MAZURKIEWICZ Marcin · MAZURKIEWICZ
86rank
+50.6Butler · 100 bds
+0.51per board
±4.0swing
+0.05vs par /bd · #269/553
+0.73adjusted /bd
by round
vs par split: bidding -0.65 · play +0.70
Strength of schedule: opponents averaged +0.23/bd (a tough draw) → opponent-adjusted +0.73/bd
Card play — on target: opening leads 73.9% #408 of 551 · declarer play 85.3% #71 of 551 · defence 85.7% #236 of 553
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 62.5% (8) | 80.0% (15) |
| Declarer play | 75.0% (8) | 88.5% (26) |
| Defence | 88.9% (18) | 83.9% (31) |
Opening leads by suit led: ♠ 71.4% (7) · ♥ 100.0% (7) · ♦ 40.0% (5) · ♣ 75.0% (4)
vs par by strain: NT -0.60 (30) · a suit +0.33 (70)
vs par by level: part-score +0.10 (31) · game +0.21 (62) · slam -1.57 (7)
By role: declaring +0.95/bd (-1.73 vs par · 51) · defending +0.05/bd (+1.90 vs par · 49)
By vulnerability: vulnerable +0.17/bd (+0.29 vs par · 49) · not vulnerable +0.83/bd (-0.18 vs par · 51)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | K.Jassem | C.Stirbu – G.Serpoi | Open | 10 | +1.1 | +0.11 | -3.20 |
| Round 2 | K.Jassem | J.Upmark – F.Nystrom | Closed | 10 | +6.4 | +0.64 | +0.10 |
| Round 3 | K.Jassem | M.Lanzarotti – E.Castellani | Closed | 10 | -3.0 | -0.30 | -0.90 |
| Round 4 | K.Jassem | G.Vignaga – L.Fruscoloni | Closed | 10 | +9.5 | +0.95 | -0.90 |
| Round 5 | K.Jassem | L.Sztyrak – R.Szczepanski | Closed | 10 | +20.2 | +2.02 | +4.30 |
| Round 6 | K.Jassem | A.Bowles – S.Mohandes | Closed | 10 | +8.6 | +0.86 | +1.60 |
| Round 7 | K.Jassem | R.Pachtman – P.Zatorski | Closed | 10 | -9.2 | -0.92 | -1.40 |
| Round 8 | K.Jassem | B.Nab – B.Drijver | Closed | 10 | -7.7 | -0.77 | -0.20 |
| Round 9 | K.Jassem | G.Homonnay – G.Winkler | Closed | 10 | +28.0 | +2.80 | +2.90 |
| Round 10 | K.Jassem | Y.Roll – A.Levin | Closed | 10 | -3.3 | -0.33 | -1.80 |
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 |
|---|---|---|---|---|---|---|---|
| +11.9 | Round 5 | ZAWADA | 19 | 4♥x | ♠Q | = | +12 |
| +11.4 | Round 5 | ZAWADA | 18 | 4♥ | ♠A | -1 | +12 |
| +9.6 | Round 10 | SHOKOLATA | 1 | 7♥ | ♥9 | = | +0 |
| +9.4 | Round 9 | GAMAX | 22 | 5♣x | ♠9 | -3 | +12 |
| +8.9 | Round 9 | GAMAX | 26 | 4♥ | ♠K | = | +13 |
| +7.4 | Round 4 | LEONARDO | 8 | 4♠ | ♥2 | +3 | +14 |
| +6.9 | Round 8 | NETHERLANDS RED | 12 | 5♥ | ♠5 | -1 | +10 |
| +6.9 | Round 9 | GAMAX | 21 | 4♠ | ♠9 | -3 | +10 |
| +6.8 | Round 1 | 1ST OF JULY | 9 | 6♦ | ♣3 | = | +0 |
