ELO: 0v0, 9999v1 upset, 9999v1 expected, NaN/Infinity check. Challenge rotation: 16 unique types, reset after exhaustion, filter exclusion works. Total: 24 edge case tests. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
ELO: 0v0, 9999v1 upset, 9999v1 expected, NaN/Infinity check. Challenge rotation: 16 unique types, reset after exhaustion, filter exclusion works. Total: 24 edge case tests. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>