BERCUSON Ken · MITTELMAN
242rank
+1.1Butler · 100 bds
+0.01per board
±4.2swing
+0.01vs par /bd · #234/478
-0.02adjusted /bd
by round
vs par split: bidding -0.15 · play +0.13
Strength of schedule: opponents averaged -0.03/bd (an average draw) → opponent-adjusted -0.02/bd
Card play — on target: opening leads 80.8% #144 of 476 · declarer play 77.8% #241 of 478 · defence 85.4% #257 of 478
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 83.3% (6) | 80.0% (20) |
| Declarer play | 83.3% (12) | 73.3% (15) |
| Defence | 73.3% (15) | 90.9% (33) |
Opening leads by suit led: ♠ 75.0% (4) · ♥ 87.5% (8) · ♦ 100.0% (6) · ♣ 62.5% (8)
vs par by strain: NT -0.09 (34) · a suit +0.01 (65)
vs par by level: part-score -0.71 (41) · game +0.62 (53) · slam -1.20 (5)
By role: declaring +0.26/bd (-1.57 vs par · 51) · defending -0.24/bd (+1.65 vs par · 49)
By vulnerability: vulnerable -0.85/bd (-0.94 vs par · 50) · not vulnerable +0.87/bd (+0.96 vs par · 50)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | G.Mittelman | T.Mchenry – G.Geiger | Closed | 10 | +10.2 | +1.02 | +3.20 |
| Round 2 | G.Mittelman | D.Wrang – A.Stokka | Closed | 10 | +5.9 | +0.59 | +0.20 |
| Round 3 | G.Mittelman | Y.Zhao – X.Li | Closed | 10 | -14.1 | -1.41 | -1.80 |
| Round 4 | G.Mittelman | B.Efraimsson – A.Zack Efraimsson | Open | 10 | +5.8 | +0.58 | -0.20 |
| Round 5 | G.Mittelman | D.Grainger – G.Hinze | Open | 10 | -9.4 | -0.94 | -2.30 |
| Round 6 | G.Mittelman | P.Fredin – L.Amoils | Closed | 10 | +19.9 | +1.99 | +4.20 |
| Round 7 | G.Mittelman | P.Janiszewski – S.Golebiowski | Closed | 10 | -6.1 | -0.61 | +1.60 |
| Round 8 | G.Mittelman | G.Chagas – M.Villas-Boas | Closed | 10 | -5.0 | -0.50 | -2.90 |
| Round 9 | G.Mittelman | V.Kiljan – L.Tijssen | Open | 10 | -0.9 | -0.09 | +0.50 |
| Round 10 | G.Mittelman | I.Bareket – A.Lengy | Open | 10 | -5.2 | -0.52 | -2.40 |
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 |
|---|---|---|---|---|---|---|---|
| +8.8 | Round 1 | JOHN VEGA | 1 | 3NT | ♦7 | +3 | +8 |
| +7.1 | Round 1 | JOHN VEGA | 3 | 4♥ | ♣J | +2 | +14 |
| +7.0 | Round 7 | ZAWADA | 19 | 4♥ | ♠2 | -1 | +10 |
| +6.9 | Round 6 | PAVLICEK | 2 | 3♠ | ♦3 | -1 | +10 |
| +6.9 | Round 6 | PAVLICEK | 7 | 3NT | ♦6 | -2 | +8 |
| +6.9 | Round 10 | EMERALD | 27 | 4♥ | ♥2 | = | +0 |
| +6.6 | Round 2 | SOUTH SWEDEN | 16 | 3♣x | ♠A | -1 | +13 |
| +6.1 | Round 1 | JOHN VEGA | 8 | 5♣ | ♦K | -1 | +10 |
| +5.9 | Round 7 | ZAWADA | 14 | 4♠ | ♥2 | +2 | +11 |
| +5.7 | Round 5 | LEVINE | 21 | 6♣ | ♥3 | = | -2 |