| +6.5 | Round 2 | VYTAS | 13 | 6♠ | ♥4 | = | +0 |
| +5.6 | Round 6 | MOSTYN | 29 | 5♥ | ♦A | -1 | +15 |
| +5.3 | Round 1 | 1ST OF JULY | 6 | 6♠ | ♠J | = | +0 |
| +4.9 | Round 4 | LEONARDO | 6 | 2♠ | ♣5 | -1 | +5 |
| +4.3 | Round 2 | VYTAS | 15 | 3♣ | ♣6 | = | +6 |
| +4.2 | Round 7 | ERA | 9 | 2♥x | ♣A | -1 | +2 |
| +4.1 | Round 4 | LEONARDO | 5 | 4♠ | ♣2 | -2 | +6 |
| +4.1 | Round 6 | MOSTYN | 21 | 2NT | ♠3 | +2 | +2 |
| +3.8 | Round 5 | ZAWADA | 13 | 4♠ | ♦9 | +3 | +2 |
| +3.8 | Round 6 | MOSTYN | 26 | 4♠ | ♥J | +1 | +13 |
| +3.5 | Round 9 | GAMAX | 30 | 4♥ | ♦K | = | +0 |
| +2.8 | Round 3 | BRENO | 30 | 4♠ | ♠Q | -2 | +5 |
| +2.8 | Round 8 | NETHERLANDS RED | 17 | 1NT | ♦Q | -1 | +4 |
| +2.6 | Round 3 | BRENO | 29 | 5♣x | ♠A | -2 | +0 |
| +2.4 | Round 3 | BRENO | 28 | 4♠ | ♦3 | = | +0 |
| +2.1 | Round 2 | VYTAS | 17 | 3♣ | ♣3 | = | +0 |
| +2.1 | Round 5 | ZAWADA | 16 | 3♥ | ♦5 | = | +0 |
| +2.0 | Round 1 | 1ST OF JULY | 1 | 6♠ | ♦A | = | +0 |
| +2.0 | Round 7 | ERA | 10 | 2♥ | ♠7 | +2 | +10 |
| +1.8 | Round 4 | LEONARDO | 7 | 5♦ | ♥4 | = | -2 |
| +1.7 | Round 3 | BRENO | 21 | 2♥ | ♠7 | +1 | +0 |
| +1.6 | Round 8 | NETHERLANDS RED | 19 | 2♦ | ♠2 | -2 | -6 |
| +1.6 | Round 9 | GAMAX | 28 | 2♥ | ♠K | = | +5 |
| +1.6 | Round 10 | SHOKOLATA | 7 | 2NT | ♥J | -1 | +0 |
| +1.5 | Round 8 | NETHERLANDS RED | 15 | 1NT | ♣7 | = | +5 |
| +1.4 | Round 5 | ZAWADA | 12 | 4♠ | ♥6 | +2 | +1 |
| +1.4 | Round 9 | GAMAX | 24 | 4♠ | ♥K | +2 | -11 |
| +1.4 | Round 10 | SHOKOLATA | 9 | 3♦ | ♣6 | -1 | -3 |
| +1.1 | Round 3 | BRENO | 24 | 4♠ | ♣J | +2 | +2 |
| +1.0 | Round 1 | 1ST OF JULY | 7 | 4♥ | ♣2 | +1 | +1 |
| +1.0 | Round 6 | MOSTYN | 25 | 5♣ | ♠A | = | +9 |
| +1.0 | Round 8 | NETHERLANDS RED | 16 | 4♥ | ♠Q | -1 | +12 |
| +0.9 | Round 2 | VYTAS | 12 | 3NT | ♠5 | +1 | +0 |
| +0.7 | Round 6 | MOSTYN | 27 | 3NT | ♣3 | = | +1 |
| +0.6 | Round 9 | GAMAX | 29 | 3NT | ♠8 | +1 | +0 |
| +0.4 | Round 7 | ERA | 3 | 1NT | ♣3 | = | +0 |
| +0.4 | Round 8 | NETHERLANDS RED | 20 | 3♥ | ♥3 | = | +0 |
| +0.3 | Round 7 | ERA | 4 | 4♠ | ♥J | = | +0 |
| +0.2 | Round 1 | 1ST OF JULY | 8 | 3NT | ♠3 | +3 | -11 |
| +0.2 | Round 4 | LEONARDO | 2 | 2♥ | ♣2 | -3 | -10 |
| +0.2 | Round 4 | LEONARDO | 10 | 4♠ | ♦8 | = | +0 |
| +0.1 | Round 9 | GAMAX | 27 | 4♥ | ♦4 | +1 | +0 |
| +0.1 | Round 10 | SHOKOLATA | 2 | 4♠ | ♠10 | -2 | +0 |
| +0.0 | Round 2 | VYTAS | 18 | 1NT | ♣5 | = | +0 |
| -0.1 | Round 2 | VYTAS | 11 | 4♠ | ♦9 | = | -1 |
| -0.1 | Round 5 | ZAWADA | 20 | 3♠ | ♣K | -2 | +10 |
