[Index]System Dutch Doubleton

Dutch Doubleton/Polish Club

brink/drijver (08-2): 1C-1D-1NT-2C stayman
kroes/vancleeff (06-5): 1C-1D(0-7)-2D w 5 JT92 AKQ2 AKQ8
                                     -2NT weak
                                     -3C gf
ramer (04-6): polish club:
  1C 18+ or 12-14 bal or 15-17 w 5-crd C unbal
  1C-1D a 0-6 b 7-11 no 4-crd M, unbal c 16+ bal
       -1H 3+crd
          -P 3+crd 0-6
          -1S 4-crd weak
             -2H 5-crd 18-20
       -1S 3+crd bal 12-14 or 5+crd 18-20
          -2H weak
       -1NT 18-20 bal: AK7 7 AJ843 AK62 (better to open 1D)
       -2C 15-17 5+crd unbal or 18-20 6+crd
       -2D gf
       -2H/S strong nf
       -2NT 21-23
       -3C/D semiforc

nn (04-9): 1C(pol)-2D-3C 5+crd 15-17
ramer (04-6): polish club:
  1C-1H/S 4+crd 7+
         -1NT bal 12-14
         -2C 5+crd 15-17 no support
         -2D R, 18+ 3+crd support
            -2H 4-crd M 7-10
               -3C(real)-4D splinter
            -2S 4-crd M 11+
            -2NT 5-crd M 11+
            -3C/D 5+crd 4-crd M 9-11
            -3H 5-crd M unbal weak
            -3S 5-crd M bal weak
            -3NT 6-crd bal weak
            -4x 6-crd splinter, weak
            -4H(after 1H) singleton S
         -2NT 18+
         -3M 15-17, 5-crd C, 4-crd support min
         -4C/D/3S 15-17 splinter
         -4M 15-17, 5-crd C, 4-crd support max
    -1NT 7-10
        -2S(5-crd 18+)-4C fitbid
    -2C/D 5+crd gf
    -2NT 11-12
    -3C/D 6-crd invite

ramer (04-6): polish club:
  1D 4+-crd 11-20
  1H/S 11-17 5-crd
  1NT 15-17 bal
  2C 11-14 precision
verhees (02-4): 1D-1H-2NT 6-crd D 15+(T:because 18-19 is opened 1C)

Dutch Orange Club

brink/drijver (08-1): 1C(2+)-1D w A42 KT32 KJ62 53
                               -1H real or bal 12-14
                                  -1S(R)-1NT bal 12-14
jansma (07-5):
  1C a. 12-14 bal b. 16+ 5+crd C c. 18+ 5+crd H/S d. strong hands
    -1D(R)-1H a. 12/14 bal b. 5+crd 18+ c 25+ bal
             -1S(R)-1NT stayman+transfer
             -1NT 4-4 S-H nf
          -1S 5+crd 18+ rf
             -1NT(R)
          -1NT 18-19 bal stayman, transfer
          -2C 5+crd 16-21
          -2D(gf)-2H(R)
          -2H/S gf w H/S not 55
          -2NT 22-24 bal
brink/vanprooijen (04-9): 1C(2+)-1D-1H-1S(R)-1NT 12-14 bal
                                                -2C stayman
schollaardt/drijver (04-4): 1C(2+)-1D-1H-1S(R)-1NT bal 12-14
bakker (04-1): 1C-1D-1S(rf)-1NT 2nd negative
                               -2H-4C cuebid
bakker (03-12): new name: Orange Club
  1C a. 12-14 bal b. 5-crd C 16+ c. 5-crd H/S 18+ d. strong hands

