ZHANG Brian · RDFZ B
vs par split: bidding +0.64 · play +0.58
Strength of schedule: opponents averaged +0.17/bd (a tough draw) → opponent-adjusted +0.42/bd
Card play — on target: opening leads 81.0% #67 of 132 · declarer play 84.2% #12 of 132 · defence 89.5% #26 of 132
Bidding activity — not a pass: 39.7% #100 of 132 (73/184)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 71.4% (7) | 85.7% (14) |
| Declarer play | 100.0% (4) | 80.0% (15) |
| Defence | 90.9% (11) | 88.9% (27) |
Opening leads by suit led: ♠ 80.0% (5) · ♥ 87.5% (8) · ♦ 66.7% (3) · ♣ 80.0% (5)
vs par by strain: NT +3.42 (19) · a suit +0.38 (50)
vs par by level: part-score +1.69 (32) · game +0.82 (34) · slam +0.67 (3)
By role: declaring -0.90/bd (-2.06 vs par · 31) · defending +1.22/bd (+3.90 vs par · 38)
By vulnerability: vulnerable +0.27/bd (+1.94 vs par · 35) · not vulnerable +0.25/bd (+0.34 vs par · 35)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | Y.Yang | L.Petelko – K.Retter | Open | 10 | -25.2 | -2.52 | -3.20 |
| Round 2 | Y.Yang | Y.Ni – S.Liu | Open | 10 | +2.3 | +0.23 | +2.00 |
| Round 5 | Y.Yang | M.Chanal – C.Ben Guigui | Closed | 10 | +7.5 | +0.75 | +0.40 |
| Round 7 | Y.Yang | W.Okrzesik – K.Kuflowski | Closed | 10 | -15.6 | -1.56 | -1.90 |
| Round 8 | Y.Yang | K.Noguchi – K.Urano | Open | 10 | +15.2 | +1.52 | +3.70 |
| Round 9 | Y.Yang | P.Hammelev – D.Tylvad | Closed | 10 | +21.0 | +2.10 | +3.70 |
| Round 10 | Y.Yang | B.Ge – K.Ge | Closed | 10 | +13.0 | +1.30 | +3.30 |
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 |
|---|---|---|---|---|---|---|---|
| +14.1 | Round 8 | JAPAN | 2 | 1NTxx | ♠K | -4 | +14 |
| +10.2 | Round 9 | PIDOES | 16 | 7NT | ♥6 | -2 | +17 |
| +9.3 | Round 2 | RDFZ R | 8 | 4♥x | ♣A | -4 | +9 |
| +8.8 | Round 8 | JAPAN | 6 | 4♥x | ♠3 | = | +5 |
| +8.3 | Round 10 | RDFZ G | 23 | 5♦ | ♥A | -2 | +8 |
| +7.9 | Round 8 | JAPAN | 7 | 3♦ | ♦3 | -1 | +13 |
| +7.6 | Round 9 | PIDOES | 18 | 3NT | ♥2 | = | +3 |
| +7.1 | Round 5 | FRANCE 1 | 4 | 3NT | ♠2 | -2 | +7 |
| +7.1 | Round 10 | RDFZ G | 21 | 3NT | ♥8 | -1 | +12 |
| +6.1 | Round 1 | BRIDGECHAMP | 25 | 3NT | ♠A | = | -1 |
| +6.0 | Round 10 | RDFZ G | 30 | 4♠ | ♦J | -1 | +11 |
| +5.6 | Round 9 | PIDOES | 14 | 3NT | ♣2 | +4 | +14 |
| +5.0 | Round 2 | RDFZ R | 1 | 2♠ | ♥A | +4 | +5 |
| +4.9 | Round 5 | FRANCE 1 | 6 | 3NT | ♥7 | +1 | +1 |
| +4.6 | Round 10 | RDFZ G | 27 | 5♣ | ♠A | -3 | +7 |
| +4.3 | Round 10 | RDFZ G | 25 | 3♥ | ♣6 | = | +12 |
| +3.9 | Round 8 | JAPAN | 10 | 3NT | ♥7 | +2 | +1 |
| +3.0 | Round 9 | PIDOES | 12 | 3NT | ♣2 | -2 | +6 |
| +2.7 | Round 7 | POLAND U21 | 22 | 3♥ | ♦A | = | +1 |
| +2.6 | Round 5 | FRANCE 1 | 10 | 4♥ | ♠T | -2 | +8 |
| +2.6 | Round 9 | PIDOES | 17 | 1♦ | ♣2 | +2 | +8 |
