Figure 1
Raw record-setting solve counts by local time of day for all four events. Panels show 3 × 3 × 3 (blue, n = 1,763), 4 × 4 × 4 (green, n = 1,678), 5 × 5 × 5 (red, n = 1,755), and 6 × 6 × 6 (purple, n = 1,404). Bars represent counts in 15-minute bins by local civil time of scheduled round start. WR/CR/NR breakdown shown in panel titles. No exposure adjustment applied.
Figure 2
Exposure-adjusted record probability by local time of day (10,000-iteration within-competition permutation null). Solid lines show observed rates (records per N attempts) with 95% Poisson confidence intervals (shaded ribbons). Gray dashed bands show the 95% permutation null interval. Yellow shading marks the post-prandial window (12:30–15:00). **p < 0.05, one-tailed permutation test. n and WR/CR/NR breakdown in panel titles. Minimum-attempts thresholds: 3 × 3 × 3, 10,000; 4 × 4 × 4, 7,825; 5 × 5 × 5, 3,954; 6 × 6 × 6, 977.