Top 5 after 13: Systems

[glen]

After 13 rounds in the Open Final we have 5 pairs close to .5 IMPs per board or better:

 

1) +1.13/220bds Brogeland-Lindqvist: 1NT (14)15-17, 1M=5+, 1♦=4+, 1♣=2+ (suspect 3+ or 4-4-3-2 exactly), 2♣=strong (22-23 if bal), 2♦=2-7 6M (5M possible fav) or 24+ Bal, 2M=8-11 6M, 2NT=20-21

 

2) +.77/180bds Bertheau-Nystrom: 1NT 14-16, 4th 15-16, 1st-3rd fav 10-12. 1♣=16+, 1♦=other bal range<16, or 11-15 4M+5+m or a 4-4-4-1. 1M=5+. 2m=11-15, 6+m or 5m+4om 2M=weak, 2NT=12-15 5-5+ minors

 

3) +.48/180bds Khokhlov-Matushko: 1NT 15-17 V or NV3-4, 10-12 NV1-2. 1♣= Either 12-14 Bal OR 11-16 4-4-1-4 OR 17+ Unbal OR 18+ Bal or NV1-2 15-17 Bal, 1♦=4+ 9-16, 1M=5+ 9-16. 2♣=10-16 6♣ OR 5♣+4M, 2♦=6M 3-9, 2M=M+m (3-8 5-4+ NV, 5-9 5-5+ V), 2NT=19-20 NV1-2, Rest 6-10 5-5+ minors

 

4) +.47/180bds Gromov-Dubinin: 1NT 12+-15 1-2, 15-17 3-4. 1♣=16+ (18+ Bal 3-4), 1♦=1-2 4+ Unbal 11-15 (can have longer ♣s), in 3-4 as 1-2 OR 10-14 Bal OR 4-4-1-4 10-15. 1M=5+ 11-15 OR in 1-2 4-4-1-4 11-15. 2♣=11-15 6♣ OR 5♣+4cM, 2♦=5-10 6(5)M, 2M=M+m (3-7 5-4+ NV, 6-10 5-5+ V), 2NT=6-10 5-5+ minors

 

5) +.46/120bds Gromoller-Kirmse: 1NT 11-13, 1♠=5+, 1♥=4+, 1♦=4+, 1♣=3+, 2♣=19-20 Bal OR 25-26 Bal OR any near GF OR GF ♥s OR solid 8-9 tricks, 2♦=weak two in ♥s or any GF not ♥s, 2♥=4-4+ majors 6-11V 5-9NV, 2♠=5+♠s weak, 2NT=21-22 Bal

 

Gromoller-Kirmse use a neat trick 2♣-2♦;-2♥ is 19-20 Bal, 2♣-2♦;-2NT shows ♥s GF or near GF

[glen]

After 16 of 17 rounds in the Open Final we have 7 pairs above .4 IMPs per board:

 

1) +.76/280bds Brogeland-Lindqvist: 1NT (14)15-17, 1M=5+, 1♦=4+, 1♣=2+ (suspect 3+ or 4-4-3-2 exactly), 2♣=strong (22-23 if bal), 2♦=2-7 6M (5M possible fav) or 24+ Bal, 2M=8-11 6M, 2NT=20-21

 

2) +.57/240bds Armstrong-Holland: 1NT 12-14, 1X= 4+ (open lowest 4 except in 3rd can open 4cM), 2♣=23-24 Bal or GF, 2♦/♥/♠=sound except 1 or 3 NV 5+suit 5-9, 2NT=20-22

 

3) +.55/220bds Khokhlov-Matushko: 1NT 15-17 V or NV3-4, 10-12 NV1-2. 1♣= Either 12-14 Bal OR 11-16 4-4-1-4 OR 17+ Unbal OR 18+ Bal or NV1-2 15-17 Bal, 1♦=4+ 9-16, 1M=5+ 9-16. 2♣=10-16 6♣ OR 5♣+4M, 2♦=6M 3-9, 2M=M+m (3-8 5-4+ NV, 5-9 5-5+ V), 2NT=19-20 NV1-2, Rest 6-10 5-5+ minors

 

4) +.48/280bds Brink-Drijver: 1NT 15-17 or 1st fav 9-12. 1M=5+, 1♦=5 or 4-4-4-1 exactly, 1♣=natural or balanced 12-14 or 18-20, 2X=std (2NT=21-23)

 

5) +.44/200bds Karakolev-Danailov: 1NT 14-16, 1♣=16+ (or playing value 14+), 1♦=11-13 BAL OR 10-15 w/o 5cM and not 2♣ opening. 1M=5+ 10-15. 2♣=10-15 6♣ OR 5♣+4cM, 2♦=4-9 6(5)M OR 24+ Bal, 2M=5M+4m 4-9, 2NT=20-21

 

6) +.42/160bds Gromoller-Kirmse: 1NT 11-13, 1♠=5+, 1♥=4+, 1♦=4+, 1♣=3+, 2♣=19-20 Bal OR 25-26 Bal OR any near GF OR GF ♥s OR solid 8-9 tricks, 2♦=weak two in ♥s or any GF not ♥s, 2♥=4-4+ majors 6-11V 5-9NV, 2♠=5+♠s weak, 2NT=21-22 Bal

 

7) +.41/240bds Wladow-Elinescu: 1NT 15-17 (16-17 3/4), 1♣=15/16+ , 1♦=11-15 1+♦ (cc not clear on Bal range but must be 11/12-14 1-2, 12-15 3-4). 1M=5+ 11-15. 2♣=9-14 6♣ OR 5♣+4X, 2♦=18-19 BAL or 6m 14/15-18 or 6M 15-20, 2M=Fav 5M+4m 7-10 Rest 6M 10-14, 2NT=10-14 6♦ OR 5♦+4♣

 

Wladow-Elinescu cc is not too clear - for example they likely do not open all 5♦+4♣ 10-14 with 2NT.

[effervesce]

Of the top 7 pairs we have

 

Four 15-17, one 14-16, one 12-14, one 11-13 1NT opening ranges

Two precision pairs

Two weak/strong 1C openers

Five play 1D as promising 4+, with both precision pairs playing 1D as supernebulous

Three play Muideberg 2M

Three play multi-2D

Six play 2NT as strong balanced

Five play 5 card majors