Our overcalls

5.1. Principles:
Weak/PRE vs. strong openings, opening/AVG vs. weak.
Pass vs. strong/F1 bids contains the strong hands.
DBL vs. not strong artifical bids by unpassed Pd shows a BAL or semi BAL strong hand.
Bids in OPP's real suit vs. xfer bids at same level show Raptor. NT in such case is NAT or shows minors, if can't be NAT.

5.2. Versus 1-of-a-suit openings:
Pass: Can be a trap pass, but with 18-HCP.
DBL: BAL or semi BAL, opening strength, in balancing position can be less. Promises 3 card support in unbid suits, if 12-14HCP. Can be with length in OPP's suit with 18+HCP.
Unbid suit: 8-17HCP, 5-8L, 5(4)+ suit, denies 4+ cards in unbid major. 2 level overcalls promise 6 or good 5 cards. In case of a NAT overcall in their bid suit (they bid 2 suits), it promises 6+ cards with good intermediates.
Jump in an unbid suit: Weak/PRE vs. strong, opening/AVG vs. weak.

1NT: 8+HCP, 8-L, F1, promises 4+ unbid major - 4+ unbid minor, UNBAL. Includes 4441/5440. Includes 5+-5+ with highest-lowest unbid suits.
2NT: 8+HCP, 7-L, F1, 5+-5+ in lowest unbid suits.
3NT: To play. Playable unbid suit with a stopper in OPP's suit.
4/5NT: PRE, 6+-6+ in lowest unbid suits.
Cue bid (2 level): 8+HCP, 7-L, F1, 5+-5+ in highest suits, can be 5+-4+, if both majors.
Cue bid (3 level): 9+HCP, 6-L, F1, 6+ solid unbid suit. Ask for stopper in OPP's suit to play 3NT. Can be STRY with a one-suiter (continue bidding then, F1)
Cue bid (4/5 level): PRE, 6+-6+ in highest suits

5.3. Versus 1 NT:
DBL: NF, 5+minor, OR 4+H-4+S, OR 18+BAL
2C/D: NF, 4+C/D-4+higher (DONT)
2H/S: NF, 5+H/S
2NT: PRE, 6+C or 5-L, 5+H-5+D/S
3C: PRE, 6+D or 5-L, 5+C-5+H/S
3D: PRE, 6+H or 5-L, 5+D-5+C/S
3H: PRE, 6+S or 5-L, 6+S-5+H
3S: (aka Gambling) AKQxxxx+, any suit.
3NT: PRE, 7+C/D, bad suit
4C/D: 4-L, 7+H/S
4H/S: PRE, 7+H/S

5.4. Versus strong artifical openings or multi purpose with a strong variant (Polish club) :
Pass:
DBL: 2-D-3+other suits
D: 2-C-3+other suits
H: 2-S-3+other suits
S: 2-H-3+other suits
NT: 4+M-5+m
C: 4+C-5+M
D: 4+D-5+M
jump NT: 5+C-5+D
other bids: NAT, NF


5.5. Versus 2 level pre-empts:
Note: Bids don't include OPP's real suit
DBL: 14+HCP, SEMIBAL
2D: 12+HCP, F1, 4+H-4+S
2NT: 12+HCP, 7-L, F1, promise 4+ unbid major, UNBAL. Include 4441/5440/5+-5+.
New suit: 12-17HCP, 5+suit, denies side 4-crd major
Jump in a new suit: Weak/PRE vs. strong, opening/AVG vs. weak.
Cue bid @ 3+ level: 9+HCP, 6-L, F1, 6+ solid unbid suit. Asks for a stopper in OPP's suit to play 3NT. Can be STRY with a one-suiter (continue bidding then, F1)
3NT: To play
4C: F1, 4M-6+
4D: F1, 5+M-5+
4H/S: To play

5.6. Versus 3 level pre-empts:
Note: Bids don't include OPP's real suit
DBL: 14+HCP, SEMIBAL
3D: 12+HCP, F1, 4+H-4+S
3H: 12-17HCP, 5+H
3S: 12-17HCP, 5+S
3NT: To play
4C: F1, 4M-6+
4D: F1, 5+M-5+
Cue bid @ 4+ level: 9+HCP, 6-L, F1, 6+ solid unbid suit, STRY with a one-suiter (continue bidding then)
4H/S: To play