Open Pairs Sunday Aft Session April 15, 2018
Scores after  6 rounds  Average:   60.0      Section  A  North-South
Pair    Pct   Score      Section Rank      MPs
                         A     B     C
  1   59.75   71.70  A   1                0.60(A)  Roger Maurer Jr - Shelly Salvi
  2   58.75   70.50  A   2                0.42(A)  Frank Cusumano - Dolores Gracie
  6   55.17   66.20  A                             Fella Oppenheim - Evelyn Liehr
  3   48.67   58.40  A                             Rose Harris - Joan Gowder
  5   39.13   46.96  C         1          0.16(B)  Helene Weiss - Shirley Shrut
  4   38.08   45.70  C                             David Keltner - Bill Nussbaum

Open Pairs Sunday Aft Session April 15, 2018
Scores after  6 rounds  Average:   60.0      Section  A  East-West
Pair    Pct   Score      Section Rank      MPs
                         A     B     C
  1   65.25   78.30  A   1                0.60(A)  Edith Denenberg - Michael Greenhutt
  6   55.67   66.80  B   2     1          0.42(A)  Mark Zivian - Rosalie Lipson
  3   53.04   63.65  B         2          0.22(B)  Judith Barash - Farell Shaftel
  4   43.83   52.60  C                             Marilyn Aarons-Guttman - M David Guttman
  2   41.67   50.00  A                             Manny Mighdoll - Carole Behrman
  5   40.67   48.80  C                             Fay Cohen - Mel Ellen

Board 1
North Deals
None Vul
A Q J 2
9 7 3
Q 6 4
5 4 3
K 9 6 5 4
Q 10 8 4 2
K 2
7
N
WE
S
10 3
A J 10 5 3
A K Q 9 6 2
8 7
A K J 6 5
9 8 7
J 10 8

EW 5; W 5; W 3; E 4; EW 2N; E 2; W 1; Par −400

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
5 E−1504.500.505-Weiss-Shrut3-Barash-Shaftel
5 E−1504.500.506-Oppenheim-Liehr5-Cohen-Ellen
3 E41303.002.002-Cusumano-Gracie2-Mighdoll-Behrman
4 E51501.004.001-Maurer Jr-Salvi1-Denenberg-Greenhutt
3 E51501.004.003-Harris-Gowder4-Aarons-Guttman-Guttman
3 E51501.004.004-Keltner-Nussbaum6-Zivian-Lipson

Board 2
East Deals
N-S Vul
8 4
Q 9 3
K 9 7 6 5 4 2
10
A Q 6 3
A 8 7 6 2
3
A J 8
N
WE
S
J 9 5
K J 5
Q J 8
K Q 9 2
K 10 7 2
10 4
A 10
7 6 5 4 3

EW 5N; EW 5; EW 4; E 5; W 4; NS 1; Par −460

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 W−1505.000.006-Oppenheim-Liehr5-Cohen-Ellen
4 W44204.001.002-Cusumano-Gracie2-Mighdoll-Behrman
4 W54502.502.501-Maurer Jr-Salvi1-Denenberg-Greenhutt
4 W54502.502.503-Harris-Gowder4-Aarons-Guttman-Guttman
3 NTE54601.004.004-Keltner-Nussbaum6-Zivian-Lipson
4 W64800.005.005-Weiss-Shrut3-Barash-Shaftel

Board 3
South Deals
E-W Vul
A 10 2
Q 2
K 7 5
J 7 6 4 3
J 4
K 8 7 6
Q J 10 8 3
9 5
N
WE
S
K Q 9
J 9 5 4 3
A 2
A 10 2
8 7 6 5 3
A 10
9 6 4
K Q 8