bertens/bakkeren (08-2): 1C-2H 5-crd S 4-crd H 4-8
                              -2NT(puppet)-3C-3S forcing
jansma (07-5):
  1C-1H 4+crd S! 8+
       -1NT <3-crd S
              -4D transfer
    -1S 4+crd H! 8+
    -1NT 8-10
    -2C 5+crd 12+(gf)
    -2D a. 5+crd 12+(gf) b. 6-crd H/S 4-8
    -2H/S 6-crd 9-11
    -2NT 11-12
    -3/C/D/H/S preempt
    -3NT 13-15
    -(1D)-X 4+crd H
         -1H 4+crd S
         -1S 44 H/S
         -2D 44 H/S(bocchi/duboin)
    -(1H)-X 4/5-crd S
         -1S transfer to 1NT
         -1NT to play: AQJ of H
         -2H 6-crd S
tammens (vk05-1): 1C-1S(=H)-2C(forcing)-2S-4C solid suit
bakker (04-6): 1C(or)-2D multi: 3-8 6-crd M or 12+ w D
                        -2H(nf)-P H
                               -2S(=S)-3C to play
                               -other D
                        -2S(nf)-P S
                               -3C/H/4H H
                               -other D
                        -2NT(R)-3C H
                               -3D S
                               -other D
                        -3C real, forcing
                     -2H 7-11 5-crd H, 4-crd S
                     -2S 9-11 6-crd S
bakker (04-5): 1C(orange)-1H =S
                         -1S =H
jansma/verhees (02-6): 1C-2C(gf)-4C slamtry

jansma (07-5):
  1D 4+crd
    -1H(=S!)-1S 3-crd
            -1NT 4-5 D-C
            -2C 5-4 D-C
            -2S(4-crd)-2NT(R)-3H max 4-crd S
    -1S(=H!)
    -2H 4-crd S , 5/6-crd H 6-19
    -(1H) see 1C opening
  1D(3rdhand)-1H/S real nf
jansma/verhees (06-2): 1D 5+crd or 4-crd unbal
                         -1H(=S)-3D 6-crd, 3-crd S 15-17
                         -1S(=H)-1NT-2C(transfer)-2D-2NT 4-crd H 11hcp
jansma (04-12): open 1NT w AQJT A2 K9532 KT, problem after 1D(or)-1S(=H)
nn (04-3): 1D 5+crd or 4+ unbal
             -2C inverted m
             -2D multi
             -2H/S invite
bakker (03-12):
  1D 4+-crd D, 5-crd C possible

jansma (07-5):
  1H 11+ 5+crd
  1S 11+ 5+crd
    -1NT-3C/D/H 55 15-17 nf
  1NT 15-17 bal: 4252 15-16 4225/2425
  2C precision (not 5422)
brink (04-10): 1S-2D 5+crd H! 6+hcp
                    -2NT(rf)-3H(nf)-3S(real)
                 -2H 5+crd D! gf
jansma/verhees (04-9): 1S-2C(R)-3S 6115/5116 16-18
                                  -4C asking aces S trump
bakker (04-5): 1S-2D =H
                    -2H/S min
                    -2NT max
                    -3H good H-fit
                 -2H =D
                    -2S min
                    -2NT max
                    -3D good fit
nn (04-4): 1H/S-1NT 6-11 rf
               -2C(R)-2D min no 4-crd other M
                        -2H(R)-2S 4-crd D
                     -2H 4+crd other M
                        -2S(R)-2NT(min)-3C(R)
                        -3C 5-4
                        -3D 6-4
                        -3H 5-5
                     -2S max 4-crd D
                        -2NT(R)
                     -2NT max no otehr 4-crd
                     -3C/D 4-crd max
                     -3H max 5-crd C
               -2D real gf
               -2M 8-10
               -2NT fit
               -3C/D 9-11 6-crd
               -3M weak
           1H-2S 4-8 6-crd
           1S-2H gf
bakker (03-12):
  1H/S 5-crd 11-17
  1NT 15-17 bal
  2C a. 6-crd b. 5-crd + 4-crd H/S 11-16 see precision

Dutch Standard American

niemeijer (04-10): 1H-1S no S!

