CHEN Jun · CHINA 2
vs par split: bidding -0.54 · play -0.06
Strength of schedule: opponents averaged +0.11/bd (a tough draw) → opponent-adjusted +0.06/bd
Card play — on target: opening leads 76.9% #118 of 196 · declarer play 75.0% #124 of 196 · defence 89.7% #50 of 196
Bidding activity — not a pass: 45.7% #68 of 196 (90/197)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 33.3% (3) | 90.0% (10) |
| Declarer play | 75.0% (8) | 75.0% (16) |
| Defence | 100.0% (7) | 86.4% (22) |
Opening leads by suit led: ♠ 100.0% (2) · ♥ 66.7% (3) · ♦ 100.0% (4) · ♣ 50.0% (4)
vs par by strain: NT +0.25 (20) · a suit -0.94 (50)
vs par by level: part-score +0.15 (26) · game -0.42 (40) · slam -7.25 (4)
By role: declaring -0.59/bd (-3.37 vs par · 41) · defending +0.71/bd (+3.31 vs par · 29)
By vulnerability: vulnerable +0.72/bd (+0.54 vs par · 35) · not vulnerable -0.83/bd (-1.74 vs par · 35)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | J.Zhang | T.Yang – Y.Han | Closed | 14 | +11.5 | +0.82 | +1.64 |
| Round 3 | J.Zhang | P.Gruenke – D.Von Arnim | Closed | 14 | +3.4 | +0.24 | +1.43 |
| Round 5 | J.Zhang | N.L'Ecuyer – P.Street | Closed | 14 | +16.8 | +1.20 | -1.00 |
| Round 6 | J.Zhang | A.Grossack – L.Lebowitz | Open | 14 | +14.7 | +1.05 | -0.07 |
| Round 8 | J.Zhang | M.Whibley – N.Edgtton | Closed | 14 | -50.3 | -3.59 | -5.00 |
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 |
|---|---|---|---|---|---|---|---|
| +10.3 | Round 1 | PIONEERS | 7 | 5♦x | ♣T | -2 | +12 |
| +9.7 | Round 6 | LEBOWITZ | 16 | 3NT | ♠J | = | +10 |
| +8.7 | Round 3 | DANGERS AND A HAZARD | 13 | 2♦ | ♥Q | -2 | +10 |
| +6.3 | Round 5 | EASY STREET | 9 | 3NT | ♦7 | = | -1 |
| +5.9 | Round 6 | LEBOWITZ | 26 | 4♠ | ♣7 | = | +0 |
| +5.8 | Round 1 | PIONEERS | 9 | 2♥ | ♣T | -2 | +6 |
| +5.8 | Round 6 | LEBOWITZ | 28 | 4♠ | ♦3 | -2 | +13 |
| +5.7 | Round 5 | EASY STREET | 5 | 4♥ | ♠K | -1 | +12 |
| +5.0 | Round 6 | LEBOWITZ | 20 | 5♦ | ♣T | = | +0 |
| +4.9 | Round 3 | DANGERS AND A HAZARD | 6 | 3♦ | ♠6 | +1 | +7 |
| +4.7 | Round 5 | EASY STREET | 6 | 4♠ | ♥A | -2 | -11 |
| +4.5 | Round 1 | PIONEERS | 14 | 5♦ | ♣J | -1 | +5 |
| +4.1 | Round 5 | EASY STREET | 10 | 3NT | ♣6 | +1 | +0 |
| +3.0 | Round 3 | DANGERS AND A HAZARD | 5 | 4♥ | ♠A | = | +0 |
| +3.0 | Round 5 | EASY STREET | 14 | 5♣ | ♥Q | -2 | +5 |
| +2.3 | Round 5 | EASY STREET | 1 | 3♣ | ♠7 | +1 | +0 |
| +2.1 | Round 8 | SHOURIE | 26 | 4♥ | ♣5 | = | +0 |
| +2.0 | Round 1 | PIONEERS | 10 | 2♦ | ♣K | +1 | +1 |
| +1.6 | Round 3 | DANGERS AND A HAZARD | 1 | 2♥ | ♦Q | +2 | +1 |
| +1.5 | Round 8 | SHOURIE | 20 | 1NT | ♣8 | +1 | +0 |
| +1.4 | Round 3 | DANGERS AND A HAZARD | 11 | 2♣ | ♥Q | -1 | -2 |
| +1.3 | Round 5 | EASY STREET | 13 | 3♣ | ♠4 | = | +0 |
