🇺🇸 ZHANG Brian · USA1
7rank
+45.3Butler · 84 bds
+0.54per board
±5.3swing
+0.83vs par /bd · #5/18
+0.05adjusted /bd
by round
vs par split: bidding -1.29 · play -0.96
Strength of schedule: opponents averaged -0.49/bd (an easy draw) → opponent-adjusted +0.05/bd
Card play — on target: opening leads 75.0% #14 of 18 · declarer play 70.0% #14 of 18 · defence 75.0% #13 of 18
Bidding activity — not a pass: 49.3% #4 of 18 (113/229)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 100.0% (1) | 66.7% (3) |
| Declarer play | 100.0% (3) | 57.1% (7) |
| Defence | 100.0% (1) | 71.4% (7) |
Opening leads by suit led: ♠ 100.0% (1) · ♦ 66.7% (3)
vs par by strain: NT +2.26 (23) · a suit +0.29 (61)
vs par by level: part-score -0.76 (29) · game +2.41 (49) · slam -4.33 (6)
By role: declaring +0.68/bd (-0.24 vs par · 49) · defending +0.34/bd (+2.34 vs par · 35)
By vulnerability: vulnerable +0.44/bd (+0.26 vs par · 42) · not vulnerable +0.64/bd (+1.41 vs par · 42)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Quarterfinal | A.Chen | Y.Cheng – C.Chan | Open | 14 | +37.5 | +2.68 | +2.79 |
| Quarterfinal | A.Chen | C.Peng – C.Lu | Open | 14 | +16.9 | +1.21 | +2.29 |
| Semifinal | A.Chen | D.Balof – E.Derman | Open | 14 | +13.1 | +0.94 | +2.93 |
| Semifinal | A.Chen | J.Boge – A.Silverstein | Open | 14 | +6.7 | +0.48 | +1.50 |
| Final | A.Chen | A.Pedmanson – J.Vahk | Closed | 14 | +22.9 | +1.64 | +1.79 |
| Final | A.Chen | A.Pedmanson – J.Vahk | Closed | 14 | -51.8 | -3.70 | -6.29 |
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 |
|---|---|---|---|---|---|---|---|
| +15.0 | Final | 🇪🇪 ESTONIA | 13 | 3NT | ♠K | +1 | +13 |
| +12.9 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 7 | 6♦ | = | +7 | |
| +11.3 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 32 | 5♣ | -1 | +12 | |
| +10.3 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 10 | 3NT | -1 | +12 | |
| +8.7 | Semifinal | 🇺🇸 USA2 | 29 | 6♥ | +1 | -11 | |
| +8.3 | Semifinal | 🇺🇸 USA2 | 13 | 4♠ | = | +10 | |
| +8.3 | Final | 🇪🇪 ESTONIA | 8 | 5♥x | ♦8 | -4 | -5 |
| +7.9 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 12 | 4♠ | -1 | +11 | |
| +7.3 | Final | 🇪🇪 ESTONIA | 20 | 4♠ | ♥A | = | +0 |
| +7.0 | Semifinal | 🇺🇸 USA2 | 2 | 4NT | +2 | +14 | |
| +6.7 | Semifinal | 🇺🇸 USA2 | 38 | 3NT | +1 | +0 | |
| +6.1 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 9 | 3NT | = | +0 | |
| +5.7 | Semifinal | 🇺🇸 USA2 | 9 | 4♠ | +3 | +17 | |
| +5.3 | Final | 🇪🇪 ESTONIA | 24 | 4♠ | ♦A | -1 | +5 |
| +5.0 | Final | 🇪🇪 ESTONIA | 3 | 5♥x | ♦T | = | +5 |
| +4.7 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 11 | 2♥ | +2 | +1 | |
| +4.7 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 29 | 4♥ | +2 | +11 | |
| +4.6 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 1 | 3NT | -2 | +11 | |
| +4.3 | Semifinal | 🇺🇸 USA2 | 36 | 4♥ | -1 | +5 | |
| +4.3 | Final | 🇪🇪 ESTONIA | 5 | 6♥ | ♥2 | = | +0 |
| +3.9 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 36 | 3♠ | -2 | +7 | |
| +3.7 | Final | 🇪🇪 ESTONIA | 6 | 4♥ | ♦5 | +1 | +1 |
| +3.6 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 38 | 2♥ | -1 | +1 | |
| +3.1 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 33 | 4♠ | +2 | -1 | |
| +2.7 | Semifinal | 🇺🇸 USA2 | 34 | 5♦ | = | -2 | |
| +2.0 | Semifinal | 🇺🇸 USA2 | 6 | 4♥ | = | +7 | |
| +1.7 | Semifinal | 🇺🇸 USA2 | 42 | 3NT | +2 | +0 | |
| +1.4 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 37 | 2♣ | +2 | +0 | |
