CLASSIC 01 / 9 × 936 / 81
Select a cell, then enter 1–9. Arrow keys move; Backspace erases.
BEYOND THE NEXT MOVE
All field notes ↗Go deeper: explain your next move
Xiangqi / FIELD NOTES
Xiangqi checkmate: count the escapes before you check
Work through three small positions to distinguish a check from mate, explain each chariot’s job and see how one horse changes the answer.
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Sudoku / FIELD NOTES
Sudoku after singles: pairs and locked candidates, explained
Learn why candidate eliminations work, when a pair is valid and how a box can restrict a row. Includes counterexamples and a self-check.
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Go / FIELD NOTES
Your Go group is in atari: count, connect or capture?
Count shared liberties, compare an extension with a capture and learn why adding a stone may not improve safety. Worked coordinates and a self-check included.
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