+ "Mandatory captures": "Mandatory captures",
+ "Mate any piece (v1)": "Mate any piece (v1)",
+ "Mate any piece (v2)": "Mate any piece (v2)",
+ "Mate the knight": "Mate the knight",
+ "Middle battle": "Middle battle",
+ "Mongolian Horde": "Mongolian Horde",
+ "Move like a knight (v1)": "Move like a knight (v1)",
+ "Move like a knight (v2)": "Move like a knight (v2)",
+ "Neverending rows": "Neverending rows",
+ "No-check mode": "No-check mode",
+ "Occupy the enemy palace": "Occupy the enemy palace",