Diamond Chess, the Berlin variant is almost like "normal" Chess, but the board is turned by 45° (white squares at the players side). The pieces are placed in the opposing corners, like shown in the illustration.
Players can't just reel off their trained openings, engines are useless.
The positioning of the board gives space for drinks and ashtray left and right of the players corner - very handy sitting at smaller bar-tables.

@diamondchess Are there adaptations for promotions, rook, pawns first move (and en passant rule)?

Hey, did you see my other posts ? There are the rules (english/german). Pawns are moving 1 field and forward (no enpassant) , no castelling, pawns get promoted when they reach the other side.

@diamondchess I did not see those post, sorry! Thanks, I'm going to check them out!

@diamondchess do the pieces move according to traditional rules, ie. can white pawn open with taking the black pawn?

Hey, did you see my other posts ? there are the rules in short. 🙂. The pawns can only move 1 field forward, there's no enpassant either. And no castelling.

@diamondchess ha, thank you! the other posts hadn't federated here, so i missed them. I'll go to your profile to look at them now. :)

@realitygaps hey , it’s intended to be that , that’s why we kept the name . There are 2 differences though. If you look at my other posts, the line up has the bishop and the horse reversed. Also, there is the shot rule.

@diamondchess you're right, I found explanations in your timeline :)
A fun idea though. It could be convenient to pin a post with all the rules or link to the rules.

@dudenas yeah, i tried but the rules are too long for one post.

The pawns move towards the opponent , straight from one diamond ♦️ shaped field to the next . Capturing forward/left or forward/right .
The full rules are in previous posts.

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