I am a member of the expert panel of the problem solvers for "Brydz"
magazine, the Polish version of "The Bridge World." The "Polish  Club" is
considered standard for this purpose. Here is the version they provided
me:

"Polish Club" 95

Openings:

1C: preparatory 12-14), natural (15-17), or strong (18+)
1D: 5 cards or 4 diamonds and 5 clubs, or 4-4-4-1 with 4 diamonds
1H, 1S: 5 cards (12-17)
1NT: 15-17
2C: Precision (5+ clubs, 11-14)
2D: "Wilkosz" (5+, 5+ at least one major, 6-10)
2H, 2S: weak two
2NT: minors (6-10)
3NT: gambling, no side stopper
4C, 4D: 9 tricks in hearts, spades respectively

Responses and subsequent bidding: 

After 1C opening: 1D is either negative or semi-positive (7-11) with
minor(s), or strong (17+) BALANCED, 2C, 2D: game forcing (minimum 5
cards), 3C, 3D: not forcing, good 6-card suit (9-11), 3H, 3S: 7-card suit
with two top honors, nothing aside. 1C-1D-2D: artificial, game forcing

After 1D opening: 2D is one round forcing, 3D is preemptive

After 1H, 1S opening: 1NT is not forcing, 2 over 1 is one round forcing.
2NT is game forcing with support.

After all 1-level openings and a 1H, 1S response, the responder's rebid of
2C is a relay (e.g. 1C-1S-1NT-2C).

After all 1-level openings and a 2 over 1 response, the responder's rebid
of 2NT is forcing.

After 1NT opening: Stayman, 2D, 2H: transfers, 2S: transfer for clubs or
invitation to 3NT, 2NT: transfer for diamonds, 3-level jumps indicate
shortness (5-4-3-1) distribution).

After 2C opening: 2D: relay, 3D, 3H, 3S: natural, forcing.

After 2D opening: 2NT: relay. 3D: inviting with supports in both majors,
4D: supports both majors.

After Weak Two opening: the lowest possible bid asks about shortness. A
new suit is forcing. 2H-2NT: indicates a spade suit.

After 3NT opening: 4D asks about a shortage.

Slam bidding: Cue-bids, splinter, Blackwood, Hoyt, Josephine.

After interference: Sputnik doubles through 4D after 1-level opening. 1C
(1D)-1H-dbl: sputnik double, denies four spades. 1C-1D-dbl: both major
fours. After an overcall a new suit at 2-level is not forcing, a new suit
at 1-and 3-level is forcing. 1H(1S)-dbl-?-shift jumps and no trump bids
promise support. Lebensohl.

Defensive bidding: 1NT: 15-17, being last hand: 12-15. Single jumps:
preemptive in any vulnerability. Michaels' cue-bids. The only negative bid
after partner's take-out double is 1C-Dbl-pass-1D. Lebensohl after 2H(2S)
opening and partner's take-out double.

Leads: Top from honors, Rusinov from smalls, 9 from T(x(x...), T from Tx,
natural from internal sequences.

I hope this helps,

John Blubaugh

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