Tried 13x13 with lvl 8, and was crashed
Switched back to lvl 5, had to fight with a ko win
(;GM[1]FF[4]PB[COSUMI(Level 5)]PW[You]SZ[13]KM[6.5]RE[W+13.5]
;B[kc];W[dj];B[dk];W[ck];B[dc];W[jk];B[ki];W[kj];B[ek];W[cj]
;B[jj];W[ij];B[ji];W[kk];B[hl];W[hk];B[il];W[ik];B[gl];W[cl]
;B[fi];W[hh];B[kf];W[de];B[dh];W[ei];B[gh];W[eh];B[fj];W[ig]
;B[jh];W[ih];B[eg];W[fg];B[gg];W[ff];B[li];W[lj];B[gf];W[ie]
;B[ge];W[jf];B[le];W[ic];B[gc];W[cc];B[dd];W[cd];B[ce];W[cf]
;B[ee];W[be];B[je];W[jd];B[kd];W[ef];B[ke];W[ll];B[mk];W[hc]
;B[jg];W[gb];B[if];W[hf];B[gd];W[fb];B[jf];W[gk];B[fk];W[he]
;B[hg];W[hi];B[gi];W[jl];B[mj];W[dl];B[ml];W[el];B[fl];W[km]
;B[db];W[fe];B[fc];W[cb];B[eb];W[ed];B[fa];W[hb];B[ec];W[jb]
;B[ia];W[kb];B[lb];W[la];B[lc];W[im];B[ca];W[ba];B[da];W[bb]
;B[ii];W[hj];B[hd];W[id];B[fm];W[hm];B[ha];W[ga];B[ka];W[ja]
;B[mb];W[em];B[ma];W[ej];B[ka];W[fh];B[la];W[fd];B[jc];W[ib]
;B[ia];W[ea];B[lk];W[gj];B[fa];W[mi];B[ha];W[mm];B[mh];W[mj]
;B[gm];W[jm];B[];W[])