EW 4; EW 3; EW 1N; NS 1; N 1; Par −500: NS 4×−3

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
3 E31405.000.001-Maurer Jr-Salvi1-Denenberg-Greenhutt
1 NTW31504.001.002-Cusumano-Gracie2-Mighdoll-Behrman
2 E41702.502.503-Harris-Gowder4-Aarons-Guttman-Guttman
3 E41702.502.506-Oppenheim-Liehr5-Cohen-Ellen
3 E52001.004.005-Weiss-Shrut3-Barash-Shaftel
4 E46200.005.004-Keltner-Nussbaum6-Zivian-Lipson

Board 4
West Deals
Both Vul
K 10 9 3 2
9 8
J 10 7 6 4
6
8 5 4
6 2
9 3
A 10 9 8 7 3
N
WE
S
A Q J
J 7 4 3
A 2
Q 5 4 2
7 6
A K Q 10 5
K Q 8 5
K J

NS 3; NS 2; NS 3; EW 3; Par +140

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
3 NTE−33004.900.103-Harris-Gowder4-Aarons-Guttman-Guttman
3 S31103.701.301-Maurer Jr-Salvi1-Denenberg-Greenhutt
2 S2902.502.502-Cusumano-Gracie2-Mighdoll-Behrman
3 ×S−12000.704.304-Keltner-Nussbaum6-Zivian-Lipson
3 ×N−12000.704.306-Oppenheim-Liehr5-Cohen-Ellen

Board 5
North Deals
N-S Vul
J 5
Q 6 2
A Q 10 8 2
A 6 5
A K Q 8 7 2
8 7 4
J 7
J 10
N
WE
S
10 6 4
K 5
9 6 5 3
Q 9 3 2
9 3
A J 10 9 3
K 4
K 8 7 4

NS 5; NS 5; NS 3; NS 1N; EW 1; Par +650

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 S46204.500.502-Cusumano-Gracie1-Denenberg-Greenhutt
4 S46204.500.505-Weiss-Shrut2-Mighdoll-Behrman
4 ×W−35002.502.501-Maurer Jr-Salvi6-Zivian-Lipson
4 ×W−35002.502.503-Harris-Gowder3-Barash-Shaftel
3 S52001.004.006-Oppenheim-Liehr4-Aarons-Guttman-Guttman
3 N51500.005.004-Keltner-Nussbaum5-Cohen-Ellen

Board 6
East Deals
E-W Vul
Q 8 7 5
9 8
9
J 10 9 5 3 2
A J 10 9 3
A J 4
K 4 3
K 7
N
WE
S
4 2
K 10 5 2
J 10 7 6 2
Q 8
K 6
Q 7 6 3
A Q 8 5
A 6 4

EW 2; EW 2; NS 2; Par −100: NS 3×−1

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
3 NTS34005.000.006-Oppenheim-Liehr4-Aarons-Guttman-Guttman
3 E−11003.501.501-Maurer Jr-Salvi6-Zivian-Lipson
1 W−11003.501.504-Keltner-Nussbaum5-Cohen-Ellen
3 NTS−1502.003.005-Weiss-Shrut2-Mighdoll-Behrman
2 W21101.004.003-Harris-Gowder3-Barash-Shaftel
2 NTE31500.005.002-Cusumano-Gracie1-Denenberg-Greenhutt

Board 7
South Deals
Both Vul
Q 7 6 5 2
8 6 2
7
Q 6 4 3
4
7 3
A Q 10 9 6 3
K 10 5 2
N
WE
S
A K J 10
K J 5
8 5 4 2
A 9
9 8 3
A Q 10 9 4
K J
J 8 7

E 6; EW 5N; W 5; E 4; EW 2; W 3; EW 1; Par −1370

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
2 NTW41805.000.006-Oppenheim-Liehr4-Aarons-Guttman-Guttman
3 NTE46303.501.504-Keltner-Nussbaum5-Cohen-Ellen
3 NTE46303.501.505-Weiss-Shrut2-Mighdoll-Behrman
3 NTE66901.004.001-Maurer Jr-Salvi6-Zivian-Lipson
3 NTE66901.004.002-Cusumano-Gracie1-Denenberg-Greenhutt
3 NTW66901.004.003-Harris-Gowder3-Barash-Shaftel

