+ "Get strong at self-mate": "Get strong at self-mate",
+ "Give three checks": "Give three checks",
+ "Keep antiking in check (v1)": "Keep antiking in check (v1)",
+ "Keep antiking in check (v2)": "Keep antiking in check (v2)",
+ "Kings cross the 8x8 board": "Kings cross the 8x8 board",
+ "Kings cross the 11x11 board": "Kings cross the 11x11 board",
+ "Landing on the board": "Landing on the board",