A Royal Knight is a Knight that has the obligations of a King to move out of check, and you lose if it is checkmated.
Tip: Remember that it's illegal to move your King or Royal Knight a Knight's move away from any non-pawn piece.
Pretentious chess, by Adrian Alvarez de la Campa (2006)
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+Btw @Jeff K we'll need (real) SVG images for 8-pieces (not embedded PNG).
+Maybe starting from what I had https://github.com/yagu0/vchess/tree/master/client/public/images/pieces/Eightpieces/SVG_TODO - or based on the current design.
+...or maybe PNGs will work too (just larger base64-encoded image?)
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+https://www.chessvariants.com/rules/epic-chess
+Вадря Покштя / Vadrya Pokshtya