BERKOWITZ David · MARK GORDON
100rank
-9.2Butler · 28 bds
-0.33per board
±4.2swing
+0.21vs par /bd
-1.21adjusted /bd
by round
vs par split: bidding +0.43 · play -0.21
Strength of schedule: opponents averaged -0.88/bd (an easy draw) → opponent-adjusted -1.21/bd
Card play — on target: opening leads 50.0% · declarer play 100.0% · defence 91.7%
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 0.0% (1) | 60.0% (5) |
| Declarer play | 100.0% (2) | 100.0% (5) |
| Defence | 100.0% (3) | 88.9% (9) |
Opening leads by suit led: ♥ 66.7% (3) · ♣ 33.3% (3)
vs par by strain: NT +0.29 (7) · a suit +0.19 (21)
vs par by level: part-score -2.38 (8) · game +1.25 (20)
By role: declaring +0.07/bd (-2.06 vs par · 16) · defending -0.86/bd (+3.25 vs par · 12)
By vulnerability: vulnerable +0.37/bd (+0.86 vs par · 14) · not vulnerable -1.03/bd (-0.43 vs par · 14)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round of 32 | A.Sontag | H.Song – G.Huang | Open | 14 | -4.8 | -0.34 | +0.64 |
| Round of 32 | A.Sontag | H.Song – G.Huang | Open | 14 | -4.4 | -0.31 | -0.21 |
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 |
|---|---|---|---|---|---|---|---|
| +8.4 | Round of 32 | YUETAO OF GUANGZHOU | 7 | 3NT | ♥4 | -1 | +12 |
| +6.1 | Round of 32 | YUETAO OF GUANGZHOU | 15 | 3NT | ♦2 | = | -2 |
| +6.0 | Round of 32 | YUETAO OF GUANGZHOU | 17 | 3NT | ♠5 | = | +0 |
| +5.5 | Round of 32 | YUETAO OF GUANGZHOU | 10 | 3♠ | ♦A | = | +0 |
| +5.4 | Round of 32 | YUETAO OF GUANGZHOU | 24 | 5♣x | ♥K | -3 | +2 |
| +4.1 | Round of 32 | YUETAO OF GUANGZHOU | 20 | 3NT | ♠8 | +4 | +2 |
| +2.5 | Round of 32 | YUETAO OF GUANGZHOU | 23 | 4♠ | ♦3 | = | +0 |
| +1.8 | Round of 32 | YUETAO OF GUANGZHOU | 8 | 5♦ | ♣K | +1 | +11 |
| +1.2 | Round of 32 | YUETAO OF GUANGZHOU | 1 | 5♥ | ♣Q | +1 | +1 |
| +1.1 | Round of 32 | YUETAO OF GUANGZHOU | 6 | 4♠ | ♠3 | +1 | +1 |
| +0.3 | Round of 32 | YUETAO OF GUANGZHOU | 27 | 4♥ | ♦A | = | +0 |
| +0.2 | Round of 32 | YUETAO OF GUANGZHOU | 4 | 4♠ | ♥K | +1 | +13 |
| +0.1 | Round of 32 | YUETAO OF GUANGZHOU | 16 | 4♥ | ♣J | = | +0 |
| -0.3 | Round of 32 | YUETAO OF GUANGZHOU | 12 | 3♦ | ♥2 | -1 | +1 |
| -0.4 | Round of 32 | YUETAO OF GUANGZHOU | 2 | 2NT | ♥4 | = | +0 |
| -0.9 | Round of 32 | YUETAO OF GUANGZHOU | 9 | 2♥ | ♣K | -1 | -1 |
| -1.7 | Round of 32 | YUETAO OF GUANGZHOU | 11 | 2♠ | ♦8 | -1 | -5 |
| -2.1 | Round of 32 | YUETAO OF GUANGZHOU | 28 | 4♥ | ♥4 | = | +0 |
| -2.7 | Round of 32 | YUETAO OF GUANGZHOU | 21 | 3NT | ♥3 | = | +0 |
| -3.3 | Round of 32 | YUETAO OF GUANGZHOU | 18 | 4♠ | ♥A | +1 | +0 |
| -3.5 | Round of 32 | YUETAO OF GUANGZHOU | 26 | 3♣ | ♦A | +2 | -10 |
| -3.6 | Round of 32 | YUETAO OF GUANGZHOU | 5 | 3♠ | ♦3 | +1 | -1 |
| -4.2 | Round of 32 | YUETAO OF GUANGZHOU | 19 | 4♥ | ♣8 | -1 | +2 |
| -4.3 | Round of 32 | YUETAO OF GUANGZHOU | 25 | 5♠ | ♥J | = | +13 |
| -4.7 | Round of 32 | YUETAO OF GUANGZHOU | 14 | 3NT | ♥10 | -1 | -10 |
| -5.7 | Round of 32 | YUETAO OF GUANGZHOU | 3 | 4♥ | ♣4 | -1 | -10 |
| -5.7 | Round of 32 | YUETAO OF GUANGZHOU | 13 | 2♥x | ♣A | -1 | -3 |
| -8.8 | Round of 32 | YUETAO OF GUANGZHOU | 22 | 4♥ | ♣3 | = | -10 |