Chess Data

These data contain the mean number of chess pieces over a series of positions that could be recalled in a test of memory for chess positions. There are 10 subjects per group.
Nonplayers Beginners Tournament Players
22.1
22.3
26.2
29.6
31.7
33.5
38.9
39.7
43.2
43.2
32.5
37.1
39.1
40.5
45.5
51.3
52.6
55.7
55.9
57.7
40.1
45.6
51.2
56.4
58.1
71.1
74.9
75.9
80.3
85.3