BERKOWITZ David · GORDON
377rank
-37.0Butler · 80 bds
-0.46per board
±4.5swing
-0.82vs par /bd · #415/466
-0.51adjusted /bd
by round
vs par split: bidding -0.99 · play +0.16
Strength of schedule: opponents averaged -0.05/bd (an average draw) → opponent-adjusted -0.51/bd
Card play — on target: opening leads 83.3% #180 of 466 · declarer play 72.0% #241 of 466 · defence 100.0% #1 of 466
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 83.3% (6) | 83.3% (6) |
| Declarer play | 100.0% (4) | 66.7% (21) |
| Defence | 100.0% (13) | 100.0% (20) |
Opening leads by suit led: ♠ 83.3% (6) · ♥ 100.0% (3) · ♦ 0.0% (1) · ♣ 100.0% (2)
vs par by strain: NT +0.04 (24) · a suit -1.20 (56)
vs par by level: part-score -1.10 (29) · game -0.12 (42) · slam -3.22 (9)
By role: declaring -0.86/bd (-3.25 vs par · 47) · defending +0.10/bd (+2.64 vs par · 33)
By vulnerability: vulnerable -0.43/bd (-0.85 vs par · 41) · not vulnerable -0.50/bd (-0.80 vs par · 39)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | A.Sontag | I.Bjorkan – R.Olsen | Open | 10 | -19.3 | -1.93 | -3.30 |
| Round 2 | A.Sontag | D.Hoffman – S.Picus | Closed | 10 | +4.8 | +0.48 | -1.20 |
| Round 4 | A.Sontag | I.Yadlin – D.Yadlin | Open | 10 | +10.2 | +1.02 | +1.20 |
| Round 5 | A.Sontag | K.Lunna – P.Eide | Open | 10 | -7.6 | -0.76 | +1.00 |
| Round 7 | A.Sontag | H.Kreuning – S.Ouda | Open | 10 | +11.7 | +1.17 | +0.10 |
| Round 8 | A.Sontag | J.Piekarek – A.Smirnov | Closed | 10 | -23.2 | -2.32 | -3.30 |
| Round 9 | A.Sontag | L.Brede – E.Banaszkiewicz | Closed | 10 | +5.5 | +0.55 | +2.30 |
| Round 10 | A.Sontag | K.Hegge – K.Ellingsen | Open | 10 | -19.1 | -1.91 | -3.40 |
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 |
|---|---|---|---|---|---|---|---|
| +14.9 | Round 9 | SIN DEUT | 28 | 7♠ | ♣5 | = | +13 |
| +9.3 | Round 4 | LEVY STERN | 7 | 4♥ | ♥5 | = | +0 |
| +8.8 | Round 7 | STAR | 7 | 3NT | ♥10 | = | +0 |
| +7.7 | Round 2 | HOFFMAN | 14 | 2♦x | ♥10 | -4 | -3 |
| +7.2 | Round 9 | SIN DEUT | 29 | 3NT | ♥7 | -1 | +12 |
| +5.9 | Round 10 | NORWAY JUNIORS BLUE | 8 | 3NT | ♥Q | -2 | +11 |
