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%Creator: BridgeComposer Version 5.105
%Created: Fri Feb 16 09:33:41 2024 -0000
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%HRTitleEvent "BFP BP L10 Opening Lead Trump Contracts"
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%PageFooter:0,0 "                   \\nwww.bridgeforpleasure.co.uk"
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[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "1"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "N"]
[Vulnerable "None"]
[Deal "N:AQJT7.KJT86.J.53 K63.43.9862.KQJ2 9852.Q7.KQT.A876 4.A952.A7543.T94"]
% RBIMPOSE B
[Scoring ""]
[Declarer "N"]
[Contract "4S"]
[Result ""]
{




East leads \CK <span style=color:#f00>top of a sequence</span> to drive out the
\CA and establish \CQ etc.

The defence return clubs when they get the lead.
}
[BCFlags "8dd"]
[DoubleDummyTricks "79856798565348753487"]
[OptimumScore "NS 140"]
[ParContract "NS 3S="]
[Auction "N"]
1S Pass 3S Pass
4S AP
[Play "E"]
CK
[OptimumOpeningLeadTable "Leader;Denomination\2R;Result\2R;S\5;H\5;D\5;C"]
N NT  8 AQJT7 KJT86 -     -
N  S 10 A     -     J     -
N  H  9 -     KJT86 J     -
N  D  5 A     KJT86 J     53
S NT  8 9852  Q7    -     -
S  S 10 9852  -     KQT   -
S  H  9 -     Q7    KQT   -
E NT  6 -     -     9862  KQJ2
E  S  4 -     43    -     KQJ2
E  H  5 -     -     -     KQJ2
E  C  7 -     43    9862  2
W NT  6 -     -     A7543 T94
W  S  4 -     A     -     T94
W  H  5 4     -     -     T94
W  C  7 4     952   A     T9
[OptimumResultTable "Declarer;Denomination\2R;Result\1R"]
N NT 7
N  S 9
N  H 8
N  D 5
N  C 6
S NT 7
S  S 9
S  H 8
S  D 5
S  C 6
E NT 5
E  S 3
E  H 4
E  D 8
E  C 7
W NT 5
W  S 3
W  H 4
W  D 8
W  C 7

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "2"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "E"]
[Vulnerable "NS"]
[Deal "E:AQJT73.JT8.87.A5 K6.43.J9632.QJ32 985.Q75.KQT.8764 42.AK962.A54.KT9"]
% RBIMPOSE B
[Scoring ""]
[Declarer "E"]
[Contract "2S"]
[Result ""]
{

<span style=color:#f00>Lead partner's bid suit. With no honours, signal
count.</span>

South leads partners hearts. \H4 so as to follow with \H3 showing the
doubleton.

<span style=color:#f00>Then use McKenney lead to ask for diamond return.</span>

South must look out for a suit preference signal when North leads a third heart
for a trump. The high pip count on \H9 indicates a diamond.

A diamond return allows return of a fourth heart establishing the \SK.
}
[BCFlags "df"]
[DoubleDummyTricks "75898759986844468444"]
[OptimumScore "EW -100"]
[ParContract "EW 3SX-1"]
[Auction "E"]
1S Pass 1NT 2H
2S AP
[Play "S"]
H4
[OptimumResultTable "Declarer;Denomination;Result"]
W S 8
W H 4
W D 4
W C 4
W N 6
N S 5
N H 8
N D 9
N C 8
N N 7
E S 8
E H 4
E D 4
E C 4
E N 6
S S 5
S H 9
S D 9
S C 8
S N 7

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "3"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "S"]
[Vulnerable "EW"]
[Deal "S:KQ963.K765.AQ.T4 JT8.QT43.75.A732 A752.J8.86432.QJ 4.A92.KJT9.K9865"]
% RBIMPOSE B
[Scoring ""]
[Declarer "S"]
[Contract "2S"]
[Result ""]
{

With three spades West has some hope of trumping a third diamond trick. 

West leads \D7 planning to follow with \D5 when diamonds are played again,
<span style=color:#f00>signaling the doubleton</span> to partner. 

On this occasion it makes no difference. }
[BCFlags "df"]
[DoubleDummyTricks "79684796846375963758"]
[OptimumScore "NS 140"]
[ParContract "NS 3S="]
[Auction "S"]
1S Pass 2S AP
[Play "W"]
D7
[OptimumResultTable "Declarer;Denomination;Result"]
W S 3
W H 7
W D 5
W C 8
W N 6
N S 9
N H 6
N D 8
N C 4
N N 7
E S 3
E H 7
E D 5
E C 9
E N 6
S S 9
S H 6
S D 8
S C 4
S N 7

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "4"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "W"]
[Vulnerable "All"]
[Deal "W:AQT84.KT754..K74 K96.8.Q954.QT932 J532.QJ32.KJT7.5 7.A96.A8632.AJ86"]
% RBIMPOSE B
[Scoring ""]
[Declarer "W"]
[Contract "4S"]
[Result ""]
{

<span style=color:#f00>Count signal</span>

North holds three trumps and a singleton heart. Leads \H8.

