(;SZ[19]AW[gn]AW[in]AW[ln]AW[nn]AW[ho]AW[jo]AW[lo]AW[mo]AW[hp]AW[mp]AW[hq]AW[mq]AW[hr]AW[lr]AW[ms]AB[fn]AB[on]AB[eo]AB[go]AB[no]AB[oo]AB[gp]AB[np]AB[gq]AB[jq]AB[nq]AB[er]AB[gr]AB[jr]AB[mr]AB[nr]TR[jq]TR[jr]C[Black to connect the marked stones to the outside, unconditionally.]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]
(;B[lq];W[kq]
(;B[ls];W[ks]
(;B[js];W[gs]
(;B[kr];W[lp]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[fs];W[hs]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[ls];W[fr]C[What if White plays a threat like this?]
(;B[fq];W[ks]C[Play at T (H6) for a small ko threat.]LB[hn:T]
(;B[ns]C[White cannot connect at M1.RIGHT])
(;B[hn];W[ls]C[You did not need a ko threat to connect.]))
(;B[ns]C[The group was safe already, you just wasted a move.])
(;B[ks]C[The group was safe already, you just wasted a move.])
(;B[lq]C[The group was safe already, you just wasted a move.])
(;B[jp];W[es]C[Not big enough.])
(;B[kp];W[lq]
(;B[fq];W[ks]C[Ko])
(;B[ns];W[es]C[The group was safe already, you just wasted a move.])))))
(;B[fs];W[hs];B[kr];W[lp]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[ls];W[fr]C[What if White plays a threat like this?]
(;B[fq];W[ks]C[Play at T (H6) for a small ko threat.]LB[hn:T]
(;B[ns]C[White cannot connect at M1.RIGHT])
(;B[hn];W[ls]C[You did not need a ko threat to connect.]))
(;B[ns]C[The group was safe already, you just wasted a move.])
(;B[ks]C[The group was safe already, you just wasted a move.])
(;B[lq]C[The group was safe already, you just wasted a move.])
(;B[jp];W[es]C[Not big enough.])
(;B[kp];W[lq]
(;B[fq];W[ks]C[Ko])
(;B[ns];W[es]C[The group was safe already, you just wasted a move.]))))
(;B[ns];W[kr]))
(;B[kr];W[lp]
(;B[js];W[hs]
(;B[ns]C[RIGHT])
(;B[ls];W[gs]C[What if White plays a reasonable threat, like G1?]
(;B[fs];W[ks]LB[hn:T]C[Play at T (H6) if you think you need a threat. The threat is not very big.]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[jp];W[ls])
(;B[kp];W[lq]C[Just ko])
(;B[hn];W[ls]C[You did not need a threat to connect. Now it's too late.]))
(;B[ns]C[The group was safe already, you just wasted a move.])
(;B[ks]C[The group was safe already, you just wasted a move.])
(;B[jp];W[es]C[Not big enough; F1 would have been at least 4 points worth.])
(;B[lq]C[The group was safe already, you just wasted a move.]))
(;B[kp];W[lq]C[Only ko]))
(;B[hs];W[is]
(;B[js];W[jp];B[ns];W[ir];B[ls];W[iq]C[Only ko])
(;B[gs];W[ls])
(;B[ir];W[jp];B[js];W[iq]C[Ko])
(;B[ns];W[ir]
(;B[js];W[jp];B[ls];W[iq]C[Only ko])
(;B[ls];W[js]C[Ko]))))
(;B[hs];W[is]
(;B[kr];W[lp]
(;B[js];W[jp];B[ns];W[ir];B[ls];W[iq]C[Only ko])
(;B[gs];W[ls])
(;B[ir];W[jp];B[js];W[iq]C[Ko])
(;B[ns];W[ir]
(;B[js];W[jp])
(;B[ls];W[js]C[Ko])))
(;B[js];W[ir];B[kr];W[lp]
(;B[ls])
(;B[ns];W[jp]))
(;B[ir];W[gs];B[kr];W[lp];B[js];W[jp];B[hs];W[iq];B[ls]C[Ko])))
(;B[kr];W[lp]
(;B[js];W[gs]
(;B[ls];W[ks]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[fs];W[hs]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[ls];W[fr]C[What if White plays a threat like this?]
