What you will learn
Small cards carry the message.
Big cards take the tricks.
Three questions sort most signals. Who led this suit? Does partner already know what I think of it? Which suit do I want next? The answers pick attitude, count or suit preference. Then the size of the card carries the message: upside-down for attitude and count, high for the higher suit in suit preference.
01 / Which signal, whenAttitude, count or suit preference.
Partner leads a suit: show attitude. Declarer or dummy leads it: show count. Partner already knows both, or you are giving partner a ruff: show suit preference. We spend the first part of the workshop on this rule, because the rest of the workshop builds on it.
02 / Upside-down attitudeLow says yes.
When partner leads, a low card encourages and a high card discourages. Your lowest card does the encouraging, so you do not spend a jack or a ten to say "keep going".
03 / Upside-down countHigh-low is odd.
When declarer leads, play up the line with an even number and high-low with an odd number. We work through how partner adds up the suit from dummy, your signal and the bidding, and when that count tells partner to hold up the ace and when to take it.
04 / Present countCount what you hold now.
The second time a suit is played, and on your later discards, show the cards left in your hand rather than the number you started with. Same upside-down rule, new number.
05 / Suit preference, including trumpsWhich suit do you want next?
When attitude and count are already known, the size of your card points to a suit: high for the higher-ranking side suit, low for the lower. We cover the card you lead for partner's ruff, the card you return, and trump suit preference, where the order you play your trumps points partner to the side suit you want.
06 / Coded 9s and 10sA lead that counts the cards above it.
Lead a 10 or a 9 and partner knows one of two things is true: you hold no card higher than it, or exactly two. The 10 from A J 10 x or from 10 9 x, the 9 from K 10 9 x or from 9 8 x, and partner works out which from dummy and their own hand. The jack denies a higher card. We cover the opening lead and the new suit you lead in the middle of the hand.
07 / Bonus: Reverse SmithA notrump signal about the suit partner led.
Against notrump, your card in the first suit declarer plays can tell partner whether to come back to the opening lead. We finish the workshop with Reverse Smith, the version where your low card says "come back".
Agreements belong on your convention card. Mark Upside-Down under Defensive Carding, note Coded 9s and 10s beside your leads, and your opponents are told when they ask.