Maestro n° 103 : Page 38 - Gr 35
r3c6 =7= r3c1 -7- r2c3 =7=9= r2c3 -9- r9c3 =9=8= r9c3 -8- r8c3 =8=1= r8c3 -1- r8c6 =1= r7c6 -1-7- r7c6 =7= r7c4 => r2c4 et r7c6 ≠ 7