EVENT
BOARDSIZE 19
BLACK Geoffrey Gray, 5k
WHITE Yoshiaka Nagahara, 3p
PLACE Tokyo
DATE Sep 1970
HANDICAP 9
KOMI 0.5
RESULT W+Resign
ANALYSIS John Diamond
SOURCE BGJ 19, January 1973, Page 14
SETUP B d16 k16 q16 q10 q4 k4 k10 d10 d4
COM
Copyright British Go Association 1973, 2002
Comments by John Diamond except "G:" by Geoffrey Gray.
ENDCOM
W 1 r14
B 2 o16
W 3 f3
B 4 d6
W 5 n4
B 6 q6
W 7 k7
COM
White 7: A slightly unusual move. It is played to intimidate black
into thinking that his handicap stone has become isolated and
therefore needs to make two eyes. The usual attack is one point
lower.
ENDCOM
B 8 g5
COM
Black 8: G: This is questionable; Nagahara says it is bad but
Basic Techniques of Go says it is good!
--
: In any event it isn’t so bad as it has the correct idea of separating
white’s stones into small weak groups whilst solidifying black’s.
ENDCOM
W 9 d3
COM
White 9: Played to stabilise white’s stone 3 and make trouble for
black in the corner.
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B 10 c3
COM
Black 10: Correct.
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W 11 c2
B 12 b2
MARK A@c4 B@d2
COM
Black 12: Also correct. White is threatening to play at 13(A), but
black must not be afraid of this as he has the counter-cut at 22(B).
ENDCOM
W 13 c4
B 14 b3
W 15 f5
B 16 f6
MARK A@g4 B@g6 C@e4 \T@d5
COM
Black 16: Bad, as it leaves black full of weaknesses at cutting points
and lets white play at 17('triangle') to force black into bad shape. It
would have been better at A, B or 18(C).
ENDCOM
W 17 d5
B 18 e4
W 19 e5
B 20 e3
MARK A@f4
COM
Black 20: Black can’t play at 23(A) because white captures 3 stones with a move one point to its right.
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W 21 e2
B 22 d2
PRISONER d3
W 23 f4
B 24 d3
W 25 e6
MARK #11 \T@d3
COM
White 25: See how white has sacrificed 9(\t) and 11 to gain good
shape for his stones and play at 25 to point at all black’s
weaknesses.
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B 26 g6
MARK H@m5
COM
Black 26: G: Better at H, this move only makes
Black’s stones into one big, heavy, and thereby attackable group.
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W 27 e8
B 28 g8
MARK #5 #7 H@m5
COM
Black 28: Again it would have been better to have played at H
separating White’s stonees 5 and 7.
--
G: Having played at 28 to protect these stones I have to continue with
my plan.
ENDCOM
W 29 g9
B 30 j8
MARK F@f9 #7 #28
COM
Black 30: Nice light play, attacking 7 and threatening to play at F.
--
G: Analysis of moves 28 and 30 shows that 28 is wasted.
ENDCOM
W 31 f8
B 32 h8
MARK E@j7 #28
COM
Black 32: G: Bad. This move is very heavy; it should be replaced by E.
--
E also protects 28 from capture.
ENDCOM
W 33 f17
B 34 d14
W 35 m16
B 36 g16
MARK #35 B@p14 C@n15 D@l15
COM
Black 36: Quite a good move, attacking White very vigorously.
However, B, C or D are also very strong attacks in reply directly
to 35.
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W 37 d17
B 38 c17
W 39 c18
B 40 b18
W 41 c16
B 42 b17
W 43 f16
B 44 e16
MARK G@d15 A@e17 B@f15 D@l15 I@g15
COM
Black 44: This should have been calmly played at G.
G: I played this so that I could play at 46(A) or 45(B) next.
: After G a play at B would be very small and a play at I can be
answered with D.
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W 45 f15
B 46 e17
MARK A@e14
COM
Black 46: Better to play at 87(A) and protect the left hand side.
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W 47 m18
MARK #35
COM
White 47: Isolating the middle handicap stone from the right corner
and starting to form a base for 35.
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B 48 k18
W 49 m14
B 50 k14
W 51 o14
B 52 r15
MARK A@r16 B@p14 C@q14 \T@r14
COM
Black 52: Should have been at 59(A) to aim at playing B or 53(C) to
capture \t.
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W 53 q14
B 54 o18
MARK H@p15 \S@m18 C@n15
COM
Black 54: Should be at H as the move played still leaves the corner
open because of white’s stone at 'square'.
--
G: Nagahara as white usually leaves possibilities open for Black,
e.g. C at the moment, and usually waits for black to force him to
cover up these threats!