1NT

niemeijer (14-3): 1H-1NTforcing-2C w AQ96 J9753 A9 QT
niemeijer (04-10): 1H-1NT 5-crd S playing flannery

2-over-1

bakkeren/bertens (05-7): 1S-2D(gf)-2S-3D-4H splinter
lawrence (04-5): 1D-2C(gf)-2D-2NT 10-11 nf!
                          -2H/S gf
                          -2NT 12-14 nf!
                          -3NT 18-19
bakkeren (03-12): 1D-2C(gf)-3C strong

2NT Jacobi

niemeijer (14-2): 1S-2NT-3C/D/H singleton J9763 AT4 AQ32
                        -3S strong KQ9872 K2 A4 K97
                        -3NT 14-16 AQT32 T6 KJ53 A3
                        -4C/D/H void KJT43 KQ42 - AT94
                        4S weak T7632 AK2 KJ5 Q3

Higher Openings

niemeijer (04-10): 2H flannery

Vienna

barendregt/borm/vanderpas (05-1): A=7 K=5 Q=3 J=1, to convert multiply by 5/8
1C=20-27(13-17) 1+crd
  -P=0-11(0-7) length C
  -1D=0-11
     -1H/2D=23-24(14-15) 4+crd
     -1S=23-24 4+crd
        -1NT w 65 JT96 J875 QT2
     -1NT=18-24(11-15)
         -2C/D/H/S 5-crd
     -2C=18-24 5-crd
     -2H/S/NT/3C=25-27(16-17)
  -1H/S/2C/D=12-17(8-11) 4+crd
  -iNT=18+(11+) gf
  -2H/S/3C/D=4-11(3-7) 6-crd or 0-11 7-crd
1D/H/S=20-27 5+crd
      -P=0-11(0-7)
      -support=12-17(8-11) 3+crd
      -newSuit=12-17 5+crd nf
      -1NT=12-17 no 5-crd
      -jumpSupport=18+(11+) gf
      -jumpNew=18+ 5+crd gf
      -2NT=18+ no 5-crd gf
1NT=28-34(18-21)
   -P=0-7(0-4)
   -2C=7-11(4-7)
      -2D=20-21
         -2H/S=0-8(0-5) 4-crd
         -2NT=0-8
         -3x=8-11(5-7)
      -2H/S=28-31(18-19) 4-crd
      -2NT=28-31
      -3C/D=28-31 5-crd
      -3H/S good suit
   -2D=12-20(8-12) no 5-crd M gf
      -2H/S/3C/D 5-crd
      -2NT-3C/D 5-crd
          -3H/S 4-crd
   -2H/S=12-20 5-crd gf
   -2NT=21+(13+)
   -3C/D=12+ strong 5-crd
   -3H/S 6-crd weak
2C/D/H/S 9-tricks
2NT=35+(22+)

AceAsking with 4C unless 4C is invite in C
  next suit is asking for kings
4NT=norman(A=1,K=1/2): 5C=0-1
                       5D=1 1/2
Extensions by vandeven(in 1941):
other suit=exclusion blackwood
1H-3H-4C-4H-4S-4NT no K or singleton S
              -5C SK
              -5D singleton S
1S-(2H)-3C-4H(excl)-5C(2)-5NT asks for SK
                             -6C no
                             -6D yes
after 4C and 5C is a new suit asking for Q or doubleton
1H-3H-4C-4S(2)-5D(K?)-5S(=K)-6D(Q?)-6NT(doubleton)

Fantoni-Nunes

fantoni (13-11): 1H-3H(weak)-3S-4H-4S-4NT no keycard
                                     -5H keycard, no C/D-control
fantoni (06-12):
1C: 14+ rf a. 4+crd b. bal 15-18 c. bal 23-24
  -1D 0-10 4+crd H
  -1H 0-10 4+crd S
  -1S 0-10 no 4-crd M
  -1NT 10+ bal
  -2C/D/H/S 5+crd gf
  -2NT 5-crd M 5332 10-14
      -3C(R)
      -3NT w KQ3 KQT KT3 J984
  -3C 55 C+?
     -3D(?)
  -3D 55 HD
  -3H 55 SH
  -3S 55 SD
1D: 14+ rf a. 4+crd b. 18-20 bal; 1D w 4 AT3 KJT985 A73
  -1H/S 0-9 4-crd
  -1NT 0-9 no 4-crd M
  -2C a. real gf b. 10+ bal c. 7+ 4-crd D
  -2D  0-6 5-crd S 4-crd H
  -2NT 5H/S-332
  -3C 55 CH
  -3D 4+crd preempt
  -3H 55 HS
  -3S 55 CS

