🇨🇳 CHEN Yanfeng · CHINA
vs par split: bidding +1.57 · play +0.37
Strength of schedule: opponents averaged -0.43/bd (an easy draw) → opponent-adjusted -0.04/bd
Card play — on target: opening leads 84.2% · declarer play 54.5% · defence 85.7%
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 66.7% (6) | 92.3% (13) |
| Declarer play | 50.0% (4) | 57.1% (7) |
| Defence | 83.3% (12) | 86.7% (30) |
Opening leads by suit led: ♠ 50.0% (2) · ♥ 100.0% (3) · ♦ 85.7% (7) · ♣ 85.7% (7)
vs par by strain: NT +0.32 (22) · a suit +2.69 (48)
vs par by level: part-score +2.32 (19) · game +1.40 (43) · slam +4.00 (8)
By role: declaring -0.12/bd (-2.07 vs par · 28) · defending +0.72/bd (+4.62 vs par · 42)
By vulnerability: vulnerable +1.32/bd (+3.46 vs par · 35) · not vulnerable -0.55/bd (+0.43 vs par · 35)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 6 | S.Liu | O.Koivu – A.Aalto | Open | 14 | +17.8 | +1.27 | +4.43 |
| Round 10 | S.Liu | F.Illingworth – S.Shah | Closed | 14 | +1.2 | +0.09 | +2.71 |
| Round 11 | S.Liu | J.Cuervo Lopera – J.Zamora Villamizar | Closed | 14 | -8.3 | -0.59 | -0.43 |
| Round 15 | S.Liu | RIPON RASHEDUL HASAN – B.Saha | Open | 14 | +17.0 | +1.21 | +2.57 |
| Round 16 | S.Liu | A.Askari – S.Macdonald | Closed | 14 | -0.7 | -0.05 | +0.43 |
Every board — best Butler first↑ top
vs par = IMPs this pair scored above (+) or below (−) the board’s double-dummy par — what bidding and play (theirs and the opponents’) added or gave away against perfect play.
| Butler | Round | Opponents | Bd | Contract | Lead | Res | vs par |
|---|---|---|---|---|---|---|---|
| +10.2 | Round 6 | 🇫🇮 FINLAND | 23 | 4♠x | ♣K | -2 | +12 |
| +8.9 | Round 15 | 🇧🇩 BANGLADESH | 7 | 6♣ | ♠A | -4 | +14 |
| +8.4 | Round 10 | 🏴 ENGLAND | 18 | 6♠ | ♣3 | -1 | +17 |
| +7.2 | Round 15 | 🇧🇩 BANGLADESH | 4 | 4♠ | ♣6 | -1 | +12 |
| +7.1 | Round 11 | 🇨🇴 COLOMBIA | 12 | 5♠x | ♥K | -2 | +0 |
| +6.2 | Round 11 | 🇨🇴 COLOMBIA | 13 | 4♥ | ♦4 | -1 | +12 |
| +5.5 | Round 16 | 🇨🇦 CANADA | 21 | 1NT | ♥4 | = | +5 |
| +5.2 | Round 6 | 🇫🇮 FINLAND | 16 | 3♣ | ♣7 | +3 | +13 |
| +5.2 | Round 6 | 🇫🇮 FINLAND | 26 | 4♠ | ♦A | -1 | +12 |
| +4.2 | Round 15 | 🇧🇩 BANGLADESH | 12 | 2♥x | ♦Q | -2 | +2 |
| +4.1 | Round 16 | 🇨🇦 CANADA | 18 | 4♠ | ♦2 | -1 | +5 |
| +3.9 | Round 16 | 🇨🇦 CANADA | 15 | 4♠ | ♦7 | -1 | +10 |
| +3.6 | Round 10 | 🏴 ENGLAND | 21 | 6♠ | ♥3 | +1 | +13 |
| +3.3 | Round 6 | 🇫🇮 FINLAND | 20 | 2♦ | ♠5 | = | +11 |
| +3.3 | Round 15 | 🇧🇩 BANGLADESH | 10 | 4♠ | ♦K | -1 | +12 |
| +3.0 | Round 15 | 🇧🇩 BANGLADESH | 9 | 3NT | ♠6 | -2 | +6 |
| +3.0 | Round 16 | 🇨🇦 CANADA | 23 | 2♣ | ♦2 | -1 | +0 |
| +2.5 | Round 6 | 🇫🇮 FINLAND | 25 | 3♠ | ♥4 | -1 | +5 |
| +2.4 | Round 6 | 🇫🇮 FINLAND | 27 | 4♠ | ♥6 | = | +3 |
| +2.2 | Round 16 | 🇨🇦 CANADA | 25 | 4♥ | ♦K | +1 | +13 |
| +2.0 | Round 6 | 🇫🇮 FINLAND | 28 | 4♥ | ♦2 | = | +0 |