Board 8
West Deals
None Vul
A Q
8 6 5
10
A J 10 8 5 4 2
K 9 8 4 2
A 10 2
J 6 3
K 3
N
WE
S
7 6
K 9 7 4
Q 8 5 2
Q 7 6
J 10 5 3
Q J 3
A K 9 7 4
9

NS 3N; NS 4; NS 2; NS 1; NS 1; Par +400

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
3 NTN44305.000.003-Harris-Gowder3-Barash-Shaftel
3 NTS34003.501.501-Maurer Jr-Salvi6-Zivian-Lipson
3 NTS34003.501.504-Keltner-Nussbaum5-Cohen-Ellen
3 N41301.503.502-Cusumano-Gracie1-Denenberg-Greenhutt
3 N41301.503.506-Oppenheim-Liehr4-Aarons-Guttman-Guttman
3 NTS−52500.005.005-Weiss-Shrut2-Mighdoll-Behrman

Board 9
North Deals
E-W Vul
A 8 5
K J 10 4
7 5
K 5 4 2
J 10 9 7 6 3
A Q 8
10 6
10 7
N
WE
S
Q 4 2
9 7
K Q J 2
A Q J 6
K
6 5 3 2
A 9 8 4 3
9 8 3

EW 3; W 2N; E 1N; NS 1; EW 1; EW 1; Par −140

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 W−33005.000.002-Cusumano-Gracie6-Zivian-Lipson
4 E−11004.001.006-Oppenheim-Liehr3-Barash-Shaftel
2 W31403.002.005-Weiss-Shrut1-Denenberg-Greenhutt
2 W41702.003.001-Maurer Jr-Salvi5-Cohen-Ellen
4 E46201.004.004-Keltner-Nussbaum4-Aarons-Guttman-Guttman
4 W56500.005.003-Harris-Gowder2-Mighdoll-Behrman

Board 10
East Deals
Both Vul
K Q 6 2
A 4
A 9 4
A J 5 2
A 8 4 3
Q J
K 10 3
9 7 6 3
N
WE
S
J 9
K 10 8 7 6 5 3
Q 7 5
4
10 7 5
9 2
J 8 6 2
K Q 10 8

EW 3; NS 2N; NS 2; NS 3; NS 3; Par −140

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
3 ×E−12005.000.003-Harris-Gowder2-Mighdoll-Behrman
2 NTN31504.001.006-Oppenheim-Liehr3-Barash-Shaftel
1 NTN21203.002.001-Maurer Jr-Salvi5-Cohen-Ellen
2 NTN−22002.003.005-Weiss-Shrut1-Denenberg-Greenhutt
5 S−33001.004.004-Keltner-Nussbaum4-Aarons-Guttman-Guttman
2 ×E38700.005.002-Cusumano-Gracie6-Zivian-Lipson

Board 11
South Deals
None Vul
6
K 10 8 4 3 2
J 6
9 8 4 2
A K J 5 4 2
9 7
10 8 7 5
10
N
WE
S
Q 10 9 8
Q 6 5
A 9 2
A 5 3
7 3
A J
K Q 4 3
K Q J 7 6

EW 3; NS 4; EW 2N; NS 2; E 1; Par +100: EW 4×−1

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 ×W−11005.000.003-Harris-Gowder2-Mighdoll-Behrman
4 W−1504.001.004-Keltner-Nussbaum4-Aarons-Guttman-Guttman
5 ×N−11002.003.001-Maurer Jr-Salvi5-Cohen-Ellen
5 ×N−11002.003.002-Cusumano-Gracie6-Zivian-Lipson
5 ×N−11002.003.006-Oppenheim-Liehr3-Barash-Shaftel
2 W31400.005.005-Weiss-Shrut1-Denenberg-Greenhutt

Board 12
West Deals
N-S Vul
3
10 5
A 8 6 3
A 9 8 7 4 3
K J 9 8 7
9 7
K Q J 7
J 5
N
WE
S
Q 5 4
A K J 4
5 2
K Q 10 6
A 10 6 2
Q 8 6 3 2
10 9 4
2

