Method: Rudoku#reduce

Defined in:
lib/rudoku.rb

#reduce ⇒ Object 



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# File 'lib/rudoku.rb', line 91

def reduce
  success = false
  @n.times { |r| @n.times { |c|
    if (sz = @arr[r][c].size) > 1
      @arr[r][c] = @arr[r][c] -
      (@rfix[r] | @cfix[c] | @bfix[rc2box(r, c)])
      raise "impossible to solve" if @arr[r][c].empty?
      if @arr[r][c].size < sz
        success = true
        update_fix(r, c)
      end
    end
  } }
  success
end