| +1.7 | Round 6 | 🇫🇮 FINLAND | 19 | 6NT | ♠3 | +1 | +1 |
| +1.7 | Round 16 | 🇨🇦 CANADA | 26 | 3NT | ♠4 | +1 | +0 |
| +1.5 | Round 11 | 🇨🇴 COLOMBIA | 7 | 2♣ | ♣J | -1 | +0 |
| +1.4 | Round 10 | 🏴 ENGLAND | 25 | 4♠ | ♥6 | -1 | +5 |
| +1.4 | Round 15 | 🇧🇩 BANGLADESH | 14 | 4♥ | ♥2 | +1 | +0 |
| +1.3 | Round 10 | 🏴 ENGLAND | 27 | 3♥ | ♦Q | -1 | -2 |
| +1.3 | Round 15 | 🇧🇩 BANGLADESH | 3 | 3NT | ♣9 | -1 | +5 |
| +1.1 | Round 10 | 🏴 ENGLAND | 23 | 4♥ | ♠3 | -1 | +1 |
| +1.1 | Round 16 | 🇨🇦 CANADA | 16 | 1NT | ♠6 | +1 | -7 |
| +1.0 | Round 11 | 🇨🇴 COLOMBIA | 11 | 4♥ | ♦A | -2 | +7 |
| +0.9 | Round 11 | 🇨🇴 COLOMBIA | 8 | 2♠ | ♦6 | +1 | +0 |
| +0.8 | Round 10 | 🏴 ENGLAND | 15 | 1NT | ♦4 | +2 | +0 |
| +0.7 | Round 11 | 🇨🇴 COLOMBIA | 4 | 4♠ | ♣4 | +2 | +13 |
| +0.6 | Round 10 | 🏴 ENGLAND | 17 | 3♦ | ♦4 | -1 | -2 |
| +0.2 | Round 10 | 🏴 ENGLAND | 19 | 4♠ | ♦Q | = | -1 |
| +0.2 | Round 15 | 🇧🇩 BANGLADESH | 2 | 3♥ | ♠2 | -1 | +10 |
| +0.2 | Round 15 | 🇧🇩 BANGLADESH | 5 | 4♥ | ♠5 | = | -1 |
| -0.0 | Round 10 | 🏴 ENGLAND | 20 | 2♠ | ♣A | = | +6 |
| -0.0 | Round 10 | 🏴 ENGLAND | 22 | 4♠ | ♥3 | +2 | +1 |
| -0.1 | Round 16 | 🇨🇦 CANADA | 17 | 3NT | ♠4 | = | -1 |
| -0.2 | Round 16 | 🇨🇦 CANADA | 20 | 4♥ | ♣6 | = | +0 |
| -0.4 | Round 6 | 🇫🇮 FINLAND | 24 | 3♠ | ♥K | -2 | +1 |
| -0.5 | Round 15 | 🇧🇩 BANGLADESH | 13 | 4♠ | ♥10 | +1 | -13 |
| -0.6 | Round 11 | 🇨🇴 COLOMBIA | 10 | 6NT | ♣4 | = | +0 |
| -0.7 | Round 6 | 🇫🇮 FINLAND | 22 | 3NT | ♥3 | +1 | +1 |
| -0.9 | Round 11 | 🇨🇴 COLOMBIA | 5 | 1NT | ♦4 | -2 | +0 |
| -1.0 | Round 15 | 🇧🇩 BANGLADESH | 11 | 3NT | ♦4 | +3 | +11 |
| -1.0 | Round 16 | 🇨🇦 CANADA | 27 | 3NT | ♥K | = | +0 |
| -1.3 | Round 16 | 🇨🇦 CANADA | 22 | 3NT | ♣4 | -1 | -10 |
| -1.7 | Round 11 | 🇨🇴 COLOMBIA | 14 | 4♠ | ♦K | +2 | -14 |
| -1.8 | Round 15 | 🇧🇩 BANGLADESH | 8 | 3NT | ♣K | +3 | -1 |
| -1.9 | Round 11 | 🇨🇴 COLOMBIA | 1 | 6♥ | ♠10 | = | +0 |
| -1.9 | Round 11 | 🇨🇴 COLOMBIA | 2 | 1NT | ♥3 | = | +0 |
| -2.1 | Round 6 | 🇫🇮 FINLAND | 15 | 3♥ | ♦10 | = | -7 |
| -2.2 | Round 6 | 🇫🇮 FINLAND | 17 | 3NT | ♠3 | +2 | +10 |
| -2.7 | Round 10 | 🏴 ENGLAND | 16 | 4♠ | ♣4 | = | +0 |
| -2.8 | Round 16 | 🇨🇦 CANADA | 28 | 4♠ | ♣8 | = | +1 |
| -2.9 | Round 11 | 🇨🇴 COLOMBIA | 6 | 5♦ | ♠J | -1 | -6 |
| -3.0 | Round 10 | 🏴 ENGLAND | 24 | 3NT | ♠9 | +1 | +1 |
| -3.1 | Round 10 | 🏴 ENGLAND | 26 | 1NT | ♦4 | +3 | +9 |
| -3.9 | Round 15 | 🇧🇩 BANGLADESH | 1 | 5♦ | ♠A | -2 | -8 |
| -4.3 | Round 6 | 🇫🇮 FINLAND | 21 | 3NT | ♣Q | +1 | +0 |
| -5.0 | Round 6 | 🇫🇮 FINLAND | 18 | 6♦ | ♥3 | = | +0 |
| -5.3 | Round 11 | 🇨🇴 COLOMBIA | 3 | 5♣x | ♣2 | = | -4 |
| -5.5 | Round 15 | 🇧🇩 BANGLADESH | 6 | 6NTx | ♠7 | -1 | -13 |
| -7.4 | Round 10 | 🏴 ENGLAND | 28 | 4♥ | ♠10 | -1 | -10 |
| -7.9 | Round 16 | 🇨🇦 CANADA | 24 | 3NT | ♥7 | -1 | -10 |
| -8.9 | Round 16 | 🇨🇦 CANADA | 19 | 4♥ | ♦4 | = | +0 |
| -10.5 | Round 11 | 🇨🇴 COLOMBIA | 9 | 4♠x | ♣2 | = | -14 |