🇨🇳 ZENG Liwei · CHINA
vs par split: bidding -0.56 · play -0.65
Strength of schedule: opponents averaged -0.04/bd (an average draw) → opponent-adjusted -0.94/bd
Card play — on target: opening leads 93.3% · declarer play 70.0% · defence 83.3%
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 80.0% (5) | 100.0% (10) |
| Declarer play | 57.1% (7) | 76.9% (13) |
| Defence | 63.6% (11) | 92.0% (25) |
Opening leads by suit led: ♠ 75.0% (4) · ♥ 100.0% (4) · ♦ 100.0% (2) · ♣ 100.0% (5)
vs par by strain: NT -1.96 (27) · a suit -0.83 (53)
vs par by level: part-score -0.86 (22) · game -0.75 (48) · slam -4.20 (10)
By role: declaring -0.44/bd (-3.34 vs par · 44) · defending -1.46/bd (+1.39 vs par · 36)
By vulnerability: vulnerable -0.01/bd (-0.25 vs par · 40) · not vulnerable -1.79/bd (-2.17 vs par · 40)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | Z.Tan | A.Calmanovici – R.Sau | Closed | 16 | +14.0 | +0.88 | -0.75 |
| Round 3 | Z.Tan | L.Travis – E.Moskovsky | Open | 16 | -49.9 | -3.12 | -0.19 |
| Round 4 | Z.Tan | Y.Goma – T.Kikuchi | Open | 16 | -12.1 | -0.76 | -0.75 |
| Round 8 | Z.Tan | R.Jeng – A.Jeng | Open | 16 | +20.6 | +1.29 | -0.94 |
| Round 16 | Z.Tan | M.Gronkvist – I.Gronkvist | Open | 16 | -44.6 | -2.79 | -3.44 |
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 |
|---|---|---|---|---|---|---|---|
| +12.3 | Round 8 | 🇺🇸 USA1 | 7 | 4♥ | ♣8 | -1 | +12 |
| +9.9 | Round 16 | 🇸🇪 SWEDEN | 9 | 3NT | ♦3 | +1 | +0 |
| +9.2 | Round 4 | 🇯🇵 JAPAN | 1 | 6♣ | ♥3 | = | +10 |
| +9.2 | Round 8 | 🇺🇸 USA1 | 15 | 4♠ | ♠3 | -2 | +13 |
| +7.2 | Round 8 | 🇺🇸 USA1 | 3 | 4♥ | ♠3 | = | +10 |
| +6.7 | Round 4 | 🇯🇵 JAPAN | 7 | 1NT | ♣3 | -2 | +7 |
| +6.6 | Round 1 | 🇮🇹 ITALY | 10 | 4♥ | ♠7 | +2 | +1 |
| +6.5 | Round 1 | 🇮🇹 ITALY | 16 | 4♥ | ♦7 | +1 | +1 |
| +6.1 | Round 1 | 🇮🇹 ITALY | 12 | 3NT | ♥5 | = | -1 |
| +6.1 | Round 1 | 🇮🇹 ITALY | 13 | 6♥ | ♠A | = | +0 |
| +5.2 | Round 8 | 🇺🇸 USA1 | 4 | 3♥ | ♦4 | = | +0 |
