Bulgaria - World Championships System Review

Karaivanov-Trendafilov

http://www.worldbridge.org/people/person.asp?qryid=3562
http://www.worldbridge.org/people/person.asp?qryid=3563
Summary: many years of world class experience

Approach: Modified Polish with variable ranges

1C: NV: 15-20 Bal or Cs or any GF, VUL: 12-14/18-20 Bal or Cs or any GF
1D: 4+ except FAV(1/2) can be 12-13 Bal (notes say 11-14 but NT range is 9-12)
1M: 5+
1NT: VUL: 15-17, FAV(1/2): 9-12, Other: 11-14. Singletons possible
2C: 5Cs+4cM or 6+Cs, NV: 10-15, VUL: 15-17
2D: Weak or strong (less than opening or 16+), 4-4+ majors
2M: Weak, 5+ suit
2NT: 20-22
1NT Overcall: 15-17 (14-18)
Jump Overcalls: Preemptive, UNFAV: intermediate
Cues: Highest unbid + other
1X Relays/1C Transfers/Gazzilli: 1C Transfers, 1X-2C Cs or bal

Watch for: 2D Majors, variable ranges, treating 4-4-1-4 11-14 as balanced

Danailov-Karakolev

http://www.worldbridge.org/people/person.asp?qryid=19597
http://www.worldbridge.org/people/person.asp?qryid=15735
Summary: Karakolev: many years of world class experience, Danailov: recent world class experience

Approach: Big Club

1C: 16+ or any good hand 14+
1D: 0+, 10-15, no 5cM, or 11-13 Bal (not clear which hands open 1D if void in Ds)
1M: 5+, 10-15
1NT: 14-16
2C: 5Cs+4cM or 6+Cs, 10-15
2D: Multi: 4-9, 6(5)+ suit or 24+ BAL
2M: Weak, 4-9, 5+M + 4+m, 5-14 (3/4)
2NT: 20-21 (can be semi-bal, can have singleton)
1NT Overcall: 15-18
Jump Overcalls: Weak
Cues: 1M-2M: OM+ m, 1m-2m: Ms (but if m can be 2, natural)
1X Relays/1C Transfers/Gazzilli: None

Watch for: Big Club, Multi, 2M M+m openings

Aronov-Stefanov

http://www.worldbridge.org/people/person.asp?qryid=14095
http://www.worldbridge.org/people/person.asp?qryid=17822
Summary: many years of world class experience

Approach: Big Club

1C: 15+ Unbal/17+ Bal
1D: 0+, 10-15, no 5cM, or 11-13 Bal (not clear which hands open 1D if void in Ds)
1M: 5+, 10-15
1NT: (13)14-16 (semi-bal, singleton possible)
2C: 5Cs+4cM or 6+Cs, 10-15
2D: Multi: 3-10, 6(5)+ suit (no strong option). Weak 3-10 Ms (3/4)
2M: 2H: Weak, 3-10, Ms. 2S: Weak, 3-10, 5+Ss + 4+m. Natural weak (3/4)
2NT: 19-20 (can be semi-bal), 20-21 (3/4)
1NT Overcall: 15-18
Jump Overcalls: Weak
Cues: 1M-2M: OM+ m, 1m-2m: Ms (but if m can be 2, natural)
1X Relays/1C Transfers/Gazzilli: None

Watch for: Big Club, Multi (1/2), 2H Ms (2D in 3/4), 2S S+m