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Sam Trenholme wrote on Mon, Jun 30, 2008 04:42 PM UTC:
To clarify Schoolbook's castling, five different types of castling are possible:
  • White's king moves to b1; White's queenside rook moves to c1. Black's king moves to b8; Black's queenside rook moves to c8.
  • White's king moves to c1; White's queenside rook moves to d1. Black's king moves to c8; Black's queenside rook moves to d8.
  • White's king moves to d1; White's queenside rook moves to e1. Black's king moves to d8; Black's queenside rook moves to e8.
  • White's king moves to h1; White's kingside rook moves to g1. Black's king moves to h8; Black's kingside rook moves to g8.
  • White's king moves to I1; White's kingside rook moves to h1. Black's king moves to I8; Black's kingside rook moves to h8.
This is the same castling used in Univers chess; a mirror reversed form of the same castling is used in Grotesque Chess and Landorean Chess.

While putting links here, here are some other 8x10 starting arrays: Aberg's variation and Paulovich's variation, and, of course, this exhaustive list.

- Sam


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