South should return the suit trusting partner. 

Leading the \H9 suggests a remaining even count. For this count, the \HA is
ignored as it was a “forced” card.

North can return either side suit for South to take with the ace.\n
Repeat the process for four tricks getting the contract down.
}
[BCFlags "df"]
[DoubleDummyTricks "743897439969a4469a44"]
[OptimumScore "NS -500"]
[ParContract "NS 5CX-2; S 5DX-2"]
[Auction "W"]
1S Pass 3S Pass
4S AP
[Play "N"]
H8
[OptimumResultTable "Declarer;Denomination;Result"]
W S 9
W H 10
W D 4
W C 4
W N 6
N S 4
N H 3
N D 8
N C 9
N N 7
E S 9
E H 10
E D 4
E C 4
E N 6
S S 4
S H 3
S D 9
S C 9
S N 7

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "5"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "N"]
[Vulnerable "NS"]
[Deal "N:AJ843.2.96.AKT54 K6.AT765.AJT.872 Q952.J83.KQ84.QJ T7.KQ94.7532.963"]
% RBIMPOSE B
[Scoring ""]
[Declarer "N"]
[Contract "4S"]
[Result ""]
{

<span style=color:#f00>M(iddle) U(p) D(own) lead</span>

East should not lead from spades, hearts or diamonds because every one of these
suits has an isolated honour.

Leading from the clubs, East should start with the \C7 (Middle), follow to the
next trick with \C8 (Up) and then \C2 (Down). 

This MUD sequence tells partner there’s no values in the club suit in East’s
hand.

The lead does no harm, declarer has all the high value clubs.
}
[BCFlags "df"]
[DoubleDummyTricks "6a68a6a68a6375363753"]
[OptimumScore "NS 620"]
[ParContract "NS 4S="]
[Auction "N"]
1S Pass 3S Pass
4S AP
[Play "E"]
C7
[OptimumResultTable "Declarer;Denomination;Result"]
W S 3
W H 7
W D 5
W C 3
W N 6
N S 10
N H 6
N D 8
N C 10
N N 6
E S 3
E H 7
E D 5
E C 3
E N 6
S S 10
S H 6
S D 8
S C 10
S N 6

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "6"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "E"]
[Vulnerable "EW"]
[Deal "E:K9863.KQ9.K7.J63 72.A43.A943.A954 AQJT.J85.652.QT7 54.T762.QJT8.K82"]
% RBIMPOSE B
[Scoring ""]
[Declarer "E"]
[Contract "3S"]
[Result ""]
{

South holds three isolated aces. All three should be held back to defeat kings
or queens.

A <span style=color:#f00>“passive” lead</span> of a trump does no harm and
preserves the aces for taking declarers honours.

When taking a trick with an ace, South should continue a passive line, lead a
trump or return an already played suit, and avoid leading from the remaining
suits with isolated aces.


}
[BCFlags "df"]
[DoubleDummyTricks "75888758886855568555"]
[OptimumScore "NS -100"]
[ParContract "NS 2NX-1; NS 3CX-1; NS 3DX-1; NS 3HX-1"]
[Auction "E"]
1S Pass 3S AP
[Play "S"]
S2
[OptimumResultTable "Declarer;Denomination;Result"]
W S 8
W H 5
W D 5
W C 5
W N 6
N S 5
N H 8
N D 8
N C 8
N N 7
E S 8
E H 5
E D 5
E C 5
E N 6
S S 5
S H 8
S D 8
S C 8
S N 7

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "7"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "S"]
[Vulnerable "All"]
[Deal "S:K9863.KQ9.K7.J63 7.A32.T9432.AK95 JT52.J85.A6.QT74 AQ4.T764.QJ85.82"]
% RBIMPOSE B
[Scoring ""]
[Declarer "S"]
[Contract "2S"]
[Result ""]
{

West leads \CA from <span style=color:#f00>top of sequence</span> of two
touching honours. \n
East follows with <span style=color:#f00>encouraging and top of
doubleton</span> \C8.\n
West continues with \CK and sees the confirmation of a doubleton, \C2.

Knowing that partner will trump the next club, West leads the higher remaining
club, \C9. This <span style=color:#f00>McKenney lead indicates suit preference
for the higher ranking remaining non-trump suit,</span> hearts.

East reads the signal and returns a heart.

West takes the fourth trick. It’s worth returning another club in case partner
has a high trump. This time it makes no difference.
}
[BCFlags "df"]
[DoubleDummyTricks "68547685476589655795"]
[OptimumScore "EW 110"]
[ParContract "EW 3D="]
[Auction "S"]
1S Pass 2S AP
[Play "W"]
CA
[OptimumResultTable "Declarer;Denomination;Result"]
W S 5
W H 7
W D 9
W C 5
W N 5
N S 8
N H 5
N D 4
N C 7
N N 6
E S 5
E H 8
E D 9
E C 6
E N 6
S S 8
S H 5
S D 4
S C 7
S N 6

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "8"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "W"]
[Vulnerable "None"]
[Deal "W:AQJ8.7654.K3.AK2 97.T982.A9876.Q3 KT65.QJ3.QJT.JT9 432.AK.542.87654"]
% RBIMPOSE B
[Scoring ""]
[Declarer "E"]
[Contract "4S"]
[Result ""]
{

South leads K\H from <span style=color:#f00>AK Doubleton</span>. 

