Maestro n° 103 : Page 38 - Gr 35
r8c3 =1= r6c3 -1- r5c2 =1= r5c9 -1-2- r5c9 =2= r5c8 -2-5- r5c8 =5= r5c5 -5-9- r5c5 =9= r8c5 => r8c5 ≠ 1 and r8c3 ≠ 9