The d'Orsi Senior Bowl, or Senior Bowl or d'Orsi Bowl, is a biennial world championship contract bridge tournament for national teams of "Seniors", players age 60 and older.^{[lower-alpha 1]} It is contested every odd-number year under the auspices of the World Bridge Federation (WBF), alongside the Bermuda Bowl (Open), Venice Cup (Women) and Wuhan Cup (Mixed). Entries formally represent WBF Zones as well as nations so it is also known as the "World Zonal Senior Team Championship", one of three "World Zonal Team Championships".^[1][2] It became an official world championship event in 2001 following a successful exhibition in 2000.

The d'Orsi Senior Bowl is also the trophy awarded to the winning team. It was donated at the 2009 tournament in Brazil by former WBF President Ernesto d'Orsi,^{[lower-alpha 2]} and the tournament was renamed at that time.^[3]

The most recent event took place in 2023 in Marrakech, Morocco.^[4]

The zonal quotas and structures are now identical for the Open, Women, and Seniors flights of Zonal Teams, and the three tournaments are concurrent. There are 22 teams —1 from the host country, 6 from Europe, and so on— each four to six players and a captain who may be one of the players.^{[lower-alpha 3]} They compete as teams-of-four with scoring by International Match Points (IMP).

For one week everyone plays round-robin matches of 16 deals, three daily matches (21 in all) with IMP margins converted to Victory Points (VP). Teams who draw get 15 points each, up to 25 for the winner and down to 0 for the loser.

The eight round-robin leaders continue in long knockout matches, 96 deals in two days (except 128 in three days for the Open final), with carryover as much as 16 IMP from the short matches between the same teams. The World Transnational Open Teams Championship begins after most teams are eliminated from the three major events; players on all but the four semifinalist teams in each flight are welcome to enter the Transnational.

For the 50th anniversary of the Bermuda Bowl in January 2000, the World Teams returned to Bermuda for Bermuda Bowl and Venice Cup tournaments completing the 1998–1999 cycle. A short exhibition for Seniors was added to the program, as was the (third) World Computer Bridge Championships.^{[5][lower-alpha 4]}

Six invited teams contested the exhibition for Seniors: four national teams, one from North America, and "World Champions" comprising one pair each from Austria, Bulgaria, and Israel.^[6] The two Austrians and two Israelis had played on both winners of the (transnational) World Senior Teams Championship, 1994 and 1998, with one of the two Bulgarians as a teammate in 1998.

The six played a double round-robin, ten matches of 20 deals, during the first five days of the main events, followed by two days of playoff matches. Thus all participants were able to enter the Transnational Open Teams contested during the second week of the main events.^[7]

Poland defeated France in the 60-deal final by 229 to 73 IMP. France scored slightly better in the first of three sessions but the second and third were routs by Poland.^[8]

More information Year, Site, Entries, Medalists ...

Year, Site, Entries		Medalists
2000[6][7] (exhibition) January 8–14 Southampton, Bermuda   6 teams	1.	Poland Aleksander Jezioro, Julian Klukowski, Janusz Nowak, Stefan Szenberg, Andrzej Wilkosz
	2.	France Pierre Adad, Maurice Aujaleu, Claude Delmouly, Jean-Marc Roudinesco
	3.	China Gu XUEHAI, Li Jin, Lu YULIN, Tang HOUZU, Lu ZHENTING

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Standings in the round-robin stage were identical to the final standings. Only Poland and France scored better than average (150 Victory Points, equivalent to ten ties) followed by China, North America, World Champions, and Australia.

In two one-day semifinals Poland beat North America 190–74 and France beat China 145–83,^[9] while World Champions won a fifth-place match against Australia 130–53.^[10] On the final day Poland beat France in 60 deals and China won third place in 40 deals against North America, 133 to 80.^[11]

Official world championship flights for Seniors were added to both the quadrennial World Team Olympiad beginning 2000 (ten months later) and to the biennial World Team Championships beginning 2001 (twenty months later).

