(;GM[1]FF[4]SZ[31:19]
GN[Prevent the rectangle with two stones on the frame]
PC[https://senseis.xmp.net/?TwoSquares]AP[GoWiki:2009]
DT[2021-06-14]
C[Diagram from https://senseis.xmp.net/?TwoSquares

Prevent the rectangle with two stones on the frame]
PL[B]

AB[bg][dg][eg][hg][jg][kg][ng][pg][qg][tg][ug][vg][wg][zg][{g][|g][}g][bh][eh][hh][kh][nh][qh][}h][bi][di][ei][hi][ii][ki][ni][oi][pi][ti][ui][vi][wi][zi][{i][}i][dk][ek][jk][kk][pk][qk][uk][vk][wk][{k][|k][}k][cl][el][il][kl][ol][ql][ul][{l][}l][dm][em][im][km][om][pm][um][vm][wm][{m][}m]
AW[cg][ig][og][th][wh][zh][ci][ji][qi][|i][ck][ik][ok][wl][cm][jm][qm][|m]
CR[ck][ok][wl][cm][jm][qm][|m]


;CR[ck][ok][wl][cm][jm][qm][|m]
)
