ZHANG Brian · USS UNSINKABLE
6rank
+45.0Butler · 84 bds
+0.54per board
±5.7swing
+1.50vs par /bd · #2/18
+0.73adjusted /bd
by round
vs par split: bidding +1.31 · play +0.19
Strength of schedule: opponents averaged +0.19/bd (a tough draw) → opponent-adjusted +0.73/bd
Card play — on target: opening leads 78.6% #9 of 18 · declarer play 73.1% #12 of 18 · defence 90.6% #2 of 18
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 71.4% (7) | 85.7% (7) |
| Declarer play | 80.0% (5) | 71.4% (21) |
| Defence | 100.0% (14) | 83.3% (18) |
Opening leads by suit led: ♠ 75.0% (4) · ♥ 100.0% (1) · ♦ 80.0% (5) · ♣ 75.0% (4)
vs par by strain: NT +2.45 (31) · a suit +0.94 (53)
vs par by level: part-score -0.35 (20) · game +1.62 (58) · slam +6.50 (6)
By role: declaring +0.48/bd (-0.61 vs par · 52) · defending +0.63/bd (+4.94 vs par · 32)
By vulnerability: vulnerable +0.33/bd (+1.89 vs par · 44) · not vulnerable +0.76/bd (+1.07 vs par · 40)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Semifinal | A.Chen | J.Michalski – F.Stezala | Open | 12 | +4.8 | +0.40 | +1.92 |
| Semifinal | A.Chen | I.Kotewicz – A.Wojtowicz | Open | 12 | -10.3 | -0.86 | +0.42 |
| Semifinal | A.Chen | J.Michalski – F.Stezala | Open | 12 | +36.0 | +3.00 | +6.00 |
| Final | A.Chen | A.Pedmanson – J.Vahk | Open | 12 | +9.4 | +0.78 | +0.33 |
| Final | A.Chen | J.Vahk – A.Pedmanson | Closed | 12 | +20.8 | +1.73 | +1.75 |
| Final | A.Chen | D.Li – BHATT ANSHUL | Open | 12 | +5.3 | +0.44 | -0.67 |
| Final | E.Xiao | J.Vahk – A.Pedmanson | Closed | 12 | -21.0 | -1.75 | +0.75 |
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 |
|---|---|---|---|---|---|---|---|
| +13.0 | Semifinal | CKIS SKAWINA U12 | 40 | 3NT | ♣7 | +2 | +11 |
| +13.0 | Semifinal | CKIS SKAWINA U12 | 48 | 3NT | ♥2 | -2 | +13 |
| +11.0 | Final | BLITZ | 12 | 3NT | ♠5 | -2 | +11 |
| +10.3 | Final | BLITZ | 28 | 6NT | ♦7 | -5 | +15 |
| +10.0 | Final | BLITZ | 33 | 4♠ | ♥4 | = | +7 |
| +8.7 | Final | BLITZ | 30 | 3NT | ♣J | = | -2 |
| +8.0 | Semifinal | CKIS SKAWINA U12 | 3 | 4♠ | ♥A | = | +7 |
| +7.3 | Semifinal | CKIS SKAWINA U12 | 5 | 6♦x | ♠A | -1 | +11 |
