• BakerBridge
• CONVENTIONS
• Takeout Double
• Blackwood
• Weak 2-Bid
• Strong 2-Club
• Stayman
• Negative Double
• Reverse Bid
• Gerber
• Jacoby Transfer
• Weak Jump Overcall
• Michaels Cue Bid
• Unusual Notrump
• Support Cue-bid
• Weak Jump Shift
• Help Suit Game Try
• Jacoby 2NT
• Splinter Bid
• RKC Blackwood
• Fourth Suit Forcing
• New Minor Forcing
• D.O.N.T.
• Reverse Drury
• Lebensohl
• 2 / 1 Game Force

One of the oldest bridge Conventions is Blackwood.

When you have determined that the partnership has enough combined strength to be in a slam contract you may still be worried about the possibility that the opponents have 2 Aces out against you. The Blackwood Convention allows you to ask partner how many Aces he holds.

A 4NT bid by you asks partner to respond according to the following:

• 5♣ : 0 or 4 Aces (if you can't tell which you shouldn't be asking)
• 5♦ : 1 Ace
• 5♥ : 2 Aces
• 5♠ : 3 Aces

If you find that your side holds all 4 of the Aces, you can then bid 5NT, asking for partner's Kings.
The responses will be similar, but at the 6-level.

• 6♣ : 0 or 4 Kings
• 6♦ : 1 King
• 6♥ : 2 Kings
• 6♠ : 3 Kings

A similar convention, Gerber, uses a 4♣ bid to start the sequence. The Gerber summary is a little further down the menu list.

A more complicated version of Blackwood, RKC Blackwood, is even further down the menu.

Combined Blackwood / Gerber lesson available.