Problem	15897
Created	2012-03-06
Source	Adapted from the game
Rating

Difficulty	21.5 kyu
Average Solve Time	35 secs
User Attempts	2084 / 3533
Solve Ratio Rating	12 kyu
	rating history

Assume that the upper side would be of no help to white in this situation.

(;SZ[13]AB[am]AB[aj]AB[bg]AB[ch]AB[ci]AB[dh]AB[eh]AB[ei]AB[ek]AB[fk]AB[fj]AB[gj]AB[hj]AB[jj]AB[jk]AB[ki]AW[ak]AW[bl]AW[cm]AW[bj]AW[bi]AW[bh]AW[cj]AW[ck]AW[cl]AW[dm]AW[dl]AW[dk]AW[dj]AW[di]AW[el]AW[fl]AW[hk]AW[fi]AW[im]AW[ij]AW[gk]AW[hl]AW[kj]AW[kk]MA[ij]C[White just played the marked stone. Help black to secure its border.]AW[ej]AP[goproblems] (;B[ii];W[ik]C[That's it! now it will be easy to protect from various threats.RIGHT]) (;B[ik];W[ii] (;B[hi];W[hh]C[White captures =(]) (;B[ji];W[hi]C[White captures =(]) (;B[gi];W[ji]C[White will capture the shape in the bottom corner =(])))