Don't play unneccessary forcing moves, you need to read out which stones can be saved before you play.
(;AB[jc]AB[kc]AW[kd]AW[jd]AW[id]AW[ic]AW[gd]AW[hd]AW[ge]AB[ib]AB[ld]AB[le]AB[fc]AB[fd]AB[fe]AB[gf]AB[gg]AW[hf]AW[hg]AW[ih]AW[jh]AW[kh]AW[ii]AW[hi]AB[gh]AB[gi]AW[mf]AB[lh]AB[he]AB[ie]AB[je]AB[ke]AW[lc]AW[mc]AW[md]AW[me]AB[lf]AW[mg]AW[lg]AB[li]AB[hk]AB[hj]AB[jg]AB[kg]AB[gk]C[How can White save his stones? Don't play unneccessary forcing moves, you need to read out which stones can be saved before you play.]AW[ij]AB[ik]AB[ji]AB[jj]AB[kk]AB[kj]AP[goproblems]
(;W[jf]
(;B[hc]
(;W[if];B[gc];W[kf]C[Well done! :)RIGHT])
(;W[ig];B[gc];W[kf]C[Well done! :)RIGHT])
(;W[kf];B[if]C[:(]))
(;B[kf];W[if]C[RIGHT])
(;B[if];W[ig]C[RIGHT])
(;B[ig];W[if]C[RIGHT]))
(;W[if];B[hc]
(;W[jf]
(;B[gc];W[kf]C[Well done! :)RIGHT])
(;B[kf];W[ig]C[RIGHT]))
(;W[ig];B[gc]C[:(])
(;W[kf];B[jf]C[:(]))
(;W[ig];B[hc]
(;W[jf]
(;B[gc];W[kf]C[Well done! :)RIGHT])
(;B[kf];W[if]C[RIGHT])
(;B[if];W[kf]C[RIGHT]))
(;W[if];B[gc]C[:(])
(;W[kf];B[jf]C[:(]))
(;W[kf];B[jf]C[:(])
(;W[hb];B[hc]
(;W[jf];B[kf]C[:(])
(;W[if];B[jf]C[:(])
(;W[kf];B[jf]C[:(])
(;W[ig];B[jf]C[:(])
(;W[gc];B[gb]C[:(]))
(;W[jb]C[];B[kb]C[You've played an unneccesary forcing move. These White stones can't increase their liberties to more than 2. Try it out.FORCE]LB[gc:1]LB[hc:2]TR[gd]TR[hd]TR[id]TR[ic]TR[jd]TR[kd]TR[ge]
(;W[hb];B[ja]C[FORCE]
(;W[gb];B[gc]C[FORCE];W[hc];B[fb]LB[ga:1]LB[ha:2])
(;W[gc];B[gb]))
(;W[ia];B[ja]C[FORCE];W[hb];B[ha]C[FORCE];W[gb];B[gc])))