EW 3N; EW 3; EW 1; EW 1; Par −400

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
2 E−21004.500.501-Maurer Jr-Salvi5-Cohen-Ellen
4 ×E−11004.500.504-Keltner-Nussbaum4-Aarons-Guttman-Guttman
4 E−1502.502.502-Cusumano-Gracie6-Zivian-Lipson
4 W−1502.502.505-Weiss-Shrut1-Denenberg-Greenhutt
3 W31401.004.006-Oppenheim-Liehr3-Barash-Shaftel
3 NTE34000.005.003-Harris-Gowder2-Mighdoll-Behrman

Board 13
North Deals
Both Vul
A 9
A J 7 2
9 7 5 3
K 6 2
K 10 6
6 5 4
K J 10 6
A 5 3
N
WE
S
J 8 7 5 4 2
10 8
Q 8 4
Q J
Q 3
K Q 9 3
A 2
10 9 8 7 4

NS 3; NS 3; NS 1N; EW 1; EW 1; Par +140

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 S46204.001.002-Cusumano-Gracie5-Cohen-Ellen
4 N46204.001.005-Weiss-Shrut6-Zivian-Lipson
4 N46204.001.006-Oppenheim-Liehr2-Mighdoll-Behrman
3 S52002.003.001-Maurer Jr-Salvi4-Aarons-Guttman-Guttman
2 S41701.004.004-Keltner-Nussbaum3-Barash-Shaftel
3 S31400.005.003-Harris-Gowder1-Denenberg-Greenhutt

Board 14
East Deals
None Vul
K 10 6 3
K 6 5 4 3
A K 6 5
K 8 6 5
A Q 9 7
J 10 9 7 2
N
WE
S
A J 10 7 4 3 2
Q J
8 2
Q 8
Q 9
A 9 8 7 5 4 2
J 10
4 3

NS 6; W 5; E 4; NS 2; EW 1; Par +100: W 6×−1

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
5 N64805.000.001-Maurer Jr-Salvi4-Aarons-Guttman-Guttman
5 ×E−11004.001.006-Oppenheim-Liehr2-Mighdoll-Behrman
6 ×S−23003.002.002-Cusumano-Gracie5-Cohen-Ellen
4 E54501.503.503-Harris-Gowder1-Denenberg-Greenhutt
4 E54501.503.504-Keltner-Nussbaum3-Barash-Shaftel
4 E64800.005.005-Weiss-Shrut6-Zivian-Lipson

Board 15
South Deals
N-S Vul
9 4
J 10 5 3
A Q
Q 6 5 4 3
6 5
A 4 2
K 4
K 10 9 8 7 2
N
WE
S
Q 10 8
K Q 9 7
7 6 5 2
A J
A K J 7 3 2
8 6
J 10 9 8 3

NS 5; NS 5; NS 1N; EW 2; Par +650

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 E−52505.000.002-Cusumano-Gracie5-Cohen-Ellen
3 E−42003.501.501-Maurer Jr-Salvi4-Aarons-Guttman-Guttman
2 S52003.501.506-Oppenheim-Liehr2-Mighdoll-Behrman
2 S41702.003.003-Harris-Gowder1-Denenberg-Greenhutt
4 W41301.004.005-Weiss-Shrut6-Zivian-Lipson
5 ×S−25000.005.004-Keltner-Nussbaum3-Barash-Shaftel

Board 16
West Deals
E-W Vul
A K 2
A K Q 6 3
Q
J 9 3 2
J 10 4
10 7 5
A J 10 8 6 3
A
N
WE
S
9 5 3
8 2
9
K Q 10 8 7 6 4
Q 8 7 6
J 9 4
K 7 5 4 2
5