| +5.6 | Round 4 | LEVY STERN | 9 | 2♣ | ♦J | -1 | +11 |
| +5.5 | Round 5 | RASEDYRA | 13 | 4♠ | ♥Q | = | +0 |
| +5.5 | Round 7 | STAR | 6 | 2♥ | ♠2 | +2 | +7 |
| +5.4 | Round 7 | STAR | 10 | 2♥ | ♣2 | +1 | +7 |
| +4.5 | Round 8 | GERMANY OPEN | 16 | 4♠ | ♠8 | = | +0 |
| +4.2 | Round 1 | ZURZITZ | 3 | 6NT | ♦5 | = | +0 |
| +3.9 | Round 2 | HOFFMAN | 19 | 5♣ | ♦K | -2 | +2 |
| +2.9 | Round 4 | LEVY STERN | 10 | 1NTx | ♦J | = | +3 |
| +2.8 | Round 9 | SIN DEUT | 24 | 2♦ | ♦Q | -1 | +5 |
| +2.4 | Round 9 | SIN DEUT | 21 | 1NT | ♥2 | -1 | +4 |
| +2.2 | Round 8 | GERMANY OPEN | 11 | 4♥ | ♠3 | -1 | +10 |
| +2.1 | Round 10 | NORWAY JUNIORS BLUE | 7 | 6♥ | ♦3 | = | +0 |
| +1.8 | Round 8 | GERMANY OPEN | 20 | 4♥ | ♠Q | -1 | -1 |
| +1.7 | Round 5 | RASEDYRA | 18 | 3NT | ♦3 | -2 | +6 |
| +1.5 | Round 1 | ZURZITZ | 9 | 4♠ | ♣6 | -3 | -3 |
| +1.1 | Round 5 | RASEDYRA | 16 | 2♠ | ♣Q | = | +0 |
| +1.0 | Round 2 | HOFFMAN | 12 | 4♠ | ♥3 | = | -1 |
| +0.9 | Round 1 | ZURZITZ | 10 | 3♦ | ♦J | +1 | +0 |
| +0.8 | Round 10 | NORWAY JUNIORS BLUE | 5 | 4♠ | ♣K | = | +0 |
| +0.6 | Round 4 | LEVY STERN | 8 | 2♠ | ♥6 | -2 | -8 |
| +0.4 | Round 2 | HOFFMAN | 13 | 1NT | ♦Q | +1 | +0 |
| +0.4 | Round 10 | NORWAY JUNIORS BLUE | 3 | 3NT | ♦4 | +1 | +1 |
| +0.3 | Round 9 | SIN DEUT | 27 | 4♠ | ♦5 | +1 | +0 |
| +0.2 | Round 2 | HOFFMAN | 17 | 3NT | ♣6 | +3 | -11 |
| +0.1 | Round 1 | ZURZITZ | 1 | 3♦ | ♣K | = | +1 |
| +0.1 | Round 2 | HOFFMAN | 20 | 1NT | ♥3 | +1 | +0 |
| -0.0 | Round 4 | LEVY STERN | 6 | 3NT | ♥10 | = | +0 |
| +0.0 | Round 7 | STAR | 1 | 3NT | ♠2 | = | +2 |
| +0.0 | Round 9 | SIN DEUT | 25 | 4♠ | ♥3 | +2 | +13 |
| -0.1 | Round 10 | NORWAY JUNIORS BLUE | 1 | 4♠ | ♣6 | = | +0 |
| -0.2 | Round 5 | RASEDYRA | 12 | 3♦ | ♣Q | -1 | -2 |
| -0.2 | Round 7 | STAR | 5 | 4♠ | ♠10 | +2 | +13 |
| -0.2 | Round 7 | STAR | 9 | 3♣ | ♦2 | +3 | -10 |
| -0.3 | Round 7 | STAR | 2 | 3NT | ♥2 | = | +1 |
| -0.4 | Round 1 | ZURZITZ | 8 | 2♥ | ♣Q | -1 | -4 |
| -0.5 | Round 4 | LEVY STERN | 4 | 4♠x | ♣A | -1 | +12 |
| -0.6 | Round 10 | NORWAY JUNIORS BLUE | 6 | 4♠ | ♦4 | +1 | -11 |
