(;GM[1]BS[0]WS[0]BL[1800.0]WL[1800.0]SZ[19]DT[2002-05-03]C[British Go Journal 126.Double Extensions - Part OneAs the first 5 diagrams are relatively simple, I've only included diagrams 6 to 13.Each diagram has it's own variation, except that the main line is Diagram 6. Hopefully most viewers will accept this as valid SGF.]FF[3]AE[dc][dd][de][ed][fd][fc][gc][hc][ic][jc][kc][lc][mc][nc][oc][pc][qc][rc][rd][qd](;AB[pd][pf][dd][df][cj]AW[nc][jc][fc]PL[W]C[Diagram 6 starts here.];W[pb];B[tt];W[fe];B[me];W[ld];B[ec];W[fb];B[tt];W[kf];B[ff];W[gf];B[fg])(;AB[dd][df][dj][pd][pf][pj]AW[jc][fc][nc]PL[W]C[Diagram 7 starts here.];W[fe];B[ec];W[fb];B[ff];W[gf];B[fg];W[tt];B[nd];W[md];B[oc];W[ne];B[od];W[mc])(;AB[pd][pf][dd][cf]AW[jc][nc][fc]PL[B]C[Diagram 8 starts here.];B[lc];W[lb];B[kb];W[kc];B[mb];W[ld];B[mc];W[md];B[nd];W[nb];B[la];W[pc];B[od];W[qc];B[oc];W[ob];B[jb];W[ic];B[ib];W[hc];B[rd];W[rc];B[ke];W[kd];B[mf];W[kf];B[kg];W[jf];B[jg])(;AB[dd][cf][pd][qf]AW[jc][nc][fc]PL[W]C[Diagram 9 starts here.];W[pb];B[qc];W[ld];B[db];W[qh];B[pk];W[oh];B[qb])(;AB[dd][df][cj][pj][pd][pf]C[Diagram 10 starts here.]AW[fc][jc][nc]PL[W];W[fe];B[ec];W[fb];B[nd];W[qh];B[rf];W[md];B[mc];W[od];B[ne];W[oc];B[ld];W[oe];B[of];W[me];B[nf];W[mb];B[lc];W[lb];B[lf];W[pi];B[qj];W[mg];B[mf];W[mi])(;AB[dd][df][dj][pd][pf][qj]AW[fc][jc][nc]PL[W]C[Diagram 11 starts here.];W[qc];B[pc];W[pb];B[qd];W[rb];B[rc];W[qb];B[hc];W[cc];B[dc];W[db];B[cd];W[bb];B[bc];W[cb];B[he];W[ne])(;AB[dd][hc][pd]C[Diagram 12 and Diagram 13 start here.]AW[fc][jc][nc];B[lc];W[lb];B[mb];W[mc];B[kb];W[ld];B[kc];W[kd];B[jb];W[jd];B[pb];W[cf];B[fd];W[cc];B[gc];W[cd];B[ne];W[qc];B[pc];W[qg];B[qe];W[pj]))