
(;CA[UTF-8]SZ[19]ST[2]AP[GOWrite:2.3.48]FF[4]GM[1]PW[Dylan Zhu Dong]GN[ ]FG[259:]C[This was the game that decided the 2014 British Youth Championship.]RU[Japanese]KM[0.00]PM[2]PB[Oscar Selby]
;B[pp]
;W[dd]
;B[pc]
;W[dp]
;B[pe]
;W[nq]
;B[lq]
;W[jq]C[Unusual]
;B[np]
;W[pr]
;B[pq]
;W[qq]
;B[qp]
;W[oq]
;B[qr]
;W[mp]
;B[op]
;W[mq]
;B[mo]
;W[lp]
;L[qj]B[mm]C[Too greedy. It leaves White with a wedge at A that has room for a two-space extension either up or down at the side, so Black's area vanishes. .]
(
;L[qj]C[White should indeed play A.]W[dj]
;B[pj]C[Black got away with it.]
;W[ph]C[Invading is no longer best. The easy opportunity has gone, so it is better to play a big move like B, and save the invasion for later.]
(
;PM[2]FG[259:]
;B[qh]C[There is a rule that say don't attach to a stone you want to attack - see var]
;W[qg]
;B[qi]
;W[qe]
;B[pf]
;W[pg]
;B[qf]
;W[rf]
;B[re]
;W[qd]
;B[rg]
;W[pd]
;B[od]
;W[oe]C[This is the sort of thing that happens after a contact move. It get very comples. White will probably end up getting something, and since this was originally white's area, anything white gets is probably good enough.]
;B[of]
;W[oc]
;B[ne]
;W[nd]
;B[oe]
;W[qc]
;B[oh]
;W[nc]
;B[ic]
;PM[2]FG[259:]
;W[cg]
;B[fc]
;W[dc]
;B[lc]
;L[fe][hd]C[This seems a bit odd. I prefer B or C, which expand White's area at the same time as pressing Black down.]W[kd]
;B[kc]
;W[ld]
;B[jd]
;W[je]
;B[ie]
;W[hd]
;B[ke]
;W[jf]
;B[md]
;W[mc]
;B[le]C[Now all Black’s stones are strong. This makes the game difficult for White. Also, there is some bad aji in the top right corner which is explored in Variations 2 & 3.]
(
;W[gc]
;B[fd]
;W[gf]
;B[he]
;W[ge]
;B[gd]
;W[ee]
;B[if]C[Better to jump out.]
;W[jh]
;B[jg]
;W[ig]
;B[kf]
;W[ih]C[Black has been tricked into capturing two worthless stones while White make his centre much bigger.]
;B[kh]
;W[ki]
;B[li]
;W[kj]
;B[lj]
;W[kk]
(
;B[cn]
;PM[2]FG[259:]
;W[co]
;B[cq]
;W[dq]C[Playing at 87 might work out better.]
;B[bo]
;W[dn]
;B[cm]
;W[cp]
;B[bp]
;W[dm]
;B[cl]C[Black seems to have done better than a normal 3-3 invasion.]
;W[ml]
;B[kn]
;W[ln]C[I don't believe this white move should work as well as it did in the game.]
;B[mn]
;W[lm]
;B[lo]
;W[ko]
;B[ll]
;W[km]
;B[kl]
;W[jm]
;B[jl]C[Black should now play at 106. Then, after White plays here, Black can start the sequence in Variation 4, and that should be enough to win.]
;W[lk]
;PM[2]FG[259:]
;B[im]
;W[jn]
;B[ij]
;W[il]
;B[jk]
;W[lh]
;B[mh]
;W[kg]
;B[lg]
;W[kh]
;B[mk]
;W[nl]
;B[nk]
;W[nm]
;B[on]
;W[ik]
;B[jj]
;W[hj]
;B[hk]
;W[hl]
;B[hi]
;W[gj]
;B[ii]
;W[gi]
;B[ol]
;W[hh]
;B[om]
;W[ji]C[Compared to Variation 5, White got more in the centre, just like Black got more than a standard 3-3 invasion in the corner. So, it is still very close.

I think Black now has about 80 + 10 points. White has potential to make more than that, unless Black can push out far enough from the bottom right corner. The aji in the top right corner is not resolved.]
;B[nn]
;W[ll]C[These two moves were small for both players. There are much bigger moves.]
;B[mg]C[Again small. White can get a double-atari, but it only takes away about 5-10 points.]
;W[cj]C[Big!]
;B[dl]
;W[el]
;B[ek]
;W[dk]
;B[cr]
;W[dr]
;B[fq]C[No chance of this living.]
;W[gp]
;B[fp]
;W[fo]C[Again we see a play in close contact with a stone he is attacking. Don't do it!