(;B[fq];W[ks]C[Play at T (H6) for a small ko threat.]LB[hn:T]
(;B[ns]C[White cannot connect at M1.RIGHT])
(;B[hn];W[ls]C[You did not need a ko threat to connect.]))
(;B[ns]C[The group was safe already, you just wasted a move.])
(;B[ks]C[The group was safe already, you just wasted a move.])
(;B[lq]C[The group was safe already, you just wasted a move.])
(;B[jp];W[es]C[Not big enough.])
(;B[kp];W[lq]
(;B[fq];W[ks]C[Ko])
(;B[ns];W[es]C[The group was safe already, you just wasted a move.])))))
(;B[fs];W[hs];B[ls];W[ks]LB[hn:T]C[Play at T (H6) if you think you need a threat. The threat is not very big.]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[jp];W[ls])
(;B[kp];W[lq]C[Just ko])
(;B[hn];W[ls]C[You did not need a threat to connect. Now it's too late.])))
(;B[ls];W[ks]
(;B[js];W[hs]
(;B[ns]C[RIGHT])
(;B[ls];W[gs]C[What if White plays a reasonable threat, like G1?]
(;B[fs];W[ks]LB[hn:T]C[Play at T (H6) if you think you need a threat. The threat is not very big.]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[jp];W[ls])
(;B[kp];W[lq]C[Just ko])
(;B[hn];W[ls]C[You did not need a threat to connect. Now it's too late.]))
(;B[ns]C[The group was safe already, you just wasted a move.])
(;B[ks]C[The group was safe already, you just wasted a move.])
(;B[jp];W[es]C[Not big enough; F1 would have been at least 4 points worth.])
(;B[lq]C[The group was safe already, you just wasted a move.]))
(;B[kp];W[lq]C[Only ko]))
(;B[hs];W[is]
(;B[js];W[jp];B[ns];W[ir];B[ls];W[iq]C[Only ko])
(;B[gs];W[ls])
(;B[ir];W[jp];B[js];W[iq]C[Ko])
(;B[ns];W[ir]
(;B[js];W[jp])
(;B[ls];W[js]C[Ko])))))
(;B[js];W[gs]
(;B[ls];W[ks]
(;B[kr];W[lp]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[fs];W[hs]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[ls];W[fr]C[What if White plays a threat like this?]
(;B[fq];W[ks]C[Play at T (H6) for a small ko threat.]LB[hn:T]
(;B[ns]C[White cannot connect at M1.RIGHT])
(;B[hn];W[ls]C[You did not need a ko threat to connect.]))
(;B[ns]C[The group was safe already, you just wasted a move.])
(;B[ks]C[The group was safe already, you just wasted a move.])
(;B[lq]C[The group was safe already, you just wasted a move.])
(;B[jp];W[es]C[Not big enough.])
(;B[kp];W[lq]
(;B[fq];W[ks]C[Ko])
(;B[ns];W[es]C[The group was safe already, you just wasted a move.])))))
(;B[fs];W[hs];B[kr];W[lp])
(;B[ns];W[kr]))
(;B[fs];W[hs]
(;B[ls];W[ks];B[kr];W[lp])
(;B[kr];W[lp];B[ls]))
(;B[kr];W[lp]
(;B[ls];W[ks]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[fs]))
(;B[fs];W[hs];B[ls])))
(;B[hs];W[is];B[js];W[ir]
(;B[kr];W[lp];B[ls];W[ks];B[ns];W[jp])
(;B[ls];W[ks];B[kr];W[lp]
(;B[ls])
(;B[ns]))))
(;B[js];W[gs]
(;B[lq];W[kq]
(;B[ls];W[ks];B[fs]C[RIGHT])
(;B[kr];W[lp]))
(;B[kr];W[lq];B[ls];W[ks]C[Only ko.])
