Normal Sudoku rules apply. Circled digits must equal the sum of the digits on their attached arrow. Cells separated by a knight's move (in chess) may not contain the same digit. Bifurcation is not necessary!
Normal Sudoku rules apply. Circled digits must equal the sum of the digits on their attached arrow. Cells separated by a knight's move (in chess) may not contain the same digit. Bifurcation is not necessary!