| +7.3 | Final | BLITZ | 9 | 6♣x | ♦A | -1 | +11 |
| +7.0 | Semifinal | CKIS SKAWINA U12 | 44 | 4♠ | ♣A | = | +0 |
| +6.7 | Final | BLITZ | 22 | 4♥ | ♦4 | = | +8 |
| +6.0 | Semifinal | CKIS SKAWINA U12 | 38 | 3♥ | ♠5 | +1 | +12 |
| +6.0 | Final | BLITZ | 37 | 3NT | ♠Q | = | +0 |
| +5.7 | Final | BLITZ | 15 | 3NT | ♥5 | -4 | +8 |
| +5.3 | Semifinal | CKIS SKAWINA U12 | 10 | 1♥ | ♥2 | +5 | +9 |
| +5.3 | Final | BLITZ | 14 | 3NT | ♠2 | +2 | +0 |
| +5.3 | Final | BLITZ | 19 | 4♥ | ♠K | -2 | +13 |
| +5.0 | Semifinal | CKIS SKAWINA U12 | 2 | 4♠ | ♥A | +1 | +8 |
| +4.7 | Semifinal | CKIS SKAWINA U12 | 7 | 1NT | ♥A | +2 | +6 |
| +4.7 | Final | BLITZ | 24 | 3NT | ♥7 | +2 | +2 |
| +4.3 | Semifinal | CKIS SKAWINA U12 | 4 | 6♠ | ♣8 | +1 | +13 |
| +4.0 | Final | BLITZ | 17 | 4♠ | ♣K | +1 | +4 |
| +4.0 | Final | BLITZ | 40 | 4♥ | ♦5 | -1 | +6 |
| +3.3 | Final | BLITZ | 7 | 3NT | ♠5 | +1 | +0 |
| +3.3 | Final | BLITZ | 27 | 3NT | ♥5 | +1 | -1 |
| +3.3 | Final | BLITZ | 34 | 4♠ | ♦A | = | +10 |
| +3.0 | Semifinal | CKIS SKAWINA U12 | 8 | 4♥ | ♣10 | +2 | +2 |
| +3.0 | Semifinal | CKIS SKAWINA U12 | 42 | 3NT | ♦Q | -2 | +13 |
| +2.7 | Final | BLITZ | 11 | 4♥ | ♣10 | = | -9 |
| +2.7 | Final | BLITZ | 20 | 1NT | ♣3 | -3 | +2 |
| +2.7 | Final | BLITZ | 21 | 2NT | ♦7 | -3 | -5 |
| +2.3 | Semifinal | CKIS SKAWINA U12 | 22 | 4♥ | ♠7 | +1 | +0 |
| +2.0 | Semifinal | CKIS SKAWINA U12 | 14 | 3NT | ♦5 | = | -1 |
| +1.7 | Semifinal | CKIS SKAWINA U12 | 18 | 5♦ | ♠K | -1 | -6 |
| +1.7 | Semifinal | CKIS SKAWINA U12 | 19 | 3♦ | ♦8 | -1 | -2 |
| +1.7 | Final | BLITZ | 8 | 2♥ | ♠7 | = | +0 |
| +1.7 | Final | BLITZ | 16 | 2♥ | ♣Q | +3 | +10 |
| +1.7 | Final | BLITZ | 32 | 3♥ | ♦K | = | +1 |
| +1.0 | Semifinal | CKIS SKAWINA U12 | 46 | 3NT | ♥2 | = | +2 |
| +1.0 | Final | BLITZ | 44 | 4♠ | ♦8 | +1 | +8 |
| +0.3 | Final | BLITZ | 31 | 3NT | ♦10 | +1 | +0 |
| +0.0 | Semifinal | CKIS SKAWINA U12 | 16 | 3NT | ♣10 | = | +1 |
| +0.0 | Semifinal | CKIS SKAWINA U12 | 17 | 4♠ | ♦K | = | +0 |
| +0.0 | Semifinal | CKIS SKAWINA U12 | 41 | 5♥ | ♦Q | +1 | +9 |
| +0.0 | Semifinal | CKIS SKAWINA U12 | 43 | 4♥ | ♠A | +1 | +8 |
| +0.0 | Semifinal | CKIS SKAWINA U12 | 45 | 4♠ | ♣Q | = | +0 |
