Winboard Forum

I modified Fruit so that it plays without null move:

source in http://arctrix.com/nas/chess/fruit/ (fruit_21_linux.zip), file: search_full.cpp, line 475:

if (UseNull & & depth> = NullDepth NODE_TYPE & &! = NodePV) {

changed in

if (0) {

so i have 2 engines:
fruit: fruit not modified
fruit_nonull: fruit without null move

in a match between fruit and fruit_nonull the winner is fruit (without null move). WHY ??

Thanks in advance

here the match:

[Event "Arena tournament"]
[Site "HP-Pavilio"]
[Date "2011.08.01"]
[Round "1"]
[White "Fruit"]
[Black "Fruit_nonull"]
[Result "0-1"]
[BlackElo "2200"]
[ECO "A43"]
[Opening "Old Benoni"]
[Time "14:51:22"]
[Variation "2.d5 Nf6 3.Nf3 e6 4.Nc3"]
[WhiteElo "2200"]
[TimeControl "300+0"]
[Termination "normal"]
[PlyCount "141"]
[WhiteType "program"]
[BlackType "program"]

1. Nf3 {(Ng1-f3 Nb8-c6 Nb1-c3 Ng8-f6 e2-e3 d7-d5 Bf1-b5 Qd8-d6 d2-d4 Bc8-f5
O-O Nf6-g4 g2-g3) +0.22/13 6} Nc6 {(Nb8-c6 Nb1-c3 Ng8-f6 d2-d4 e7-e6 e2-e3
Bf8-b4 Bf1-d3 O-O O-O d7-d5) -0.15/11 12} 2. d4 {(d2-d4 Ng8-f6 d4-d5 Nc6-b4
c2-c4 Nb4-a6 Nb1-c3 d7-d6 Bc1-f4 Na6-c5 b2-b4 Nc5-e4) +0.25/13 9} Nf6
{(Ng8-f6 d4-d5 Nc6-b4 c2-c4 c7-c6 Nb1-c3 c6xd5 c4xd5 Qd8-a5 e2-e4 d7-d6
Bf1-b5+ Bc8-d7 Bb5xd7+ Nf6xd7) -0.27/10 9} 3. d5 {(d4-d5 Nc6-b4 c2-c4
Nb4-a6 Nb1-c3 d7-d6 Nf3-d4 h7-h6 Bc1-f4 Na6-c5 e2-e3 e7-e5 d5xe6/ep Bc8xe6
Nd4xe6 f7xe6) +0.30/13 8} Nb4 {(Nc6-b4 c2-c4 Nb4-a6 Nb1-c3 d7-d6 Bc1-e3
c7-c6 Be3-f4 Bc8-f5 Nf3-d4) -0.37/10 7} 4. a3 {(a2-a3 Nb4-a6 Nb1-c3 c7-c6
e2-e4 c6xd5 e4xd5 Na6-c5 Bc1-e3 Nc5-e4 Nc3xe4 Nf6xe4 Nf3-e5 Qd8-c7)
+0.57/12 9} Na6 {(Nb4-a6 Nb1-c3 c7-c6 d5xc6 b7xc6 e2-e4 d7-d6 b2-b4 Nf6-g4
Qd1-d4 Qd8-b6) -0.51/10 11} 5. Nc3 {(Nb1-c3 c7-c6 e2-e4 Na6-c5 Qd1-d4
Qd8-b6 d5xc6 Nc5xe4 c6-c7 Ne4-c5 b2-b4) +0.54/12 8} d6 {(d7-d6 e2-e4 Na6-c5
Bf1-d3 Nc5xd3+ Qd1xd3 c7-c6 O-O Qd8-b6 Nf3-d4 Bc8-g4 Rf1-e1) -0.76/10 11}
