IZWANTOWSKI Jan · POLAND U21 B
324rank
-49.4Butler · 98 bds
-0.50per board
±4.9swing
-0.42vs par /bd · #284/382
-0.49adjusted /bd
by round
vs par split: bidding -0.27 · play -0.24
Strength of schedule: opponents averaged +0.01/bd (an average draw) → opponent-adjusted -0.49/bd
Card play — on target: opening leads 85.2% #86 of 382 · declarer play 64.7% #322 of 382 · defence 84.0% #314 of 382
Bidding activity — not a pass: 43.2% #170 of 382 (124/287)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 66.7% (3) | 87.5% (24) |
| Declarer play | 50.0% (6) | 72.7% (11) |
| Defence | 75.0% (12) | 86.8% (38) |
Opening leads by suit led: ♠ 80.0% (5) · ♥ 71.4% (7) · ♦ 88.9% (9) · ♣ 100.0% (6)
vs par by strain: NT +0.04 (23) · a suit -0.68 (74)
vs par by level: part-score -1.28 (39) · game +1.54 (48) · slam -7.30 (10)
By role: declaring -0.40/bd (-3.36 vs par · 47) · defending -0.60/bd (+2.29 vs par · 51)
By vulnerability: vulnerable -0.70/bd (-1.31 vs par · 49) · not vulnerable -0.30/bd (+0.47 vs par · 49)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | W.Tokarski | N.Hammelev – D.Tylvad | Open | 14 | -25.8 | -1.84 | +0.50 |
| Round 3 | W.Tokarski | G.Zivkovic – J.Derivaz | Closed | 14 | +23.0 | +1.64 | +1.64 |
| Round 5 | W.Tokarski | J.Amiguet – S.Magnusson | Open | 14 | -26.9 | -1.92 | -2.50 |
| Round 6 | W.Tokarski | P.Szymonik – S.Czech | Closed | 14 | -11.8 | -0.84 | -0.29 |
| Round 9 | W.Tokarski | F.Lecante – V.Raiko Raikovsky | Open | 14 | +27.8 | +1.99 | -0.07 |
| Round 11 | W.Tokarski | F.Nystrom – J.Upmark | Closed | 14 | -30.6 | -2.19 | -2.07 |
| Round 12 | W.Tokarski | K.Polap – E.Lindenthal | Open | 14 | -5.1 | -0.36 | -0.14 |
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 |
|---|---|---|---|---|---|---|---|
| +10.7 | Round 1 | LAHRMANN | 9 | 7♣x | ♠K | -5 | +10 |
| +10.3 | Round 6 | GDANSK | 26 | 5♥ | ♦Q | -2 | +13 |
| +9.4 | Round 3 | SWISS SENIORS | 7 | 6NT | ♦J | = | -13 |
| +7.6 | Round 12 | ASCHAFFENBURG | 23 | Adj. | ♦T | +8 | |
| +7.4 | Round 11 | BORTOLETTI | 1 | 5♠x | ♣K | = | +13 |
| +7.1 | Round 3 | SWISS SENIORS | 12 | 4♠ | ♣3 | +2 | +16 |
| +6.7 | Round 9 | TAQUOI | 12 | 3NT | ♥J | = | -2 |
| +6.2 | Round 3 | SWISS SENIORS | 2 | 5♠ | ♣7 | -1 | +17 |
| +6.2 | Round 9 | TAQUOI | 2 | 4♠ | ♥A | = | -5 |
| +5.9 | Round 5 | ISTARI | 12 | 4♠x | ♥A | -2 | +9 |
| +5.7 | Round 12 | ASCHAFFENBURG | 28 | 4♥ | ♣Q | = | +8 |
| +5.1 | Round 9 | TAQUOI | 4 | 4♥ | ♠5 | -1 | +6 |
