(
;
FileFormat[1]GaMe[1]
VieW[]
SiZe[19]
PlayerBlack[Robin Upton]
BlackRank[1 Dan]
PlayerWhite[Alan Thornton]
WhiteRank[2 Dan]
EVent[Coventry Go Tournament]
ROund[1]
DaTe[24/3/97]
PlaCe[Tile Hill, Coventry]
TiMe[55 minutes + 5 minutes/20 stones]
REsult[B+Resign½]
SOurce[BS]
USer[BS]
KoMi[5½]
;
Black[dp]
;
Black[pd]
;
White[do]
;
Black[pp]
;
White[ec]
;
Black[pj]
;
White[nc]
;
Black[pf]
;
White[jd]
;
Black[cj]
;
White[cl]
;
Black[cg]
;
White[jp]
;
Comment[Black had used 10 minutes up to this point, white only 2.]
Black[cd]
;
White[ee]
;
Black[eq]
;
White[cq]
;
Black[hp]
;
White[hq]
;
Black[gq]
;
White[iq]
;
Black[cr]
;
White[br]
;
Comment[This is probably a mistake, since it makes these stones harder to sacrifice. A move around N3 might have been a wiser choice.]
Black[dr]
;
White[nq]
;
Comment[Black had used 20 minutes up to this point, white only 5.]
Black[np]
;
Comment[Strange.]
White[mq]
;
Black[oq]
;
White[gr]
;
Black[fp]
;
White[fr]
;
Black[mp]
;
Comment[A good exchange for black, since the increased influence on the right hand side fits perfectly with the high position he has built up. White's lower side, by contrast appears overconcentrated. ]
White[lq]
;
Black[gm]
;
White[em]
;
Comment[Seems to gain little for black; white is hardly likely to take this point.]
Black[lp]
;
White[kp]
;
Black[nr]
(
;
White[qn]
;
Black[ql]
;
White[pb]
(
;
Black[kn]
;
White[jn]
;
Black[jm]
;
White[km]
Comment[A vital point in the game.]
(
;
Black[jo]
;
White[ko]
;
Black[in]
;
White[ln]
;
Black[jn]
;
White[lo]
;
Black[lm]
;
White[kl]
;
Black[ll]
;
White[lk]
;
Black[kk]
;
White[jl]
;
Black[mk]
;
White[lj]
;
Black[ik]
;
White[jk]
;
Black[jj]
;
White[kj]
;
Black[il]
;
White[kk]
;
Comment[Black had used 48 minutes up to this point, white 21.]
Black[nm]
;
White[ji]
;
Black[ij]
;
White[kh]
;
Black[md]
;
White[nd]
;
Black[mf]
;
White[qc]
(
;
Black[jf]
Comment[Probably bad; black is getting overinterested in the attack, I think. K14 serves little purpose except for attack.]
;
White[ni]
;
Black[nj]
;
White[mj]
;
Black[nk]
;
White[ng]
;
Black[mh]
;
White[mg]
;
Black[lg]
;
White[lh]
;
Black[nf]
;
White[og]
;
Black[mc]
Comment[Overplay.]
;
White[of]
;
Black[oe]
;
White[ne]
;
Black[pg]
;
White[me]
;
Black[lf]
;
White[le]
;
Black[oh]
;
White[nh]
;
Black[oi]
;
White[mi]
;
Black[jg]
;
White[ih]
;
Black[id]
;
White[ic]
;
Black[fd]
;
White[ed]
;
Black[hc]
;
White[jc]
;
Black[hg]
;
White[eg]
;
Black[kd]
;
White[ke]
;
Black[je]
;
White[kc]
;
Black[hh]
;
White[ig]
;
Black[if]
;
White[jh]
;
Black[he]
;
White[gf]
;
Black[ff]
;
White[fe]
;
Black[ge]
;
White[gg]
;
Black[hf]
;
White[fg]
;
Black[df]
;
White[ef]
;
Black[fc]
;
White[fb]
;
Black[gb]
;
White[cc]
;
Black[bc]
;
White[bb]
;
Black[cb]
;
White[dc]
;
Black[bd]
;
White[ab]
;
Black[lr]
;
White[kq]
;
Black[mr]
;
White[qe]
;
Black[jr]
;
White[kr]
;
Black[ks]
;
White[ir]
;
Black[ls]
;
White[hs]
;
Black[is]
Comment[J1 is a move played in haste.
In fact, white is not in danger 
here.]
;
White[js]
;
Black[eb]
;
White[db]
;
Black[is]
;
White[or]
Comment[This does not look like a good threat; white should instead play q2 to force P2, leaving r3 aji etc in the corner.]
;
Black[pr]
;
White[js]
;
Black[qd]
;
White[rd]
;
Black[is]
;
White[mm]
;
Black[ml]
;
White[js]
;
Black[re]
;
White[rf]
;
Black[is]
;
White[oo]
;
Black[op]
;
White[js]
;
Black[se]
;
White[sd]
;
Black[is]
;
White[fq]
;
Black[eo]
;
White[gp]
;
Black[go]
;
White[rh]
;
Black[pc]
;
White[sf]
;
Black[qb]
;
White[pe]
;
Black[ob]
;
White[oc]
;
Black[rc]
;
White[od]
;
Comment[The damage to black's right hand side is very great, so even after black capturing the corner, the game is not yet over, although black may be slightly ahead still.

N18 is very large and is black's sente, so white should probably play o18 to remove this weakness immediately. 

Black eventually went on to win, although not without incident - i.e. he swapped off some central stones to secure a small life in the lower left corner, and fought a 50 point ko for life of the upper left hand side group. White failed to capitalise on the chances he was given, however.

 ]
Black[pa]
)
(
;
Black[ne]
Comment[White's r14 takes territory and strengthens his stones; it seems prudent for black to strengthen his stones in response.]
;
White[mj]
Comment[I think white should take this exchange in sente.]
;
Black[nk]
;
White[jf]
Comment[Black does not need to fear white's grabbing k14.]
;
Black[mc]
Comment[White's top is ruined, and black's group is strong.]
)
)
(
;
Black[ln]
Comment[This looks like a strong move for black, although he never considered. Unless white can capture black's lower left stones, he faces great problems, since black's right side moyo is too large.]
)
(
;
Black[jo]
Comment[This was the other move black was considering.]
;
White[in]
;
Black[ko]
)
)
(
;
Comment[Whit no doubt intended this exchange, to lessen the danger of a black invasion at M17.]
Black[qc]
;
White[oo]
;
Black[op]
;
Comment[Black was reluctant to see white break out into the centre ih such style. \(Note that the corner has bad aji associated with it, so the potential of a black diaster is a real one\). For this reason, he ignored white's move in the top right.]
White[ln]
)
)
(
;
White[mr]
Comment[Black's idea was simply to get this exchange in sente to defend against white's r3 invasion.]
;
Black[kn]
Comment[This was in black's mind when he played O2. The plan was to sacrifice some of the marked stones if necessary and concentrate on building up a big right hand side territory.]
Mark[cr][dr][eq][fp][gq][hp]
)
)
