▁a ▁ 5 – 4 ▁victory . ▁ ▁Washington ▁State ▁has ▁domin ated ▁the ▁local ▁rival ry , ▁holding ▁a ▁ ▁lead . ▁The ▁record ▁since ▁ 1 9 2 6 ▁is ▁even ▁more ▁dominant , ▁with ▁a ▁ ▁advantage ▁for ▁the ▁C oug ars . ▁The ▁longest ▁winning ▁stre ak ▁for ▁Id aho ▁was ▁three ▁games ▁( 1 9 2 3 – 1 9 2 5 ), ▁and ▁has ▁only ▁five ▁vict ories ▁since ▁that ▁three - peat ▁( 1 9 5 4 , ▁ 1 9 6 4 , ▁ 1 9 6 5 , ▁ 1 9 9 9 , ▁& ▁ 2 0 0 0 ) ▁and ▁two ▁t ies ▁( 1 9 2 7 , ▁ 1 9 5 0 ) ▁to ▁offset ▁the ▁ 5 6 ▁losses . ▁The ▁games ▁were ▁ski pped ▁in ▁ 1 9 6 9 ▁and ▁ 1 9 7 1 , ▁which ▁was ▁un fortun ate ▁for ▁Id aho ▁as ▁the ▁ 1 9 7 1 ▁V and als ▁posted ▁one ▁of ▁the ▁best ▁records ▁( 8 – 3 ) ▁in ▁school ▁history , ▁while ▁W SU ▁was ▁ 4 – 7 . ▁The ▁rival ry ▁became ▁increasing ly ▁one - s ided ▁as ▁W SU ▁domin ated ▁in ▁the ▁ 1 9 7 0 s ▁( except ▁for ▁ 1 9 7 4 ) ▁and ▁the ▁original ▁series ▁ended , ▁following ▁the ▁ 1 9 7 8 ▁game . ▁From ▁ 1 9 7 9 ▁to ▁ 1 9 9 7