Initial puzzle: ------------------- | | | |1| | |7|4| | ------------------- | |5| | |9| | |3|2| ------------------- | | |6|7| | |9| | | ------------------- |4| | |8| | | | | | ------------------- | |2| | | | | |1| | ------------------- | | | | | |9| | |5| ------------------- | | |4| | |7|3| | | ------------------- |7|3| | |2| | |6| | ------------------- | |6|5| | |4| | | | ------------------- Found solution! ------------------- |3|9|2|1|8|5|7|4|6| ------------------- |8|5|7|4|9|6|1|3|2| ------------------- |1|4|6|7|3|2|9|5|8| ------------------- |4|7|9|8|5|1|6|2|3| ------------------- |5|2|8|6|7|3|4|1|9| ------------------- |6|1|3|2|4|9|8|7|5| ------------------- |2|8|4|5|6|7|3|9|1| ------------------- |7|3|1|9|2|8|5|6|4| ------------------- |9|6|5|3|1|4|2|8|7| -------------------