  -2H/S 5-crd gf
1H: 5+crd rf 14+, 11+ w 4-crd other M: nv 1H w KJ32 A9763 Q3 J2
  -1S 0-9 4+crd
  -1NT 0-9 no 4-crd M
  -2C a.real gf b.10+ bal c.gf support
     -2D(?)
  -2D 5-crd gf
  -2H 3-7
  -2S 5-crd gf
  -2NT a.7-9 3-crd(5+ w 4-crd) b.support 10+ w singleton
      -3C(?)
  -3C gf 55 CS
  -3D gf 55 DS
1S-1NT 0-9
      -2NT strong 2-suiter
  -2D/H 5-crd gf
  -2S 3-7
  -3C gf 55 CH
  -3D gf 55 DH
1NT 12-14 semi bal, 4441 possible
   -2C-2D no 4-crd M
      -2H/S 4-crd
      -2NT 4:4:4:1
      -3C 4:4:1:4
   -2D-2H-2S(R)-2NT(R)-3C 3:5:1:4 or 5:3:1:4
                         -3D(?)
                      -3D 3:5:4:1 or 5:3:4:1
                         -3H(?)
         -3C/D 5/6-crd + 4-crd H invite
      -2S 4-crd H doubleton C
      -2NT 4-crd H doubleton D
      -3C 4-crd H doubleton S
      -3D 3:4:3:3
2C 5-crd 10-13
  -2D(R)
  -2H/S 5-crd nf
  -2NT 5-crd S 4-crd H 12-13
  -3C preempt
  -3D/H 6-crd invite
2D 5-crd 10-13
  -2H(R)
  -2S 4-crd rf
  -2NT a.weak long C b. gf 5-crd H/S 3 gf 55 HS
  -3C D preempt
  -3D 55 HS invite
  -3H/S 6-crd invite
2H 5-crd 10-13
  -2S(R)
  -2NT 5-crd S invite
  -3C/D 5-crd rf
  -3H preempt
  -3S 6-crd gf
2S 5-crd 10-13
  -2NT(R)
  -3C 5-crd H rf
  -3D 5-crd rf
  -3H 6-crd C rf
  -3S preempt
2NT 21-22

Boring Club

cosijn (04-1): boring club (balanced=boring):
  1C bal 12-18 or 4414
    -P weak, C length
    -1D(4-crdH)-1H no 4-crd H min(12-14), 4-crd S possible
                  -2C check back
               -1S 4-crd, no 4-crd, intermed(15-17) or max (17-18)
               -1NT no 4-crd M intermed
               -2C 4+-crd max, no 3334
               -2D 5-crd max
               -2H 4-crd min
               -2S/3C/D fitbid 15-16
               -2NT 17-18 3343/3334
               -3H 4-crd, 15-16
               -3S/4C/D fitbid 17-18
               -4H 4-crd 17-18
    -1S-1NT-P 5-7 bal
           -2C 0-7 MM
              -2D no 4-crd
              -2H/S 4-crd or 3-crd, doubleton other M
           -2D D, 0-7
           -2H/S 4-crd + 5-crd C invite
           -2NT 10-12
           -3C/D-P 12-14
                -3NT 17-18 or 15-16 w fit
           -3NT 12-14
    -1NT 8-10
    -2C/D 5-crd rf: 7 K82 AQ9864 JT4
    -2H/S s.o.
    -2NT 11-12
    -3C/D preempt
    -3NT 12-14
  1D 4+-crd unbal
  1H/S(5-crd)-2x gf
             -2NT fit, gf
  1NT 5-crd C, unbal, rf
     -(X:t.o.)-3C-3H-3S 4-crd
  2C 19-22 bal
  2D multi
  2H/S muiderberg
  2NT mm C longer than D 10-15