Evening star., 1934-04-17


greatest fDing contract and auction
player. He pdS captain Of the renowned
-Four HorSenlen" team, nolC dtSbanded,
and has non "a national champion
ships since 1924. These articles are
based on the Sims system, Uh,ch
includes the one-oUer principle,
,Chich the Sims group OF players wdS
the first to employ and deUelop.
Deductive Double.
7 HAVE finished, for the time being,
with two out of the three types
of double-the distributional and
L strategic. There remains the
third type.
The Deductive Double.
This is so-called because you make
it only when both opponents have bid
in such manner that you "deduce"
that their hands are weak combina-
ton and that your partner has passed
considerable values-enough to justify
your side in entering the bidding and
trying for at least part score or in
doubling low contract for a penalty.
These are the doubles which are the
most productive of large penalties at a
low bidding level. These rewards come
when your partner can leave in the
double for business or when the OPEN
Ing bidder or his partner rescue each
other and get into deeper mire, with
doubles to the right of them, doubles
to the left of them"
Two Bidding Situations Give Scope for
Deductive Double.
(a) If the player on your left opens
with one in suit and the next two
players pass. now you are in position
to make a deductive double. You do
not need big hand to do so. You
know three things:
/. The opening bidder cannot 60 for
game on his 13 cards; he did not bid
no trump or two no trumps or two
or three in a suit. He bid one in
suit. Playing against certain other
systems, you can judge the limita-
tions of his hand far more closely
than if he is playing my system.
2. Your partner was not strong enough
for a distributional double, but he also
was not weak enough to be afraid of
OAA~ Lloilo VI llC WOulu, IL lie ndQ a
safety spot, have made a strategic
double. He probably has something
in short-suited form. Probably he has
quite some strength in the openers
suit, especially if you are short and
weak in it.
s. The opponent on your right must
be very weak to pass the opening bid.
Modern bidding methods do not re-
qulre much to keep it open with no
trump. He can have little in high
cards and is not likely to be able to
improve or rescue the bid if your part
ner leaves the double in.
The Other Situation.
CD The bidding is: East, one in a
suit; South, pass; West, one no trump;
North. pass; East. pass.
Now you, in the South position, are
in position to make a deductive dou-
BILE if your cards Give any iustifca-
tion West could only bid a no trump
in response to the opening bid; the
opening bidder passed this response.
Plainly, your partner must have a fair
hand, otherwise why have the oppo-
nents signed off so promptly? If his
hand is aggressive in type, your side
must have sure part score in the
right contract. which you will reach
if you double. If his hand is defensive.
he can probably leave the double in
and you can collect a nice penalty.
There Are Possibilities of Huge Penal
ties in Your Favor.
have seen penalties of 1000 points
result from double Of one no trump
left in for business in this manner
and also from suit bids of one where
the deduction double was made by the
third hand after two passes and his
partner had trumps over the declarer
and passed. A deductive double is,
from its position and its motivation.
very different from a double made
Immediately over the opening bidder
and the penalty aspect looms very
large. In both situations the player on
the opening bidders left has passed, so
there is no risk that he holds q freak
hand Of aggressive type or else he
would have doubled immediately