The first Senior Bowl trophy debuted in 2001^{[citation needed]} and the eponymous tournament for senior teams joined the official "World Team Championships" program beside the Bermuda Bowl and Venice Cup for open and women teams.^[12] From eight teams in 2001 the field quickly expanded to match the other flights in size with 22 teams each by 2005.

United States teams won the first four Senior Bowls while the other United States team twice finished third. Three Americans in different combinations won three apiece: Roger Bates, Grant Baze, and Garey Hayden. Indonesia has won three medals and European teams have won eight, with England and France winning the last two Bowls.

More information Year, Site, Entries, Medalists ...

Year, Site, Entries		Medalists
2001[13][14] Oct 21–Nov 3 Paris, France 8 teams	1.	USA 2[lower-alpha 5] Grant Baze, Gene Freed, Garey Hayden, Joe Kivel, Chris Larsen, John Onstott
	2.	Poland Wit Klapper, Jerzy Russyan, Stefan Szenberg, Włodzimierz Wala, Andrzej Wilkosz
	3.	France Pierre Adad, Maurice Aujaleu, Claude Delmouly, François Leenhardt, Christian Mari, Marc Schneider
2003[15][16] November 2–15 Monte Carlo, Monaco 15 teams	1.	USA 1[lower-alpha 5] Roger Bates, Grant Baze, Garey Hayden, Gaylor Kasle, Steve Robinson, Kit Woolsey
	2.	France Pierre Adad, Maurice Aujaleu, Guy Lasserre, François Leenhardt, Christian Mari, Philippe Poizat
	3.	USA 2[lower-alpha 5] Dennis Dawson, Arnold Fisher, Zeke Jabbour, Clement Jackson, John Mohan, John Sutherlin
2005[17][18] Oct 22–Nov 5 Estoril, Portugal 22 teams	1.	USA 1[lower-alpha 5] Roger Bates, Garey Hayden, Rose Meltzer, Alan Sontag, Lew Stansby, Peter Weichsel
	2.	Indonesia Arwin Budirahardja, Henky Lasut, Eddy Manoppo, Denny Sacul, Munawar Sawiruddin, Amiruddin Yusuf
	3.	Denmark Jens Auken, Flemming Dahl, Peter Lund, Kirsten Steen Møller, Steen Møller, Georg Norris
2007[19][20] Sep 29–Oct 13 Shanghai, China 22 teams	1.	USA 2[lower-alpha 5] Roger Bates, Grant Baze, Bart Bramley, Rose Meltzer, Alan Sontag, Lew Stansby
	2.	Indonesia Henky Lasut, Anindara Lubis, Eddy Manoppo, Denny Sacul, Munawar Sawiruddin, Ferdinand Robert Waluyan
	3.	USA 1[lower-alpha 5] Dan Gerstman, Gaylor Kasle, Dan Morse, Ron Smith, John Sutherlin, Bobby Wolff
2009[21][22] Aug 29–Sep 12 São Paulo, Brazil 22 teams	1.	England Paul D Hackett, Gunnar Hallberg, Ross Harper, John Holland, David Price, Colin Simpson
	2.	Poland Julian Klukowski, Apolinary Kowalski, Krzysztof Lasocki, Victor Markowicz, Jacek Romanski, Jerzy Russyan
	3.	Indonesia Arianto Karna Djajanegara, Michael Bambang Hartono, Henky Lasut, Eddy Manoppo, Denny Sacul, Munawar Sawiruddin
2011[23][24] October 15–29 Veldhoven, Netherlands   22 teams	1.	France Patrick Grenthe, Guy Lasserre, François Leenhardt, Patrice Piganeau, Philippe Poizat, Philippe Vanhoutte
	2.	USA 2[lower-alpha 5] Peter Boyd, Neil Chambers, Gaylor Kasle, Larry Kozlove, Steve Robinson, John Schermer
	3.	Poland Julian Klukowski, Apolinary Kowalski, Krzysztof Lasocki, Victor Markowicz, Jacek Romanski, Jerzy Russyan

