Problem	12496
Created	2009-03-25
Source	The night
Rating

Difficulty	10.2 kyu
Average Solve Time	43 secs
User Attempts	1189 / 3107
Solve Ratio Rating	6 kyu
	rating history

Which jump is impossible to cut in the middle of an empty board?

O - One-space jump
K - Knight's move (small)
T - Two-space jump
L - Large knight's move

(;LB[gg:O]LB[ig:K]LB[kg:T]LB[mg:L]AP[goproblems] (;B[gg];W[as]LB[gi:J]C[Jump!FORCE];B[gi];W[gh]C[Stay connected] (;B[hh];W[fh] (;B[hi];W[hg];B[sa]) (;B[hg];W[hi]) (;B[fi];W[eh] (;B[hi];W[hg]) (;B[hg];W[hi])) (;B[fg];W[eh] (;B[hg];W[hi]) (;B[hi];W[hg]))) (;B[fh];W[hh] (;B[fg];W[fi]) (;B[fi];W[fg]) (;B[hg];W[ih] (;B[fg];W[fi]) (;B[fi];W[fg])) (;B[hi];W[ih] (;B[fi];W[fg]) (;B[fg];W[fi])) (;B[eh];W[fg];B[ff];W[eg];B[dg];W[fi]C[Horrible for white, but still cut.]))) (;B[ig];W[as]LB[ji:J]C[Jump!FORCE];B[ji];W[jh]C[Stay connected] (;B[ih];W[ii];B[kh];W[jg];B[jf]C[Yup! The keima is the only jump that can stay connected.RIGHT]) (;B[ii];W[ih];B[hh];W[jg] (;B[if];W[hi]) (;B[hg];W[hi]) (;B[hi];W[hg]) (;B[jf];W[lg] (;B[hg];W[hi]) (;B[hi];W[hg])))) (;B[kg];W[as]LB[kj:J]C[Jump!FORCE];B[kj];W[kh]C[Stay connected] (;B[lh];W[jh] (;B[li];W[lg]) (;B[lg];W[li] (;B[lj];W[mi]) (;B[ki];W[mi]))) (;B[jh];W[lh] (;B[jg];W[ji] (;B[ki];W[ii]) (;B[jj];W[ii])) (;B[ji];W[jg]))) (;B[mg];W[as]LB[lj:J]C[Jump!FORCE];B[lj];W[mh]C[Stay connected] (;B[lh];W[lg] (;B[kh];W[lf];B[ng];W[mi];B[nj];W[oh]AB[ss]AB[sa]AB[aa]) (;B[ng];W[mi];B[kh];W[lf];B[nj];W[oh]AB[ss]AB[sa]AB[aa]) (;B[mi];W[nh] (;B[kh];W[mf]) (;B[ng];W[oh]) (;B[ni];W[oh])) (;B[mf];W[kg]) (;B[lf];W[kg] (;B[mi];W[nh]) (;B[nh];W[mi]))) (;B[lg];W[lh]) (;B[mi];W[lh];B[nh];W[ng])))