size 9

initial:
(0,0)=8
(0,4)=3
(1,3)=6
(1,8)=7
(2,1)=6
(3,6)=2
(4,4)=8
(5,7)=9
(7,5)=3
(8,3)=9

constraints:
(0,0)>(0,1)
(0,2)<(0,3)
(0,6)<(0,7)

(1,0)<(1,1)
(1,3)>(1,4)
(1,6)>(1,7)
(1,7)<(1,8)

(2,0)>(2,1)
(2,3)>(2,4)
(2,6)>(2,7)

(3,0)<(3,1)
(3,3)<(3,4)
(3,5)>(3,6)

(4,0)>(4,1)
(4,2)<(4,3)
(4,4)>(4,5)
(4,6)>(4,7)

(5,0)<(5,1)
(5,2)>(5,3)
(5,5)<(5,6)

(6,0)<(6,1)
(6,3)<(6,4)
(6,6)<(6,7)

(7,0)>(7,1)
(7,3)<(7,4)

(8,1)<(8,2)
(8,6)<(8,7)