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France won the 2011 d'Orsi Bowl by 165 to 160 IMP in a two-day final match against USA 2,^[25] the second of two qualifiers from the United States.^{[lower-alpha 5]}

The Americans started with 6.33 IMP carryover from the 16-deal round-robin match, meaning France must score at least 7 IMP better on the 96 deals of the final. France yielded almost nothing during the first three segments, to lead overnight by 89 to 45+ including carryover. The Americans posted a huge fourth set, 79 IMP on 16 deals to regain the lead, but France again yielded almost nothing in the last two segments, and only 75 IMP on 80 deals in the five good segments.

The final lead change occurred on the 87th deal (#23) where France played 5♦ and made it while USA played at a 4♦ opening bid. France never led by so much as 11 IMP, which is attainable at once, and the final margin less than 5 IMP commonly scored at once. So the outcome "went to the end", even for spectators (who know the score, as players don't).^{[lower-alpha 6][26]}

There were 22 national teams in the field, who represented the eight WBF zones as follows.^[27] The regular quota for Europe is six teams, seven at Veldhoven because the host country qualifies automatically.^[28]

Europe: Poland, Denmark, Italy, France, Germany, Bulgaria, Netherlands —ranks 1 to 6 and 12 in the European championship^[29]

North America: Canada, USA 1, USA 2^{[lower-alpha 5]}

South America: Argentina, Brazil

Asia & Middle East: India, Pakistan

C. America & Carib.: Guadeloupe

Pacific Asia: China Hong Kong, Indonesia, Japan

South Pacific: Australia, New Zealand

Africa: Egypt, Reunion

The first stage was a full round-robin scheduled in advance.^{[lower-alpha 7]} Every team played 21 short matches of 16(?) deals at three per day.

2013[30][31] October 16–29 Nusa Dua, Bali   22 teams	1.	USA 2 Roger Bates, Garey Hayden, Marc Jacobus, Carolyn Lynch, Mike Passell, Eddie Wold
	2.	Poland[lower-alpha 5] Julian Klukowski, Apolinary Kowalski, Krzysztof Lasocki, Victor Markowicz, Jacek Romanski, Jerzy Russyan
	3.	France Patrick Grenthe, Guy Lasserre, Francois Leenhardt, Alain Levy, Philippe Poizat, Philippe Vanhoutte

There was a cheating scandal at the 2013 event. The original winners, Germany, were disqualified, and the WBF moved USA 2 to first place, Poland to second and France to third.

The 2015 championship, held in Chennai, India, was won by USA1 ahead of Sweden, with Poland third ahead of USA2.^[32]

