(;GM[1]FF[4]SZ[21:19]
GN[Preventing squares and forcing more connections]
PC[https://senseis.xmp.net/?TwoSquares]AP[GoWiki:2009]
DT[2020-01-17]
C[Diagram from https://senseis.xmp.net/?TwoSquares

Preventing squares and forcing more connections]
PL[B]

AB[bi][di][gi][ki][li][oi][pi][si][bj][dj][fj][hj][jj][lj][nj][pj][rj][tj][bk][ck][dk][fk][gk][hk][jk][kk][ok][sk]
AW[ci][fi][hi][ji][ni][ri][ti][lk][nk][pk][rk][tk]
CR[ci][fi][hi][ji][ni][ri][ti][lk][nk][pk][rk][tk]
LN[bi:bk][bk:dk][dk:di][di:bi][fi:fk][fk:hk][hk:hi][hi:fi][ji:jk][jk:lk][lk:li][li:ji][ni:nk][nk:pk][pk:pi][pi:ni][ri:rk][rk:tk][tk:ti][ti:ri]


;CR[ci][fi][hi][ji][ni][ri][ti][lk][nk][pk][rk][tk]
LN[bi:bk][bk:dk][dk:di][di:bi][fi:fk][fk:hk][hk:hi][hi:fi][ji:jk][jk:lk][lk:li][li:ji][ni:nk][nk:pk][pk:pi][pi:ni][ri:rk][rk:tk][tk:ti][ti:ri]
)