| +4.9 | Round 2 | SOUTH SWEDEN | 11 | 1NTx | ♥A | +1 | +4 |
| +4.9 | Round 4 | ANNA | 18 | 2♠ | ♦Q | -3 | +5 |
| +4.9 | Round 6 | PAVLICEK | 4 | 5♦ | ♦3 | -1 | +12 |
| +3.8 | Round 3 | CHINA OPEN 2 | 2 | 4♠ | ♣K | -1 | +9 |
| +3.8 | Round 8 | CHAGAS | 1 | 3NT | ♠3 | = | +7 |
| +3.7 | Round 2 | SOUTH SWEDEN | 15 | 5♥ | ♠A | = | +6 |
| +3.6 | Round 1 | JOHN VEGA | 6 | 3NT | ♣8 | +1 | +0 |
| +3.6 | Round 7 | ZAWADA | 11 | 3NT | ♠J | -2 | +6 |
| +3.4 | Round 5 | LEVINE | 22 | 2♠ | ♥3 | -1 | +5 |
| +3.3 | Round 4 | ANNA | 14 | 4♠ | ♥8 | = | +1 |
| +3.3 | Round 4 | ANNA | 15 | 5♦ | ♠3 | +1 | +1 |
| +3.3 | Round 4 | ANNA | 17 | 4♥ | ♣7 | +1 | +1 |
| +3.3 | Round 6 | PAVLICEK | 10 | 3NT | ♦3 | -2 | +8 |
| +3.2 | Round 8 | CHAGAS | 10 | 1NT | ♠9 | = | +5 |
| +3.0 | Round 9 | NETHERLANDS JUNIORS | 17 | 5♠ | ♣K | = | +0 |
| +2.9 | Round 6 | PAVLICEK | 3 | 4♠ | ♥3 | -1 | +5 |
| +2.8 | Round 6 | PAVLICEK | 8 | 2♣ | ♣3 | = | +5 |
| +2.7 | Round 3 | CHINA OPEN 2 | 4 | 3♦ | ♥A | -2 | +3 |
| +2.6 | Round 4 | ANNA | 12 | 3♣ | ♥J | = | +5 |
| +2.5 | Round 3 | CHINA OPEN 2 | 10 | 4♠ | ♥J | -1 | -6 |
| +2.4 | Round 3 | CHINA OPEN 2 | 6 | 2♠ | ♣10 | = | +0 |
| +2.3 | Round 4 | ANNA | 13 | 2♠ | ♥A | = | -1 |
| +1.8 | Round 2 | SOUTH SWEDEN | 17 | 3NT | ♠8 | +1 | +0 |
| +1.8 | Round 9 | NETHERLANDS JUNIORS | 13 | 3NT | ♣9 | +2 | +0 |
| +1.8 | Round 10 | EMERALD | 21 | 3NT | ♣2 | +1 | +1 |
| +1.7 | Round 2 | SOUTH SWEDEN | 20 | 2♠ | ♥A | = | +0 |
| +1.6 | Round 5 | LEVINE | 27 | 3♣ | ♣10 | -1 | -3 |
| +1.6 | Round 9 | NETHERLANDS JUNIORS | 15 | 4♠ | ♥K | +1 | +0 |
| +1.5 | Round 7 | ZAWADA | 18 | 3NT | ♥5 | +2 | +0 |
| +1.4 | Round 5 | LEVINE | 25 | 3NT | ♠J | = | +1 |
| +1.4 | Round 10 | EMERALD | 30 | 2♥ | ♠A | = | +0 |
| +1.2 | Round 8 | CHAGAS | 2 | 1NT | ♥7 | +2 | -6 |
| +1.2 | Round 10 | EMERALD | 24 | 6NT | ♠10 | = | +0 |
| +1.0 | Round 3 | CHINA OPEN 2 | 9 | 3NT | ♠5 | +1 | +0 |
| +0.9 | Round 9 | NETHERLANDS JUNIORS | 20 | 3NT | ♥J | +1 | +13 |
| +0.8 | Round 5 | LEVINE | 28 | Pass | +3 | ||
| +0.7 | Round 2 | SOUTH SWEDEN | 13 | 4♥ | ♦J | +1 | +0 |
| +0.7 | Round 8 | CHAGAS | 9 | 2♠ | ♣8 | +1 | +0 |
| +0.6 | Round 10 | EMERALD | 29 | 5♦ | ♥A | = | +1 |
| +0.5 | Round 9 | NETHERLANDS JUNIORS | 16 | 4♥ | ♠A | +2 | -3 |
| +0.4 | Round 9 | NETHERLANDS JUNIORS | 19 | 1NT | ♠K | +1 | +0 |
| -0.0 | Round 1 | JOHN VEGA | 5 | 2♦ | ♦4 | -1 | +5 |
| -0.0 | Round 5 | LEVINE | 26 | 3♣ | ♦K | = | +1 |
| +0.0 | Round 5 | LEVINE | 30 | 4♠ | ♦3 | = | +0 |
| -0.1 | Round 2 | SOUTH SWEDEN | 18 | 3NT | ♠J | +1 | +0 |
