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+sudoku: case rules
+
+kchiu1 edited this page on Feb 6 · 5 revisions
+case rules:
+number for cell
+you can only fill in a cell with certain numbers.
+
+cell for number
+a number can only fit in certain cells in a group.
+
+contradiction rules
+repeated number (row/column)
+a number is repeated in a row or column (cannot place number)
+
+repeated number (cells)
+a number is repeated in a cell (cannot place number)
+
+no number for cell
+number cannot be placed because it would be a duplicate if placed
+
+no cell for number
+no numbers can be placed because of numbers outside the cell blocking it
+
+basic rules
+last number for cell
+the last number that can possibly be placed in a cell
+
+last cell for number
+the last number that can possibly be placed in a row or column
+
+
+TODO
+keep
+-controller
+-cell factory
+
+fix
+-rules (uncertain how well implemented they are)
+-elements (probably not number tiles)
+
+case rule
+number for cell
+cell for number change name (Originally "Possible cells for number")
+
+contradiction
+Repeated number Split into *repeated column, repeated row*, and repeated cell
+no number for cell
++no cell for number cannot place number because being squeezed by numbers outside the cell
+
+basic
+Last number for cell
+Last cell for number
+
+2/6 Update:
+Test Board: Basic Rules.14538464
+
+EXAMPLE BOARD
+image
+SOLUTION
+image
+Issues with existing code:
+
+possible numbers for cell/cell for number swapped (both wrong anyway)
+
+advanced deduction is a dev tool
+
+new contradiction, fix case rules, fix other rules
+
+fix names
+
+2/23 Update:
+NEW: add possible number for row, column, cell
+
+continue testing