(;B[ls];W[ks]
(;B[kr];W[lq];B[ls]C[Only ko.])
(;B[lq];W[kq]
(;B[kr];W[lp]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[fs];W[hs]
(;B[ns]C[White cannot play M1 and Black is connected.RIGHT])
(;B[ls];W[fr]C[What if White plays a threat like this?]
(;B[fq];W[ks]C[Play at T (H6) for a small ko threat.]LB[hn:T]
(;B[ns]C[White cannot connect at M1.RIGHT])
(;B[hn];W[ls]C[You did not need a ko threat to connect.]))
(;B[ns]C[The group was safe already, you just wasted a move.])
(;B[ks]C[The group was safe already, you just wasted a move.])
(;B[lq]C[The group was safe already, you just wasted a move.])
(;B[jp];W[es]C[Not big enough.])
(;B[kp];W[lq]
(;B[fq];W[ks]C[Ko])
(;B[ns];W[es]C[The group was safe already, you just wasted a move.])))))
(;B[fs];W[hs];B[kr];W[lp])
(;B[ns];W[kr]))
(;B[fs];W[hs]
(;B[kr];W[lq];B[ls]C[Only ko.])
(;B[lq];W[kq];B[kr];W[lp])))
(;B[fs];W[hs]
(;B[lq];W[kq]
(;B[ls];W[ks])
(;B[kr];W[lp]))
(;B[ls];W[ks]
(;B[kr];W[lq];B[ls]C[Only ko.])
(;B[lq];W[kq])))
(;B[hs];W[is]
(;B[lq];W[kq]
(;B[ls];W[ks]
(;B[kr];W[lp]
(;B[ns]C[RIGHT])
(;B[ls]C[RIGHT]))
(;B[ns];W[kr]))
(;B[kr];W[lp];B[ls];W[ks];B[ns]C[RIGHT])
(;B[ns];W[ls]))
(;B[kr];W[lq];B[ls];W[ks]C[Ko])
(;B[ls];W[ks];B[kr];W[lq]C[Ko])))
(;B[ls];W[ks]
(;B[lq];W[js]
(;B[kr];W[is];B[ls]C[Only ko.])
(;B[is];W[hs];B[ir];W[kq];B[kr];W[lp];B[ns];W[jp];B[ls];W[ks];B[lq]C[A difficult ko for White to win, admittedly, but still not unconditional.]))
(;B[js];W[gs]
(;B[kr];W[lq];B[ls]C[Only ko.])
(;B[lq];W[kq])
(;B[fs];W[hs]
(;B[kr];W[lq];B[ls]C[Only ko.])
(;B[lq];W[kq])))
(;B[hs];W[is];B[js];W[ir]
(;B[lq];W[kq];B[kr];W[lp]
(;B[ls])
(;B[ns]))
(;B[kr];W[lq]C[Only ko.])))
(;B[hs];W[is]C[Give up now. The best from this is ko.]
(;B[ir];W[gs];B[js]
(;W[ls]C[Only ko.CHOICE])
(;W[lq]C[Only ko.CHOICE])
(;W[hs]
(;B[lq];W[kq];B[kr];W[lp];B[ls];W[ks];B[ns];W[jp];B[ls];W[iq]C[Only ko.])
(;B[ls];W[ks];B[lq];W[kq];B[kr];W[lp];B[ns];W[jp];B[ls];W[iq]C[Only ko.])))
(;B[js];W[ir]
(;B[lq];W[kq]
(;B[kr];W[lp];B[ls];W[ks];B[ns])
(;B[ls];W[ks]))
(;B[ls];W[ks]
(;B[lq];W[kq])
(;B[kr];W[lq]C[Only ko.])))))