//
// PickFinalDiscardSuit()
//
int CPlayEngine::PickFinalDiscardSuit(CHandHoldings& hand)
{
// this routine is called by the declarer & defender engined when
// they absolutely can't find a card to discard
int nDiscardSuit = NONE;
// this means generally tha twe have no suits with losers,
// or that the only one with losers in the current hand is the priority suit
// so look through suits by preference for one that has losers
for(int i=3;i>=0;i--)
{
int nSuit = hand.GetSuitsByPreference(i);
CSuitHoldings& testSuit = hand.GetSuit(nSuit);
// avoid letting go of winners!
if ((testSuit.GetNumCards() > 0) && (testSuit.GetNumCards() > testSuit.GetNumWinners()))
{
nDiscardSuit = nSuit;
break;
}
}
// if we failed above, we aboslutely have no losers anywhere
// so search for a suit that has winners but no outstanding cards
// i.e., suits that we may not be able to cash
if (!ISSUIT(nDiscardSuit))
{
for(i=3;i>=0;i--)
{
int nSuit = hand.GetSuitsByPreference(i);
// see if we have cards in this suit, and no outstanding cards in the suit
if ((hand.GetNumCardsInSuit(nSuit) > 0) && (GetNumOutstandingCards(nSuit) == 0))
{
nDiscardSuit = nSuit;
break;
}
}
}
// finally, give up and get any old suit that has cards
if (!ISSUIT(nDiscardSuit))
{
for(i=3;i>=0;i--)
{
int nSuit = hand.GetSuitsByPreference(i);
if (hand.GetNumCardsInSuit(nSuit) > 0)
{
nDiscardSuit = nSuit;
break;
}
}
}
//
ASSERT(ISSUIT(nDiscardSuit));
return nDiscardSuit;
}
//
//===============================================================================
//
// TryConvention()
//
// check if we can bid a takeout double here
//
BOOL CNegativeDoublesConvention::TryConvention(const CPlayer& player,
const CConventionSet& conventions,
CHandHoldings& hand,
CCardLocation& cardLocation,
CGuessedHandHoldings** ppGuessedHands,
CBidEngine& bidState,
CPlayerStatusDialog& status)
{
//
// Negative doubles are made in the third position after
// partner opens and RHO overcalls up to 2S.
// The requirements for a negative doubles are:
// 1: partner must have opened the bidding,
// 2: we must either have passesed or not bid yet
// 3: RHO must have overcalled at a level no higher than 2S,
// 4: have 4+ cards in each unbid major, (5+ at the 2-level),
// 5: holding 6+ points at the 1-level, or 11+ at the 2-level, and finally,
// 6: don't have decent support for partner's suit
// test conditions 1, 2, 3, and 5
if ((bidState.m_bPartnerOpenedForTeam) && (bidState.m_numBidTurns <= 1) &&
(bidState.nLHOBid <= BID_PASS) && (bidState.nRHOBid > BID_PASS)
// NCR-145 Can't do NegDouble over Opening bid of Double
&& (bidState.nPartnersOpeningBid != BID_DOUBLE)
// NCR-294 Can't do NegDbl over NT
&& (bidState.nRHOSuit != NOTRUMP)
// NCR-116 split test into 2 parts depending on bid level
&& (((bidState.nRHOBid <= BID_1S) && (bidState.fCardPts >= OPEN_PTS(6)))
// NCR-116 higher level takes more points
|| ((bidState.nRHOBid <= BID_2S) && (bidState.fCardPts >= OPEN_PTS(11))))
&& !ISBID(bidState.nPreviousBid)) // NCR test if we made a previous bid
{
// passed the initial tests
}
else
{
return FALSE;
}
// test condition #6
// if we can raise partner or shift over the opponent,
// don't bother with a negative double
int nRHOBid = bidState.nRHOBid;
int nRHOBidLevel = bidState.nRHOBidLevel;
int nRHOSuit = bidState.nRHOSuit;
//
if (nRHOBidLevel == 1)
{
/*
// see if we can raise partner at the 2-level
if (pCurrConvSet->IsConventionEnabled(tidLimitRaises))
{
if ((bidState.numSupportCards >= 3) && (bidState.fPts >= OPEN_PTS(6)))
{
// we can raise partner at the 2-level, so forget the neg double
return FALSE;
}
else if (bidState.numSupportCards >= 3) && (bidState.fPts >= OPEN_PTS(6)))
{
// likewise, w/o limit raises
return FALSE;
}
}
*/