| +4.3 | Round 5 | ISTARI | 4 | 3NT | ♠K | -3 | +9 |
| +4.3 | Round 9 | TAQUOI | 13 | 6♣ | ♥3 | = | -13 |
| +4.0 | Round 9 | TAQUOI | 3 | 3♠ | ♥5 | -2 | +7 |
| +3.9 | Round 3 | SWISS SENIORS | 5 | 4♠ | ♦7 | +1 | +17 |
| +3.4 | Round 11 | BORTOLETTI | 14 | 2♠ | ♠8 | +1 | -7 |
| +3.1 | Round 3 | SWISS SENIORS | 6 | 1NT | ♦9 | +3 | +6 |
| +3.1 | Round 9 | TAQUOI | 9 | 7♥ | ♥T | = | +0 |
| +3.1 | Round 12 | ASCHAFFENBURG | 22 | 3♥ | ♦7 | = | +6 |
| +3.0 | Round 6 | GDANSK | 21 | 4♥ | ♠4 | -1 | +6 |
| +2.8 | Round 1 | LAHRMANN | 12 | 4♠ | ♥7 | -1 | +12 |
| +2.7 | Round 9 | TAQUOI | 7 | 1NT | ♥2 | = | -1 |
| +2.5 | Round 1 | LAHRMANN | 1 | 4♥ | ♠K | -2 | +5 |
| +2.5 | Round 1 | LAHRMANN | 5 | 3NT | ♥Q | -1 | +6 |
| +2.1 | Round 5 | ISTARI | 14 | 2NT | ♥Q | -1 | +10 |
| +1.8 | Round 3 | SWISS SENIORS | 13 | 4♠ | ♥A | = | +9 |
| +1.8 | Round 12 | ASCHAFFENBURG | 16 | 3NT | ♥6 | +2 | +0 |
| +1.7 | Round 6 | GDANSK | 20 | 2♥ | ♠9 | = | +0 |
| +1.6 | Round 1 | LAHRMANN | 7 | 5NT | ♣2 | +1 | +13 |
| +1.6 | Round 12 | ASCHAFFENBURG | 24 | 4♥ | ♦2 | = | +3 |
| +1.5 | Round 11 | BORTOLETTI | 13 | 2♣ | ♥2 | +1 | +6 |
| +1.2 | Round 9 | TAQUOI | 8 | 2♣ | ♦4 | -1 | +3 |
| +1.2 | Round 12 | ASCHAFFENBURG | 17 | 4♠ | ♦8 | +1 | +1 |
| +1.1 | Round 5 | ISTARI | 7 | 1NT | ♥Q | -2 | +2 |
| +0.7 | Round 3 | SWISS SENIORS | 3 | 2♥ | ♣J | = | +1 |
| +0.6 | Round 6 | GDANSK | 22 | 4♠ | ♦6 | +2 | -17 |
| +0.6 | Round 11 | BORTOLETTI | 3 | 2♠ | ♦T | +1 | -6 |
| +0.5 | Round 3 | SWISS SENIORS | 1 | 6NT | ♣J | = | +0 |
| +0.4 | Round 3 | SWISS SENIORS | 14 | 3♣ | ♥A | -1 | +3 |
| +0.4 | Round 9 | TAQUOI | 6 | 1NT | ♦3 | +2 | +1 |
| +0.3 | Round 6 | GDANSK | 24 | 4♦ | ♠Q | -1 | -4 |
| +0.3 | Round 11 | BORTOLETTI | 6 | 3♣x | ♦2 | -3 | -8 |
| +0.2 | Round 6 | GDANSK | 25 | 3♦ | ♠9 | +1 | -1 |
| +0.1 | Round 9 | TAQUOI | 1 | 4♠ | ♦7 | +1 | +0 |
| +0.1 | Round 12 | ASCHAFFENBURG | 19 | 2♥ | ♠T | -1 | +2 |
| +0.0 | Round 3 | SWISS SENIORS | 10 | 5♣ | ♥A | +1 | -13 |
| +0.0 | Round 6 | GDANSK | 16 | 4♠ | ♦K | -1 | -2 |
| -0.2 | Round 5 | ISTARI | 9 | 3NT | ♠2 | +1 | -1 |
| -0.2 | Round 6 | GDANSK | 28 | 2♠ | ♦9 | -1 | +2 |
| -0.3 | Round 9 | TAQUOI | 10 | 1NT | ♠2 | +2 | +10 |
| -0.4 | Round 1 | LAHRMANN | 14 | 4♠ | ♦2 | +1 | +0 |
| -0.4 | Round 5 | ISTARI | 8 | 3♣ | ♥A | -3 | -6 |
| -0.4 | Round 9 | TAQUOI | 14 | 4♠ | ♥J | +1 | +0 |
| -0.4 | Round 12 | ASCHAFFENBURG | 18 | 3NT | ♠J | -2 | -7 |
