Pieces need to combine well for success

Throughout the game, the planning should be such that there is co-ordination between the pieces, during attack as well as defence. If the pieces are disjointed or not connected with each other, it is easier for the opponent to break through.

 In the game which follows, White’s pieces enjoy good connectivity and co-ordination. The Queen is always in harmony with the bishops and rooks and Black fiinds it difficult to ward off the attack and loss of material.

White: Samuel Reshevsky – Black: Donald Byrne
New York, 1957, Benoni Defence
1.d4 Nf6 2.c4 c5 3.d5 e5
The Benoni Defence
4.Nc3 d6 5.e4
If 5.g3 g6 6.Bg2 Bg7 7.e4 0–0 8.Nge2 Ne8 9.0–0 f5
5...Be7 6.Bd3 0–0 7.Nge2 Ne8
Retreating back to restart from a different square
8.Be3 Nd7. If 8...f5 9.exf5 Bxf5 10.Bxf5 Rxf5 11.Ng3 Rf7 12.Nce4 which is slightly better for White
9.Qd2 a6 10.Ng3.
White can consider 10.g4
10...Ndf6  11.h3. If 11.f3    f5 And if 11...g6 12.Bh6 Ng7 13.h4   h5
11...g6. With the idea of pushing h5 h4
12.Bh6 Ng7 13.0–0 Bd7
If 13...Kh8 14.f4 Ng8  15.Bxg7+ Kxg7  16.f5 with a slight edge for White
14.f4  exf4 15.Bxf4  
White wants to push his central pawns
15...Nfh5. If 15...Qc7 16.Rae1
16.Nxh5 Nxh5 17.Bh2 f6
If 17...Qc7 18.g4 Ng7 19.Qh6
18.Nd1. He also wants to start afresh and move onto the King side
18. ..b5 19.Ne3 Ng7 20.Rf3 bxc4 21.Nxc4
If 21.Bxc4 f5 22.e5 dxe5 23.d6+ Be6 24.Bxe5 with White in a better position
21...Bb5 22.a4
If 22.Rc1 f5 23.exf5 (23.e5 dxe5 24.Bxe5 Nxe5) Bxc4 24.Bxc4 Nxf5
22...Bxc4 23.Bxc4 Kh8. Getting out of the diagonal as he wants to push f5. If directly 23...f5 24.e5   e6 24...dxe5 25.d6+ Kh8 26.dxe7 Qxd2 27.exf8Q+ Rxf8 28.Bxe5 Re8 (28...h6 29.Rd3 Qc2 30.Bc3 31. d7) 29.Bc3 Qd6 (29...Qc2 30.Bd3 Qb3 31.Bb5   32. e8, 32. g7) 30.Rd3 Qf4 (30...Qc6 31.Rad1  32. d7) 31.Bf7 Rf8 32.Rd7 things become difficult for Black
24.g4. White starts advancing his pawns to put pressure on his opponent’s King
24. ..f5. Here Black can also give a thought to 24...Qd7
25.exf5 gxf5 26.Raf1
Doubling rooks on the crucial file
26. ..fxg4. Black does not have much choice here. If 26...Qd7 27.a5 fxg4 28.Rxf8+ Rxf8 (28...Bxf8 29.Qf4) 29.Rxf8+ Bxf8 30.Qf4   31.hg  and White is distinctly better
27.Rxf8+ Bxf8 28.hxg4 Qd7 29.Qf4 Be7
If 29...Qxa4 30.Qxf8+ Rxf8 31.Rxf8 checkmate
Diagram 1
30.Bd3 c4 31.Bc2 Ne8.
If 31...Qe8 32.Qe4 Qg6 33.Qxe7 Qxc2 34.Qf8+
32.Kh1. If 32.Qf7 Qxg4+ 33.Kh1 Qg7 leading to equality and if 32.Qe4 Nf6 33.Qd4 Kg8 34.Bf5  White is forced to exchange Queens
32...Nf6. If 32...Bf6 33.g5 Bg7 34.Qe4 Bxb2 35.Rf8+ Kg7 36.Qxh7+
33.g5 Rf8. If 33...Ng4 34.Qf7 And if  33...Nh5 34.Qd4+ Ng7 (34...Kg8 35.Bf5) 35.Rf7 Rg8 36.Qh4 h5 37.Qxh5+ Nxh5 38.Rh7 checkmate
34.gxf6 Bxf6 35.Qxd6 Qg7 36.Rg1 Qh6 37.Qf4 Qxf4 38.Bxf4 Bxb2 39.Bg3 Re8 40.Re1 Rg8 41.Kh2 Rd8  and Black resigned.
Diagram 2
Black to play and win
1.. Rxf3 2.Rxb7
If 2.Qxe2 Rxf1 checkmate
2...Qxc4 3.Ng3 and White is lost.