bidding systeem : C:\TIS\BBN\versions\1.6\BiedermeijerGroen.bbn
 
NT-distribution
 
<4443>
 
 
<4432>
 
 
<5332> 5+ crd C/D
 
Stops all
 
us stop in C us stop in D us stop in H us stop in S
+ 1. Uncontested
The source for this Dutch bidding system can be found at:
http://www.bridge.nl/groepen/Bridgeblad/Bridge_biedermeijergroen.htm
+ 1.1. Openingsbid
1X
 
-
 
hcp 13-21 4+ crd X
1NT
 
-
 
hcp 15-17 'NT-distribution'
2C
 
conventional
 
9+ tricks game forcing
 
 
hcp 23+ 'NT-distribution'
2X
 
-
 
8+ tricks trump X
2NT
 
-
 
hcp 20-22 'NT-distribution'
3X
 
preempt
 
VULN +? hcp 12- 7+ crd X 7+ tricks
 
 
VULN -? hcp 12- 7+ crd X 6+ tricks
4X
 
preempt
 
VULN +? hcp 12- 8+ crd X 8+ tricks
 
 
VULN -? hcp 12- 8+ crd X 7+ tricks
5C/5D
 
preempt
 
hcp 12- 9+ crd C/D { { VULN +? AND 9+ tricks } OR { VULN -? AND 8+ tricks } }
+ 1.2. Answer
+ 1.2.1. 1X
1X
 
 
pass
 
-
 
hcp 5-
1Y
 
round
 
hcp 6+ 4+ crd Y
1NT
 
-
 
hcp 6-9 misses 4+ crd >X
2Y
 
round
 
hcp 10+ 4+ crd Y
2X
 
-
 
hcp 6-9 4+ crd X misses 4+ crd H/S >X
2Z
 
jump; game
 
hcp 13+ 6+ crd Z with hcp 6+
2NT
 
-
 
hcp 10-12 misses 4+ crd H/S
3Z
 
jump; game
 
hcp 13+ 6+ crd Z with hcp 6+
3X
 
-
 
hcp 10-11 4+ crd X misses 4+ crd H/S >X
3NT
 
-
 
hcp 13-15 misses 4+ crd H/S
4X (H/S)
 
-
 
hcp 12-15 4+ crd X
+ 1.2.2. 1SA Complex
1NT
 
 
pass
 
-
 
hcp 8-
2C
 
Stayman
 
hcp 8+ 4 crd H/S
2D
 
-
 
misses 4+ crd H/S
2H
 
-
 
4+ crd H
2S
 
-
 
4+ crd S
2NT
 
-
 
4 crd H 4 crd S
2D
 
Jacoby
 
5+ crd H
2H
 
-
 
.
2H
 
Jacoby
 
5+ crd S
2S
 
-
 
.
2NT
 
-
 
hcp 9 misses 4+ crd H/S
3NT
 
-
 
hcp 10-15 misses 4+ crd H/S
+ 1.2.3. 2K
2C
 
 
2D
 
zwak
 
.
2H/2S
 
-
 
5+ crd H/S with (2+ crd A/K/Q)
2NT
 
-
 
hcp 10+ 'NT-distribution'
3C/3D
 
-
 
5+ crd C/D with (2+ crd A/K/Q)
+ 1.2.4. 2X
2X
 
 
2NT
 
afwijsbod
 
2- crd X
2Y
 
-
 
5+ crd Y with (2+ crd A/K/Q)
3Y
 
-
 
5+ crd Y with (2+ crd A/K/Q)
3X
 
slam interest
 
3+ crd X 3+ tricks
2D
 
 
5D
 
no slam interest
 
3+ crd D us 11 tricks
2H/2S
 
 
4H/S
 
no slam interest
 
3+ crd H/S us 10 tricks
+ 1.2.5. 2NT Complex
2NT
 
 
pass
 
-
 
hcp 3-
3C
 
Stayman
 
hcp 3+ 4 crd H/S
3D
 
-
 
misses 4+ crd H/S
3H
 
-
 
4+ crd H
3S
 
-
 
4+ crd S
3NT
 
-
 
4 crd H 4 crd S
3D
 
Jacoby
 
5+ crd H
3H
 
-
 
.
3H
 
Jacoby
 
5+ crd S
3S
 
-
 
.
3NT
 
-
 
hcp 4-10 misses 4+ crd H/S
+ 1.2.6. Preempts
3C
 
 
3NT
 
-
 
3+ crd C { { VULN +? AND 2+ tricks } OR { VULN -? AND 3+ tricks } } 'Stops all'
4C
 
-
 
3+ crd C 1+ tricks
5C
 
-
 
4+ crd C 2+ tricks
 
 
 
 
 
3D
 
 
3NT
 
-
 
3+ crd D { { VULN +? AND 2+ tricks } OR { VULN -? AND 3+ tricks } } 'Stops all'
4D
 
-
 
3+ crd D 1+ tricks
5D
 
-
 
4+ crd D 2+ tricks
 
 
 
 
 
3H/3S
 
 
4H/S
 
-
 
3+ crd H/S 1+ tricks
+ 1.3. Rebid
+ 1.3.1. Rebid 1X
+ 1.3.1.1. 1X 1Y
1X 1Y
 
 
1Z
 
-
 
hcp 17- 4+ crd Z
1NT
 
-
 
hcp 13-14 misses 4+ crd >=Y
2Z
 
-
 
hcp 17- 4+ crd Z
2X
 
-
 
hcp 15- 6+ crd X
2W
 
reverse
 
hcp 16+ 4+ crd W
2Y
 
-
 
hcp 15- 4+ crd Y
2NT
 
-
 
hcp 18-19 'NT-distribution'
3Z
 
-
 
hcp 18+ 4+ crd Z
3X
 
-
 
hcp 16+ 6+ crd X
3Y
 
-
 
hcp 16-17 4+ crd Y
+ 1.3.1.2. 1X 1SA
1X 1NT
 
 
pass
 
-
 
hcp 15- misses 4+ crd
2Z
 
-
 
hcp 17- 4+ crd Z
2X
 
-
 
hcp 15- 6+ crd X
2W
 
reverse
 
hcp 16+ 4+ crd W
2NT
 
-
 
hcp 16-17
3Z
 
-
 
hcp 18+ 4+ crd Z
3X
 
-
 
hcp 16+ 6+ crd X
3NT
 
-
 
hcp 18-19
+ 2. Contested
+ 2.1. Overcall / double
[1X]
 
 
dbl
 
-
 
hcp 13+ 3+ crd U1 3+ crd U2 3+ crd U3
1U
 
-
 
hcp 6-16 5+ crd U { { VULN +? AND 5+ tricks } OR { VULN -? AND 4+ tricks } }
1NT
 
-
 
hcp 15-17 stop in X 'NT-distribution'
2U
 
-
 
hcp 10-16 5+ crd U { { VULN +? AND 6+ tricks } OR { VULN -? AND 5+ tricks } }
2Z
 
jump
 
hcp 13+ 6+ crd Z with hcp 6+
+ 2.2. Answer to double
[1X] dbl [pass]
 
 
1Y
 
-
 
hcp 8- 3+ crd Y
1NT
 
-
 
hcp 6-9 stop in X
2Z
 
-
 
hcp 8- 3+ crd Z
2Y
 
jump
 
hcp 9+ 3+ crd Y
2NT
 
-
 
hcp 10-11 stop in X