YAMAZAKI Nana · JAPAN
vs par split: bidding -1.23 · play -0.03
Strength of schedule: opponents averaged -0.71/bd (an easy draw) → opponent-adjusted -1.57/bd
Card play — on target: opening leads 85.7% #45 of 89 · declarer play 55.6% #83 of 89 · defence 70.6% #71 of 89
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 50.0% (2) | 100.0% (5) |
| Declarer play | 66.7% (3) | 50.0% (6) |
| Defence | 83.3% (6) | 63.6% (11) |
Opening leads by suit led: ♥ 50.0% (2) · ♦ 100.0% (3) · ♣ 100.0% (2)
vs par by strain: NT -1.73 (11) · a suit -1.00 (19)
vs par by level: part-score -2.00 (13) · game -0.75 (16) · slam +0.00 (1)
By role: declaring -0.79/bd (-3.38 vs par · 13) · defending -0.92/bd (+0.35 vs par · 17)
By vulnerability: vulnerable -0.26/bd (+0.00 vs par · 15) · not vulnerable -1.47/bd (-2.53 vs par · 15)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 2 | Y.Xiao | L.Petelko – K.Retter | Closed | 6 | -8.2 | -1.37 | +0.00 |
| Round 3 | Y.Xiao | L.Topper – J.Rose | Open | 6 | -7.0 | -1.17 | -5.17 |
| Round 6 | Y.Xiao | N.Sotorp – R.Serrano Sotomayor | Open | 6 | -7.0 | -1.17 | -0.67 |
| Round 7 | Y.Xiao | D.Chiang – G.Liu | Closed | 6 | -13.5 | -2.25 | -1.33 |
| Round 8 | Y.Xiao | M.Krasa – C.Romanowski | Closed | 6 | +9.8 | +1.63 | +0.83 |
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 |
|---|---|---|---|---|---|---|---|
| +12.5 | Round 8 | CZECH REPUBLIC A | 13 | 3NT | ♠2 | -4 | +18 |
| +6.8 | Round 7 | MAPLE | 8 | 4♠ | ♥Q | = | +7 |
| +5.2 | Round 2 | KITKUTIM II | 7 | 2♠ | ♣K | +2 | +10 |
| +4.7 | Round 6 | ECUADOR U21 | 3 | 2♠ | ♥J | = | +6 |
| +4.2 | Round 3 | AUSTRALIA | 17 | 4♠ | ♣3 | +1 | +1 |
| +1.9 | Round 2 | KITKUTIM II | 8 | 4♥ | ♦K | = | +0 |
| +1.9 | Round 2 | KITKUTIM II | 10 | 4♠ | ♦7 | -1 | +12 |
| +1.3 | Round 6 | ECUADOR U21 | 5 | 2♠ | ♣6 | -1 | -1 |
| +1.3 | Round 8 | CZECH REPUBLIC A | 15 | 1NT | ♥4 | = | -1 |
| +0.4 | Round 3 | AUSTRALIA | 13 | 4♥ | ♠Q | = | +0 |
| +0.1 | Round 8 | CZECH REPUBLIC A | 14 | 3♦ | ♦6 | -1 | -2 |
| -0.3 | Round 3 | AUSTRALIA | 18 | 3NT | ♠8 | +1 | -12 |
| -0.4 | Round 8 | CZECH REPUBLIC A | 18 | 4♥ | ♦J | = | +0 |
| -0.7 | Round 6 | ECUADOR U21 | 4 | 1NT | ♠2 | -2 | -2 |
| -0.9 | Round 3 | AUSTRALIA | 16 | 3NT | ♠5 | +2 | +0 |
| -1.1 | Round 7 | MAPLE | 11 | 2NT | ♠7 | +1 | -2 |
| -1.3 | Round 7 | MAPLE | 10 | 2♠ | ♦7 | = | -6 |
| -1.8 | Round 8 | CZECH REPUBLIC A | 16 | 3NT | ♦10 | = | -3 |
| -1.9 | Round 2 | KITKUTIM II | 12 | 3♥ | ♦7 | = | -6 |
| -1.9 | Round 8 | CZECH REPUBLIC A | 17 | 3♣ | ♠6 | +3 | -7 |
| -2.9 | Round 6 | ECUADOR U21 | 2 | 3NT | ♥K | = | +1 |
| -2.9 | Round 6 | ECUADOR U21 | 6 | 3NT | ♥A | = | +0 |
| -3.3 | Round 7 | MAPLE | 12 | 3♥ | ♦K | = | -1 |
| -3.7 | Round 7 | MAPLE | 9 | 2♠ | ♦5 | -2 | -6 |
| -4.8 | Round 3 | AUSTRALIA | 15 | 3NT | ♣2 | -1 | -12 |
| -5.6 | Round 3 | AUSTRALIA | 14 | 3♠ | ♥8 | -1 | -8 |
| -6.5 | Round 6 | ECUADOR U21 | 1 | 5♦ | ♠5 | -1 | -8 |
| -6.6 | Round 2 | KITKUTIM II | 11 | 3NT | ♦2 | -2 | -6 |
| -8.7 | Round 2 | KITKUTIM II | 9 | 4♠ | ♥7 | -1 | -10 |
| -10.9 | Round 7 | MAPLE | 7 | 6♠ | ♦J | = | +0 |