6. e4 {(e2-e4 e7-e5 d5xe6/ep Bc8xe6 Nf3-g5 Bf8-e7 Ng5xe6 f7xe6 Bc1-e3 O-O
Bf1-c4 Qd8-c8 O-O Na6-c5) +0.79/12 7} Nc5 {(Na6-c5 e4-e5 Nf6-e4 Nc3xe4
Nc5xe4 Qd1-e2 Bc8-f5 Qe2-b5+ c7-c6 Qb5xb7 d6xe5 Qb7xc6+ Bf5-d7) -0.86/10 7}
7. e5 {(e4-e5 d6xe5 Nf3xe5 a7-a6 Qd1-d4 Nc5-d7 Ne5xd7 Bc8xd7 Bc1-f4 Nf6-h5
Bf4-e3 Nh5-f6 O-O-O) +0.74/11 5} dxe5 {(d6xe5 Nf3xe5 a7-a6 Bc1-e3 Nc5-d7
Ne5xd7 Qd8xd7 Bf1-e2 e7-e6 d5xe6 Qd7xd1+ Ra1xd1 Bc8xe6) -0.73/9 8} 8. Nxe5
{(Nf3xe5 a7-a6 Bc1-e3 Nc5-d7 Ne5xd7 Qd8xd7 Bf1-c4 Qd7-g4 Qd1xg4 Nf6xg4
Be3-f4 Bc8-f5 h2-h3) +0.80/10 4} a6 {(a7-a6 Bc1-e3 e7-e6 d5xe6 Bc8xe6
Qd1-f3 Qd8-d6 Ne5-d3 Qd6-b6 Nd3xc5 Bf8xc5 Be3xc5 Qb6xc5 Qf3xb7) -0.72/9 10}
9. Qd4 {(Qd1-d4 Nc5-d7 Ne5xd7 Bc8xd7 Bc1-f4 Nf6-h5 Bf4-e5 f7-f6 Bf1-e2
g7-g6 Be2xh5 g6xh5) +0.72/10 6} Ncd7 {(Nc5-d7 Bc1-f4 Nd7xe5 Qd4xe5 e7-e6
d5xe6 Bc8xe6 Qe5xc7 Qd8xc7 Bf4xc7 Nf6-d5 Nc3xd5 Be6xd5) -0.83/9 9} 10. Bf4
{(Bc1-f4 Nd7xe5 Bf4xe5 e7-e6 Bf1-c4 b7-b5 Bc4-b3 Bc8-b7 d5xe6 f7xe6 Qd4xd8+
Ra8xd8 Be5xc7 Rd8-d4) +0.75/11 12} Nxe5 {(Nd7xe5 Bf4xe5 e7-e6 Bf1-c4 b7-b5
Bc4-b3 Bc8-b7 d5xe6 f7xe6 Qd4xd8+ Ra8xd8 Be5xc7) -0.86/9 7} 11. Bxe5
{(Bf4xe5 e7-e6 Bf1-c4 b7-b5 Bc4-b3 Bc8-b7 O-O-O c7-c5 d5xc6/ep Qd8xd4
Rd1xd4 Bb7xc6) +0.83/10 5} e6 {(e7-e6 Bf1-c4 b7-b5 Bc4-b3 Bc8-b7 d5xe6
f7xe6 Qd4xd8+ Ra8xd8 Be5xc7) -0.86/9 6} 12. Bc4 {(Bf1-c4 b7-b5 Bc4-b3
Bc8-b7 O-O-O c7-c5 d5xc6/ep Qd8xd4 Rd1xd4 Bb7xc6 f2-f3) +0.88/10 4} b5
{(b7-b5 Bc4-b3 Bc8-b7 O-O-O c7-c5 d5xc6/ep Qd8xd4 Rd1xd4 Bb7xc6 f2-f3)
-0.88/9 5} 13. Bb3 {(Bc4-b3 Bc8-b7 d5xe6 f7xe6 Qd4xd8+ Ra8xd8 Bb3xe6 Bf8-d6
Be5xf6 g7xf6 O-O Ke8-e7 Rf1-e1 Bd6-f4) +0.83/11 6} Bb7 {(Bc8-b7 d5xe6 f7xe6
Qd4xd8+ Ra8xd8 Bb3xe6 Bb7xg2 Rh1-g1 Bg2-c6 Be5xc7 Rd8-d4) -0.86/9 7} 14.
dxe6 {(d5xe6 f7xe6 Qd4xd8+ Ra8xd8 Bb3xe6 Bf8-d6 Be5xf6 g7xf6 O-O Bd6-e5
Rf1-e1 Rd8-d2 Be6-f5) +0.72/11 6} fxe6 {(f7xe6 Qd4xd8+ Ra8xd8 Bb3xe6 Bf8-d6
