most challenges lost per team in an nhl season

The Chicago Black Hawks have lost the most games by a team against a team in a season, with 13 losses against the Red Wings in 1950-51.

	TEAM	L	OPP	SEASON	GP	W	T	PTS	PTS%	G	GA	DIFF	S/GP	S%	SA/GP	SV%
1	Black Hawks	13	Red Wings	1950-51	14	1	0	2	.071	26	68	-42
2	Rangers	12	Canadiens	1965-66	14	2	0	4	.143	33	65	-32	26.86	8.8	36.29	.872
3	Black Hawks	12	Canadiens	1955-56	14	1	1	3	.107	19	58	-39	29.64	4.6	33.43	.876
4	Black Hawks	12	Red Wings	1954-55	14	1	1	3	.107	22	50	-28
5	Black Hawks	12	Red Wings	1951-52	14	2	0	4	.143	24	50	-26
6	Bruins	11	Black Hawks	1966-67	14	2	1	5	.179	28	59	-31	30.21	6.6	32.07	.869
7	Bruins	11	Maple Leafs	1966-67	14	2	1	5	.179	32	51	-19	33.86	6.8	32.21	.887
8	Bruins	11	Red Wings	1965-66	14	2	1	5	.179	35	64	-29	30.21	8.3	35.36	.871
9	Red Wings	11	Black Hawks	1965-66	14	1	2	4	.143	27	51	-24	31.21	6.2	24.50	.851
10	Rangers	11	Canadiens	1960-61	14	2	1	5	.179	41	63	-22	30.43	9.6	41.50	.892
11	Rangers	11	Black Hawks	1959-60	14	1	2	4	.143	19	50	-31	30.71	4.4	30.79	.884
12	Maple Leafs	11	Canadiens	1957-58	14	2	1	5	.179	32	61	-29	28.36	8.1	32.43	.866
13	Black Hawks	11	Canadiens	1954-55	14	0	3	3	.107	34	64	-30
14	Black Hawks	11	Bruins	1953-54	14	1	2	4	.143	31	49	-18
15	Black Hawks	11	Red Wings	1953-54	14	2	1	5	.179	27	58	-31
16	Black Hawks	11	Maple Leafs	1953-54	14	3	0	6	.214	18	42	-24
17	Red Wings	10	Canadiens	1966-67	14	4	0	8	.286	32	42	-10	30.86	7.4	34.21	.912
18	Red Wings	10	Black Hawks	1966-67	14	4	0	8	.286	38	60	-22	33.36	8.1	31.93	.866
19	Bruins	10	Red Wings	1964-65	14	3	1	7	.250	29	56	-27	26.50	7.8	38.36	.896
20	Rangers	10	Red Wings	1964-65	14	2	2	6	.214	36	58	-22	25.07	10.3	36.14	.885
21	Bruins	10	Canadiens	1964-65	14	3	1	7	.250	33	53	-20	25.00	9.4	38.21	.901
22	Rangers	10	Canadiens	1964-65	14	2	2	6	.214	28	54	-26	26.79	7.5	36.29	.894
23	Bruins	10	Red Wings	1963-64	14	3	1	7	.250	24	38	-14	27.21	6.3	36.71	.926
24	Rangers	10	Canadiens	1963-64	14	3	1	7	.250	31	55	-24	27.57	8.0	40.07	.902
25	Rangers	10	Black Hawks	1962-63	14	2	2	6	.214	37	53	-16	27.36	9.7	39.14	.903