M J Bridge

Bidding

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Hands

Theory and Conventions


N

Q 9 8 6

7

T 6 4 3

K Q 6 2


S

J 5 4 3

K J 5

A K Q 7

A 5


W

T

9 6

J 8 5 2

J T 9 8 4 3


E

A K 7 2

A Q T 8 4 3 2

9

7

Hand

D4

Context

Kidney Research sim pairs July 2018 - board 20

Dealer

West

Methods

Opening one of a suit, 1NT overcall, three-level preempt, opening at the four-level, high-level double.

Vulnerability

Both



Opening one of a suit, 1NT overcall

East’s obvious opening bid is 1.

South has a natural 1NT overcall if playing 15 - 18.

If North passes East will probably rebid 3.

If North starts an invitational sequence with 2 then NS will probably reach 4.

W

N

E

S

-

-

1

1NT

-

-

-






Post-beginner and above

Opening at the four-level, double, North passes

Following two passes East might just try 4 in third seat.

If the double is primarily for penalties North will be torn between pass and 4.

W

N

E

S

-

-

4

x

-

-

-






What happens?


The frequencies quoted in the following are rounded from the 400 plays of the hand (or thereabouts) for which contract information is available.


Roughly 160 played in a spade contract and 220 in a heart contract, frequently doubled in both cases.


In theory 4 can be made.  In practice 55 pairs made ten tricks (scoring 91% to NS if bid and 64% if in a part-score), and 65 made 9 (60% in a making part-score), but these scores have to be set against 45% for one down and 19% for one down doubled.


4 can in theory be taken two down (66 pairs scoring 77% to NS), but in practice was usually one light (143 pairs scoring 47% to NS and 53% to EW)


55 of those in a spade contract made 10 tricks, 65 made 9 tricks and the rest made 8 or less.

7 of those in a heart contract made 10 tricks, 143 made 9 tricks, and the rest made 8 or less.

Opening at the four-level, double, North bids 4.

East tries a 4 opener for size and South doubles.

If the double is primarily for take-out then North will bid 4.

If the double is primarily for penalties North might still prefer to have a go at 4.

W

N

E

S

-

-

4

x

-

4

-

-

-




Hand D3

Hand E1

Three-level preempt

In third seat East might just overlook his other four-card major and his overstrength points holding and start with an ostensibly preemptive 3.

South will either bid 3NT, or double, leading to a final contract of 3NT or 4 respectively.

W

N

E

S

-

-

3

3NT

-

-

-