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Gordon W. Scott - Peter J. Batchelor [E04]
British Championship 2015
1.d4
Nf6
2.c4
e6
3.g3
d5
4.Nf3
dxc4
5.Bg2
Bb4+
6.Bd2
c5
7.Bxb4
cxb4
8.Ne5
0-0
9.Nxc4
Nc6
10.e3
e5
11.d5
b5
12.0-0
bxc4
13.dxc6
Qb6
14.Nd2
Ba6
15.Qc2
c3
16.bxc3
Bxf1
17.Rxf1
a5
18.cxb4
axb4
19.Rc1
Qc7
20.Qb2
Rfb8
21.Nc4
Rb5
22.Rd1
e4
23.Nd6
Rd8
24.Qc2
Rb6
25.Nxe4
Rxd1+
26.Qxd1
Rxc6
27.Nxf6+
Rxf6
28.Qa4
Qc5
29.Qe8+
Qf8
30.Qxf8+
Kxf8
31.Bd5
Rf5
32.Bb3
Rc5
33.f4
Ke7
34.h4
f6
35.Kg2
Rc1
36.Kf3
h6
37.Kg4
Rf1
38.Bc4
Rf2
39.h5
Rc2
40.Bd5
Rc3
41.Kf3
Rc5
42.Ke4
Kd6
43.Bf7
f5+
44.Kf3
Rc3
45.Bb3
Kc5
46.Kf2
Kb5
47.Ke2
Rc1
48.Kf2
Rh1
49.Kg2
Rb1
50.Kf3
Kc5
51.Bf7
Rb2
52.Bb3
Rh2
53.Bf7
Kb5
54.Bb3
Ka5
55.Bf7
Ka4
56.e4
fxe4+
57.Kxe4
Rg2
58.Kf3
Rg1
59.g4
Ka3
60.Be6
Rf1+
61.Kg3
Kb2
62.g5
Kc3
63.gxh6
gxh6
64.Kg4
Kd4
65.Kf5
Ke3
66.Kg6
Kxf4
67.Kxh6
67...Ke5
Best; the only other winning move is 67...Rg1 (one move slower). 68.Bb3
As good as anything. 68...Kf6
Again best, the alternative being ...Rg1. 69.Bc4
It looks natural to defend a2 and attack the R although the tablebase says Ba4 or Bc2 last one move longer. 69...Rf5
Many moves win but Rd1 is best. 70.Bg8
Relatively best (equal with Bb3). 70...Ra5
One of several moves that mate in 37. 71.Bc4
Ra7
[71...Ra8
(threatening mate on h8) is the right idea although it is in fact only one move quicker says Probe. The point is that White must then play Kh7 as eventually happens in the game.] 72.Bd5
White can only wait and hope Black cannot find the winning plan. 72...Rc7
[72...Rd7
73.Bc4
Rd8
(again threatening mate) is one move quicker.] 73.Bb3
Rc8!
At last finding the right idea to move on to the next phase of the solution. 74.Kh7
Rd8!
Before playing ...Kg5 (which wins more slowly) Black wants his rook on a dark square. [74...Kg5?
75.Kg7!
and White can draw, e.g., 75...Kxh5
The black king has been dragged too far from the queenside, it seems. 76.Be6
It was to avoid this tempo-gaining move that Black first played ...Rd8 before ...Kg5. On e6 the bishop creates a temporary barrier that lengthens the Black king's path to the queenside: a subtle but crucial difference from the main line. 76...Rc5
77.Kf6
Kh4
78.Bb3
Kg4
79.Ke6
Kf4
80.Kd6
Rc1
(80...Rb5
81.Bc4
Rh5
82.Bd5!?
Several moves draw in fact, now the White king is near enough to the pawns. (A simpler way is 82.Kc6
Ke3
83.Bb3
Kd2
84.Kb6
Kc3
85.Ka6
By no means the only safe move 85...Kb2
86.Kb6
Ka3
87.Ka6
White draws as long as only one file separates his king from the Black pawn. 87...Rh2
88.Kb5
or Ka5 88...Rh3
(88...Rb2!?
should also be met by a B move such as Be6 but not 89.Kc4??
