"Bishop versus pawns": "Bishop versus pawns",
"Board upside down": "Board upside down",
"Both sides of the mirror": "Both sides of the mirror",
+ "Build towers (v1)": "Build towers (v1)",
+ "Build towers (v2)": "Build towers (v2)",
"Burmese Chess": "Burmese Chess",
"Capablanca Chess": "Capablanca Chess",
"Capture all of a kind": "Capture all of a kind",