Problems by Ragnar Groot Koerkamp

	Submissions				Users
Name	Total	Acc.	Ratio	Fastest	Total	Acc.	Ratio	Difficulty
Daily Division	54	18	33%	0.07	20	15	75%	6.7
Detour	504	143	28%	0.04	143	115	80%	3.9
Disastrous Doubling	794	213	27%	0.01	212	181	85%	3.9
Harry the Hamster	21	7	33%	0.11	10	7	70%	7.7
Isomorphic Inversion	245	65	27%	0.01	61	43	70%	6.3
Janitor Troubles	516	351	68%	0.00	350	337	96%	1.5
Journal Editing	93	16	17%	0.14	18	14	78%	6.7
Jumping Choreography	48	18	38%	0.90	13	10	77%	6.0
Jurassic Jigsaw	86	41	48%	0.01	35	33	94%	3.2
KALLAX Construction	51	12	24%	0.00	13	11	85%	5.6