REDU format ruling
King's Knight

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)When this card is Normal Summoned while you control "Queen's Knight": You can Special Summon 1 "Jack's Knight" from your Deck.
Rulings
- When "King’s Knight" is Normal Summoned, its Trigger Effect starts a chain if "Queen’s Knight" is on the field. If the opponent chains "Torrential Tribute" to destroy "King’s Knight" and "Queen’s Knight" you still Special Summon "Jack’s Knight".
- The effect of "King’s Knight" can only activate if it is Normal Summoned. Not if it is Flip Summoned, Special Summoned, or Set.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.