| -0.2 | Round 2 | VYTAS | 14 | 1NT | ♥8 | +1 | +0 |
| -0.2 | Round 3 | BRENO | 26 | 1NT | ♦3 | +1 | -1 |
| -0.2 | Round 6 | MOSTYN | 28 | 3NT | ♣5 | +1 | +0 |
| -0.2 | Round 7 | ERA | 7 | 3♠ | ♦5 | +1 | -10 |
| -0.2 | Round 9 | GAMAX | 25 | 2♠ | ♥A | +1 | +0 |
| -0.4 | Round 4 | LEONARDO | 4 | 1NT | ♣2 | = | +0 |
| -0.4 | Round 7 | ERA | 1 | 2♥ | ♠2 | +3 | -6 |
| -0.5 | Round 6 | MOSTYN | 30 | 4♥ | ♦K | -1 | -10 |
| -0.7 | Round 1 | 1ST OF JULY | 2 | 5♠ | ♥4 | = | +0 |
| -0.8 | Round 10 | SHOKOLATA | 4 | 3NT | ♠4 | +3 | -1 |
| -0.9 | Round 3 | BRENO | 23 | 3♦ | ♣3 | = | +1 |
| -0.9 | Round 6 | MOSTYN | 23 | 4♥ | ♣10 | -1 | -12 |
| -0.9 | Round 6 | MOSTYN | 24 | 3NT | ♥2 | = | -2 |
| -0.9 | Round 7 | ERA | 6 | 3NT | ♦K | +1 | +0 |
| -1.0 | Round 2 | VYTAS | 19 | 3♦ | ♣K | = | +1 |
| -1.0 | Round 10 | SHOKOLATA | 6 | 4♥ | ♣9 | +1 | +0 |
| -1.2 | Round 1 | 1ST OF JULY | 4 | 4♥ | ♣K | +2 | -13 |
| -1.4 | Round 5 | ZAWADA | 14 | 3NT | ♥Q | +2 | +11 |
| -1.6 | Round 1 | 1ST OF JULY | 10 | 3NT | ♠2 | -2 | +2 |
| -1.8 | Round 2 | VYTAS | 16 | 4♠ | ♣A | +1 | +0 |
| -1.8 | Round 5 | ZAWADA | 15 | 1NT | ♦3 | = | +0 |
| -1.8 | Round 7 | ERA | 5 | 3NT | ♥J | +2 | -1 |
| -2.5 | Round 10 | SHOKOLATA | 5 | 3NT | ♥3 | +3 | -1 |
| -2.6 | Round 8 | NETHERLANDS RED | 11 | 6♥ | ♣A | +1 | -11 |
| -2.7 | Round 7 | ERA | 8 | 4♥ | ♥J | = | +0 |
| -2.7 | Round 8 | NETHERLANDS RED | 13 | 3NT | ♠K | +1 | +0 |
| -2.7 | Round 10 | SHOKOLATA | 10 | 4♠ | ♥5 | -2 | -7 |
| -2.8 | Round 4 | LEONARDO | 1 | 3♣ | ♣A | +1 | -1 |
| -2.9 | Round 4 | LEONARDO | 9 | 4♥ | ♠5 | -1 | -10 |
| -3.0 | Round 4 | LEONARDO | 3 | 4♠ | ♦K | +2 | -11 |
| -3.0 | Round 5 | ZAWADA | 17 | 3NT | ♦J | -1 | -5 |
| -3.1 | Round 3 | BRENO | 25 | 2♠ | ♦3 | +1 | -6 |
| -3.7 | Round 10 | SHOKOLATA | 3 | 3NT | ♦10 | = | +0 |
| -4.1 | Round 5 | ZAWADA | 11 | 3NT | ♣6 | = | +0 |
| -4.1 | Round 6 | MOSTYN | 22 | 4♠ | ♥A | = | +0 |
| -4.2 | Round 3 | BRENO | 22 | 3NT | ♣7 | -1 | -12 |
| -4.2 | Round 9 | GAMAX | 23 | 6♦ | ♥8 | = | +0 |
| -4.3 | Round 2 | VYTAS | 20 | 2♠ | ♦8 | = | -5 |
| -4.4 | Round 1 | 1ST OF JULY | 3 | 3NT | ♠10 | +1 | -8 |
| -5.2 | Round 3 | BRENO | 27 | 3NT | ♥J | = | +2 |
| -5.3 | Round 10 | SHOKOLATA | 8 | 5♦x | ♥A | = | -6 |
| -5.6 | Round 8 | NETHERLANDS RED | 14 | 3NT | ♣J | = | -3 |
| -6.3 | Round 1 | 1ST OF JULY | 5 | 4♠ | ♣2 | +2 | -3 |
| -10.1 | Round 7 | ERA | 2 | 4♠x | ♥K | -3 | -9 |
| -11.0 | Round 8 | NETHERLANDS RED | 18 | 4♥ | ♣5 | +1 | -13 |