(;
GM[1]FF[4]VW[]AP[Many Faces of Go:11.0]
SZ[19]
HA[0]
ST[1]
PB[Meijin Rin Kaiho]
PW[Honinbo Ishida Shuho]
DT[1973-05-08/09]
KM[4.5]
RU[Japanese]
RE[W+R]
SO[Go Review Autumn 1973]
AN[Comments by Ishida Honinbo]
US[SGF created using Many Faces of Go 11]
EV[Honinbo Final Match]
CP[American Go Association]
BR[9 Dan]
WR[9 Dan]
RO[One]
C[1973 Honinbo Final Match
Round 1
W: Honinbo Ishida Shuho, 9P
B: Meijin Rin Kaiho, 9P
Comments by Ishida Honinbo
Originally published in Go Review Autumn 1973
This edition published in the 01/06/03 American Go E-Journal.
Edited by Bill Cobb & Chris Garlock in Many Faces of Go 11.

This is the first game in the 1973 Honinbo Final in which Ishida
defended his title against Rin Kaiho with four straight wins.]
;B[pd];W[cq]
C[W2: Playing on the 3-3 point appears a lot recently (1973) as
it leads to many variations, but this is probably the first time
the large avalance joseki (in the upper left) has been played
in conjunction with the 3-3 play. The avalance joseki is very
common in games between Ishida and Rin.]
;B[pq];W[dc];B[de];W[ce];B[dd];W[cd]
;B[ec];W[cf];B[df];W[dg];B[cc];W[db];B[bc];W[cb];B[cg];W[ch]
;B[bb];W[eb];B[bg];W[bf];B[bh];W[bd];B[ci];W[eg];B[fe];W[fc]
;B[ff];W[ei];B[cl];W[gh];B[id]
C[B33: If Black plays 33 at J15, White plays at J17, and Black
then jumps to L15.]
;W[hf];B[he];W[if];B[gb]
(;W[ke]
C[W38: It is better to exchange White G17 for Black H18 before
playing at 38. See the variation.]
;B[kd]
(;W[gc]
C[W40: See the variation for what happens if White uses 40 to hane
at M16. The variations show that W40 is necessary, so ...]
;B[le]
C[...Black gets to play 41. This variation of the large avalance
joseki leaves Black better than White. Rin commented later that
he didn't have any special plan when he started the avalanche
joseki with 7 (D16) and 9 (E17). It was just a matter of waiting
to see if the turn of W16 (C18) would be to the inside or the
outside.]
;W[hc]
C[W42: Rin commented that this play is absolutely necessary, but
....]
;B[gf];W[kf];B[ld]
C[B45: ... Black gets to make this connection and become thicker.]
;W[cn];B[el];W[dk]
;B[ck];W[ih]
C[W50: Rin commented that if White fails to make shape with this
play, Black will attack at this point with telling effect.]
;B[qo];W[kq];B[mq];W[hp]
(;B[qe]
C[B55: Black could have played the knight's move to N13 here instead
of the diagonal extension. See the variation.

Rin said he was hesitant to make this play because he had to
choose between it, the block at J17 and the extension to Q10.
He settled on 55 because it protected the corner from a 3-3 invasion.]
;W[kb]
(;B[pj]
C[B57: Again, the knight's move to N13 would have been better here.
White would split the right side at R10, Black would block at
R8, and White would jump out to P10. For White to extend along
the side to R13 instead of this jump seems a little dangerous.

Rin agreed that this move should have been the knight's move
at N13. See the variation for how he would have played.]
;W[mg]
C[W58: Once White has played 58, Black's next move is rather difficult.
A white knight's move at N17 or one space jump to N18 are bothunpalatable
for Black.]
;B[do]
C[B59: This shoulder hit is a good move.]
;W[dn];B[fo]
(;W[fq]
C[W62: See variation.]
;B[ek]
C[W63: This is more aggressive than a simple connection at D8.]

(;W[fn]
C[W64: See the variation for a better way for White.]
;B[ho]
C[B65 is a very light move.]
;W[ip];B[eq]
C[B67 is a useful move also.