| +1.2 | Round 1 | PIONEERS | 6 | 4♠ | ♣A | -2 | +5 |
| +1.2 | Round 6 | LEBOWITZ | 17 | 4♠ | ♦K | +1 | +0 |
| +1.2 | Round 6 | LEBOWITZ | 21 | 2♠ | ♥A | +3 | -5 |
| +1.1 | Round 6 | LEBOWITZ | 23 | 3NT | ♦7 | = | +0 |
| +1.0 | Round 3 | DANGERS AND A HAZARD | 9 | 4♠ | ♣A | -3 | +1 |
| +0.9 | Round 1 | PIONEERS | 4 | 4♠ | ♥K | = | +0 |
| +0.8 | Round 6 | LEBOWITZ | 27 | 4♦ | ♠7 | = | +0 |
| +0.6 | Round 1 | PIONEERS | 2 | 1NT | ♦J | = | +5 |
| +0.6 | Round 8 | SHOURIE | 16 | 3NT | ♦2 | = | +1 |
| +0.4 | Round 3 | DANGERS AND A HAZARD | 14 | 5♠ | ♦3 | = | +0 |
| +0.3 | Round 5 | EASY STREET | 3 | 3NT | ♣3 | = | +1 |
| +0.3 | Round 8 | SHOURIE | 18 | 3NT | ♦3 | +2 | +12 |
| +0.2 | Round 3 | DANGERS AND A HAZARD | 2 | 4♠ | ♥3 | -1 | -5 |
| +0.2 | Round 3 | DANGERS AND A HAZARD | 3 | 2♥ | ♥4 | +2 | -2 |
| +0.0 | Round 8 | SHOURIE | 23 | 2♥ | ♦J | +1 | +0 |
| -0.0 | Round 8 | SHOURIE | 27 | 4♠ | ♣3 | +2 | -11 |
| -0.3 | Round 1 | PIONEERS | 8 | 1NT | ♥4 | = | -1 |
| -0.4 | Round 8 | SHOURIE | 22 | 1NT | ♠6 | = | -1 |
| -0.6 | Round 1 | PIONEERS | 3 | 4♥ | ♣3 | = | +0 |
| -0.6 | Round 3 | DANGERS AND A HAZARD | 4 | 2♣ | ♦7 | +1 | +0 |
| -0.8 | Round 1 | PIONEERS | 1 | 1♠ | ♦K | -1 | -4 |
| -0.8 | Round 6 | LEBOWITZ | 24 | 1NT | ♥2 | = | -7 |
| -0.9 | Round 6 | LEBOWITZ | 25 | 2♠ | ♥3 | = | +1 |
| -1.3 | Round 8 | SHOURIE | 24 | 1NT | ♠6 | +1 | -1 |
| -1.4 | Round 5 | EASY STREET | 2 | 4♠ | ♣K | -1 | +5 |
| -1.5 | Round 5 | EASY STREET | 4 | 4♥ | ♠T | +1 | -13 |
| -1.6 | Round 5 | EASY STREET | 7 | 2♠ | ♣A | = | -6 |
| -1.7 | Round 5 | EASY STREET | 11 | 4♥ | ♠A | +1 | +0 |
| -1.9 | Round 1 | PIONEERS | 5 | 4♥ | ♣4 | -1 | -5 |
| -1.9 | Round 1 | PIONEERS | 13 | 2♠ | ♥4 | +1 | +10 |
| -2.0 | Round 5 | EASY STREET | 12 | 4♠ | ♦4 | +1 | +0 |
| -2.0 | Round 8 | SHOURIE | 28 | 3NT | ♠3 | -1 | -5 |
| -2.1 | Round 3 | DANGERS AND A HAZARD | 10 | 6♠ | ♣K | +1 | +13 |
| -2.4 | Round 6 | LEBOWITZ | 15 | 4♠x | ♥8 | -2 | -5 |
| -2.5 | Round 3 | DANGERS AND A HAZARD | 8 | 2NT | ♠J | -3 | -2 |
| -2.7 | Round 5 | EASY STREET | 8 | 3♥ | ♣A | +1 | -6 |
| -2.7 | Round 6 | LEBOWITZ | 19 | 1NT | ♣7 | +2 | +0 |
| -3.1 | Round 1 | PIONEERS | 11 | 4♠ | ♥K | -1 | -4 |
| -3.3 | Round 6 | LEBOWITZ | 18 | 3NT | ♥2 | = | +0 |
| -3.7 | Round 3 | DANGERS AND A HAZARD | 12 | 4♥ | ♠K | +3 | -10 |
| -5.2 | Round 1 | PIONEERS | 12 | 3NT | ♣7 | -3 | -7 |
| -5.9 | Round 6 | LEBOWITZ | 22 | 3NT | ♠7 | -2 | -8 |
| -6.9 | Round 8 | SHOURIE | 17 | 4♠ | ♦T | +2 | -14 |
| -8.5 | Round 8 | SHOURIE | 21 | 6♥ | ♦7 | +1 | -11 |
| -9.1 | Round 3 | DANGERS AND A HAZARD | 7 | 3NT | ♣5 | +3 | +9 |
| -10.7 | Round 8 | SHOURIE | 15 | 6♥ | ♣J | -1 | -14 |
| -11.0 | Round 8 | SHOURIE | 25 | 5♦ | ♥6 | -5 | -9 |
| -14.0 | Round 8 | SHOURIE | 19 | 7♦ | ♣A | -1 | -17 |