🇺🇸 CHANG Sophia · USA
vs par split: bidding +0.36 · play -0.02
Strength of schedule: opponents averaged +1.03/bd (a tough draw) → opponent-adjusted +0.51/bd
Card play — on target: opening leads 81.8% · declarer play 85.7% · defence 87.0%
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 75.0% (4) | 85.7% (7) |
| Declarer play | 100.0% (1) | 83.3% (6) |
| Defence | 66.7% (6) | 94.1% (17) |
Opening leads by suit led: ♠ 100.0% (1) · ♥ 50.0% (4) · ♦ 100.0% (4) · ♣ 100.0% (2)
vs par by strain: NT +1.61 (13) · a suit -0.24 (29)
vs par by level: part-score +1.18 (17) · game -0.83 (23) · slam +6.50 (2)
By role: declaring +1.45/bd (-0.32 vs par · 19) · defending -2.16/bd (+0.87 vs par · 23)
By vulnerability: vulnerable +1.08/bd (+1.52 vs par · 21) · not vulnerable -2.13/bd (-0.86 vs par · 21)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Quarterfinal | L.Zhang | B.Fu – X.Li | Open | 14 | -0.6 | -0.04 | +1.21 |
| Quarterfinal | L.Zhang | X.Ni – C.Hu | Closed | 14 | -23.4 | -1.67 | -1.36 |
| Quarterfinal | L.Zhang | X.Ni – C.Hu | Closed | 14 | +2.0 | +0.14 | +1.14 |
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 |
|---|---|---|---|---|---|---|---|
| +9.6 | Quarterfinal | 🇨🇳 CHINA | 44 | 3NT | ♠5 | = | +7 |
| +7.0 | Quarterfinal | 🇨🇳 CHINA | 18 | 4♠ | ♥6 | = | +0 |
| +6.3 | Quarterfinal | 🇨🇳 CHINA | 29 | 3NT | ♥3 | +1 | +7 |
| +5.7 | Quarterfinal | 🇨🇳 CHINA | 53 | 2♠ | ♣7 | = | +11 |
| +5.6 | Quarterfinal | 🇨🇳 CHINA | 34 | 6NT | ♦4 | -1 | +13 |
| +5.1 | Quarterfinal | 🇨🇳 CHINA | 46 | 4♠ | ♣8 | +1 | +11 |
| +4.7 | Quarterfinal | 🇨🇳 CHINA | 21 | 2♠ | ♠3 | +2 | +1 |
| +4.6 | Quarterfinal | 🇨🇳 CHINA | 24 | 3♥ | ♦10 | -1 | +5 |
| +4.4 | Quarterfinal | 🇨🇳 CHINA | 23 | 4♠ | ♥9 | -1 | +5 |
| +4.4 | Quarterfinal | 🇨🇳 CHINA | 41 | 2NT | ♠2 | = | +6 |
| +4.1 | Quarterfinal | 🇨🇳 CHINA | 52 | 3NT | ♣10 | = | +0 |
| +2.3 | Quarterfinal | 🇨🇳 CHINA | 19 | 2♠ | ♥9 | -3 | +5 |
| +2.3 | Quarterfinal | 🇨🇳 CHINA | 55 | 2NT | ♥3 | +1 | +10 |
| +1.6 | Quarterfinal | 🇨🇳 CHINA | 38 | 4♠ | ♠3 | = | +0 |
| +1.0 | Quarterfinal | 🇨🇳 CHINA | 54 | 2♦ | ♣5 | +1 | +0 |
| +0.1 | Quarterfinal | 🇨🇳 CHINA | 25 | 3♥x | ♠5 | -1 | -1 |
| -0.0 | Quarterfinal | 🇨🇳 CHINA | 17 | 4♠ | ♣A | +1 | +0 |
| -0.6 | Quarterfinal | 🇨🇳 CHINA | 33 | 3♠ | ♣3 | -1 | -10 |
| -0.6 | Quarterfinal | 🇨🇳 CHINA | 50 | 5♥x | ♠K | -2 | +5 |
| -0.6 | Quarterfinal | 🇨🇳 CHINA | 56 | 3NT | ♥4 | +3 | -11 |
| -0.7 | Quarterfinal | 🇨🇳 CHINA | 37 | 3♥ | ♦A | -2 | -6 |
| -0.9 | Quarterfinal | 🇨🇳 CHINA | 20 | 1NT | ♣4 | -1 | +4 |
| -0.9 | Quarterfinal | 🇨🇳 CHINA | 30 | 2♠ | ♥4 | +1 | +0 |
| -1.0 | Quarterfinal | 🇨🇳 CHINA | 47 | 2♠ | ♥10 | +2 | +6 |
| -1.0 | Quarterfinal | 🇨🇳 CHINA | 48 | 4♥ | ♠K | = | -11 |
| -1.6 | Quarterfinal | 🇨🇳 CHINA | 16 | 5♦ | ♣K | -2 | +0 |
| -1.6 | Quarterfinal | 🇨🇳 CHINA | 26 | 3NT | ♥Q | -1 | +3 |
| -1.7 | Quarterfinal | 🇨🇳 CHINA | 15 | 4♠ | ♣5 | +1 | +0 |
| -1.7 | Quarterfinal | 🇨🇳 CHINA | 28 | 3NT | ♥4 | +3 | -1 |
| -1.7 | Quarterfinal | 🇨🇳 CHINA | 40 | 3NT | ♦5 | -1 | +10 |
| -1.7 | Quarterfinal | 🇨🇳 CHINA | 45 | 2♠ | ♣A | +2 | +10 |
| -2.7 | Quarterfinal | 🇨🇳 CHINA | 35 | 4♠ | ♠A | +2 | -1 |
| -2.9 | Quarterfinal | 🇨🇳 CHINA | 49 | 3♠ | ♦A | -1 | -6 |
| -3.1 | Quarterfinal | 🇨🇳 CHINA | 36 | 4♦ | ♣8 | +1 | -4 |
| -4.3 | Quarterfinal | 🇨🇳 CHINA | 32 | 3NT | ♥5 | +2 | -16 |
| -5.1 | Quarterfinal | 🇨🇳 CHINA | 22 | 4♠ | ♥A | -1 | -4 |
| -6.9 | Quarterfinal | 🇨🇳 CHINA | 43 | 4♠x | ♥A | = | -5 |
| -7.1 | Quarterfinal | 🇨🇳 CHINA | 39 | 4♠ | ♥J | = | +0 |
| -9.9 | Quarterfinal | 🇨🇳 CHINA | 42 | 4♥ | ♥9 | +1 | -7 |
| -10.3 | Quarterfinal | 🇨🇳 CHINA | 31 | 3NT | ♥7 | +1 | -11 |
| -11.1 | Quarterfinal | 🇨🇳 CHINA | 27 | 6♠ | ♠3 | = | +0 |
| -11.1 | Quarterfinal | 🇨🇳 CHINA | 51 | 3♣x | ♠Q | = | -11 |