Guide
Choose a difficulty, complete reading squares, and follow your board achievements.
Published 2026-08-13 · Reviewed 2026-08-15
Bingo 2026 is an optional reading challenge with Easy, Normal, and Hard boards.
Open a square to read its requirement and see how completion is recorded. Some squares can be marked manually, some can respond to activity elsewhere in ARC Library, and some ask you to connect a tracked book.
Lines and larger board patterns can unlock achievements as you complete the right squares. Changing your Library later does not mean you should mark a square that was never completed; use the square's own requirement as the source of truth.
Square details, the book picker, challenge progress, and the full-card view keep keyboard focus inside while open. Press Escape to close the active layer and return to the control you used.
Choose the difficulty that makes reading feel motivating rather than burdensome.