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SIMPLE COLORS
numero 2 è possibile cancellarlo dalle celle rosse
* color1 r5c3,r6c6,
* color2 r6c2,r5c5,r2c3,
* deleted 2 from r2c6 ,

SIMPLE COLORS, numero 7 è possibile cancellarlo dalle celle rosse
* color1 r4c8,r8c7,
* color2 r5c7,r4c6,
* deleted 7 from r8c6 ,

X-COLORS
* color1 r7c5,
* color2 r7c8,r8c6,r2c7,r3c5,
* deleted number 6 from r2c5,

X-COLORS
* color1 r4c6,r6c2,r5c7,
* color2 r4c8,r8c7,r9c5,r3c4,r6c6,r5c1,r1c2,
* deleted number 7 from r5c5, r3c6, r3c2,

LOOP, contradiction found, r7c5
* If r7c5=4 then
* r7c5 <> 6
* r3c5 = 6
* r3c5 <> 5
* r3c1 = 5
* r5c1 = 7
* r6c2 <> 7
* r1c2 = 7
* r1c2 <> 4
* r1c5 = 4
* r7c5<>4
* CONTRADICTING THE HYPOTESHIS
* deleting 4 from r7c5


Hanno risolto:
Bruno61