MULTI -LANDY  - DEFENSE AGAINST THEIR NT OPENING     

Multi-Landy is an improvement over Cappelletti (or Hamilton in Europe)that reversed the meaning of 2 by 2 for the majors.

Opener Overcaller
 1NT      2  <= both majors 5-5 or 5-4 (rarely 4-4 like old times)
             2  <= one good major 6+ cards (rarely 5 cards)
             2  <= 5-4+minor
             2  <= 5-4+minor
             2nt <= both minors 5-5+
             3  <= 6+ cards
             3  <= 6+ cards
             3  <= 7+ cards
             3  <= 7+ cards
             double <= penalty 15+ hcp and a long solid suit
                         examples:
xx Ax KQJ1094 A8x   or
                                          AKQJx Ax A98 98x

Opener Overcaller Responder Advancer
 1NT       2
             pass            ?
When Advance has 3 cards in one major and only 2 cards in the other major, of course, he bids the major that he has 3 cards, but when he has 3 cards in both majors he gives to overcaller the decision of what major they should play because overcaller could has sometimes 5-4 in majors.
Opener Overcaller Responder Advancer
 1NT       2
             pass            2 <= partner bid your long major

this simple modification in CAPP allows an improvement in the convention
that is fundamental to have statistical advantage in play Multi-Landy than play CAPP.

Criteriums to overcall for one suit:
maximum = 2 top honors and A or K in other suit - around 11 hcp
 Sxx HAQJxxx
Dxx CQ10x min <= 2D
 Sxx HQJ10xxx DAx CJ10x min <= 2D
 Sxx HKQJ10xx DAx CQ10x max <= 2D
 
Sxx HAKQ10x DAx CJ10x max <= 2D
 SK109xxx Hx DKx CJxxx min <= 2D
 SAK109xx Hx
DKJx CJxx max <= 2D
 SJ9xxx Hx DAKx CJxxx not qualified - honors must be in the suit bided
 SA HQ1054x
DKJx CQxx not qualified - honors must be in the suit bided

level 3
 SKQJ98xx Hxx
Dxx Cxx min <= 3S  for nVul against Vul
 Sxx HKJ10876xx Dxx Cx min <= 3H  for nVul against Vul
 Sxx Hx DAK10987x CQ10x max <= 3D same Vulnerability
 
SQx Hx DAxx CAKQ1098x max <= 3C Vul against nVul

Criteriums to overcall with 2 suits:
maximum = around 11 hcp with 5-5 cards and 2 top honors in both suits, in fact a good suit need middle cards J, 10, 9 to be powerful:
 SKQ98x HAQ10xx
Dxx Cx max  <= 2C
 Sx HKQ9xx DAK9762 Cx max  <= 2H
 Sxx HKQJ10x Dxx CAQ10xx max <= 2H
 
Sxx Hx DAQ108x CAQ109x max  <= 2nt
minimum = less than 11 hcp and missing 2 top honors in at least one suit
 SK98zx HK107xx
Dxx Cx min <= 2C
 Sx HKQ9xx DKJ876 Cxx min <= 2H
 SKJ10x HKQJ10x Dx Cxxx min <= 2C
 
SAK1082 Hx DK1098 CQxx min <= 2S

RESPONSE AFTER OVERCALL IN 2 SHOWING BOTH MAJORS

Advancer Opener Overcaller Responder
                 1NT       2             pass
    ?
   2   <= 6/7 cards - no tolerance for majors
   2
   <= equal number of cards in majors (2-2, 3-3, 4-4)
   2
   <= sign-off
   2   <= sign-off
 2NT  <= asks to partner clarify his hand
               3  <= better Hearts - maximum 5-5
               3  <= better Spades - maximum 5-5
               3  <= 5 minimum
               3  <= 5 minimum
              3NT <= 6-5 maximum
 Now what Advancer bids is conclusive

RESPONSE AFTER OVERCALL IN MAJOR SHOWING ALSO A MINOR

Advancer Opener Overcaller Responder
                 1NT       2/2       pass
    ?
   2   <= after 2 overcall shows 6/7 cards - sign-off
 2NT  <= asks to partner bid his minor
   3   <= 6/7 cards sign-off - not interested in overcaller suits
   3   <= 6/7 cards sign-off - not interested in overcaller suits
   3   <= after 2 overcall shows 6/7 cards - sign-off
4/4 <= to play  
  Advance makes an invitation bidding support at level 3 for major and bidding support at level 4 to the minor bided by overcaller.

RESPONSE AFTER OVERCALL IN 2 SHOWING 6 CARDS IN A MAJOR     

Advancer Opener Overcaller Responder
                 1NT        2           pass
    ?
   2   <= weak to play in Hearts (or also to play in Spades)
   2   <= weak to play in Spades, but positive to Hearts
              if Overcaller has good hand with Hearts he makes a trial bid
              in his weak 3 cards suit asking for support for game or just
              jumped to game in 4
 2NT  <= asks to Overcaller clarify his hand
               3   <= 6+ csrds - maximum
               3   <= 6+ cards - maximum
               3   <= 5+ cards minimum
               3   <= 5+ cards minimum

RESPONSE AFTER OVERCALL IN 2NT SHOWING BOTH MINORS   

Advancer Opener Overcaller Responder
                 1NT        2NT          pass
    ?
   3   <= to play
   3   <= to play - shows more cards in Diamonds than in Clubs
   3   <= 6+ sign-off
   3   <= 6+ sign-off
  3NT  <= to play
   4    <= invitation to 5
   4    <= invitation to 5
   4   <= to play
   4   <= to play
   5    <= to play
   5    <= to play 

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