Black to play for a winning game

Casual Game, https://itsyourturn.com
Analysis of JUMPER vs. John Coffey

1 2 3 4 5 6 7 8 h g f e d c b a 0

(black to move) 1. d4 e6 2. e4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Nf3 Bd6 6. Be2 O-O 7. O-O c6 8. Bg5 h6 9. Bh4 Bf5 10. Bd3 Bxd3 11. Qxd3 Nbd7 12. Rfe1 Qc7 13. Bg3 Rfe8 14. Bxd6 Qxd6 15. Ne2 Re6 16. Ng3 Rae8 17. Rxe6 Rxe6 18. Re1 Qe7 19. Rxe6 Qxe6 20. Qe2 Ne4 21. Nxe4 dxe4 22. Nd2 Qxa2 23. Nf1 Qxb2

[ Flip the board | Reset | Options… ] Play chess online

 

Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

White to play

October 2018 Open Main #1 Tournament, https://itsyourturn.com
Analysis of John Coffey vs. Csonka Andrews

8 7 6 5 4 3 2 1 a b c d e f g h -2

(white to move) 1. d4 d5 2. c4 e6 3. Nf3 Nd7 4. Nc3 Ngf6 5. Bf4 dxc4 6. e4 Nb6 7. Bxc4 Bd7 8. Bd3 Bb4 9. O-O O-O 10. Rc1 Bc6 11. e5 Nfd5 12. Bxh7+ Kxh7 13. Ng5+ Kg6 14. Qd3+ f5 15. exf6 e.p.+ Kxf6 16. Be5+ Kxg5 17. Qh7 Rf4 18. g3 Qf6 19. Ne4+ Rxe4 20. f4+ Nxf4 21. gxf4+ Rxf4 22. Bxf4+ Kg4 23. h3#

[ Flip the board | Reset | Options… ] Play chess online

 

Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

What is the best move for White?

October 2018 Open Main #1 Tournament, https://itsyourturn.com
Analysis of John Coffey vs. Joao Goncalo

8 7 6 5 4 3 2 1 a b c d e f g h +1

(white to move) 1. d4 d5 2. c4 c6 3. e3 Bf5 4. cxd5 cxd5 5. Nc3 e6 6. Qb3 Nf6 7. Qxb7 Nbd7 8. Nf3 Bd6 9. Qa6 O-O 10. Qxd6

[ Flip the board | Reset | Options… ] Play chess online

 

Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

Black to play and win

October 2018 Open Main #1 Tournament, https://itsyourturn.com
Analysis of Joao Goncalo vs. John Coffey

1 2 3 4 5 6 7 8 h g f e d c b a +2

(black to move) 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Be2 Nh6 7. O-O cxd4 8. cxd4 Nf5 9. Be3 Qxb2 10. Nbd2 Nfxd4 11. Nxd4 Nxd4 12. Rb1 Nxe2+ 13. Qxe2 Qc2 14. Qb5+ Qc6 15. Rfc1 Qxb5 16. Rxb5 b6 17. Nb3 Ba6

[ Flip the board | Reset | Options… ] Play chess online

 

Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight