Synchronous Chess

@7Deadknight  I wrote up the game you suggested call Ven Chess its on Chess variant https://www.chessvariants.com/diffmove.dir/ven_chess/ven.html

The element where crossing of pieces is blocked adds to the game play.

Hi...I thought of this idea today with many similarities but some differences to everything that's been posted on here. Still trying to hash out a few things, however...

https://www.reddit.com/r/chess/comments/rdf9dy/i_introduce_the_new_game_unknown_chess/

how is that a good example? There's no confusion here. Both pieces move simultaneously, so in that case, a capture doesn't take place. If you want you can even animate this out by hand. One hand on the capturing piece, the other on the in-danger-of-capture piece, then move both simultaneously, and as long as the in-danger-of-capture piece makes a legal move, it won't be captured. It is captured, however, if it doesn't make a legal move or it doesn't move.

I thought of this simultaneous/synchronous chess in the shower just now as well (hence looking it up now). I think it's a great idea. It would be a fun variant. It's like a discrete sampling of a real-life battle. Each player gets, say, 10 seconds per move (or make no move at all). Each players move (or lack of) is revealed at the end of the 10 seconds. Then 10 seconds to make next move etc. If you make an illegal move in that 10 seconds, then that move is cancelled and you essentially made no move. A player loses when their king is captured. A game can also end in stalemate when a player has no legal moves.

Hello i've made a variant thats called sync chess where its specifically like this where both players move at the same time you can play with a friend at syncchess.com im still working on the development but feel free to try it out and lmk

Is synchronous chess online

Someone play against me at 7 pm tonight on syncchess.com

Let's test it out!

Hi everyone,

I'd like to share a chess variant I've developed called SyncChess that introduces a fundamental change to how chess is played. I'm a first-year college student, and this has been my passion project for the past few months.

What makes SyncChess different?

In SyncChess, both players submit their moves simultaneously instead of taking turns. This creates an entirely new strategic dimension where predicting your opponent's move becomes just as important as calculating your own. Think of it as combining chess with rock-paper-scissors elements!

Core Rules:

1. Simultaneous Moves: Both players choose and submit their moves at the same time. The board only updates after both players have submitted.
2. No Consecutive Moves With Same Piece: You cannot move the same piece in consecutive rounds (with an exception for kings in check or when no other legal moves are available).
3. "Swerving" Rule: If you attempt to capture an enemy piece, but that piece moves away in the same round, no capture occurs.
4. Collision Rule: If two pieces try to move to the same square simultaneously, both are removed from the board.
5. Check & Checkmate: Kings can end up in check due to simultaneous moves. A checkmate ends the game immediately, even if the delivering player's king is also in check. If both players deliver checkmate simultaneously, the game is drawn.

New Feature: Online Matchmaking

I've just implemented online matchmaking at syncchess.com, so you can now play against random opponents without having to invite a friend. The site also supports friend invites if you prefer.

Tutorial Video

For those who want to see the rules in action, I've created a short tutorial: https://youtu.be/-Gs7gEG61fk?si=fdhY3MSzlgUS4c5n

Why I Think It's Interesting

SyncChess creates fascinating tactical situations that don't exist in regular chess. For example:

• Sacrifices become more unpredictable when your opponent can move the piece you're targeting
• Setting up multiple threats is more powerful since your opponent can only respond to one
• The inability to move the same piece twice creates interesting mobility constraints
• Mind games and player psychology play a much bigger role

I'd love to hear your thoughts if you give it a try! I'm especially interested in feedback from experienced chess players about the strategic depth and balance.

Thanks for your time