class-projects

a collection of Java code to solve problems in an "Intro to Java" class. good times. :)

with locked-lines and locked-blocks

possible values: (0,1)=[2, 3] (0,2)=[2, 3, 4] (0,4)=[2, 9] (0,5)=[4, 9] (0,6)=[3, 4, 6, 7, 9] (0,8)=[3, 4, 6, 7] <-- 0,6 and 0,8 are 6,7 pair (hidden pair) (1,1)=[3, 5, 8] (1,2)=[3, 4, 5, 8] (1,3)=[1, 3, 8, 9] (1,4)=[1, 8, 9] (1,7)=[4, 5, 9] (1,8)=[3, 4, 5] (2,2)=[2, 3, 4, 5, 8] (2,3)=[2, 3, 8] (2,5)=[4, 8] (2,6)=[3, 4] (2,7)=[4, 5]

(3,0)=[4, 5, 8] (3,1)=[5, 7, 8] (3,2)=[5, 8, 9] (3,3)=[1, 6, 8, 9] (3,4)=[1, 5, 6, 8, 9] (3,6)=[1, 4, 6, 7, 8, 9] (3,8)=[4, 6, 7, 8] (4,0)=[2, 4, 8] (4,1)=[2, 7, 8] (4,3)=[6, 8, 9] (4,5)=[7, 8, 9] (4,7)=[2, 4, 6, 9] (4,8)=[4, 6, 7, 8] (5,0)=[2, 3, 5, 8] (5,2)=[2, 3, 5, 8, 9] (5,4)=[1, 5, 8, 9] (5,5)=[1, 5, 7, 8, 9] (5,6)=[1, 7, 8, 9] (5,7)=[1, 2, 9] (5,8)=[7, 8]

(6,1)=[1, 2, 3, 5, 8] (6,2)=[2, 3, 5, 8] (6,3)=[1, 2, 6, 8] (6,5)=[1, 5, 8] (6,6)=[1, 3, 6, 8] (6,8)=[3, 5, 6, 8] (7,0)=[2, 3, 5, 8] (7,1)=[1, 2, 3, 5, 8] (7,4)=[1, 2, 5, 8] (7,5)=[1, 5, 8] (7,6)=[1, 3, 4, 8] (7,7)=[1, 4, 5] (8,0)=[5, 8] (8,3)=[1, 6, 8, 9] (8,4)=[1, 5, 6, 8, 9] (8,6)=[1, 6, 8] (8,7)=[1, 5, 6]

The given Sudoku puzzle is unsolvable (by this app) hard puzzle solved: 1 ? ? 5 ? ? ? 8 ? 7 ? ? ? ? 6 2 ? ? 6 9 ? ? 7 ? ? ? 1 ? ? ? ? ? 2 ? 3 ? ? ? 1 ? 3 ? 5 ? ? ? 6 ? 4 ? ? ? ? ? 9 ? ? ? 4 ? ? 7 ? ? ? 6 7 ? ? ? ? 9 ? 4 7 ? ? 3 ? ? 2

with hidden-pairs

(0,1)=[2, 3] (0,2)=[2, 3, 4] (0,4)=[2, 9] (0,5)=[4, 9] (0,6)=[6, 7] (0,8)=[6, 7] <-- 0,6 and 0,8 are 6,7 pair (hidden pair) (1,1)=[5, 8] (1,2)=[4, 5, 8] (1,3)=[1, 3, 8] (1,4)=[1, 8] (1,7)=9 (1,8)=[3, 4, 5] (2,2)=[2, 4, 5, 8] (2,3)=[2, 3, 8] (2,5)=[4, 8] (2,6)=[3, 4] (2,7)=[4, 5]

(3,0)=[4, 5, 8] (3,1)=[5, 7, 8] (3,2)=[5, 8, 9] (3,3)=[1, 6, 8, 9] (3,4)=[1, 5, 6, 8, 9] (3,6)=[1, 4, 6, 7, 8, 9] (3,8)=[4, 6, 7, 8] (4,0)=[2, 4, 8] (4,1)=[2, 7, 8] (4,3)=[6, 8, 9] (4,5)=[7, 8, 9] (4,7)=[2, 4, 6, 9] (4,8)=[4, 6, 7, 8] (5,0)=[2, 3, 5, 8] (5,2)=[2, 3, 5, 8, 9] (5,4)=[1, 5, 8, 9] (5,5)=[1, 5, 7, 8, 9] (5,6)=[1, 7, 8, 9] (5,7)=[1, 2, 9] (5,8)=[7, 8]

(6,1)=[1, 2, 3, 5, 8] (6,2)=[2, 3, 5, 8] (6,3)=[1, 2, 6, 8] (6,5)=[1, 5, 8] (6,6)=[1, 3, 6, 8] (6,8)=[3, 5, 6, 8] (7,0)=[2, 3, 5, 8] (7,1)=[1, 2, 3, 5, 8] (7,4)=[1, 2, 5, 8] (7,5)=[1, 5, 8] (7,6)=[1, 3, 4, 8] (7,7)=[1, 4, 5] (8,0)=[5, 8] (8,3)=[1, 6, 8, 9] (8,4)=[1, 5, 6, 8, 9] (8,6)=[1, 6, 8] (8,7)=[1, 5, 6]