- The history of rugby through its competitions
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Ireland - National championship Season: Competition overview
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Interprovincial Championship

Interprovincial Championship 1990/91

Final results
Winner:Ulster

Regular season
Pos.TeamPtsPldWDLFADiff
1Ulster63300483018Winner
2Munster43201614912
3Leinster231023858-20
4Connacht030034555-10

Matches
Regular season
Leinster - Connacht20-18
Munster - Leinster27-12
Munster - Connacht19-18
Ulster - Leinster13-6
Ulster - Munster19-15
Ulster - Connacht16-9