Knight's tour: Difference between revisions

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@@ Line 8,551: / Line 8,551: @@
 dnl  Extract the nth position from the path.
-define(`path_nth',
+define(`path_nth',`substr($1,eval(( $2 ) * 2),2)')
-`ifelse($2,0,`path_car($1)',`path_nth(path_cdr($1),eval(( $2 ) - 1))')')
-define(`random_position',`path_nth($1,randnum(path_length($1)))')
+define(`random_move',`path_nth($1,randnum(path_length($1)))')
 dnl  Is the position $1 contained in the path $2?
@@ Line 8,612: / Line 8,611: @@
 `pushdef(`moves',next_moves($2))`'dnl
 ifelse(moves,`',`find_tour($1)',
-       `find_tour($1,$2`'random_position(next_moves($2)))')`'dnl
+       `find_tour($1,$2`'random_move(next_moves($2)))')`'dnl
 popdef(`moves')')')