NS 4N; NS 4; NS 4; NS 2; EW 1; Par +430

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 N44203.002.001-Maurer Jr-Salvi4-Aarons-Guttman-Guttman
4 N44203.002.002-Cusumano-Gracie5-Cohen-Ellen
4 N44203.002.004-Keltner-Nussbaum3-Barash-Shaftel
4 N44203.002.005-Weiss-Shrut6-Zivian-Lipson
4 N44203.002.006-Oppenheim-Liehr2-Mighdoll-Behrman
4 N−1500.005.003-Harris-Gowder1-Denenberg-Greenhutt

Board 17
North Deals
None Vul
K 10
A 9 7 6 3
Q 9 8 5 4
5
A J 3
K J 10 4 2
J 10
A 9 2
N
WE
S
9 8 7 5 2
Q
A
K Q 8 6 4 3
Q 6 4
8 5
K 7 6 3 2
J 10 7

EW 4; EW 5; EW 2N; EW 2; NS 3; Par −300: NS 5×−2

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
2 N31105.000.002-Cusumano-Gracie4-Aarons-Guttman-Guttman
4 W−1504.001.003-Harris-Gowder6-Zivian-Lipson
4 E51503.002.005-Weiss-Shrut5-Cohen-Ellen
5 E54002.003.001-Maurer Jr-Salvi3-Barash-Shaftel
4 E44200.504.504-Keltner-Nussbaum2-Mighdoll-Behrman
4 E44200.504.506-Oppenheim-Liehr1-Denenberg-Greenhutt

Board 18
East Deals
N-S Vul
K 5
A Q 8 7 2
10
A K 7 3 2
A Q 10 9
6 4
A K J
J 9 6 4
N
WE
S
7 6 4 3
K 5 3
9 7 6
10 8 5
J 8 2
J 10 9
Q 8 5 4 3 2
Q

NS 4; S 3; NS 2; N 2; EW 1; Par +500: EW 4×−3

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 N46204.500.501-Maurer Jr-Salvi3-Barash-Shaftel
4 N46204.500.502-Cusumano-Gracie4-Aarons-Guttman-Guttman
3 N41702.502.504-Keltner-Nussbaum2-Mighdoll-Behrman
2 N41702.502.506-Oppenheim-Liehr1-Denenberg-Greenhutt
3 N31401.004.003-Harris-Gowder6-Zivian-Lipson
4 S−22000.005.005-Weiss-Shrut5-Cohen-Ellen

Board 19
South Deals
E-W Vul
A Q J 3
J 10 7 4
10 5 4 3
10
10 9 7 4 2
A K 2
Q 7 6
J 8
N
WE
S
K 8 6
8 3
A K 8 2
K Q 9 5
5
Q 9 6 5
J 9
A 7 6 4 3 2

EW 3N; EW 3; EW 2; EW 1; Par −600

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 W−33005.000.005-Weiss-Shrut5-Cohen-Ellen
4 E−11003.501.503-Harris-Gowder6-Zivian-Lipson
3 W−11003.501.504-Keltner-Nussbaum2-Mighdoll-Behrman
3 N−1502.003.002-Cusumano-Gracie4-Aarons-Guttman-Guttman
3 NTE36001.004.006-Oppenheim-Liehr1-Denenberg-Greenhutt
3 NTE46300.005.001-Maurer Jr-Salvi3-Barash-Shaftel

Board 20
West Deals
Both Vul
A J 10 5
A K J 7 5
A 8
Q 5
Q 9 8 7 6
10 6
K Q 9 7
9 6
N
WE
S
2
3
10 6 5 4 3 2
10 8 4 3 2
K 4 3
Q 9 8 4 2
J
A K J 7

NS 7N; NS 7; NS 6; NS 5; EW 2; Par +2220

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
7 N722105.000.001-Maurer Jr-Salvi3-Barash-Shaftel
6 N714603.002.002-Cusumano-Gracie4-Aarons-Guttman-Guttman
6 N714603.002.003-Harris-Gowder6-Zivian-Lipson
6 N714603.002.004-Keltner-Nussbaum2-Mighdoll-Behrman
4 S77100.504.505-Weiss-Shrut5-Cohen-Ellen
4 N77100.504.506-Oppenheim-Liehr1-Denenberg-Greenhutt

