Overcalls in Bridge

A simple overcall is a bid of a new suit at the cheapest level, with no jump. At the one level it shows about 8 to 16 high-card points and five or more cards in the suit. That range is wider than an opening bid at both ends. It goes lower because you have a long suit and partner may need a lead, and it stops at 16 because stronger hands double first and then bid the suit.

The suit matters more than the points. KQJ95 and 9 points is a fine overcall of 1♦, because partner will be glad to lead a spade and you have a source of tricks if your side declares. Q7432 and 12 points is a doubtful one. If partner leads from Kx in that suit, the overcall has cost a trick before declarer has done anything.

Vulnerability shifts the bottom of the range. Not vulnerable against vulnerable opponents, many players overcall at the one level with 7 points and a strong suit such as AK1098. Vulnerable against not vulnerable, a light overcall that gets doubled can cost 500 or 800, so the hand should be closer to an opening bid.

A four-card overcall at the one level is legal and occasionally right, with a suit such as AKJ10 and a hand that has no other bid. Most partnerships treat it as rare enough that partner raises on the assumption of five.

Once the bid has to go to the two level, the requirements go up. Over 1♠, a heart, diamond or club overcall is a two-level bid, and the opponents have more room to double it for penalty and more reason to. A two-level overcall shows about 11 to 16 points, close to an opening hand, and either a good five-card suit or a six-card suit.

The same 12 points can be a clear overcall in one auction and a clear pass in another. Over 1♣, a hand with AQ1094 in spades overcalls 1♠ without a second thought. Over 1♠, a hand with K8653 in hearts should usually pass. The suit is too thin to play opposite a short holding, and it is not a suit you want partner to lead.

The two-level overcall is constructive. Partner can play you for a sound hand and a real suit, and can raise or bid game on less than a one-level overcall would need.

Ron Klinger's suit quality test turns "a good suit" into a number. Add the number of cards in the suit to the number of honors it holds, counting the ace, king, queen, jack and ten. The jack and ten count only when the suit also holds the ace, king or queen. The total should be at least the number of tricks your bid contracts for, seven at the one level and eight at the two level.

The test is a guide, and it is strictest where it helps most, at the two level and on light hands. At the one level with a sound opening hand, most players will still overcall a suit like K9632 rather than pass, because the alternative is to stay silent with 13 points. At the two level, take the test seriously. Bad suits doubled at the two level are where overcalls lose the most.

A direct overcall of 1NT shows the same kind of hand as a 1NT opening, balanced with about 15 to 18 points, a little wider at the top than a 15 to 17 opening. It also promises a stopper in the suit opened, such as A, Kx or Qxx, because that suit is the one the defense will lead against you.

Most partnerships play the same responses as over their own 1NT opening, so Stayman and Jacoby transfers apply after (1♥) 1NT (Pass). Agreements vary on the details, for example whether a cue bid of the opener's suit replaces Stayman, so settle them before the session.

In the balancing seat, after 1♥ - Pass - Pass, a 1NT overcall is weaker. A common range is about 11 to 14, because partner's pass over 1♥ may hide a fair hand. Strong balanced hands in that seat double first and bid notrump next.

A jump overcall skips a level, as in (1♦) 2♠ or (1♣) 2♥. In modern Standard American it is weak, the competitive cousin of a weak two bid: a good six-card suit and about 5 to 10 points. It takes away the opponents' one-level bids and gives partner an accurate picture for the lead and for any sacrifice.

A double jump, such as (1♦) 3♠, shows a seven-card suit and a weak hand, the same hand you would open with a three-level preempt. Over a 1♣ or 1♦ opening a 2♥ or 2♠ jump overcall is the common case. Vulnerable, the suit should be strong enough to play opposite a void.

The jump is not a strong bid. A six-card suit with an opening hand overcalls at the cheapest level, and a hand of 17 or more starts with a double. Some older partnerships play intermediate jump overcalls, about 11 to 15 points with a good six-card suit, and a few play strong ones. If you play either, it has to be on the convention card.

The partner of the overcaller is called the advancer. The first question is support. A fit for partner's suit gets shown at once, and the strength of the raise decides which bid to use.

The cue bid of the opener's suit is the key to the structure. Because every good raise starts with 2♥, the direct jump to 3♠ is free to be preemptive, the bid you make with four trumps and a poor hand to make life hard for the opener's side. The overcaller answers the cue bid by rebidding the suit with a minimum and bidding game, or trying for it, with more.

Without a fit, advancer has three choices. Notrump shows a stopper in the opener's suit and is graded by strength. A new suit is natural, five cards or more. In Standard American it is not forcing, although some partnerships play a new suit by an unpassed advancer as forcing for one round, and that needs agreeing. The third choice is to pass, which is often right with a misfit and a weak hand. The overcaller has not promised a good hand, and rescuing a one-level overcall into a two-level contract rarely gains.

If opener's partner raises, say (1♥) 1♠ (2♥), advancer's raises keep their meaning, and a double becomes a responsive double, showing the two unbid suits.

Most competitive decisions over a one-level opening come down to a short list. Run through it in this order.

1. 1.Balanced 15 to 18 with a stopper: overcall 1NT.
2. 2.Any other hand of 17 points or more: double first, then bid your suit or notrump. An overcall would let partner pass with 7 points and a game on.
3. 3.Five-five in two suits: use the Michaels cue bid or the unusual 2NT, which name both suits at once.
4. 4.Short in their suit, support for the rest: make a takeout double.
5. 5.A good five-card suit or longer: overcall at the cheapest level, or jump if the hand is weak and the suit has six cards.
6. 6.Length in their suit, a poor suit of your own, or a two-level bid without the values: pass. Passing is not a failure, and it often leaves the opponents a guess in a suit you hold.

Over a 1NT opening, natural overcalls are possible, but most partnerships use a conventional defense such as Cappelletti, DONT or Landy, which show one and two-suited hands with artificial bids.

Without the overcall, North-South would have had no comfortable way into the auction, and East-West would have played a part score of their own. One bid both found the fit and, had the opponents gone on, directed the lead.

This is the case for keeping the 1NT structure the same as over an opening. South could describe a five-card major with invitational values in two bids, and North, knowing about the eight-card fit, chose spades over notrump.

• Overcalling on a weak suit at the two level. Points do not make up for K8653. Pass, or double if the shape is right.
• Overcalling with 17 or more. Partner will pass a 1♠ overcall with 6 or 7 points, and game can be missed. Double first and bid the suit next.
• Overcalling 1NT without a stopper. The opponents will lead their suit and may take the first five or six tricks.
• Treating a jump overcall as strong. In standard methods (1♦) 2♠ is weak. A good hand with six spades overcalls 1♠.
• Raising to the three level with a limit raise. The jump raise is preemptive. A good raise starts with the cue bid of the opener's suit.
• Pulling partner's overcall with a misfit. A weak hand without support usually passes. A new suit is for a real five-card suit and some values.