| -0.7 | Round 3 | SWISS SENIORS | 4 | 4♠ | ♥6 | +1 | +0 |
| -0.8 | Round 1 | LAHRMANN | 2 | 4♥ | ♣K | = | -3 |
| -0.8 | Round 5 | ISTARI | 2 | 2♣ | ♠9 | = | +1 |
| -0.9 | Round 1 | LAHRMANN | 13 | 4♠ | ♣2 | +2 | +13 |
| -0.9 | Round 5 | ISTARI | 1 | 2♠ | ♦T | +1 | +0 |
| -1.0 | Round 3 | SWISS SENIORS | 8 | 3♥ | ♣K | -1 | -5 |
| -1.0 | Round 12 | ASCHAFFENBURG | 25 | 1NT | ♥3 | = | -1 |
| -1.2 | Round 11 | BORTOLETTI | 2 | 2♠ | ♥J | = | -5 |
| -1.3 | Round 6 | GDANSK | 19 | 3♠ | ♦6 | -3 | +2 |
| -1.4 | Round 5 | ISTARI | 11 | 2♣ | ♦Q | = | -7 |
| -1.4 | Round 11 | BORTOLETTI | 7 | 3NT | ♥Q | +1 | +1 |
| -1.4 | Round 12 | ASCHAFFENBURG | 26 | 3♠ | ♠J | -1 | +0 |
| -1.8 | Round 3 | SWISS SENIORS | 9 | 2♠ | ♦K | = | -5 |
| -1.8 | Round 12 | ASCHAFFENBURG | 15 | 2♥ | ♦K | = | +0 |
| -2.1 | Round 6 | GDANSK | 17 | 4♥ | ♣Q | +2 | +14 |
| -2.2 | Round 1 | LAHRMANN | 4 | 4♠ | ♦6 | +2 | -1 |
| -2.2 | Round 9 | TAQUOI | 11 | 3NT | ♦9 | = | -6 |
| -2.3 | Round 11 | BORTOLETTI | 11 | 3♥ | ♣K | +1 | +6 |
| -2.7 | Round 12 | ASCHAFFENBURG | 21 | 3NT | ♥2 | +2 | -2 |
| -3.1 | Round 9 | TAQUOI | 5 | 4♠ | ♣K | +1 | -1 |
| -3.4 | Round 5 | ISTARI | 6 | 2NT | ♠9 | = | -6 |
| -3.5 | Round 11 | BORTOLETTI | 12 | 3♥ | ♣5 | = | -8 |
| -3.6 | Round 6 | GDANSK | 27 | 3NT | ♠7 | -1 | -5 |
| -3.6 | Round 11 | BORTOLETTI | 9 | 5♥ | ♣A | +1 | +1 |
| -4.0 | Round 5 | ISTARI | 3 | 4♠ | ♣J | -2 | -6 |
| -4.1 | Round 6 | GDANSK | 23 | 5♦ | ♣9 | +1 | +10 |
| -4.1 | Round 12 | ASCHAFFENBURG | 27 | 3♥ | ♦4 | -3 | -6 |
| -4.2 | Round 11 | BORTOLETTI | 8 | 3♦ | ♣T | +2 | -7 |
| -4.9 | Round 11 | BORTOLETTI | 5 | 3NT | ♥Q | = | +0 |
| -5.9 | Round 1 | LAHRMANN | 6 | 4♥ | ♣2 | -3 | -10 |
| -6.4 | Round 1 | LAHRMANN | 8 | 4♠x | ♥6 | = | -7 |
| -6.6 | Round 3 | SWISS SENIORS | 11 | 4♦ | ♥5 | +1 | -10 |
| -6.8 | Round 6 | GDANSK | 18 | 3♦ | ♣6 | = | -11 |
| -8.7 | Round 1 | LAHRMANN | 11 | 4♠ | ♥T | +2 | -5 |
| -8.9 | Round 1 | LAHRMANN | 10 | 6♣ | ♦K | -4 | -14 |
| -8.9 | Round 5 | ISTARI | 13 | 6♣ | ♥6 | -1 | -16 |
| -9.6 | Round 11 | BORTOLETTI | 4 | 3NT | ♠J | -2 | -13 |
| -9.8 | Round 6 | GDANSK | 15 | 6♥ | ♦K | -1 | -11 |
| -10.0 | Round 5 | ISTARI | 10 | 4♥ | ♦7 | = | -10 |
| -10.3 | Round 5 | ISTARI | 5 | 6♠ | ♥2 | -1 | -14 |
| -11.7 | Round 1 | LAHRMANN | 3 | 5♠x | ♦J | -3 | -12 |
| -13.1 | Round 11 | BORTOLETTI | 10 | 6♥ | ♥2 | = | -2 |
| -14.8 | Round 12 | ASCHAFFENBURG | 20 | 2♥x | ♥7 | +1 | -14 |