Question: My partners and I play Minorwood. It is sometimes confusing when 4of a minor is just invitational vs Keycard asking with the exception if an auction that began with an inverted minors bid.

Answer: I would suggest that you play Redwood instead of Minorwood and it will clear up all of your confusion. REDWOOD

When the minor has been bid and raised – then a jump to one over – a red suit in all case (why it gets its name) is RKC and 4 of the minor is either invitational or a slam try depending on the auction but it is never RKC.

1♣ – 2♣ – 4♦
1♦ – 2♦ – 4♥

One over the agreed minor.

1♠ – 2♣ – 3♣ – 4♦
1♠ – 2♦ – 3♦ – 4♥

If you would rather not play redwood – then make very specific agreements about Minorwood – The suit must be bid and raised – and there must be a jump to four of the minor.  This means that you will make this bid in only about 2-3 auctions which you can write out in your notes.  All other times it is a natural bid and either invitational or slam try depending on the auction.