Rb1
zugzwang.) 89.Bc4=
or Be6 or Bf7 or Bg8. ) 82...Ke3
83.Kc5
Kd3
It might look as if the self-pin has got White into trouble. 84.Kc6!
The unpin saves White. 84...Kc3
85.Bb3
Kb2
Black's plan is to win the king and pawn ending, but... 86.Kb6!
Rh3
87.Bc4
The B runs away and Black cannot make progress. Note however that Be6?? loses to Rh6 and also Bd5 loses: (87.Bd5??
Rh6+!
forcing the king to the seventh rank, and after 88.Kb7
Ka3
89.Bg8
Rh2
90.Kb6
Rxa2
etc.) ) 81.Kd5
Ke3
82.Bc4
Also Ba4 holds. 82...Kd2
83.Kc5
Kc3
84.Bb3
and Black cannot win because his own pawn is vulnerable.] 75.Bc4
Rb8
This does not spoil the win but Black could have played ...Kg5 at once. [75...Kg5
76.Kg7
(76.Bf7
as in the game is slightly better but still loses.) 76...Kxh5
77.Kf6
Kg4
78.Ke5
(78.Bb3
Re8
is the start of the tablebase's longest variation.) 78...Kf3?!
and the White king cannot get near the Black pawn in time.] 76.Bb3
Rf8
76...Rd8 is one move quicker says the tablebase. Black's idea with the text was presumably to deny Bf7 in reply to ...Kg5. 77.Bg8!?
Ingenious though it makes no difference to the result according to the tablebase. 77...Kg5??
Without this Black cannot make progress but he should have the R on d8 first. Now the game should be drawn because White plays Kg7 with tempo. [77...Rd8!
returns to the winning path: 78.Bc4
Kg5
79.Bf7
Rd2
80.Kg7
Rh2
Zugzwang! 81.Kf8
Trying to get over to the queenside. (81.Kg8
loses one move faster.) 81...Kf6
82.Ke8
Re2+
83.Kf8
Re5
84.h6
The h-pawn cannot be saved, e.g. (84.Be8
Re7
85.Bc6
Rc7
86.Be8
Ra7
87.h6
Rh7
88.Kg8
Rxh6
; 84.Bg6?
Ra5
; 84.Kg8?
Ra5
) 84...Re7!
85.Bb3
Rh7
86.Ke8
Rxh6
87.Kd8
Ke5
88.Kd7
Kd4
and compared with the drawing lines earlier, the White king cannot get close enough to the b-pawn.] 78.Kg7!
Rf6
79.Bf7
Ra6
80.Kh7??
This should have been the losing move and the first move on the winning path is not difficult to see. Black had about 7-8 minutes left (plus increments) and thought for most of his time before deciding he could not win and played Rxa2. However... [80.Bc4[]
White establishes a fortress defending his pawns and may even advance h5-h6 if Black is careless. 80...Ra7+
(80...Rh6
81.Bf7[]
; 80...Rd6
81.Bf7
Rc6
82.Bg6
) 81.Bf7
] 80...Kf6!
Black mates in 36. [Instead of 80...Rxa2?
81.Bxa2
Kxh5
82.Kg7
b3
83.Bxb3
with a draw, as actually occurred.] 81.Bb3
81 Bg8 loses in the same number of moves and others are worse. [81.Bg8
Rd6
82.Kh6
Rd8
83.Kh7
Kg5
84.Bf7
Rd2
85.Kg7
Rh2
winning as in the 77...Rd8 variation] 81...Rd6
82.Bc4
[82.Kh6
Rd8
etc.] 82...Kg5
83.Bf7
Rd2
84.Kg7
Rh2
This L-shaped rook manoeuvre is again the key to winning the position. The double attack
on the a-pawn and h-pawn force the White K to abandon its g7 square after which zugzwangs and double
threats eventually force the h-pawn to advance to h6 where it is inevitably lost. Then the white king on the edge cannot get to the drawing zone a6-b6-c6 where it needs to be when Black tries to win by an exchange sacrifice on a2 or b3. 0-1
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