Problems by Ragnar Groot Koerkamp

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Daily Division	53	17	32%	0.07	19	14	74%	7.0
Detour	495	136	27%	0.04	142	114	80%	3.9
Disastrous Doubling	758	202	27%	0.01	203	172	85%	4.0
Harry the Hamster	21	7	33%	0.11	10	7	70%	7.6
Isomorphic Inversion	241	65	27%	0.01	60	43	72%	5.9
Janitor Troubles	408	286	70%	0.00	289	276	96%	1.6
Journal Editing	93	16	17%	0.14	18	14	78%	6.7
Jumping Choreography	47	17	36%	1.00	12	9	75%	6.1
Jurassic Jigsaw	82	37	45%	0.01	31	29	94%	3.7
KALLAX Construction	36	11	31%	0.00	11	10	91%	4.5