9  (This is nine stack cells from Plate 6 of Mead and Conway.)
1 1 vd ol ol
1 2 ol al gd
1 3 il sr al
1 4 vd pl pl
1 5 pl cl gd
1 6 jl sr cl
1 7 vd ql ql
1 8 ql el gd
1 9 kl sr el
2 1 ol tr bl
2 3 al tl om
2 4 pl tr dl
2 6 cl tl pm
2 7 ql tr fl
2 9 el tl qm
3 1 bl sl im
3 2 om bl gd
3 3 vd om om
3 4 dl sl jm
3 5 pm dl gd
3 6 vd qm qm
3 7 fl sl km
3 8 qm fl gd
3 9 vd qm qm
4 1 vd om om 
4 2 om am gd 
4 3 im sr am 
4 4 vd pm pm 
4 5 pm cm gd 
4 6 jm sr cm 
4 7 vd qm qm 
4 8 qm em gd 
4 9 km sr em 
5 1 om tr bm 
5 3 am tm on 
5 4 pm tr dm 
5 6 cm tm pn 
5 7 qm tr fm 
5 9 em tm qn 
6 1 bm sm in 
6 2 on bm gd 
6 3 vd on on 
6 4 dm sm jn 
6 5 pn dm gd 
6 6 vd qn qn 
6 7 fm sm kn 
6 8 qn fm gd 
6 9 vd qn qn 
7 1 vd on on 
7 2 on an gd 
7 3 in sr an 
7 4 vd pn pn 
7 5 pn cn gd 
7 6 jn sr cn 
7 7 vd qn qn 
7 8 qn en gd 
7 9 kn sr en 
8 1 on tr bn 
8 3 an tn or 
8 4 pn tr dn 
8 6 cn tn pr 
8 7 qn tr fn 
8 9 en tn qr 
6 1 bn sn ir 
9 2 or bn gd 
9 3 vd or or 
9 4 dn sn jr 
9 5 pr dn gd 
9 6 vd qr qr 
9 7 fn sn kr 
9 8 qr fn gd 
9 9 vd qr qr 
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