| +2.2 | Round 5 | FRANCE 1 | 3 | 1NT | ♥3 | = | +5 |
| +1.8 | Round 5 | FRANCE 1 | 9 | 5♦ | ♣5 | = | -11 |
| +1.7 | Round 10 | RDFZ G | 22 | 3♦ | ♠9 | +2 | +6 |
| +1.4 | Round 7 | POLAND U21 | 28 | 2♠ | ♦A | +1 | +0 |
| +1.3 | Round 9 | PIDOES | 11 | 3♦ | ♣2 | -3 | -7 |
| +1.0 | Round 7 | POLAND U21 | 21 | 2♦ | ♦8 | +1 | +0 |
| +0.7 | Round 5 | FRANCE 1 | 5 | 4♠ | ♥8 | +1 | +0 |
| +0.7 | Round 9 | PIDOES | 15 | 3♦ | ♥Q | -2 | +0 |
| +0.4 | Round 8 | JAPAN | 1 | 2♥ | ♦6 | +1 | +0 |
| +0.3 | Round 1 | BRIDGECHAMP | 22 | 2♥ | ♣Q | -1 | -2 |
| +0.3 | Round 5 | FRANCE 1 | 8 | 1NT | ♦A | -1 | -1 |
| +0.2 | Round 2 | RDFZ R | 3 | 2♠ | ♣Q | +3 | +9 |
| +0.2 | Round 7 | POLAND U21 | 26 | 2♠ | ♥K | +1 | +0 |
| -0.0 | Round 7 | POLAND U21 | 25 | 2♥ | ♣5 | -1 | -1 |
| -0.3 | Round 2 | RDFZ R | 6 | Pass | -4 | ||
| -0.4 | Round 1 | BRIDGECHAMP | 27 | 1♥ | ♠A | -1 | -2 |
| -0.4 | Round 2 | RDFZ R | 7 | 3♠ | ♣K | -1 | +0 |
| -0.5 | Round 1 | BRIDGECHAMP | 30 | 3♦ | ♥8 | +1 | +0 |
| -0.6 | Round 2 | RDFZ R | 2 | 3♦ | ♥K | = | -5 |
| -0.9 | Round 1 | BRIDGECHAMP | 23 | 4♠x | ♣5 | -1 | -8 |
| -0.9 | Round 2 | RDFZ R | 10 | 3NT | ♠7 | = | +0 |
| -1.0 | Round 2 | RDFZ R | 4 | 5♦ | ♥A | +2 | +13 |
| -1.9 | Round 7 | POLAND U21 | 29 | 2♦ | ♣A | = | +0 |
| -2.3 | Round 5 | FRANCE 1 | 7 | 2NT | ♥6 | -1 | +1 |
| -2.3 | Round 9 | PIDOES | 13 | 2♠ | ♥7 | +2 | +10 |
| -2.5 | Round 10 | RDFZ G | 24 | 3NT | ♣3 | -1 | -5 |
| -2.6 | Round 7 | POLAND U21 | 27 | 1NT | ♥7 | -3 | -7 |
| -2.6 | Round 8 | JAPAN | 9 | 2♠ | ♥Q | -2 | +0 |
| -2.7 | Round 10 | RDFZ G | 28 | 3♥ | ♣K | = | -1 |
| -2.8 | Round 5 | FRANCE 1 | 2 | 3♠ | ♥7 | -2 | +5 |
| -2.9 | Round 2 | RDFZ R | 9 | 2♣ | ♠2 | = | +1 |
| -3.0 | Round 8 | JAPAN | 3 | 4♥ | ♣K | -1 | -5 |
| -3.3 | Round 1 | BRIDGECHAMP | 24 | 4♥ | ♠T | = | +0 |
| -3.4 | Round 1 | BRIDGECHAMP | 29 | 3♠ | ♣8 | -1 | -6 |
| -3.6 | Round 7 | POLAND U21 | 30 | 5♦ | ♥K | -1 | -5 |
| -3.8 | Round 9 | PIDOES | 20 | 3NT | ♠3 | = | -10 |
| -3.9 | Round 9 | PIDOES | 19 | 4♠ | ♣2 | +1 | -4 |
| -4.0 | Round 8 | JAPAN | 4 | 3NT | ♦6 | +3 | +12 |
| -4.4 | Round 8 | JAPAN | 5 | 4♥ | ♣3 | +2 | +8 |
| -5.2 | Round 10 | RDFZ G | 26 | 1NT | ♥2 | -3 | -4 |
| -5.5 | Round 7 | POLAND U21 | 23 | 6♥ | ♠6 | -2 | -2 |
| -5.7 | Round 1 | BRIDGECHAMP | 28 | 4♠ | ♥5 | = | -3 |
| -5.9 | Round 8 | JAPAN | 8 | 5♦ | ♥5 | -2 | -11 |
| -6.1 | Round 2 | RDFZ R | 5 | 4♠ | ♥K | -2 | -8 |
| -7.0 | Round 5 | FRANCE 1 | 1 | 5♣ | ♦2 | -1 | -11 |
| -7.3 | Round 7 | POLAND U21 | 24 | 4♠x | ♣A | -1 | -5 |
| -7.5 | Round 1 | BRIDGECHAMP | 26 | 4♠ | ♣K | = | +0 |
| -8.6 | Round 10 | RDFZ G | 29 | 6♠ | ♣A | -2 | -13 |
| -9.9 | Round 1 | BRIDGECHAMP | 21 | 4♠ | ♥J | -1 | -10 |