I've seen it somewhere before. but i can't remember where
Knightmate Chessboard
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If you’d like to add this variant, the best way would be to join the Custom Variants group, do 10 test games, and submit it there.
How can I submit variant?
I am pretty sure that you can recreate knightmate chess by making the knight the royal piece in custom variants. I am not sure if the knight can castle though even if it's a royal piece.
Green_Sleeves wrote:
If you’d like to add this variant, the best way would be to join the Custom Variants group, do 10 test games, and submit it there.
We ARE in the group XD
Chess variant where the role of the king and knight is exchanged: players win by checkmating the knight, and the kings are regular pieces subject to capture.
Royal knight: Starts on the field of the king. It moves like a knight, but the check-rule applies to it like to a king: it cannot move into check, it has to move out from check, and if it cannot escape from check, it is an immediate loss of the game (checkmate).
Commoner: They start on the fields of the knights. They move like the king, but the check-rule does not apply to them, i.e. they can be captured like any other piece.
Otherwise the rules of chess apply, with the following differences:
Basic mates
The following table shows which pieces or piece combinations can checkmate the lone knight.
The queen can checkmate the knight on its own, but neither of the other pieces can (not even with the support of the knight). However, any two pieces (besides the knight) can checkmate (except the very rare case of two bishops on the same field colour).
Knight: Draw
Knight Queen: Win
Knight Rook: Draw
Knight Commoner: Draw
Knight Bishop: Draw
Knight RR: Win
Knight RC (Rook, Commoner): Win
Knight CC: Win
Knight RB: Win
Knight CB: Win
Knight BB: Win
Examples of checkmated knight