This is an uncompleted Sixex puzzle with no hints given. These 14 pictures will demonstrate how this puzzle can be completed. This is just one way to complete the puzzle. (There are always multiple paths to completion.) If you don’t know how to play Sixex, basically there is a 4X4 grid that contains the numbers 1 through 10. There will also be 6 boxes that do not contain numbers. These boxes should be filled in with an X. The number in the upper right hand corner of each box will tell you how many boxes with numbers border this box (on all sides and corners). The clue in the upper left hand corner will tell you the sum total of all these bordering boxes.

D4 must have a 9 and two X’s bordering it.

D2 must be bordered by 4 numbers: C1, C2 and D1 must contain numbers.

Either C3 or D3 must have a number so that D2 will be bordered by 4 numbers: C4 is an X. D1 is already bordered by two numbers: D2 is an X.

D3 must be bordered by 3 numbers: C3 is 9 and D4 is a number. D4 is already bordered by one number: D3 is an X.

D1 tells us that C1+C2=11. D2 is bordered by those numbers and C3 (which is 9) and 22-(11+9)=2: D1 is 2.

C4 must by bordered by 3 numbers, so either B3 or B4 is a number. A4 must be bordered by one more number: A3 is a number.

A2 needs to be bordered by one more number. A1 needs two bordering numbers and they can’t both be in B1/B2: A2 is a number. A2 is now bordered by 2 numbers: B3 is an X. A4 needs to be bordered by one more number: B4 is a number.

C3 is already bordered by three numbers: B1 is a number and B2 is X.

B2 is already bordered by six numbers: A1 is X. B3 needs to be bordered by one more number: A4 is a number.

D1 tells us that C1+C2=11. B1 needs to have a sum of 14: A2 is 5. A1 needs to have a sum of 9: B2 is 4.

A2 needs a sum of 7: A3 is 3. A4 needs a sum of 11: B4 is 8.

A3 needs a sum of 20: A4 is 7. C4 needs a sum of 23: D4 is 6.

D3 needs a sum of 25: C2 is 10. By default: C1 is 1.