White cannot resist B67 with a hane at E2 because Black will
cross-cut at F2. White would give atari at E4, and Black would
play a counter-atari at G3. White takes at D3, and Black would
then connect at G4, leaving White in dire straits.

W68 was the sealed move, and Rin was so intrigued by where Ishida
would play that he lay awake that night thinking about it.]
;W[dm]
C[W68: Rin said this move was unexpected.]

(;B[dq]
C[B69: See the variation for why Black cannot connect immediately
at D8.]

(;W[cp]
C[W70: Rin said this move was absolutely necessary after B69 (at
D3). See the variation.]
;B[dl]
(;W[go]
C[W72: See the variation for a white descent at C2 in place of
this wedge.

Once White decides to play 72, the sequence up to 80 is a one-way
street.]
;B[gn];W[ep];B[en];W[eo];B[fm]
(;W[fp]
C[W78: See the variation for why White cannot connect at G4.]
;B[gp];W[gq]
C[W80: Now the white territory has become firmly secured, and it
is hard to say which is better, this or the variation shown for
W62.

Rin commented that White now appears to have more territory but
Black has two ponnuki (the strong shapes resulting from capturing
a stone at F6 and at G5) and it is easier for him to play on.]
;B[mc]
C[B81: This diagonal extension puts cash in the bank, preventing
White 8.]
;W[qc];B[pc];W[ql];B[qj];W[pb]
C[W86 and W82 (at R17) are probes to establish potential in the
corner leaving the diagonal extension of White S16 for later.]

;B[ob];W[qn]
(;B[pn]
C[B89: See the variation for a black extension to Q5.]
;W[ro]
C[W90 and W88 (at R6) are a light way of settling. If White plays
90 at Q7, it leads to ko, and Black has lots of ko threats in
the upper left corner courtesy of the large avalance joseki.]
;B[rn]
C[B91 and B89 (at Q6) are unavoidable.]
;W[qm];B[rp];W[po];B[qp];W[on]
C[W96: Rin commented that the result up to W96 in the lower right
corner is what one might expect to happen.]

(;B[mh]
C[B97 is a superb move. See the variation.

Rin noted that B97 at O13 would produce the exchange of White
97 for Black O12. Black's right side would be larger, but White's
center would also have increased in size, so Rin decided to play
97.]
;W[ng];B[lh];W[lg];B[kh]
C[B101: Rin noted that this extension makes White thinner in the
center.]
;W[oi]
C[W102: It's not yet worth White's while to merely live in the
center, so he counterattacks with 102.]

(;B[ol]
C[B103: See the variation for an alternative for Black.]
;W[oj];B[ok];W[mj];B[ml]
C[B107 enlarges Black's territory in this area.]
;W[kj];B[pm]
C[B109: Rin noted that the territorial exchange up through B109
leaves Black better off.]
;W[qh]
C[W110 is a bad move. If White had lost the game, this would have
been the losing move. R13 is a much better point, which would
promise the diagonal extension at S16 in the corner so Black
would probably capture at R18. Then White S11 becomes a sente
endgame play.]
;B[rf]
;W[rg];B[ri]
C[B113: After W110 (at R12), Black was able to play 111 (at S14)
and 113, which are very large. W110 at R13 would have been much
better for White.]

(;W[mp]
C[W114: White should probably play the sequence in the variation
before this play.]
;B[lq]
C[B115: Black must answer with all the moves from 115 through 121.]
;W[lp];B[kr];W[jq];B[np];W[no];B[op];W[ll]
;B[hi];W[ii];B[qf]
C[B125 is a good move.

Rin noted that this solves the ko problem in the corner and also
forces White to play 126.]
;W[pi]
C[W126: If White doesn't answer at 126, Black will push through
at 126 to cut off the white stones.]
;B[jc];W[jb];B[ib];W[ic];B[lb];W[hb]
;B[jr];W[ir];B[bm]
C[B135: If Black draws back at N7 with this move, provoking a white
connection at J12, he is left with a slightly dissatisfied feeling.

Rin commented that if he had pushed once at H10 before playing
this move, the game would have been easier to understand.]

