LIU Chang · CHINA SUN
vs par split: bidding -1.50 · play -2.43
Strength of schedule: opponents averaged +0.36/bd (a tough draw) → opponent-adjusted -1.29/bd
Card play — on target: opening leads 66.7% · declarer play 45.5% · defence 77.8%
Bidding activity — not a pass: 62.7% (52/83)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 100.0% (1) | 50.0% (2) |
| Declarer play | 50.0% (4) | 42.9% (7) |
| Defence | 100.0% (3) | 66.7% (6) |
Opening leads by suit led: ♥ 50.0% (2) · ♦ 100.0% (1)
vs par by strain: NT -2.83 (12) · a suit -4.67 (18)
vs par by level: part-score -2.78 (9) · game -4.32 (19) · slam -5.50 (2)
By role: declaring -1.86/bd (-5.95 vs par · 21) · defending -1.18/bd (+0.78 vs par · 9)
By vulnerability: vulnerable -2.52/bd (-6.57 vs par · 14) · not vulnerable -0.89/bd (-1.62 vs par · 16)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 2 | Y.Zhou | W.Cheung – L.Fung | Open | 10 | -14.6 | -1.46 | -2.90 |
| Round 6 | Y.Zhou | T.Guichet – L.Bonin | Closed | 10 | -29.2 | -2.92 | -6.30 |
| Round 9 | Y.Zhou | C.Bakke – J.Freeman | Open | 10 | -5.8 | -0.58 | -2.60 |
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 |
|---|---|---|---|---|---|---|---|
| +7.5 | Round 6 | FRANCE | 18 | 3NT | ♠J | -5 | +8 |
| +7.4 | Round 9 | WASHED UP | 20 | 3NT | ♥T | +1 | +11 |
| +7.1 | Round 9 | WASHED UP | 16 | 6NT | ♠7 | = | +0 |
| +4.7 | Round 6 | FRANCE | 11 | 5♠x | ♦K | -2 | -3 |
| +3.8 | Round 9 | WASHED UP | 14 | 6♣ | ♥2 | +1 | -11 |
| +2.9 | Round 2 | EXPIRED YOUTH | 1 | 4♥ | ♠4 | +2 | +2 |
| +2.8 | Round 2 | EXPIRED YOUTH | 10 | 3NT | ♠5 | = | +0 |
| +2.2 | Round 9 | WASHED UP | 17 | 4♥ | ♣2 | = | -1 |
| +2.1 | Round 2 | EXPIRED YOUTH | 5 | 2NT | ♥K | -1 | +6 |
| +0.1 | Round 9 | WASHED UP | 11 | 2♠ | ♠T | = | +8 |
| -0.1 | Round 2 | EXPIRED YOUTH | 4 | 5♦ | ♥A | +2 | -13 |
| -0.6 | Round 6 | FRANCE | 12 | 3NT | ♦2 | -1 | -4 |
| -0.9 | Round 2 | EXPIRED YOUTH | 9 | 1♠ | ♥T | -1 | -6 |
| -1.3 | Round 2 | EXPIRED YOUTH | 6 | 4♥ | ♦K | -1 | +1 |
| -1.4 | Round 9 | WASHED UP | 15 | 3♦ | ♥Q | -3 | -1 |
| -1.6 | Round 6 | FRANCE | 20 | 4♠ | ♦K | +1 | -13 |
| -2.1 | Round 6 | FRANCE | 15 | 2♣ | ♥2 | +1 | -7 |
| -2.5 | Round 2 | EXPIRED YOUTH | 7 | 2♥ | ♠K | +1 | -6 |
| -2.7 | Round 9 | WASHED UP | 12 | 1NT | ♦6 | -2 | -6 |
| -2.8 | Round 9 | WASHED UP | 13 | 1NT | ♥7 | = | -11 |
| -4.0 | Round 2 | EXPIRED YOUTH | 8 | 5♦ | ♥K | = | +1 |
| -4.5 | Round 6 | FRANCE | 14 | 4♠ | ♥T | +3 | -2 |
| -5.9 | Round 6 | FRANCE | 13 | 4♥ | ♣T | -2 | -7 |
| -6.6 | Round 2 | EXPIRED YOUTH | 2 | 3♥ | ♦2 | +1 | -2 |
| -7.0 | Round 2 | EXPIRED YOUTH | 3 | 4♠ | ♣Q | -1 | -12 |
| -7.4 | Round 9 | WASHED UP | 18 | 3NT | ♦T | = | -3 |
| -8.3 | Round 6 | FRANCE | 17 | 3NT | ♥Q | -3 | -11 |
| -8.3 | Round 6 | FRANCE | 19 | 3NT | ♣6 | -1 | -12 |
| -10.1 | Round 6 | FRANCE | 16 | 4♠ | ♦Q | -1 | -12 |
| -12.1 | Round 9 | WASHED UP | 19 | 3NT | ♥7 | -1 | -12 |