Maestro n° 103 : Page 64 - Gr 61
r6c1 =5= r4c3 -5-8- r4c3 =8= r2c3 -8-3- r2c3 =3= r1c1 -3-1- r1c1 =1= r1c6 -1- r2c6 =1= r2c7 -1- r5c7 =1= r5c8 -1-2- r5c8 =2= r6c8 => r6c1 ≠ 2 and r6c8 ≠ 5