@ -47,7 +47,7 @@
(map (λ (board) (mark-board board number)) boards))
(define (all-winners? lst) ; check if all pairs in the list are #t
(all? (λ (x) (match x ([cons _ on] on))) lst))
(all? cdr lst))
(define (is-winner? board) ; check if any row or column in the board is a winner
(let ([cols (transpose board)])