Should you finesse or play for the drop? Missing the queen, the old rule is "eight ever, nine never": with eight cards between your hands, finesse; with nine, cash your top honors and hope the queen falls. Missing the king, the rule shifts by two: finesse with ten cards, play for the drop with eleven.
The rule is a summary of the odds, not a law. Once the auction or the play tells you something about the opponents' hands, the odds move, and the right play can move with them.
Why Nine Never and Eight Ever
With nine cards, the opponents hold four. The queen drops when they split 2-2, or when it is singleton: together about 53%. The finesse, after cashing one top honor to catch a singleton queen, wins about 51%. The drop is a little better.
With eight cards the opponents hold five, and the queen drops only if it is singleton or doubleton. The finesse is now clearly better. These are the chances to win every trick, computed exactly over every layout of the missing cards:
| Your cards | Missing | Need | Finesse | Drop |
|---|---|---|---|---|
| AKJ32 opposite 7654 (9) | Q 10 9 8 | 5 tricks | 51.4% | 53.1% |
| AKJ104 opposite 765 (8) | Q 9 8 3 2 | 5 tricks | 50.9% | 32.8% |
| AQJ1098 opposite 76543 (11) | K 2 | 6 tricks | 50.0% | 52.0% |
| AQJ109 opposite 87654 (10) | K 3 2 | 5 tricks | 50.0% | 26.0% |
In the nine-card case the gap is under two percent. That is why small clues decide it.
Rule of ThumbMissing the queen: eight ever, nine never. Missing the king: ten ever, eleven never. When you hold the two top honors, cash one before you finesse, in case the missing honor is singleton.
When to Break the Rule
The rule assumes you know nothing. You usually know something:
- The auction. If East opened with a weak two or a preempt, East has six or seven cards in one suit and fewer "empty places" for your queen. The queen is more likely with West. With nine cards, a preempt by East is often enough to make a finesse against West (playing West for the queen) the right play.
- The play so far. If West has shown out of a suit, East holds the rest of it, and West's remaining cards are more likely to include your queen. Count before you decide.
- Entries. A finesse needs you to lead from the right hand. If you cannot get there twice, cash the top honors.
- The danger hand. If losing the lead to East means a fatal switch, play the line that keeps East off lead, even at worse odds.
- Restricted choice. If an opponent drops an honor on the first round, the odds change sharply in favor of a finesse on the next round. See suit combinations.
- Scoring. At matchpoints, an extra trick matters on every board. At IMPs, the line that makes the contract matters more than the overtrick, which can turn a finesse into a safety play.
The suit break calculator shows how often each split happens, and the probabilities in bridge odds tables give the numbers behind the rule.
Practice: Finesse or Drop
You hold ♠AKJ104 in dummy opposite ♠765 in your hand. Spades are trumps and you need five spade tricks. The opponents have been silent. What is your plan?
Your hand:
BridgeDummy's suit combination puzzles are built for this: you play a single suit card by card against the best defense, and you see whether your line beats the odds. The Daily Suit Combos give everyone the same five puzzles each day. For the bigger picture, read the finesse.