# alias: WeakJumpShift
# button-text: Weak Jump Shift (Lev)
# gib-works: false
# bba-works: true
# auction-filter: Note...:Weak Jump Shift
# convention-card-ns: 21GF-WJS-MSS
# convention-card-ew: 21GF-GIB

/*@chat
--- Weak Jump Shift
South opens, West passes, and North jumps -- a single jump.
• at the 2-level showing 2-5 HCP and 6+ cards -- too weak for the 1-level.
• at the 3-level showing 2-7 HCP and 7+ cards in the suit bid
 Leveled: Opener's Force, Rebid, New Suit, (Pass or Raise) occur at about the same frequency.
https://www.bridgebum.com/weak_jump_shifts.php
@chat*/

dealer south

# Weak Jump Shift
# South Open's 1C, 1D, or 1H and North has 5 or less HCP and a 6-card suit
produce 1000

#include "script/Calm-Opponents"
# Defines calmWest

#include "script/Predict-Opening-1-Bid"
# Defines oneSpade, oneHeart, oneDiamond, oneClub, gibNT

# Define north's WJS suits
nC = clubs(north)>6    and top4(north,clubs)>1
nD = diamonds(north)>5 and top4(north,diamonds)>1
nH = hearts(north)>5   and top4(north,hearts)>1
nS = spades(north)>5   and top4(north,spades)>1

# Define weak jump shifts -- they're usually at the 2-level
s1C = oneClub    and (nD or nH or nS)
s1D = oneDiamond and (nH or nS)
s1H = oneHeart   and nS

# sometimes at the 3-level
s1S3 = oneSpade   and (nC or nD or nH)
s1H3 = oneHeart   and (nC or nD)
s1D3 = oneDiamond and nC

#  A Weak Jump Shift at the 2-level is too weak to make a 1-level response
WJS2 = (s1C or s1D or s1H) and hcp(north)>1 and hcp(north)<6

#  at the 3-level it needs extra length and might be a little stronger
WJS3 = (s1S3 or s1D3 or s1H3) and hcp(north)>1 and hcp(north)<8 and shape(north,any 8xxx+any 7xxx)

# Define opener's rebids
cFit = nC and clubs(south)>2
dFit = nD and diamonds(south)>2
hFit = nH and hearts(south)>2
sFit = nS and spades(south)>2
fit = (cFit or dFit or hFit or sFit)

s1Suit = shape(south,any 8xxx+any 7xxx)
s2Suit = shape(south, any 76xx+any 75xx+any 65xx+any 55xx)

force1  = hcp(south)>17 and fit    // 2N -- continuations like after 2N response to a Weak Two Bid
force2  = hcp(south)>19 and not (fit or force1)
rebid   = s1Suit        and not (fit or force1 or force2)
newSuit = s2Suit        and not (fit or force1 or force2 or rebid) 
other   = not (force1 or force2 or rebid or newSuit)

# Level the deal
#include "script/Leveling"

levForce1  = force1  and keep75
levForce2  = force2  and keep
levRebid   = rebid   and keep
levNewSuit = newSuit and keep56
levOther   = other   and keep06
levelTheDeal = levForce1 or levForce2 or levRebid or levNewSuit or levOther

# Now do it
# South opens, West passes, and North makes a Weak Jump Shift
(WJS2 or WJS3) and calmWest and not gibNT and hcp(south)>11 and hcp(south)<22
and levelTheDeal

action
average "force w/fit  " 100 * force1,
average "force w/o fit" 100 * force2,
average "rebid        " 100 * rebid,
average "newSuit      " 100 * newSuit,
average "raise or pass" 100 * other,
average "-------------" 100 * (force1+force2+rebid+newSuit+other),
average "hcp(south)   " hcp(south),
average "hcp(north)   " hcp(north),