| -0.8 | Round 2 | HOFFMAN | 15 | 3NT | ♠K | = | +0 |
| -0.8 | Round 4 | LEVY STERN | 2 | 4♥ | ♠6 | = | +3 |
| -0.8 | Round 7 | STAR | 3 | 4♥ | ♣K | +1 | -1 |
| -0.9 | Round 8 | GERMANY OPEN | 18 | 3NT | ♠3 | = | +0 |
| -1.1 | Round 1 | ZURZITZ | 4 | 2♥ | ♦5 | = | -1 |
| -1.3 | Round 1 | ZURZITZ | 2 | 5♣ | ♥8 | = | +1 |
| -1.3 | Round 5 | RASEDYRA | 14 | 3♦ | ♠3 | -1 | +2 |
| -1.5 | Round 2 | HOFFMAN | 16 | 3NT | ♥6 | +1 | +1 |
| -1.5 | Round 5 | RASEDYRA | 15 | 2♥ | ♠3 | +2 | +6 |
| -1.7 | Round 4 | LEVY STERN | 5 | 1NT | ♥Q | -1 | +0 |
| -1.7 | Round 10 | NORWAY JUNIORS BLUE | 9 | 4♥ | ♣6 | = | +1 |
| -1.9 | Round 5 | RASEDYRA | 19 | 2♠ | ♥7 | -2 | +1 |
| -2.0 | Round 2 | HOFFMAN | 18 | 6♦ | ♣6 | +1 | +11 |
| -2.0 | Round 4 | LEVY STERN | 3 | 5♣ | ♦5 | -1 | -5 |
| -2.0 | Round 5 | RASEDYRA | 11 | 5♥ | ♠2 | = | +0 |
| -2.2 | Round 5 | RASEDYRA | 17 | 4♠ | ♦5 | = | +1 |
| -2.3 | Round 9 | SIN DEUT | 30 | 4♥ | ♣K | -1 | -4 |
| -2.5 | Round 8 | GERMANY OPEN | 12 | 3♣ | ♦A | -2 | -2 |
| -2.7 | Round 8 | GERMANY OPEN | 15 | 2NT | ♦7 | -1 | -5 |
| -3.0 | Round 7 | STAR | 8 | 6♠ | ♥A | -1 | -13 |
| -3.2 | Round 4 | LEVY STERN | 1 | 2♥ | ♦6 | -1 | -4 |
| -3.5 | Round 7 | STAR | 4 | 1NT | ♠6 | -3 | -5 |
| -3.9 | Round 9 | SIN DEUT | 26 | 4♠ | ♦3 | -3 | -10 |
| -4.2 | Round 2 | HOFFMAN | 11 | 4♠ | ♥3 | -2 | -11 |
| -4.8 | Round 1 | ZURZITZ | 6 | 5♦ | ♠A | -1 | -10 |
| -5.5 | Round 8 | GERMANY OPEN | 13 | 3♣ | ♠K | +1 | -15 |
| -5.6 | Round 8 | GERMANY OPEN | 14 | 1NTx | ♥7 | -2 | -5 |
| -5.9 | Round 10 | NORWAY JUNIORS BLUE | 4 | 6♠ | ♣A | -1 | -13 |
| -6.8 | Round 5 | RASEDYRA | 20 | 3NTx | ♠J | = | -4 |
| -7.0 | Round 8 | GERMANY OPEN | 19 | 2♠x | ♣2 | -4 | -5 |
| -7.2 | Round 9 | SIN DEUT | 23 | 2♣ | ♥7 | +3 | -10 |
| -7.5 | Round 8 | GERMANY OPEN | 17 | 6♣ | ♥A | -1 | -10 |
| -7.7 | Round 10 | NORWAY JUNIORS BLUE | 10 | 3NT | ♠K | -3 | -10 |
| -8.7 | Round 9 | SIN DEUT | 22 | 3NT | ♠2 | = | +0 |
| -8.9 | Round 1 | ZURZITZ | 7 | 6♣ | ♥9 | -1 | -17 |
| -9.5 | Round 1 | ZURZITZ | 5 | 6♠ | ♦A | = | +0 |
| -12.3 | Round 10 | NORWAY JUNIORS BLUE | 2 | 4♠x | ♣3 | -3 | -13 |