| +5.1 | Round 4 | 🇯🇵 JAPAN | 11 | 3NT | ♥Q | -3 | +11 |
| +5.1 | Round 8 | 🇺🇸 USA1 | 13 | 3NT | ♠K | = | -1 |
| +4.6 | Round 4 | 🇯🇵 JAPAN | 6 | 5♠ | ♦Q | = | +0 |
| +3.8 | Round 4 | 🇯🇵 JAPAN | 10 | 2♦ | ♠K | = | +5 |
| +3.3 | Round 1 | 🇮🇹 ITALY | 7 | 4♥ | ♠7 | +1 | +1 |
| +3.3 | Round 1 | 🇮🇹 ITALY | 8 | 4♠ | ♥4 | -2 | +6 |
| +3.1 | Round 3 | 🇦🇺 AUSTRALIA | 5 | 2♠ | ♦5 | +2 | +6 |
| +2.5 | Round 16 | 🇸🇪 SWEDEN | 4 | 3NT | ♠3 | +3 | +1 |
| +2.4 | Round 3 | 🇦🇺 AUSTRALIA | 1 | 3NT | ♣K | +1 | +1 |
| +2.3 | Round 4 | 🇯🇵 JAPAN | 4 | 5♣ | ♠2 | -2 | +8 |
| +2.3 | Round 8 | 🇺🇸 USA1 | 14 | 3NT | ♥Q | -2 | +0 |
| +2.2 | Round 3 | 🇦🇺 AUSTRALIA | 6 | 4♥x | ♠A | -1 | +7 |
| +2.1 | Round 1 | 🇮🇹 ITALY | 9 | 3♥ | ♠6 | -1 | -2 |
| +1.7 | Round 8 | 🇺🇸 USA1 | 12 | 2NT | ♥3 | = | +5 |
| +1.3 | Round 3 | 🇦🇺 AUSTRALIA | 15 | 3♥ | ♠K | = | +0 |
| +1.2 | Round 16 | 🇸🇪 SWEDEN | 11 | 4♥ | ♣4 | = | -11 |
| +1.1 | Round 1 | 🇮🇹 ITALY | 15 | 2♣ | ♥K | = | +0 |
| +1.0 | Round 8 | 🇺🇸 USA1 | 5 | 3♥ | ♦6 | = | +0 |
| +0.9 | Round 4 | 🇯🇵 JAPAN | 2 | 4♠ | ♣J | +1 | +0 |
| +0.8 | Round 1 | 🇮🇹 ITALY | 6 | 3NT | ♥6 | +1 | +0 |
| +0.8 | Round 4 | 🇯🇵 JAPAN | 13 | 3NT | ♠J | +3 | +1 |
| +0.5 | Round 4 | 🇯🇵 JAPAN | 8 | 2♠ | ♦K | +1 | -7 |
| +0.3 | Round 1 | 🇮🇹 ITALY | 4 | 4NT | ♦10 | = | -1 |
| +0.3 | Round 16 | 🇸🇪 SWEDEN | 3 | 4♥ | ♠J | -1 | -2 |
| +0.1 | Round 8 | 🇺🇸 USA1 | 16 | 3NT | ♥5 | +1 | -1 |
| -0.6 | Round 3 | 🇦🇺 AUSTRALIA | 14 | 1NT | ♥2 | = | +0 |
| -0.9 | Round 16 | 🇸🇪 SWEDEN | 15 | 3NT | ♣3 | +1 | +0 |
| -1.3 | Round 16 | 🇸🇪 SWEDEN | 12 | 2♥ | ♣7 | -3 | -3 |
| -1.4 | Round 8 | 🇺🇸 USA1 | 2 | 4♠ | ♦2 | +2 | -5 |
| -1.5 | Round 16 | 🇸🇪 SWEDEN | 13 | 4♥ | ♠J | -4 | +6 |
| -1.7 | Round 8 | 🇺🇸 USA1 | 10 | 3♠ | ♥T | -1 | -5 |
| -1.7 | Round 16 | 🇸🇪 SWEDEN | 16 | 2NT | ♠3 | +2 | -1 |
| -1.8 | Round 3 | 🇦🇺 AUSTRALIA | 11 | 4♥ | ♦2 | -2 | +0 |
| -2.1 | Round 8 | 🇺🇸 USA1 | 11 | 6♥ | ♣8 | +1 | -11 |
| -2.5 | Round 8 | 🇺🇸 USA1 | 9 | 3♠ | ♥A | = | -6 |