if ((bidState.numSupportCards >= 3) &&
(bidState.numSupportCards >= 3) && (bidState.fPts >= OPEN_PTS(6)))
{
// if we can raise partner at the 2-level, forget the neg double
if (pCurrConvSet->IsConventionEnabled(tidLimitRaises) &&
(bidState.fPts >= OPEN_PTS(11)) && (bidState.fPts < OPEN_PTS(13)))
return FALSE; // limit raise
else if (!pCurrConvSet->IsConventionEnabled(tidLimitRaises) &&
(bidState.fPts >= OPEN_PTS(13)) && (bidState.fPts < OPEN_PTS(17)))
return FALSE; // single raise
}
// check up to 2 suits
for (int i=0;i<2;i++)
{
// see if we can switch to this suit
int nSuit = hand.GetSuitsByPreference(i);
if (bidState.IsSuitShiftable(nSuit) && (nSuit > nRHOSuit))
return FALSE;
}
}
//
if (nRHOBidLevel == 2)
{
// see if we can safely raise partner at the 2-level
if ((bidState.numSupportCards >= 3) && (bidState.fPts >= OPEN_PTS(6)) && (bidState.nPartnersSuit > nRHOSuit))
{
// we can raise partner at the 2-level, so forget the neg double
return FALSE;
}
// see if we can raise partner to the 3-level (either 11 or 13 pts)
double nReqPts = pCurrConvSet->IsConventionEnabled(tidLimitRaises)? OPEN_PTS(11) : OPEN_PTS(13);
if ((bidState.numSupportCards >= 4) && (bidState.fPts >= nReqPts))
{
// we can raise partner to the 3-level, so forget the neg double
return FALSE;
}
// check up to 2 suits for a shift at the 2-level
for (int i=0;i<2;i++)
{
// see if we can switch to this suit
int nSuit = hand.GetSuitsByPreference(i);
if (bidState.IsSuitShiftable(nSuit))
{
// we can shift to the suit, but see if we have the pts
if ((nSuit < bidState.nPartnersSuit) && (bidState.fPts >= OPEN_PTS(10)))
return FALSE; // can shift to a lower suit at the 2-level
else if ((nSuit > bidState.nPartnersSuit) && (bidState.fPts >= OPEN_PTS(19)))
return FALSE; // can (jump) shift to a higher suit at the 2-level
}
}
}
else if (nRHOBidLevel == 3)
{
// opp. overcalled at 3-level; too high a level for a neg. double
return FALSE;
}
// test condition 4
// mark which majors are unbid
int nMajorSuits[2] = { 1, 1 };
if (bidState.nPartnersSuit == HEARTS)
nMajorSuits[0] = 0; // Hearts have been bid
else if (bidState.nPartnersSuit == SPADES)
nMajorSuits[1] = 0; // spades have been bid
//
if (bidState.nRHOSuit == HEARTS)
nMajorSuits[0] = 0;
else if (bidState.nRHOSuit == SPADES)
nMajorSuits[1] = 0;
// if both majors have been bid, we can't use negative doubles
if ((!nMajorSuits[0]) && (!nMajorSuits[1]))
return FALSE;
//
if (bidState.nRHOBidLevel == 1)
{
// at the 1-level, need 4+ cards in each unbid major and 6+ pts
if ( ((nMajorSuits[0]) && (hand.GetNumCardsInSuit(HEARTS) < 4)) ||
((nMajorSuits[1]) && (hand.GetNumCardsInSuit(SPADES) < 4)) ||
(bidState.fPts < OPEN_PTS(6)))
return FALSE;
}
else
{
// at the 2-level, need 5+ cards in each unbid major and 11+ pts
if ( ((nMajorSuits[0]) && (hand.GetNumCardsInSuit(HEARTS) < 5)) ||
((nMajorSuits[1]) && (hand.GetNumCardsInSuit(SPADES) < 5)) ||
(bidState.fPts < OPEN_PTS(11)))
return FALSE;
}
//
// finally, see if we have _too many_ points for a neg. double (19+)
//
if (bidState.fPts >= OPEN_PTS(19))
{
// status << "NEGDBLX! We have the holdings for a negative double, but our " &
// bidState.fPts & " points are too much\n";
return FALSE;
}
//
// we've now passed all the tests, so make the bid
//
if (bidState.nRHOBidLevel == 1)
status << "NEGDBL1! With " & bidState.fPts & "/" & bidState.fPts &
" points and 4 cards in the unbid majors, bid a negative double.\n";
else
status << "NEGDBL2! With " & bidState.fPts & "/" & bidState.fPts &
" points and 5+ cards in the unbid majors, bid a negative double.\n";
int nBid = BID_DOUBLE;
bidState.SetBid(nBid);
// bidState.SetConventionStatus(this, CONV_INVOKED);
bidState.SetConventionStatus(this, CONV_FINISHED);
return TRUE;
}