ZHANG Brian · RDFZ B
vs par split: bidding -0.50 · play +0.03
Strength of schedule: opponents averaged +0.57/bd (a tough draw) → opponent-adjusted -0.25/bd
Card play — on target: opening leads 80.0% #14 of 18 · declarer play 100.0% #1 of 18 · defence 77.8% #13 of 18
Bidding activity — not a pass: 42.9% #9 of 18 (39/91)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 75.0% (4) | 83.3% (6) |
| Declarer play | 100.0% (1) | 100.0% (8) |
| Defence | 83.3% (6) | 75.0% (12) |
Opening leads by suit led: ♠ 66.7% (3) · ♥ 100.0% (2) · ♦ 75.0% (4) · ♣ 100.0% (1)
vs par by strain: NT +1.44 (9) · a suit -1.22 (23)
vs par by level: part-score -1.75 (8) · game -0.04 (22) · slam +0.00 (2)
By role: declaring +0.57/bd (-0.93 vs par · 14) · defending -1.91/bd (-0.11 vs par · 18)
By vulnerability: vulnerable -0.82/bd (-1.31 vs par · 16) · not vulnerable -0.82/bd (+0.38 vs par · 16)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | Y.Yang | L.Petelko – K.Retter | Open | 16 | -22.1 | -1.38 | +0.25 |
| Round 2 | Y.Yang | W.Bak – F.Kurlit | Open | 16 | -4.2 | -0.26 | -1.19 |
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 |
|---|---|---|---|---|---|---|---|
| +7.7 | Round 2 | POLAND U21 | 29 | 3NT | ♦Q | = | -13 |
| +6.0 | Round 1 | BRIDGECHAMP | 7 | 3NT | ♦Q | = | -1 |
| +5.3 | Round 2 | POLAND U21 | 18 | 4♥ | ♣J | +1 | +1 |
| +3.7 | Round 1 | BRIDGECHAMP | 10 | 3♣ | ♠A | +1 | +0 |
| +3.7 | Round 1 | BRIDGECHAMP | 12 | 6♦ | ♥A | = | +0 |
| +3.3 | Round 2 | POLAND U21 | 19 | 2♥ | ♦9 | = | +5 |
| +3.0 | Round 2 | POLAND U21 | 24 | 3NT | ♠2 | = | -1 |
| +1.7 | Round 1 | BRIDGECHAMP | 3 | 2♠ | ♥J | = | +0 |
| +1.3 | Round 2 | POLAND U21 | 28 | 2NT | ♠4 | -2 | -1 |
| +0.7 | Round 1 | BRIDGECHAMP | 15 | 3NT | ♥Q | +1 | +13 |
| +0.3 | Round 2 | POLAND U21 | 30 | 1NT | ♣K | = | -5 |
| -0.0 | Round 1 | BRIDGECHAMP | 5 | 4♠ | ♣J | +1 | -4 |
| +0.0 | Round 2 | POLAND U21 | 26 | 4♠ | ♦K | = | +0 |
| +0.0 | Round 2 | POLAND U21 | 32 | 3NT | ♦3 | -1 | +12 |
| -0.3 | Round 1 | BRIDGECHAMP | 1 | 4♠ | ♥3 | = | +0 |
| -0.7 | Round 1 | BRIDGECHAMP | 8 | 4♠ | ♥J | +1 | -4 |
| -0.7 | Round 2 | POLAND U21 | 22 | 4♥x | ♥9 | -3 | +3 |
| -0.7 | Round 2 | POLAND U21 | 27 | 4♥ | ♠6 | -3 | +0 |
| -1.3 | Round 2 | POLAND U21 | 20 | 2♠ | ♥Q | = | -6 |
| -1.7 | Round 2 | POLAND U21 | 23 | 4♥ | ♠A | +1 | -1 |
| -2.3 | Round 1 | BRIDGECHAMP | 14 | 4♠ | ♦Q | = | +0 |
| -2.3 | Round 1 | BRIDGECHAMP | 16 | 3♥ | ♠K | +1 | -7 |
| -2.7 | Round 1 | BRIDGECHAMP | 2 | 5♥x | ♣A | -3 | +4 |
| -3.3 | Round 1 | BRIDGECHAMP | 9 | 2♠ | ♣J | = | +0 |
| -3.7 | Round 2 | POLAND U21 | 17 | 3NT | ♦Q | +1 | +0 |
| -3.7 | Round 2 | POLAND U21 | 21 | 4♥ | ♣J | = | -1 |
| -5.0 | Round 1 | BRIDGECHAMP | 4 | 3NT | ♦7 | +3 | +9 |
| -5.0 | Round 1 | BRIDGECHAMP | 6 | 4♥ | ♠T | -1 | +1 |
| -5.0 | Round 2 | POLAND U21 | 25 | 5♦ | ♥5 | -1 | -10 |
| -8.0 | Round 1 | BRIDGECHAMP | 11 | 4♠ | ♦K | = | -7 |
| -8.3 | Round 1 | BRIDGECHAMP | 13 | 6♣ | ♥J | = | +0 |
| -8.3 | Round 2 | POLAND U21 | 31 | 5♦x | ♥6 | -2 | -2 |