Timer
00:00:00
Start Pause Reset
5 Comments Previous / NextHelp

Tough Sudoku for 18/April/2018

                 
                 
                 
                 
                 
                 
                 
                 
                 

Choose a number, and place it in the grid above.

  1 2 3 4 5 6 7 8 9
Check out the latest post in the Sudoku Forum

Sudoku Solving Techniques

Submitted by: sudoku lover

Indicate which comments you would like to be able to see

Basics to UP = 24
1. (7): b8 = b6 - e6 = e2 - h2 = h7 => -7g8 ; UP = 37
2. (9)a3 = a2 - (9=286)h2.i23 => -6a3 ; UP = 81
18/Apr/18 1:15 AM
Basics to 24
1.X-Chain x=7 =>{b6,c7,e6,f3,g8,h2} <>7
=> b8=7 OR h7=7 OR g3=7 OR e2=7 solve
18/Apr/18 1:33 AM
Basics to 24
1. X-chain (7)b8=g8-g3=f3-f5=c5 =>-7c7,b6 basics to 37
2. H-wing (9)h1=e1-df3=(9-6)a3=(6)i3 =>-6h1; singles to 81
18/Apr/18 3:01 AM
Basics to 24
1.X-Chain x=2 =>{a2,c2,i3} <>2
2.X-Chain x=4 =>{a5,c6,c4} <>4
3.X-Chain x=7 =>{b6,c7,e6,f3,g8,h2} <>7
=> b8=7 Basics to 39
4.XY-wing 469 e1-e9-h1 => h9<>6 =>h9=8 solve
18/Apr/18 4:38 AM
Ignoring Basics
#25 5?@b8=>b6=7=>f5=7=>g3=7=>a….i8<>7=>b8<>5
#40 6?@a3=>a2=9=>h1=9=>a….i1<>6=>a3<>6
Basics used (ignoring direct use of Rules)
#38 6@ai35=>dg5<>6=>14@dg5=>i5<>4
#39 8@c79=>c1<>8 8@i23=>h1<>8
18/Apr/18 7:44 AM
Please Log in to post a comment.

Not a member? Joining is quick and free. As a member you get heaps of benefits.

Join Now Login