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W 55 r17
B 56 q17
MARK A@s15
COM
Black 56: A weak answer as it allows White play at 57(A).
--
G: I was worried about my group in case white could live in the
corner should I stop his connection.
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W 57 s15
B 58 s16
COM
Black 58: Played to get a live group in the corner although it allows
white to get a settled group on the outside.
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W 59 r16
B 60 s17
MARK #52
COM
Black 60: Black must of course give up his stone now at 52.
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W 61 q15
PRISONER r15
B 62 r18
W 63 k12
COM
White 63: White does not save his two stones, which is only worth
one point since if Black captures white can retake immediately, but
instead proceeds to attack Black by separating the stones on the
upper side from the central stone.
ENDCOM
B 64 l13
W 65 l11
B 66 m12
COM
Black 66: This sequence is not too bad for Black.
ENDCOM
W 67 n17
COM
White 67: A curious move for a professional - he seems to be
worried about some disconnection possibilities, but it is still tricky
for Black.
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B 68 l15
MARK K@n14 A@o17 B@p17 L@n13 J@m15
COM
Black 68: An odd move. He cannot cut at K because after 69(A),
70(B) white can connect by J, K, L.
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W 69 o17
B 70 p17
W 71 n18
B 72 p19
W 73 o15
MARK C@n15
COM
White 73: Prevents Black playing at C.
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B 74 q12
MARK C@n15
COM
Black 74: Attacks White’s group: however, it seems to be able to
get two eyes quite easily because White can play C.
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W 75 o12
B 76 m11
W 77 l10
B 78 o11
MARK A@f13
COM
Black 78: G: I was worried about connecting my weak groups.
--
: This is in fact not necessary, for he can counter-attack by playing
at 93(A), separating White’s groups instead.
ENDCOM
W 79 k8
MARK M@h10
COM
White 79: G: From here on M is a good move and Nagahara only
stops me playing there when he is forced to by me!
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B 80 h12
COM
Black 80: Very curious.
--
G: It does not do anything.
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W 81 h14
B 82 j13
MARK M@h10
COM
Black 82: G: Stopping connection, but M is still very good.
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W 83 j15
COM
White 83: Making space for himself on the upper side.
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B 84 k15
W 85 f12
B 86 d12
MARK M@h10 A@j11 B@g10 N@j10 P@h11 #80 Q@k11 R@l12 S@l9 C@g11
COM
Black 86: G: Bad, purely territorial.
--
: M should be played; tactical and therefore urgent moves have
priority over big territorial ones.
--
G: If M and White 98(A) then what?
: 95(B) resists the cuts with strength. Also N is quite good. If P, Q,
80, R, 97(C) leaves Black with a cut at S for safety.
ENDCOM
W 87 e14
B 88 e13
MARK A@d15 B@e15
COM
Black 88: G: Idiotic. I cannot follow up at 91(B) after the next move
at 89(A). A better move would have been 89.
ENDCOM
W 89 d15
B 90 c15
W 91 e15
B 92 b16
PRISONER c16
W 93 f13
B 94 f10
W 95 g10
B 96 f9
W 97 g11
MARK M@h10
COM
White 97: After this M is no good any longer! The black group on the
lower side is now in jeopardy.
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B 98 j11
W 99 j9
B 100 k9
W 101 l9
B 102 h9
W 103 h10
B 104 j10
PRISONER j9
MARK \T@k4 \S@n4
COM
Black 104: Black has now saved his one central stone in gote and
should have counter-attacked using black 'triangle' to strengthen his
group and weaken white’s stone at 'square'.
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W 105 j12
B 106 h13
W 107 h11
COM
White 107: Black’s lower group is now finally cut off from the
upper one and must find its own life.
ENDCOM
B 108 j14
MARK T@j6
COM
Black 108: A ghastly mistake - it should have been at T. White
can cut Black’s upper group in half by U, 108, V but Black can gain
an easy life by playing at W.
ENDCOM
W 109 k11
B 110 j9
MARK T@j6
COM
Black 110: No! Black must give up these four stones which will
connect all White’s central stones into a live group and play T. After
this Black has no alternatives to losing eight stones, thereby
connecting the lower left group to White’s triumphant central one and
thus leaving white with no problem at all.
ENDCOM
W 111 g7
B 112 h7
W 113 h6
B 114 f7
PRISONER g7
W 115 j7
B 116 g7
W 117 h5
B 118 g4
W 119 h4
B 120 g3
W 121 g2
B 122 h3
W 123 j3
B 124 h2
W 125 j2
B 126 g1
W 127 f2
B 128 j4
W 129 e7
COM
Black resigns after 129.
ENDCOM