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Michael Adams (2740) - Richard Rapport (2671)
48th Biel International Chess Festival 27.07.2015
1.e4
e6
2.d4
d5
3.Nd2
Be7
4.Ngf3
Nf6
5.Bd3
c5
6.e5
Nfd7
7.c3
Nc6
8.0-0
h5
9.Qe2
a5
10.dxc5
Qc7
11.Bb5
a4
12.b4
axb3
13.Nxb3
Nxc5
14.Nxc5
Bxc5
15.c4
0-0
16.Bf4
dxc4
17.Bxc4
Be7
18.Rac1
Ra3
19.Rfe1
Rd8
20.Bb3
Ra5
21.Ng5
g6
22.Qe3
Bb4
23.Re2
Ba3
24.Rc3
Bb4
25.Rc1
Ba3
26.Rc3
Bb4
27.Rc4
Rad5
28.h4
b5
29.Rc1
Rd3
30.Qe4
R3d4
31.Qf3
Bb7
32.Qg3
Ba3
33.Rc3
Bf8
34.Nxe6
fxe6
35.Qxg6+
Qg7
36.Bxe6+!?
[Time was running short but the online engine spotted a win by 36.Qxe6+!
Kh8
37.Rg3
Rxf4
(37...Bc8
38.Qxc6
) 38.Rxg7
Bxg7
39.Qg6
] 36...Kh8
37.Qxh5+
Qh7
38.Qxh7+
Kxh7
39.Bf5+
Kh8
40.Be4
b4
41.Rc1
Rd1+
42.Re1
Rxc1
43.Rxc1
Nd4
44.Bxb7
Ne2+
45.Kh2
Nxf4
46.g3
Ng6
47.f4
Rd2+
48.Kh3
Rxa2
49.Rc8
Rf2
50.h5
Nxf4+
51.gxf4
Rxf4
52.Kg3
Rf5
53.Kg4
Rxe5
54.Rxf8+
54...Kg7
55.Rf3
This is not the best square for the rook although, with best play, is only move slower to mate than White's optimal plan which forces the h-pawn through or mates: [55.Rd8!
Rc5
This is the plan adopted by Black in the game: to have checks from the side and support the b-pawn from behind if necessary. (55...b3
is instructively refuted: 56.Rd6
b2
57.Rb6
Re2
The Black rook is now tied down to the defence of its pawn and importantly cannot check on g2. 58.Kf5
A little triangulation to rule out side-checks 58...Rf2+
59.Kg5
Re2
60.h6+
Kh7
Now the tablebase finds 61.Bc8
Also Bf3 and Bc6 win in the same number of moves. The threat is Bf5+. 61...Rg2+
62.Bg4
The king must retreat. 62...Kh8
63.Rb7
Kg8
64.Kf5
Kh8
65.Rb8+
Kh7
66.Kg5
and Black can only prolong the game by giving up material.; 55...Rb5
) 56.Be4
Rc4
57.Kf4
Rc1
(57...Rc5?
58.h6+!
Kxh6
(58...Kf7
59.h7
and Black can only stop the pawn by giving up his rook.) 59.Rd7
is a mating net.) 58.h6+
Kxh6
59.Rd7
Rf1+
60.Kg4
Rg1+
61.Kh4
and Black can only prevent mate by the hopeless 61...Rg6
] 55...Rc5
Relatively best (equal). From here White should mate in 24, starting 56 Be4. 56.Ba6?!
Sub-optimal; adding five moves length to the task. 56...Rc6
57.Bb5
Rc5
58.Ba6
Rc6
59.Bb5
With only 50 moves to win material (or tempt the black b-pawn forward) White cannot really afford repetitions. 59...Rc5
60.Be8?!
[With 60.Bd3
; or 60.Bd7
it would still be 24 moves to mate but after White's next move it is 35!] 60...Rc4+
61.Kg5
61 Kf5 is slightly more accurate; two more moves added to the path. 61...Rc5+
62.Kg4
Rc4+
63.Kf5
This time the correct move. 63...Kh6
64.Re3
Rc5+
65.Kf6
Rc8
66.Ke7
Rb8
67.Rb3?!
This is the second-best move (mate in 33) but a serious retrograde step in terms of accomplishing the task. There was no need to blockade the pawn, especially as a pawn advance would "restart the clock". Serious progress towards a mating net was being made and White should have played [67.Re6+
which mates in 26. The tablebase's main line then goes 67...Kg7
(67...Kg5
68.h6
Rb7+
69.Bd7
Rb8
70.Kf7
Rb7
71.Rd6
) 68.h6+
Kh7
69.Bc6
Now there are no rook checks so Black must play 69...b3
Now the "clock" is off the agenda. 70.Be4+
Kg8
(70...Kh8
71.Kd7
b2
Black uses up his last tempo move, creating the possibility of winning the pawn. 72.Bb1
Kg8
73.Re2
Kh8
74.Kc7
and if Black continues to protect the pawn, he is mated in one by Re8.) 71.Kd7
b2
72.Bb1
Kh8
73.Kc7
Ra8
74.Rb6
etc.] 67...Kg5
68.Bg6
Kh6
69.Kd6
Rb6+
70.Kc7
Rb5
71.Kc6
Rb8
Now it is 37 moves to mate! 72.Bf7
Rf8
73.Bg6
Rb8
74.Kc5
Start of a new plan: Adams will transfer his king to the blockading role and try to win the b-pawn before it's too late. Could that have been prevented? 74...Rb7
75.Kd4
Rb8
76.Kd3
Rd8+
77.Kc2
Rb8
78.Kb2
Rb7
79.Re3
Kg7
80.Kb3
Kh6
81.Re5
Rb8
82.Be8
Rb7
83.Re6+
Kg7
84.Bg6
Rb8
85.Be4
Kh8
86.Re7
Rb5
87.Bg6
Rb6
88.Bd3
Rb8
89.Rd7
Rb6
90.Rd5
Kg7
91.Bb5
Kh6
92.Kxb4
With the fall of the b-pawn, the win becomes simpler, but still takes time. 92...Rb8
93.Kc3
Rb6
94.Kd4
Re6
95.Bd3
Re1
96.Ra5
Re7
97.Be4
Rg7
98.Bf3
Re7
99.Ra6+
Kg7
100.Be4
Kh8
101.Ra5
Kg7
102.Ke3
Rf7
103.Bg6
Rf6
104.Ke4
Rf8
105.Ra6
Rf6
106.Ra7+
Kh8
107.Bf5
Rf8
108.Kf4
Rb8
109.Kg5
Rg8+
110.Bg6
Rg7
111.Ra5
Rg8
112.Ra4
Rg7
113.Kf6
Rg8
114.Ra7
Rg7
115.Bf7
Kh7
116.Ra8
Kh6
117.Rb8
Rh7
118.Bg6
1-0
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