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When learning from Black's mistakes in this game, the fifth and sixth positions shown out of eleven are the same. Showing the same position twice is redundant. https://lichess.org/pf0ypwxu/black

I use the Alpha style.

#3 Is castling allowed? Can pawns promote to king? Is it allowed to move a piece on the first move, then move it back on the second in such a way that the position is unchanged? The last rule about en…

Calendar Chess: 1. The rules are as in normal chess except as noted. 2. The initial board and setup are in an image link at the bottom of this post. .......a. The board wraps around as a calendar does…

The idea is to allow the community to playtest your variants and give suggestions.

This is a Crazyhouse problem that highlights one of lichess's shortcomings regarding the variant. Specifically, you can't tell the difference between a real queen and a promoted pawn until you capture…

This is a simple one I composed to show that stalemate is useful sometimes. https://lichess.org/study/ve5rVLea/tm6EvA17#0

When learning from Black's mistakes in this game, the service is inconsistent on the sixth bad move out of eleven. I tried 21... Bxb3, and it says I can do better. I tried 21... Bxb3 again, and it say…

https://lichess.org/study/0falmtJt/cbouNPDc#0