CHEN Dawei · YEH MIX
vs par split: bidding +0.89 · play -0.96
Strength of schedule: opponents averaged +0.32/bd (a tough draw) → opponent-adjusted -1.13/bd
Card play — on target: opening leads 80.0% · declarer play 90.0% · defence 100.0%
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 50.0% (2) | 100.0% (3) |
| Declarer play | 66.7% (3) | 100.0% (7) |
| Defence | 100.0% (5) | 100.0% (6) |
Opening leads by suit led: ♠ 66.7% (3) · ♥ 100.0% (1) · ♣ 100.0% (1)
vs par by strain: NT +0.30 (10) · a suit -0.28 (18)
vs par by level: part-score +0.17 (6) · game -0.14 (22)
By role: declaring -0.70/bd (-2.65 vs par · 17) · defending -2.62/bd (+3.91 vs par · 11)
By vulnerability: vulnerable -2.14/bd (-2.57 vs par · 14) · not vulnerable -0.76/bd (+2.43 vs par · 14)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round of 32 | Y.Zhang | B.Tarnovski – R.Pachtman | Open | 14 | -8.0 | -0.57 | -0.36 |
| Round of 32 | Y.Zhang | D.Filipowicz – K.Martens | Open | 14 | -32.7 | -2.34 | +0.21 |
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 |
|---|---|---|---|---|---|---|---|
| +6.0 | Round of 32 | ERA | 17 | 3NT | ♠2 | = | +0 |
| +4.1 | Round of 32 | ERA | 22 | 4♥ | ♠7 | -1 | +6 |
| +3.9 | Round of 32 | ERA | 28 | 2♥ | ♠5 | +2 | +6 |
| +3.8 | Round of 32 | ERA | 24 | 4♠ | ♣A | = | +0 |
| +2.6 | Round of 32 | ERA | 39 | 2♠ | ♦2 | = | +5 |
| +2.5 | Round of 32 | ERA | 23 | 4♠ | ♦5 | = | +0 |
| +2.5 | Round of 32 | ERA | 41 | 3NT | ♠Q | +3 | +1 |
| +1.9 | Round of 32 | ERA | 30 | 4♠ | ♥2 | = | +3 |
| +0.8 | Round of 32 | ERA | 19 | 3♥ | ♠A | = | +6 |
| +0.3 | Round of 32 | ERA | 27 | 4♥ | ♠K | = | +0 |
| +0.1 | Round of 32 | ERA | 16 | 4♥ | ♦K | = | +0 |
| +0.1 | Round of 32 | ERA | 31 | 2♠ | ♦5 | = | +0 |
| -1.8 | Round of 32 | ERA | 32 | 3NT | ♥10 | +3 | +13 |
| -2.1 | Round of 32 | ERA | 38 | 3NT | ♥7 | -1 | -5 |
| -2.3 | Round of 32 | ERA | 29 | 3NT | ♠10 | +3 | +11 |
| -2.7 | Round of 32 | ERA | 21 | 3NT | ♠3 | = | +0 |
| -2.7 | Round of 32 | ERA | 35 | 3♦ | ♥2 | = | -6 |
| -2.9 | Round of 32 | ERA | 26 | 4♣ | ♦A | +2 | -10 |
| -3.1 | Round of 32 | ERA | 34 | 3NT | ♣10 | -2 | -5 |
| -3.3 | Round of 32 | ERA | 18 | 4♠ | ♥K | +1 | +0 |
| -3.5 | Round of 32 | ERA | 36 | 4♠x | ♥4 | -3 | -2 |
| -4.3 | Round of 32 | ERA | 25 | 4♠ | ♥2 | +1 | +13 |
| -4.4 | Round of 32 | ERA | 40 | 3NT | ♠7 | +1 | +0 |
| -4.6 | Round of 32 | ERA | 33 | 3NT | ♥J | -1 | -12 |
| -5.4 | Round of 32 | ERA | 42 | 4♠ | ♣K | = | +0 |
| -6.0 | Round of 32 | ERA | 15 | 4♥ | ♣Q | -1 | -13 |
| -9.9 | Round of 32 | ERA | 37 | 3NT | ♠4 | +1 | +0 |
| -10.3 | Round of 32 | ERA | 20 | 5♣ | ♠7 | -1 | -13 |