Why not just make a hanging connection at 155. Black does not have space to live in here.]
;B[em]
;W[fl]
;B[en]
;W[eo]
;B[do]C[So, Black managed to get something.]
;W[ep]
;B[fm]
;W[gm]
;B[gq]
;W[hp]
;B[ir]
;W[hq]
;B[er]
;W[ds]
;B[hr]
;W[jr]
;B[or]
;W[nr]
;B[ps]
;W[rd]
;B[sf]
;W[lb]
;B[kb]
;W[mb]C[Finally the corner is safe. White should win from here by 10 - 20 points.]
;PM[2]FG[259:]
;B[eb]
;W[db]
;B[fe]
;W[ff]
;B[bk]
;W[bj]
;B[ns]
;W[ms]C[White is living dangerously.]
;B[ls]C[Good try by Black to cause an upset.]
;W[kq]
;B[mr]
;W[lr]
;B[js]C[Now White should throw in at 191. That makes a double-ko which keeps Black disconnected.]
;W[ms]
;B[fs]
;W[gr]
;B[mr]
;W[is]
;B[ks]
;W[ms]
;B[fn]C[Not big enough.]
;LB[pb:A]C[Correct. White has escaped the ko scare with only a small loss.

I think the only place where Black had a big enough ko threat was A. There are a few threats for Black there. Would thave have been enough to win the ko? Well, it should never have been a real ko.]W[kr]
;B[gn]
;W[go]
;B[hn]
;W[hm]
;B[io]
;W[in]
;B[ho]
;PM[2]FG[259:]
;W[ec]
;B[aj]
;W[ai]
;B[ak]
;W[bi]
;B[fb]
;W[ka]
;B[ja]
;W[la]
;B[gb]
;W[dn]
;B[da]
;W[do]
;B[dm]
;W[ck]
;B[cb]
;W[cc]
;B[bb]
;W[bl]
;B[bm]
;W[al]C[Neat engame trick in this sort of shape\: hane and make a snapback. In this case it also makes one of Black's eyes false.]
;B[bc]
;W[bd]
;B[ad]
;W[ae]
;B[ac]
;LB[sd:B][pb:C]C[The record ends here with the game still in the balance. Is Black alive in the bottom right? A black hane at B is also very big. (If White blocks directly, Black can pull out at C.)

However, eventually White wins by less than 10 points to become British Youth Go Champion.]W[be]
;L[pb][sd]GOWRITEFG[includePastCount:58]PM[2]FG[259:]
)
(
;B[cq]
;PM[2]FG[259:]
;W[cp]
;B[dq]
;W[eq]
;B[er]
;W[fq]
;B[fr]
;W[gq]
;B[bp]
;W[bo]
;B[bq]
;W[cn]
;B[kn]C[Variation 5\: If Black was very confident about counting then this might be a simple way to play.

The big black territory is about 100 points, and there is 10 in the bottom right.

If Black gets the first move in the middle like this, then White probably cannot secure 110 points, but it is close. Black has the aji in the top right corner to gain more points..

I think most people would play like Black did in the game, but this is worth thinking about.]
;FG[259:]GOWRITEFG[includePastCount:13]PM[2]
)

)
(
;W[tt]
;MN[1]FG[259:]PM[2]
;B[pb]C[What happens if Black moves out with 1?]
;W[ob]
;B[qb]
;W[rd]
(
;B[sf]
;W[rb]C[Variation 3\: If Black answers the atari, White can save the corner.]
;VW[la:sh]GOWRITEFG[includePastCount:6]PM[2]FG[259:]
)
(
;B[rb]
;W[se]
;B[rh]
;W[sc]
;B[rc]
;W[lb]
;B[kb]
;W[pa]
;B[sb]C[Variation 4\: but Black ignores the atari. White cannot make two eyes anywhere, so Black gets a favourable ko to capture the whole corner.]
;VW[ja:sh]GOWRITEFG[includePastCount:13]PM[2]FG[259:]
)

)

)
(
;B[nh]
;W[oi]
;B[mj]
;W[oj]
;B[pk]
;W[og]
;B[mf]C[Variation 2\: Just play a simple cap. Then as the proberb says, follow it with a knight's move. White is going nowhere, while Black makes wonderful thickness in the middle.]
;VW[la:ss]GOWRITEFG[includePastCount:7]PM[2]FG[259:]
)

)
(
;W[qj]C[Variation 1\: White can play here, and then make a 2-space extension in either direction. Black's area vanishes. (Black should probably play on this point.)]
)

)
