The Rules of Cypher Chess

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V. The King (cont.).

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e. In Court, the King cannot be attacked by pieces other than the Spy. 

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f. Unlike classical chess, c-chess allows the Kings to stand next to each other, depending on where they are situated on the board.

   If you find this idea confusing, remember the following general rule: when each King can check the other, they must always be at least one square apart.

   Like other major pieces, the King can attack pawns and major pieces in the Field FROM the Border as well as capture pawns that stand NEXT to him on the Border, but unlike the other major pieces, he is vulnerable to attack by opposing major pieces on the Border. For example a rook or queen can check the Border-King from a Border square. 

​   For this reason, two Border Kings cannot stand next to each other, since an attack would result in check. However two Field Kings can stand next to each other (neither puts the other in check). If a Court or Border King steps next to a Field King, the former puts the latter into check, and a Court King can do the same to a Border King.

 

For King scenarios, see illus-trations.) 

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g. The King can capture a pawn on the Border; like the other pieces, it can capture pawns in the Field as well. 

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h. The King can attack and cap-ture a major piece in the Field when setting out from either a Court or Border square.

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i. On the Border, the King cannot capture a piece that is putting it in check from another Border square. (In the Field, in the case of col-

lusion (as in standard chess), the King can capture a piece which is putting it into check, as long as doing so does not put it into yet another check. See below.)​

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​See Table of possible attacking moves.