North follows with 8\H count of even number of hearts.

South continues with A\H indicating the doubleton.

North follows with a signal for the switch 10\H. It's a high value asking for a
switch to the higher ranking suit out of diamonds and clubs. South can see the
top clubs in dummy and so would switch to diamonds anyway.

South leads a diamond, won by North.\n
North returns a heart trumped by South.

Contract down.}
[BCFlags "df"]
[DoubleDummyTricks "33465334659996899968"]
[OptimumScore "EW 400"]
[ParContract "EW 3N="]
[Auction "W"]
1H Pass 1S Pass
4S AP
[Play "S"]
HK
[OptimumResultTable "Declarer;Denomination\2R;Result\1R"]
N NT 3
N  S 3
N  H 4
N  D 6
N  C 5
S NT 3
S  S 3
S  H 4
S  D 6
S  C 5
E NT 9
E  S 9
E  H 9
E  D 6
E  C 8
W NT 9
W  S 9
W  H 9
W  D 6
W  C 8

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "9"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "N"]
[Vulnerable "EW"]
[Deal "N:AQJ8.8765.AK.KQ2 97.JT94.98763.A3 KT65.Q32.QJT.JT9 432.AK.542.87654"]
% RBIMPOSE B
[Scoring ""]
[Declarer "S"]
[Contract "4S"]
[Result ""]
{

West leads K\H from <span style=color:#f00>AK Doubleton</span>. 

East follows with 9\H hinting at count of even number of hearts.

West continues with A\H indicating the doubleton.

East follows with a signal for the switch 4\H. It's a low value asking for the
lower ranking suit out of diamonds and clubs. West can see the top diamonds in
dummy and so would switch to clubs anyway.

West leads a club, won by East.\n
East returns a heart trumped by West.

Contract down.}
[BCFlags "df"]
[DoubleDummyTricks "99969999693346433464"]
[OptimumScore "NS 400"]
[ParContract "NS 3N="]
[Auction "N"]
1H Pass 1S Pass
4S AP
[Play "W"]
HK
[OptimumOpeningLeadTable "Leader;Denomination\2R;Result\2R;S\4;H\4;D\3;C"]
N NT 10 AQJ8 8765 AK  -
N  S 10 AQJ8 -    AK  KQ2
N  D  7 AQJ8 -    AK  -
N  C  9 AQJ8 8765 AK  KQ
S NT 10 KT65 32   QJT -
S  S 10 KT65 -    QJT JT9
S  H  9 KT65 32   QJT JT9
S  D  7 KT65 -    QJT -
S  C  9 KT65 32   QJT JT9
E NT  4 -    -    -   A
E  S  4 -    JT94 -   -
E  D  7 -    JT94 -   A
W NT  4 -    -    -   87654
W  S  4 -    AK   -   -
W  D  7 -    AK   -   87654
[OptimumResultTable "Declarer;Denomination\2R;Result\1R"]
N NT 9
N  S 9
N  H 9
N  D 6
N  C 9
S NT 9
S  S 9
S  H 9
S  D 6
S  C 9
E NT 3
E  S 3
E  H 4
E  D 6
E  C 4
W NT 3
W  S 3
W  H 4
W  D 6
W  C 4

[Event "BFP BP L10 Opening Lead Trump Contracts"]
[Site ""]
[Date ""]
[Board "10"]
[West ""]
[North ""]
[East ""]
[South ""]
[Dealer "E"]
[Vulnerable "All"]
[Deal "E:AQ984.Q874.AK3.5 T6.K92.J92.J9832 K532.A6.8754.AQ7 J7.JT53.QT6.KT64"]
% RBIMPOSE B
[Scoring ""]
[Declarer "E"]
[Contract "6S"]
[Result ""]
{

West/East may or may not bid the slam. It’s worth a go but shouldn’t make.

South’s choice of lead is a case of “least worse”. There’s no clue in the
auction. South shouldn’t lead from the unsupported \HK. The minors have poor
broken holdings. Declarer and dummy have only bid spades naturally.

Lead \S6. No harm done and a chance to see dummy and the first few tricks. 

Declarer will be lucky to avoid losing a heart and a diamond.
}
[BCFlags "df"]
[DoubleDummyTricks "3232532325ab8b7ab9b8"]
[OptimumScore "EW 650"]
[ParContract "EW 4S+1"]
[Auction "E"]
1S Pass 4S Pass
4NT Pass 5D Pass
6S AP
[Play "S"]
S6
[OptimumResultTable "Declarer;Denomination\2R;Result\2R"]
N NT  3
N  S  2
N  H  3
N  D  2
N  C  5
S NT  3
S  S  2
S  H  3
S  D  2
S  C  5
E NT 10
E  S 11
E  H  8
E  D 11
E  C  7
W NT 10
W  S 11
W  H  9
W  D 11
W  C  8