| +1.3 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 13 | 3♥ | +1 | -8 | |
| +1.3 | Semifinal | 🇺🇸 USA2 | 40 | 3NT | +2 | +1 | |
| +1.1 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 8 | 3NT | +1 | +14 | |
| +1.0 | Final | 🇪🇪 ESTONIA | 9 | 3NT | ♥A | -1 | +6 |
| +1.0 | Final | 🇪🇪 ESTONIA | 25 | 4♥ | ♣A | +3 | +2 |
| +1.0 | Final | 🇪🇪 ESTONIA | 28 | 3NT | ♦3 | -1 | -6 |
| +0.7 | Semifinal | 🇺🇸 USA2 | 8 | 3♦ | = | +1 | |
| +0.3 | Semifinal | 🇺🇸 USA2 | 14 | 1NT | -1 | +2 | |
| +0.3 | Semifinal | 🇺🇸 USA2 | 32 | 4♥ | +1 | +11 | |
| +0.3 | Semifinal | 🇺🇸 USA2 | 35 | 6♥ | +1 | +1 | |
| +0.0 | Semifinal | 🇺🇸 USA2 | 1 | 4♠ | +1 | +0 | |
| +0.0 | Semifinal | 🇺🇸 USA2 | 5 | 4♥ | = | +0 | |
| +0.0 | Semifinal | 🇺🇸 USA2 | 37 | 3NT | +1 | +1 | |
| +0.0 | Semifinal | 🇺🇸 USA2 | 39 | 1NT | +1 | +0 | |
| +0.0 | Semifinal | 🇺🇸 USA2 | 41 | 4♥ | +1 | +0 | |
| +0.0 | Final | 🇪🇪 ESTONIA | 7 | 4♠ | ♥9 | +1 | +1 |
| +0.0 | Final | 🇪🇪 ESTONIA | 10 | 3♦ | ♥Q | = | +0 |
| +0.0 | Final | 🇪🇪 ESTONIA | 11 | 3♥ | ♣4 | -2 | +5 |
| +0.0 | Final | 🇪🇪 ESTONIA | 12 | 2♠ | ♦J | -3 | +1 |
| -0.3 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 5 | 3♦ | +1 | +0 | |
| -0.3 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 40 | 2NT | +1 | +6 | |
| -0.3 | Semifinal | 🇺🇸 USA2 | 3 | 2♠ | -1 | +2 | |
| -0.3 | Semifinal | 🇺🇸 USA2 | 10 | 3NT | = | -1 | |
| -0.3 | Semifinal | 🇺🇸 USA2 | 11 | 4♥ | = | -1 | |
| -0.3 | Final | 🇪🇪 ESTONIA | 2 | 2♠ | ♣3 | +1 | -2 |
| -0.3 | Final | 🇪🇪 ESTONIA | 17 | 3♥ | ♣7 | = | +0 |
| -0.4 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 14 | 3NT | +1 | -1 | |
| -0.6 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 30 | 2♦ | +2 | +0 | |
| -0.7 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 41 | 3♦ | +2 | -1 | |
| -0.7 | Final | 🇪🇪 ESTONIA | 19 | 3NT | ♥9 | -2 | -5 |
| -0.7 | Final | 🇪🇪 ESTONIA | 21 | 2♥ | ♠Q | -2 | -11 |
| -0.9 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 6 | 2♦ | -1 | +1 | |
| -1.0 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 39 | 4♠ | -1 | -4 | |
| -1.1 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 31 | 4♠ | +3 | +12 | |
| -1.3 | Final | 🇪🇪 ESTONIA | 16 | 3NT | ♦6 | +2 | +1 |
| -1.4 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 34 | 1NT | = | -5 | |
| -1.7 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 42 | 4♠ | -2 | +0 | |
| -1.7 | Semifinal | 🇺🇸 USA2 | 7 | 1♥x | -1 | +9 | |
| -1.7 | Final | 🇪🇪 ESTONIA | 1 | 3NT | ♦5 | +1 | +0 |
| -1.7 | Final | 🇪🇪 ESTONIA | 4 | 2NT | ♠7 | = | +0 |
| -2.0 | Semifinal | 🇺🇸 USA2 | 12 | 1NT | = | -11 | |
| -2.4 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 2 | 2♥ | = | -5 | |
| -3.0 | Semifinal | 🇺🇸 USA2 | 31 | 3♠ | -1 | +6 | |
| -3.1 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 4 | 4♥ | +2 | -1 | |
| -4.3 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 3 | 4♥ | = | -3 | |
| -4.3 | Quarterfinal | 🇹🇼 CHINESE TAIPEI | 35 | 4♥ | -1 | -6 | |
| -6.3 | Semifinal | 🇺🇸 USA2 | 4 | 3♠ | = | -8 | |
| -6.3 | Semifinal | 🇺🇸 USA2 | 33 | 4♠ | = | +11 | |
| -8.3 | Final | 🇪🇪 ESTONIA | 18 | 6♥ | ♦J | = | -11 |
| -9.3 | Final | 🇪🇪 ESTONIA | 22 | 5♣ | ♦9 | -4 | -15 |
| -10.0 | Semifinal | 🇺🇸 USA2 | 30 | 2♥x | = | -2 | |
| -10.7 | Final | 🇪🇪 ESTONIA | 14 | 4♠x | ♦4 | -2 | +0 |
| -10.7 | Final | 🇪🇪 ESTONIA | 15 | 4♠ | ♥J | -1 | -12 |
| -10.7 | Final | 🇪🇪 ESTONIA | 23 | 2♦ | ♠3 | +2 | -11 |
| -11.7 | Final | 🇪🇪 ESTONIA | 27 | 6♠x | ♠4 | = | -12 |
| -12.7 | Final | 🇪🇪 ESTONIA | 26 | 4♠ | ♣Q | -2 | -13 |