2015[33][34] September 26 - October 10 Chennai, India   22 teams	1.	USA 1 Bob Hamman, Mark Lair, Hemant Lall, Zia Mahmood, Reese Milner, Michael Rosenberg, Petra Hamman (npc), Jacek Pszczola (coach)
	2.	Sweden Sven-Ake Bjerregard, Per Gunnar Eliasson, Anders Morath, Johnny Ostberg, Goran Sellden, Bjorn Wenneberg, Tommy Gullberg (npc), Carina Wademark (coach)
	3.	Poland Julian Klukowski, Apolinary Kowalski, Krzysztof Lasocki, Victor Markowicz, Jacek Romanski, Jerzy Russyan, Wlodzimierz Wala (npc), Andrzej Biernacki (coach)
2017[35][36] August 12-26 Lyon, France  22 teams	1.	USA 2 Michael Becker, David Berkowitz, Allan Graves, Neil Silverman, Alan Sontag, Jeff Wolfson, Steve Garner (npc)
	2.	Italy Andrea Buratti, Amedeo Comella, Giuseppe Failla, Aldo Mina, Ruggero Pulga, Stefano Sabbatini, Pierfrancesco Parolaro (npc)
	3.	Sweden Mats Axdorph, Christer Bjaring, Sven-Ake Bjerregard, Bengt-Erik Efraimsson, Anders Morath, Johnny Ostberg, Tommy Gullberg (npc), Carina Wademark (coach)
2019[37][38] September 14-28 Wuhan, China  24 teams	1.	Denmark Knud Aaage Boesgaard, Soren Christiansen, Henrik Norman Hansen, Jorgen Cilleborg Hansen, Hans Christian Nielsen, Steen Schou, Bo Loenberg Bilde (npc), Jan Nielsen (coach)
	2.	England John Holland, David Kendrick, Alan Mould, David Muller, Malcolm Pryor, Trevor Ward, David S Jones (npc)
	3.	India Sukamal Das, Subhash Dhakras, Dipak Poddar, Subrata Sabha, Jitendra Solani, Ramamurthy Sridharan, Vinay Desai (npc), Anal Shah (coach)
2022[39][40] March 27 - April 9 Salsomaggiore Terme, Italy  24 teams	1.	Poland Apolinary Kowalski, Michal Kwiecien, Victor Markowicz, Krzysztof Moszczynski, Jacek Romanski, Wlodzimierz Starkowski, Wlodzimierz Wala (npc)
	2.	India Rajesh Dalal, Sukamal Das, Ashok Kumar Goel, Anil Padhye, Krishnan Ramaratnam, Subrata Sabha
	3.	Denmark Klaus Adamsen, Jorgen Cilleborg Hansen, Dennis Koch-Palmund, Dorthe Schaltz, Peter Schaltz, Steen Schou, Peter Magnussen (npc), Bo Loenberg Bilde (coach)
		France Michel Abecassis, Marc Bompis, Alain Levy, Philippe Marill, Dominique Pilon, Philippe Soulet, Guy Lasserre (npc), Solange d'Elbee (coach)
2023[41][42] August 20 - September 2 Marrakech, Morocco  24 teams	1.	Denmark Klaus Adamsen, Jorgen Cilleborg Hansen, Dennis Koch-Palmund, Dorthe Schaltz, Peter Schaltz, Steen Schou, Peter Magnussen (npc), Morten Bilde (coach)
	2.	Poland Piotr Bizon, Marek Blat, Michal Kwiecien, Victor Markowicz, Krzysztof Moszczynski, Wlodzimierz Starkowski, Jacek Pszczola (npc), Miroslaw Cichocki (coach)
	3.	USA 1 Drew Casen, Andy Goodman, Venkatrao Koneru, Jim Krekorian, Mike Passell, Pratap Rajadhyaksha, Alex Kolesnik (npc)

There are eight geographic zones and eight associated zonal bridge federations, all permitted to enter at least one team in the Bermuda Bowl since 199? (Africa). The members of zonal bridge federations are national federations (NBOs) where "nations" are defined by NBO admission to membership in a WBF zonal federation and thus in the WBF. Wales, China Hong Kong, and French Polynesia are bridge nations in Europe, Pacific Asia, and South Pacific, for current examples.^[43] Zonal membership defines nominal geography: bridge Europe includes Lebanon and Israel,^[43] and previously included Egypt. Venezuela has represented South America (twice, 1966 and 1967) and Central American and the Caribbean (five or six of seven times, 1985 to 1997). ^[when?]Zones may be represented only by teams that comprise players from one nation,^[28] or national teams in one sense. Further, there may be only one entry from one nation, except that North America is permitted two from the United States in its quota of three.^[28] Some zones select representatives by international tournaments which permit only one team from any bridge nation; that is, by competition among national teams in a second sense. The European Team Championships are the oldest and largest example, where ranks 1 to 6 subsequently represent Europe in the World Teams. North America does routinely pass on the nominations of two United States teams (selected by the USBF) and selects its third by a two-team "tournament" if Canada and Mexico both choose to enter a national team.^{[citation needed]}

• World Team Olympiad
• 2021 World Bridge Team Championships