Board 21
North Deals
N-S Vul
9 7 6 4 2
7 5 4
A 6 2
6 4
A Q 5 3
10 8 6 3
K 9 7
K 9
N
WE
S
J
A K J 2
10 8 4
A J 8 7 5
K 10 8
Q 9
Q J 5 3
Q 10 3 2

EW 5; EW 3N; EW 4; EW 2; EW 3; Par −450

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 W−21005.000.001-Maurer Jr-Salvi2-Mighdoll-Behrman
4 E−1503.501.503-Harris-Gowder5-Cohen-Ellen
6 W−1503.501.506-Oppenheim-Liehr6-Zivian-Lipson
4 W44201.503.504-Keltner-Nussbaum1-Denenberg-Greenhutt
4 W44201.503.505-Weiss-Shrut4-Aarons-Guttman-Guttman
4 W54500.005.002-Cusumano-Gracie3-Barash-Shaftel

Board 22
East Deals
E-W Vul
A 6 4 3 2
9 6
6 5 3
A 6 5
10 8 5
A 8 5 4 2
8
Q J 8 3
N
WE
S
K J
10 7
K Q 10 4 2
K 10 7 4
Q 9 7
K Q J 3
A J 9 7
9 2

NS 2; NS 1N; EW 2; EW 1; Par +110

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
2 N41705.000.002-Cusumano-Gracie3-Barash-Shaftel
2 N21104.001.001-Maurer Jr-Salvi2-Mighdoll-Behrman
3 N−1503.002.006-Oppenheim-Liehr6-Zivian-Lipson
2 E2902.003.004-Keltner-Nussbaum1-Denenberg-Greenhutt
3 N−21000.504.503-Harris-Gowder5-Cohen-Ellen
2 N−21000.504.505-Weiss-Shrut4-Aarons-Guttman-Guttman

Board 23
South Deals
Both Vul
8 7
10 7 3
A K 3
K 8 5 4 2
A J 6 5 3 2
K Q 6
J 10 2
10
N
WE
S
K Q 4
J 2
9 7 6 5
A 7 6 3
10 9
A 9 8 5 4
Q 8 4
Q J 9

EW 3; EW 1N; NS 2; NS 1; EW 1; Par −140

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
4 W−11004.500.503-Harris-Gowder5-Cohen-Ellen
4 W−11004.500.506-Oppenheim-Liehr6-Zivian-Lipson
3 W31401.503.501-Maurer Jr-Salvi2-Mighdoll-Behrman
2 W31401.503.502-Cusumano-Gracie3-Barash-Shaftel
3 W31401.503.504-Keltner-Nussbaum1-Denenberg-Greenhutt
3 W31401.503.505-Weiss-Shrut4-Aarons-Guttman-Guttman

Board 24
West Deals
None Vul
Q J 6 5
10 7 5 2
10 7 4
6 4
A 9 4 3
9 6
A J 9 5 3
K J
N
WE
S
7 2
A K Q J
K 6 2
A 9 5 3
K 10 8
8 4 3
Q 8
Q 10 8 7 2

EW 7N; EW 7; EW 7; EW 4; EW 4; Par −1520

ContractScoreMatchpointsPairPair
   N-SE-WN-SE-WN-SE-W
3 NTW64904.500.502-Cusumano-Gracie3-Barash-Shaftel
3 NTE64904.500.503-Harris-Gowder5-Cohen-Ellen
3 NTE75202.003.001-Maurer Jr-Salvi2-Mighdoll-Behrman
3 NTE75202.003.004-Keltner-Nussbaum1-Denenberg-Greenhutt
3 NTE75202.003.005-Weiss-Shrut4-Aarons-Guttman-Guttman
6 NTE710200.005.006-Oppenheim-Liehr6-Zivian-Lipson