| +0.0 | Semifinal | CKIS SKAWINA U12 | 47 | 3NT | ♠5 | -1 | +15 |
| +0.0 | Final | BLITZ | 4 | 4♥ | ♠Q | = | +0 |
| +0.0 | Final | BLITZ | 6 | 1NT | ♥9 | -2 | +1 |
| -0.0 | Final | BLITZ | 39 | 2♣ | ♥9 | -3 | +0 |
| -0.0 | Final | BLITZ | 43 | 3♠ | ♥8 | +1 | -6 |
| -0.0 | Final | BLITZ | 46 | 5♦ | ♠A | -1 | +8 |
| -0.3 | Semifinal | CKIS SKAWINA U12 | 21 | 4♠ | ♦A | -1 | +11 |
| -0.3 | Semifinal | CKIS SKAWINA U12 | 23 | 4♠ | ♦10 | +2 | +2 |
| -0.7 | Semifinal | CKIS SKAWINA U12 | 11 | 5♣ | ♦A | -1 | +2 |
| -0.7 | Final | BLITZ | 13 | 5♦ | ♥K | -2 | -5 |
| -1.0 | Semifinal | CKIS SKAWINA U12 | 13 | 3NT | ♦5 | +1 | +0 |
| -1.0 | Final | BLITZ | 2 | 3NT | ♥2 | = | -1 |
| -1.0 | Final | BLITZ | 45 | 3♣ | ♠K | +2 | +10 |
| -1.0 | Final | BLITZ | 47 | 3NT | ♠9 | +4 | +14 |
| -1.7 | Semifinal | CKIS SKAWINA U12 | 15 | 3NT | ♦Q | +1 | +10 |
| -1.7 | Final | BLITZ | 35 | 3♥ | ♠Q | +1 | -6 |
| -2.0 | Semifinal | CKIS SKAWINA U12 | 39 | 4♥ | ♠J | -2 | -6 |
| -2.0 | Final | BLITZ | 26 | 3NT | ♥Q | +2 | +0 |
| -2.7 | Semifinal | CKIS SKAWINA U12 | 1 | 5♦ | ♠3 | -1 | -5 |
| -2.7 | Final | BLITZ | 3 | 3♣ | ♠Q | -1 | +2 |
| -3.0 | Final | BLITZ | 36 | 3NT | ♥10 | -1 | -6 |
| -3.0 | Final | BLITZ | 48 | 4♥ | ♦5 | -2 | -8 |
| -3.3 | Final | BLITZ | 5 | 6♦ | ♣9 | = | +2 |
| -4.3 | Final | BLITZ | 10 | 4♥ | ♠6 | -2 | -8 |
| -5.0 | Semifinal | CKIS SKAWINA U12 | 37 | 2♠ | ♦6 | -1 | -5 |
| -5.3 | Final | BLITZ | 1 | 4♠ | ♦5 | -1 | -5 |
| -5.7 | Semifinal | CKIS SKAWINA U12 | 12 | 4♥ | ♦9 | -1 | -6 |
| -7.0 | Semifinal | CKIS SKAWINA U12 | 20 | 3NT | ♣7 | = | -10 |
| -7.0 | Final | BLITZ | 38 | 3♥ | ♠K | = | -12 |
| -7.3 | Final | BLITZ | 18 | 3NT | ♦A | -2 | -8 |
| -7.7 | Semifinal | CKIS SKAWINA U12 | 24 | 4♠ | ♥K | = | +0 |
| -8.0 | Final | BLITZ | 42 | 1NT | ♠6 | +1 | -1 |
| -10.0 | Final | BLITZ | 23 | 4♥x | ♣3 | -2 | -8 |
| -10.3 | Final | BLITZ | 29 | 3NT | ♠7 | -3 | -13 |
| -11.0 | Semifinal | CKIS SKAWINA U12 | 9 | 5♥ | ♣A | -2 | -11 |
| -12.0 | Final | BLITZ | 41 | 2♠x | ♦3 | +1 | -10 |
| -12.7 | Semifinal | CKIS SKAWINA U12 | 6 | 3♦x | ♣K | = | -13 |
| -15.3 | Final | BLITZ | 25 | 6♥x | ♠6 | -2 | -13 |