# alias: oneMajor3NTPictureBid
# button-text: 1M-3N Picture Bid
# gib-works: false
# bba-works: false
# scenario-title: --- 1M - 3NT Picture Bid
# auction-filter: Auction.....\n1[HS] +Pass +3N
# convention-card-ns: 21GF-DEFAULT
# convention-card-ew: 21GF-GIB

/*@chat
--- 1M - 3NT Picture Bid
A 3NT response to a 1M opening shows a very specific hand:
• 12-15 HCP, game-forcing values
• Exactly 2 cards in opener's major (no fit)
• Exactly 4 cards in each minor
• Therefore exactly 3 cards in the other major
• Wants to declare with tenaces protected
Opener can pass with no major fit, correct to 4M with a 6-card suit, or correct to 4-of-the-other-major with 5-3 fit.
Slam tries: 4NT (18-19 balanced), jump to 5M (6+ card suit), or 4-minor as a forcing slam try.
https://www.advinbridge.com/this-week-in-bridge/628
@chat*/

dealer south

#include "script/Predict-Opening-1-Bid"
# Defines oneSpade, oneHeart
#include "script/Calm-Opponents"
# Defines calmOpps

# Opener: 1H or 1S
oneMajor = oneHeart or oneSpade

# Responder shape: exactly 2 in opener's major, 3 in other major, 4-4 in minors
nShape3244 = oneHeart and shape(north, 3244)  // 1H opener: north is 3-2-4-4
nShape2344 = oneSpade and shape(north, 2344)  // 1S opener: north is 2-3-4-4
nShape = nShape3244 or nShape2344

# Responder strength: 12-15 HCP
nStrength = hcp(north)>11 and hcp(north)<16

oneMajor and nShape and nStrength and calmOpps

action

average "1H opener (3-2-4-4)" 100 * nShape3244,
average "1S opener (2-3-4-4)" 100 * nShape2344,
average "hcp North" hcp(north),
average "hcp South" hcp(south),