I thought this puzzle was quite easy which I characterize as not having to make any guesses. My sure-fire logical solution method involves SETUP, CHECK and PLAY. SETUP involves entering missing digits in all the empty squares. Missing digit entries are CHECKed for each empty square by counting the number of given digits in the box plus the number of DIFFERENT givens in its row and column OUTSIDE the box. If the total of givens plus the number of missing digits is 9, it's correct. Disregarding the hyper boxes, make PLAYS as far as possible by making an entry and crossing out the digit entered wherever it appears as a missing digit in the box, row and column. Then look for a missing digit appearing only once in a hyper box. Make that play and any plays it creates in the 9x9. Proceding in this manner will lead to the final solution.
I thought this puzzle was quite easy which I characterize as not having to make any guesses. My sure-fire logical solution method involves SETUP, CHECK and PLAY. SETUP involves entering missing digits in all the empty squares. Missing digit entries are CHECKed for each empty square by counting the number of given digits in the box plus the number of DIFFERENT givens in its row and column OUTSIDE the box. If the total of givens plus the number of missing digits is 9, it's correct. Disregarding the hyper boxes, make PLAYS as far as possible by making an entry and crossing out the digit entered wherever it appears as a missing digit in the box, row and column. Then look for a missing digit appearing only once in a hyper box. Make that play and any plays it creates in the 9x9. Proceding in this manner will lead to the final solution.
ReplyDelete