(;W[hj]
C[W136: White could also hane at N7. See the variation.]
;B[mm]
C[B137: At this stage White is a little behind.]

(;W[nd]
C[W138 is a mistake. See the variation.]
;B[nf]
C[B139: White overlooked this response. The white stone at O16
becomes a gift.]
;W[rh];B[rk];W[rb]
C[W142: The go following 142 is not very good, but Ishida had thrown
caution to the winds in an all-out attempt to overcome his deficit.]
;B[rd];W[rc];B[qa];W[sd]
;B[se]
C[B147: Rin commented that he should have connected at S15 with
this move. White would then have no chance. However, Black had
lots of lovely ko threats in the upper left so he played 147
to start the ko.]
;W[oe];B[of];W[qd];B[pe];W[re];B[ae];W[ad];B[rd];W[ie]
;B[hd];W[re];B[ba];W[ab];B[rd];W[nq];B[nr];W[re];B[af];W[ca]
;B[rd];W[gd];B[ge];W[re];B[ag];W[ac];B[rd];W[lr];B[mr];W[re]
(;B[sf]
C[B177 is the losing move. It would have been better to play the
ko threat at L4. See the variation.]
;W[pa];B[ra];W[nb]
C[W180: After Black connected at T14 with B177, White had 178 (at
Q19) and 180 to snatch life out of thin air.

Rin noted that when he connected at T14 with 177 he thought the
corner was still ko. "There was no time left and the only excuse
I have was momentary insanity. I never dreamt that the lovely
ko threats in the upper left corner would be the seeds of my
defeat."]

(;B[nc]
C[B181: See the variation for the sequence Rin misread.]
;W[oa];B[oc];W[sa];B[sc];W[sb];B[rd];W[om]
C[W188 is a very satisfying ko threat and allows White enough time
to go on and win the ko with 192 to pull the season's biggest
reversal.]
;B[pl]
;W[re];B[lk];W[rd];B[lj];W[nk];B[kl];W[nl];B[pk];W[nm];B[og]
C[B199: If Black fails to play 199, White will play at L17 (Black
connects) and O15 (Black Q13, White P13) to kill all the black
stones on the upper side.]

;W[lm];B[mk];W[kk];B[mi];W[nj];B[ln];W[km];B[mo];W[nh];B[jl]
;W[jm];B[jj];W[jk];B[il];W[ki];B[kn];W[im];B[ik];W[ij];B[gk]
;W[hm];B[gl];W[io];B[kp];W[ji];B[li];W[mn]
C[W226: Black resigns after this play.]
)
(;B[oa]
C[Rin said that he mistakenly thought he could win this way.]
;W[qb]
C[However, after White connects here, ...]
;B[nc]
C[... Black must go back and protect here, ...]
;W[sa]
C[... allowing White to capture with 5. Now if Black captures the
ko at S16, White will simply connect at T17 to live with no fuss.]
))
(;B[kp]
C[When Black makes this ko threat, ...]
;W[sf]
C[... if White ends the ko, ...]
;B[jp];W[iq];B[kn]
C[.. Black captures five stones and can win.]
))
(;W[ne]
C[If White makes the normal move at O15, ...]
;B[nd];W[me];B[md];W[lm];B[mn];W[mo];B[ln];W[mk]
;B[oo];W[nn];B[om];W[rh];B[rk];W[bn]
C[... followed by this endgame sequence, White is still a little
behind--about six or seven points on the board. So Ishida plunged
in at O16 with 138. However, he had overlooked Black's response.]
))
(;W[mm];B[oo];W[om];B[pl];W[nl];B[nn];W[nm];B[mo];W[lo]
C[This sequence seems reasonable, but the difference from the game
sequence is not significant.]
))
(;W[rd];B[qb];W[rb];B[pa];W[re];B[qf];W[sf];B[qd];W[pi]
C[This is probably a little better for White.]
))
(;B[oj]
C[If Black simply pushes out with 103, ...]
;W[ni];B[ol];W[mk];B[pm]
(;W[qg]
C[... White N9 and R13 are difficult. See the variation.]
;B[nj];W[mj];B[kj];W[mi];B[jk]
C[To choose between this variation and the game sequence is very
difficult indeed.

