Weak Jump Overcall - Sound

A holding which will normally not go down doubled more than
the value of the opponent's game at a given vulnerability,
counting on 1 trick from partner. (If your partner cannot
contribute at least 1 trick, the opponents probably have slam.)

                            # Winners For
                            Different Bid
                            -------------
 Vul.   Opp.Game  Max.Down  5   4   3   2
------  --------  --------  -   -   -   -
Favor.    600+    3 - 500   7   6   5   4
Equal     600+    2 - 500   8   7   6   5
Unfav.    400+    1 - 200   9   8   7   6


Example:

A2-2-KQJ65432-32 - This hand normally has 8 winners
(7 of the 8 Diamonds plus the Ace of Spades).

You can bid 5D at equial or favorable vulnerability
(first column above).

If your long suit is Hearts, you can bid game (4H) at
any vulnerability with 8+ winners (second column above),
but only at Favorable vulnerability with just 6 winners.

Entries for 5-level preempts (and even 4-level) should
be based on hands where most of the HCPs are in the long
suit, such as the one above.

The reason is that if the same points are spread around,
you may have too much defense to preempt. For example:
KQ-A-J8765432-32 has the same number of HCPs as the hand
above, but it has too many trump losers and too many
defensive quick tricks for a preemptive bid.