Be5xf6 g7xf6 O-O Bd6-e5 Rf1-e1 Rd8-d2 Be6-f5) -0.72/9 5} 15. Qxd8+
{(Qd4xd8+ Ra8xd8 O-O Ke8-d7 Rf1-e1 Rd8-e8 Ra1-d1+ Bf8-d6 Rd1-d4 Rh8-f8
a3-a4 Bb7-c6 Re1-d1 Nf6-d5 Be5xd6 Kd7xd6 Nc3xd5 e6xd5 Bb3xd5 Bc6xd5 Rd4xd5+
Kd6-c6) +0.93/11 7} Rxd8 {(Ra8xd8 O-O Ke8-d7 Rf1-e1 Rd8-e8 Ra1-d1+ Bf8-d6
Rd1-d4 Rh8-f8 Re1-d1 Nf6-d5 Be5xg7 Nd5xc3 b2xc3) -0.85/9 5} 16. O-O {(O-O
Bf8-d6 Ra1-e1 Ke8-e7 Be5xf6+ Ke7xf6 Re1xe6+ Kf6-g5 Nc3-e4+ Bb7xe4 Re6xe4
Rh8-f8 h2-h4+ Kg5-h5 g2-g3 Rf8-f3 Kg1-g2 Rf3-f6) +0.91/12 6} Bd6 {(Bf8-d6
Ra1-e1 Ke8-e7 Be5xf6+ Ke7xf6 Re1xe6+ Kf6-g5 Nc3-e4+ Bb7xe4 Re6xe4 Rh8-f8
h2-h4+ Kg5-h6 Rf1-e1 Bd6-c5) -0.96/9 5} 17. Rfe1 {(Rf1-e1 Ke8-e7 Be5xf6+
Ke7xf6 Re1xe6+ Kf6-f5 Ra1-e1 Rd8-d7 Nc3-e4 Rh8-d8 Ne4xd6+ Rd7xd6 Re6-e7
Rd6-d1 Re1-f1 Rd1xf1+ Kg1xf1 Rd8-d1+ Kf1-e2) +1.09/12 5} Ke7 {(Ke8-e7
Be5xf6+ Ke7xf6 Re1xe6+ Kf6-f5 a3-a4 b5-b4 Nc3-e2 Kf5-g4 Ra1-e1 Bd6-c5
Bb3-c4) -0.73/9 5} 18. Bxf6+ {(Be5xf6+ Ke7xf6 Re1xe6+ Kf6-f5 Ra1-e1 c7-c5
Bb3-d5 Bb7xd5 Nc3xd5 Bd6xh2+ Kg1xh2 Rd8xd5 Re6-e7 Rd5-d2 Re7xg7 Rd2xc2
g2-g4+ Kf5-f4) +0.71/10 3} Kxf6 {(Ke7xf6 Re1xe6+ Kf6-f5 a3-a4 b5-b4 Nc3-e2
Kf5-g4 Ra1-e1 Bd6-c5 Bb3-c4) -0.73/9 5} 19. Rxe6+ {(Re1xe6+ Kf6-f5 Ra1-e1
c7-c5 Nc3-e4 Bb7xe4 Re6xe4 c5-c4 Bb3-a2 Rd8-d7 g2-g4+ Kf5-g5 Kg1-g2)
+0.71/10 4} Kf5 {(Kf6-f5 g2-g3 Rh8-e8 Ra1-e1 Re8xe6 Bb3xe6+ Kf5-g6 Be6-d5
c7-c6 Bd5-e4+ Kg6-h6) -0.73/9 3} 20. Rae1 {(Ra1-e1 c7-c5 Bb3-d5 Bb7xd5
Nc3xd5 Bd6xh2+ Kg1xh2 Rd8xd5 Kh2-g3 Rh8-d8 f2-f4 a6-a5 Re1-e5+ Rd5xe5
Re6xe5+ Kf5-f6 Re5xc5) +0.71/10 5} c5 {(c7-c5 Bb3-d5 Bb7xd5 Nc3xd5 Bd6xh2+
Kg1xh2 Rd8xd5 Kh2-g3 Rh8-d8 f2-f4 a6-a5 Re1-e5+ Rd5xe5 Re6xe5+ Kf5-f6
Re5xc5) -0.71/9 9} 21. Bd5 {(Bb3-d5 Bb7xd5 Nc3xd5 Bd6xh2+ Kg1xh2 Rd8xd5
Kh2-g3 h7-h5 f2-f4 h5-h4+ Kg3-f3 Rh8-d8 Re6xa6 Rd8-d6) +0.74/10 4} Bxd5
{(Bb7xd5 Nc3xd5 Bd6xh2+ Kg1xh2 Rd8xd5 Re6xa6 Rd5-d2 Kh2-g3 Rh8-d8 f2-f4
Rd8-d5 Ra6-b6) -0.78/10 4} 22. Nxd5 {(Nc3xd5 Bd6xh2+ Kg1xh2 Rd8xd5 Re6xa6