Rin commented that this variation would have been better for
Black, but he likes territory better than fighting.]
)
(;W[jk]
C[If White surrounds the black stones this way, ...]
;B[nj];W[mj];B[pg]
C[... Black's territory seems larger.]
)))
(;B[og]
C[If Black played 97 here, ...]
;W[mj]
C[... White would extend to N10 and be confident of winning.]
))
(;B[po]
C[This will allow White to push out alongside.]
;W[pn]))
(;W[gp]
C[If White connects here, ...]
;B[dp];W[fp];B[co];W[bo];B[cr];W[br];B[bp];W[bq]
;B[bn]
C[... Black can resurrect his three stones at D5, D3, and E3, andcarve
a chunk out of the corner.]
))
(;W[cr]
C[If White descends here, ...]
;B[eo]
C[... Black will connect, and ...]
;W[fm];B[fr];W[gq];B[gn];W[gm];B[hm];W[hl]
;B[im]
C[White is not so successful.]
))
(;W[dl]
C[If White connects, he loses the corner when ...]
;B[cp]
C[.. Black comes chomping in. Moreover, the two black stones at
E8 and E9 still have potential, so a black move at G6 would also
be good.]
))
(;B[dl]
C[If Black connects immediately, ...]
;W[ep];B[eo];W[dq]
C[... White gets one stone, and ...]
;B[en];W[em];B[fm];W[bo];B[gn]
C[... can force Black to capture. This may not appear to be much
different from the actual game sequence, but in the game up to
move 80 Black has sente, and the difference of just one move
at this stage of the game is very great.]
))
(;W[ep];B[eo];W[co]
C[This is better for White. After this, ...]
;B[lo];W[mc];B[nd];W[nj]
C[... this sequence seems reasonable. Then ...]
;B[oh];W[qp]
C[... White will probably try to get into the lower right corner,
and ...]

;B[pp];W[ro];B[rp];W[qn];B[po];W[ql]
C[... after this it gets too complicated to predict. However, this
is better for White than the actual game sequence.]
))
(;W[dl]
C[If White plays this way, ...]
;B[dj];W[ek];B[fq]
C[... Black can jump in this far, which is not so nice for White.]
))
(;B[mg];W[qj]
C[If White makes this play at R11, Black will respond at R9.]
;B[qh];W[oj];B[kh]))
(;B[mg]
C[If Black jumps to N13, ...]
;W[qj]
C[... White will split the right side, and ...]
;B[ql]
C[... it is assumed that Black will block from this side.]
;W[qf];B[qd];W[of];B[ne];W[oj];B[ic]
;W[en]
C[This is the best sequence. The black territory in the upper side
is large, but that cannot be helped.]
))
(;W[ld];B[ca]
(;W[ac]
C[Playing here leads to a problem for White. See the variation
for avoiding it.]
;B[fb];W[ed];B[ea];W[ba];B[aa];W[fa];B[ga];W[ad]
;B[da];W[ec];B[fa];W[gc];B[hb];W[hc];B[ib];W[ic];B[jc]
C[White is obviously in a great deal of trouble. So he must follow
the other variation.]
)
(;W[da]
C[This is better for White, but ...]
;B[kc];W[le];B[mb]
C[... Black now prepares the ko that results from Black A15, White
A16, Black A19. This is a nice ko for Black. If White chooses
to remove the ko potential right away, Black could take the good
point at C5.]
)))
(;W[gc];B[hc];W[ke];B[kd]
(;W[le]
C[See the variation for what happens if White hanes here.]
;B[ld];W[me];B[nc])
(;W[ld];B[le]
C[Black will probably cross-cut.]
;W[md];B[ca];W[ac];B[me]
C[After the exchange in the corner, Black will extend here and
....]
;W[ne];B[nd]
C[..react strongly. Now White is in a mess, isn't he? If Black
gets to make the cut at F18, White will take at E16, Black can
link up at E19, White throws in at B19, and after Black captures
at A19, White connects at A16. Black can always use this sequence
with the hanging connection at J19 to make life on the edge and
make full use of the attachment with B39 at L16.]
)))