| -2.7 | Round 3 | 🇦🇺 AUSTRALIA | 2 | 3NT | ♣7 | +1 | -1 |
| -2.7 | Round 3 | 🇦🇺 AUSTRALIA | 4 | 1NT | ♦4 | +1 | -6 |
| -2.8 | Round 1 | 🇮🇹 ITALY | 11 | 1NT | ♦2 | -2 | -5 |
| -3.1 | Round 4 | 🇯🇵 JAPAN | 15 | 4♥ | ♥4 | = | +0 |
| -3.3 | Round 4 | 🇯🇵 JAPAN | 12 | 2♠ | ♦9 | +4 | -5 |
| -3.3 | Round 4 | 🇯🇵 JAPAN | 16 | 5♣ | ♦K | +2 | -10 |
| -3.3 | Round 16 | 🇸🇪 SWEDEN | 6 | 6♣ | ♣3 | = | +11 |
| -3.4 | Round 1 | 🇮🇹 ITALY | 1 | 3♣ | ♠J | -3 | -2 |
| -3.4 | Round 8 | 🇺🇸 USA1 | 8 | 4♥ | ♣J | +1 | +0 |
| -3.5 | Round 1 | 🇮🇹 ITALY | 5 | 4♥ | ♣9 | +1 | +0 |
| -3.5 | Round 3 | 🇦🇺 AUSTRALIA | 10 | 2♥ | ♠10 | = | +0 |
| -3.6 | Round 1 | 🇮🇹 ITALY | 2 | 1NT | ♣10 | = | +0 |
| -4.1 | Round 4 | 🇯🇵 JAPAN | 14 | 6♥ | ♠K | -1 | -11 |
| -4.2 | Round 1 | 🇮🇹 ITALY | 14 | 5NT | ♣6 | -1 | -10 |
| -4.3 | Round 16 | 🇸🇪 SWEDEN | 14 | 6♥ | ♦K | -4 | -15 |
| -4.6 | Round 3 | 🇦🇺 AUSTRALIA | 13 | 5♦ | ♣10 | +1 | +13 |
| -4.6 | Round 16 | 🇸🇪 SWEDEN | 5 | 3NT | ♣7 | +2 | -1 |
| -4.7 | Round 1 | 🇮🇹 ITALY | 3 | 3♠ | ♦6 | = | +0 |
| -5.5 | Round 3 | 🇦🇺 AUSTRALIA | 7 | 4♠ | ♥2 | -1 | -6 |
| -5.5 | Round 8 | 🇺🇸 USA1 | 6 | 3NT | ♠5 | -1 | -12 |
| -5.7 | Round 3 | 🇦🇺 AUSTRALIA | 9 | 4♠ | ♥Q | -1 | +2 |
| -5.9 | Round 4 | 🇯🇵 JAPAN | 9 | 4♥ | ♠K | = | +0 |
| -5.9 | Round 16 | 🇸🇪 SWEDEN | 10 | 4♥ | ♣K | +1 | +0 |
| -6.1 | Round 3 | 🇦🇺 AUSTRALIA | 16 | 6NT | ♠Q | = | +0 |
| -6.5 | Round 3 | 🇦🇺 AUSTRALIA | 3 | 3NT | ♣J | -1 | -5 |
| -6.9 | Round 8 | 🇺🇸 USA1 | 1 | 4♠ | ♥K | -1 | -14 |
| -7.4 | Round 16 | 🇸🇪 SWEDEN | 2 | 4♥ | ♦Q | +1 | -4 |
| -8.3 | Round 16 | 🇸🇪 SWEDEN | 7 | 3NT | ♦9 | -2 | -13 |
| -8.5 | Round 4 | 🇯🇵 JAPAN | 5 | 7♠ | ♦K | = | +0 |
| -9.0 | Round 3 | 🇦🇺 AUSTRALIA | 8 | 5♦x | ♥A | -2 | -9 |
| -9.3 | Round 16 | 🇸🇪 SWEDEN | 8 | 4♥ | ♣K | -1 | -10 |
| -10.0 | Round 16 | 🇸🇪 SWEDEN | 1 | 5♥x | ♠K | = | -13 |
| -10.2 | Round 3 | 🇦🇺 AUSTRALIA | 12 | 6♦x | ♣K | = | -5 |
| -17.8 | Round 4 | 🇯🇵 JAPAN | 3 | 7NTx | ♦Q | -2 | -21 |