| -0.4 | Round 1 | JOHN VEGA | 10 | 4♥ | ♠4 | +1 | +0 |
| -0.5 | Round 8 | CHAGAS | 6 | 3NT | ♠4 | = | +0 |
| -0.7 | Round 6 | PAVLICEK | 1 | 3NT | ♦J | -1 | -4 |
| -0.8 | Round 10 | EMERALD | 25 | 3NT | ♣3 | +2 | +0 |
| -0.9 | Round 3 | CHINA OPEN 2 | 1 | 1NT | ♣A | = | +1 |
| -0.9 | Round 8 | CHAGAS | 7 | 2♦ | ♣2 | +2 | -10 |
| -1.2 | Round 7 | ZAWADA | 12 | 2♣ | ♥J | +3 | -1 |
| -1.3 | Round 7 | ZAWADA | 15 | 4♥ | ♣K | = | +0 |
| -1.4 | Round 9 | NETHERLANDS JUNIORS | 12 | 6NT | ♠8 | = | +0 |
| -1.5 | Round 4 | ANNA | 19 | 3♥ | ♥4 | +2 | -2 |
| -1.6 | Round 4 | ANNA | 20 | 2♠ | ♠3 | = | -5 |
| -1.6 | Round 8 | CHAGAS | 3 | 3NT | ♦10 | -1 | -12 |
| -1.6 | Round 10 | EMERALD | 28 | 2♠ | ♥A | = | +0 |
| -1.7 | Round 5 | LEVINE | 29 | 3NT | ♦4 | +3 | -1 |
| -1.8 | Round 7 | ZAWADA | 17 | 2♥ | ♣J | = | +0 |
| -1.9 | Round 1 | JOHN VEGA | 2 | 3♥ | ♦9 | = | +0 |
| -1.9 | Round 2 | SOUTH SWEDEN | 12 | 2♠ | ♠6 | +2 | -1 |
| -1.9 | Round 9 | NETHERLANDS JUNIORS | 11 | 3NT | ♠9 | = | +1 |
| -2.0 | Round 6 | PAVLICEK | 9 | 2♣ | ♠Q | -1 | +0 |
| -2.2 | Round 9 | NETHERLANDS JUNIORS | 18 | 2♠ | ♥4 | +1 | +0 |
| -2.3 | Round 2 | SOUTH SWEDEN | 14 | 3NTx | ♥6 | -1 | -5 |
| -2.4 | Round 1 | JOHN VEGA | 9 | 5♦ | ♣4 | = | +0 |
| -2.4 | Round 6 | PAVLICEK | 5 | 3♥ | ♠3 | = | -1 |
| -2.4 | Round 7 | ZAWADA | 16 | 6♠ | ♠10 | +1 | +11 |
| -2.7 | Round 6 | PAVLICEK | 6 | 2♠ | ♣A | +1 | -1 |
| -2.7 | Round 8 | CHAGAS | 5 | 3NT | ♥A | +2 | +0 |
| -2.8 | Round 3 | CHINA OPEN 2 | 5 | 2NT | ♠2 | -3 | -2 |
| -3.1 | Round 8 | CHAGAS | 4 | 4♥ | ♠9 | -1 | -6 |
| -3.1 | Round 10 | EMERALD | 22 | 2♥ | ♠Q | +3 | -10 |
| -3.4 | Round 3 | CHINA OPEN 2 | 8 | 2♠ | ♣A | +1 | -1 |
| -3.6 | Round 9 | NETHERLANDS JUNIORS | 14 | 3NT | ♦9 | -2 | -6 |
| -4.9 | Round 1 | JOHN VEGA | 4 | 5♦x | ♥6 | +1 | +4 |
| -5.1 | Round 7 | ZAWADA | 20 | 2♠ | ♥K | -1 | -6 |
| -5.1 | Round 8 | CHAGAS | 8 | 4♠ | ♠2 | = | -7 |
| -5.1 | Round 10 | EMERALD | 23 | 3♦ | ♣A | = | -6 |
| -5.4 | Round 4 | ANNA | 11 | 5♦x | ♣A | -3 | -2 |
| -5.4 | Round 4 | ANNA | 16 | 2♠ | ♣10 | -3 | -5 |
| -5.8 | Round 1 | JOHN VEGA | 7 | 2NT | ♦7 | +2 | -9 |
| -6.5 | Round 10 | EMERALD | 26 | 1NT | ♥10 | +2 | -10 |
| -8.2 | Round 5 | LEVINE | 24 | 4♥ | ♠9 | +2 | -11 |
| -8.9 | Round 3 | CHINA OPEN 2 | 3 | 3NT | ♥2 | = | -11 |
| -9.2 | Round 2 | SOUTH SWEDEN | 19 | 5♦x | ♥A | -2 | -15 |
| -10.5 | Round 3 | CHINA OPEN 2 | 7 | 3♣ | ♦2 | +1 | -11 |
| -12.3 | Round 7 | ZAWADA | 13 | 7♠ | ♦7 | = | -15 |
| -12.4 | Round 5 | LEVINE | 23 | 4♠x | ♣5 | -3 | -16 |