conflict if they pass through some position at the same time (ranks are not important). Example:
- A King cannot move to a square that becomes in check. Example:
White plays Kb7 and Black plays Rh6: No problem! (if the rook didn't move, the king couldn't accomplish his move.)
White plays Qc4 and Black plays Kb3: The king cannot move! b3 is now in check because the black queen moved successfully to c4.
White plays Qc6 and Black plays Nc6: Queen takes kNight!
White plays Qd5 and Black plays c5: There is no conflict, because the two pieces don't meet in no square during their travel.
White plays Rh6 and Black do not move the d6 kNight: Rook cannot move, because there is an obstacle in its way (like in normal chess...)
In my opinion this rules are more interesting if we play a progressive type of game. Each player presents the entire set of movements. Then, they execute the first move for both players, then the second, and so on...
Now, each set of moves is done at the same time! But, in order to use them, we must introduce another conflict rule:
- There is a conflict between two pieces if and only if they can reach the conflict point, respecting conflict rules 1) 2) 3) and 4).
White plays Rh2 and Black plays Bd1 and Ba1: The a2 rook and the c3 bishop conflict at b2. So the a4 bishop can perform his move because the rook cannot reach square c3.
Conditional Moves (see Conditional Chess)
Include the possibility of making conditional moves. A conditional move is a move that only tries to execute, if same specific condition is true. A possible syntax could be: condition?if-true-move:if-false-move The condition can ask only one of the following questions:
- There is a specific piece at a specific square? eg, Nh6?e6:Qg2 "if there is a kNight in h6, then move e6, else move Qg2"
- There is some specific number of pieces still in the game? eg, 2Q?e4:Rd1 "if there is 2 queens in the game, then move e4, else move Rd1"
- Is a specific square empty? eg, ~e5?e5:exf6 "if e5 is empty, then move e5, else move exf6"
- Was my n-th move executed? (for progressive moves only) eg, 3?Ba3:Na3 "if my third move is executed, then move Ba3, else move Na3"
I thought on including support type moves, but I'm not sure if this put Dip-Chess rules too close to Diplomacy rules, and then I may get some problems with Avalon-Hill :) So, leave it as it is!
Other boards, other pieces...
These rules are easily transfered to many other chess variants.
I would like to try the Russian fortress variant (with progressive moves). It needs 4 players (and a master). Anyone?
Joao Pedro Neto (email removed contact us for address) fc.ul.pt
WWW page created: September 30, 1996. Last modified: February 28, 2001.