Fodor vs Adams - 105th British-ch 2018 Hull - Round 3

While playing through the game, scroll slowly so that when you get to the questions you can put some time on the clock (ten to fifteen minutes) and try and find the solution.

Fodor,Tamas Jr (2506) - Adams,Michael (2706)

105th British-ch 2018 Hull (3), 30.07.2018

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Bg5 h6 7.Bxf6 Qxf6 8.e3 E35: Nimzo-Indian: Classical: 4...d5 5 cxd5 exd5 [8.a3 Bxc3+ 9.Qxc3 0–0 10.Nf3 Bf5 11.e3 Rc8 12.Bd3 Bxd3 13.Qxd3 Nd7 14.0–0 c6 15.b4 a6 16.Rfc1 b5 17.Qc3 Nb6 18.Ne5 Nc4 19.a4 ½–½ (37) Andreikin,D (2736)-Giri,A (2767) Novi Sad 2016] 

8...0–0 9.a3 Bf5 10.Qb3 The position is equal. 

10...Bxc3+! 11.bxc3 

XABCDEFGHY
8rsn-+-trk+(
7zppzp-+pzp-'
6-+-+-wq-zp&
5+-+p+l+-%
4-+-zP-+-+$
3zPQzP-zP-+-#
2-+-+-zPPzP"
1tR-+-mKLsNR!
xabcdefghy

11...Qb6N [11...c6 12.Nf3 Nd7 13.c4 dxc4 14.Bxc4 b5 15.Be2 Nc5 1–0 (46) Papadakis,M-Dimitriou,G (2249) Nikea 2002] 

12.Qa2 Qa5 13.Qb2 c5 Hoping for ...cxd4. 

14.Nf3 Nd7 15.Bb5 Rfc8 16.Bxd7 Bxd7 17.0–0 Rc7 18.h3 Rac8 19.Rfc1 Qa6 20.Qd2 Bf5 21.dxc5 Rxc5 22.Nd4 Bd7 23.Nb3 Rb5 24.Nd4 Ra5 25.Rcb1 b6 26.Rb3 Rc4 27.Nf3 Bf5 28.Nd4 Bd7 29.Nf3 Rca4 30.Rb4 Rxb4 31.cxb4 Rxa3 32.Rxa3 Qxa3 33.Qxd5 Qc1+ 34.Kh2 Qc7+ 35.Ne5 Be8 [35...Be6!? 36.Qa8+ Bc8³] 

36.f4 a5 37.b5! Kf8 38.Nc4 Qd7 39.Nd6 f6 40.e4 Ke7 41.e5 fxe5 [41...Kf8!=] 

42.Qxe5+± 

XABCDEFGHY
8-+-+l+-+(
7+-+qmk-zp-'
6-zp-sN-+-zp&
5zpP+-wQ-+-%
4-+-+-zP-+$
3+-+-+-+P#
2-+-+-+PmK"
1+-+-+-+-!
xabcdefghy

Why is 42.fxf5 an error in this position?

00000

[But not 42.fxe5 Qe6=] 

42...Kf8 43.Nxe8 Qxe8 Endgame KQ-KQ 

44.Qd6+ Kg8? [44...Qe7± was worth a try. 45.Qxb6 a4 46.Qb8+ Qe8] 

45.Qxb6+- a4 

XABCDEFGHY
8-+-+q+k+(
7+-+-+-zp-'
6-wQ-+-+-zp&
5+P+-+-+-%
4p+-+-zP-+$
3+-+-+-+P#
2-+-+-+PmK"
1+-+-+-+-!
xabcdefghy

46.Qc5?

This error gave the initiative to Black. What was the alternative?

00000

[46.Qc6+- Kf8 47.Qc4] 

46...a3± 47.b6 a2 48.Qd5+ Qf7 49.Qa8+ Kh7 50.Qe4+ Qg6 51.Qxg6+ Kxg6² KP-KP 52.b7 a1Q ( -> ...Qb2) 

53.b8Q KQ-KQ 

53...Qd4 54.Qe8+ Kf6 55.Qf8+ Kg6 56.Kg3 Qe3+ 57.Kh4 Qe1+ 58.g3 Qe6 59.Qc5 Kf6 [59...Kh7=] 

60.Qc3+!± Kf7 

XABCDEFGHY
8-+-+-+-+(
7+-+-+kzp-'
6-+-+q+-zp&
5+-+-+-+-%
4-+-+-zP-mK$
3+-wQ-+-zPP#
2-+-+-+-+"
1+-+-+-+-!
xabcdefghy

61.Qe5?

This was Whites final error. What alternative did he have?

00000

[61.g4±]

The reply by Black forced an immediate resignation. What was it?

00000

61...g5+!  0–1