Rh8-d8 Kh2-g3 h7-h5 f2-f4 g7-g5 f4xg5 Kf5xg5 a3-a4 h5-h4+ Kg3-h3 b5-b4)
+0.98/11 3} Bxh2+ {(Bd6xh2+ Kg1xh2 Rd8xd5 Re6xa6 Rd5-d2 Kh2-g3 Rh8-d8 f2-f4
Rd8-d5 Ra6-b6 b5-b4) -0.81/9 2} 23. Kxh2 {(Kg1xh2 Rd8xd5 Re6xa6 Rh8-d8
Kh2-g3 h7-h5 Ra6-b6 Rd5-d2 f2-f4 Rd8-d5 Rb6xb5 Rd2xc2 Rb5-b3) +1.04/12 3}
Rxd5 {(Rd8xd5 Kh2-g3 Rh8-d8 f2-f4 Rd8-d6 Re1-e5+ Rd5xe5 Re6xe5+ Kf5-f6
Re5xc5 Rd6-d2 Rc5-c7) -0.82/9 1} 24. Rxa6 {(Re6xa6 Rh8-d8 Kh2-g3 h7-h5
Ra6-b6 Rd5-d2 Rb6xb5 Rd2xc2 b2-b4 Rd8-d5 Re1-e7 g7-g5) +0.99/12 4} Rhd8
{(Rh8-d8 Kh2-g3 h7-h5 f2-f4 g7-g5 f4xg5 Kf5xg5 a3-a4 h5-h4+ Kg3-h3 b5-b4)
-0.98/9 3} 25. Kg3 {(Kh2-g3 h7-h5 Ra6-b6 Rd5-d2 Rb6xb5 Rd2xc2 b2-b4 Rd8-d5
a3-a4 h5-h4+ Kg3xh4 Rd5-d4+ Kh4-g3 Rd4xb4) +0.91/12 4} h5 {(h7-h5 Ra6-b6
Rd5-d2 Rb6xb5 Rd2xc2 b2-b4 Rd8-d5 Re1-e7 g7-g5) -0.99/10 4} 26. Re7
{(Re1-e7 g7-g5 Re7-f7+ Kf5-e5 Ra6-h6 h5-h4+ Kg3-g4 Rd5-d2 Rf7-f5+ Ke5-e4
Rh6-e6+ Ke4-d4 c2-c3+ Kd4-c4 Kg4xg5 Rd8-g8+ Kg5xh4 Rg8xg2 Re6-e4+ Kc4-b3
Rf5xc5 Kb3xb2 Rc5xb5+ Kb2xc3) +1.08/12 4} g5 {(g7-g5 Re7-f7+ Kf5-e5 Ra6-h6
h5-h4+ Kg3-g4 Rd5-d4+ Kg4xg5 Rd8-g8+ Rh6-g6 Rg8xg6+ Kg5xg6 Rd4-g4+ Kg6-h5
Rg4xg2 Kh5xh4) -1.01/9 2} 27. Rf7+ {(Re7-f7+ Kf5-e4 Ra6-h6 h5-h4+ Kg3-g4
Rd5-d2 Rh6-g6 Rd2xc2 Rg6xg5 b5-b4 Rf7-e7+ Ke4-d4 a3xb4 c5xb4) +0.91/10 2}
Ke4 {(Kf5-e4 Ra6-h6 h5-h4+ Kg3-g4 Rd5-d2 Rh6-g6 Rd2xc2 Rg6xg5 b5-b4 Rf7-e7+
Ke4-d4 a3xb4 c5xb4) -0.91/10 7} 28. Rh6 {(Ra6-h6 h5-h4+ Kg3-g4 Rd5-d2
Rh6-g6 Rd2xc2 Rg6xg5 Rd8-d2 Rf7-f4+ Ke4-d3 Rg5-f5 c5-c4 Rf5-d5+ Kd3-e2
Rd5xb5 Rc2xb2 Rb5xb2 Rd2xb2 Rf4xc4 Ke2xf2 Kg4xh4 Kf2xg2) +0.91/11 6} h4+
{(h5-h4+ Kg3-g4 Rd5-d2 Rh6-g6 Rd2xc2 Rg6xg5 b5-b4 Rf7-e7+ Ke4-d3 a3xb4
c5xb4 Re7-e3+ Kd3-d4) -0.91/10 3} 29. Kg4 {(Kg3-g4 Rd5-d2 Kg4xg5 Rd8-g8+
Kg5xh4 Rd2xc2 Rf7-e7+ Ke4-d5 Rh6-h5+ Kd5-d6 Re7-a7 Rg8xg2 Ra7-a6+ Kd6-c7
Rh5-h7+ Kc7-b8 Ra6-b6+ Kb8-c8 Rb6xb5 Rg2xf2) +0.78/12 4} Rd2 {(Rd5-d2
Kg4xg5 Rd8-g8+ Kg5xh4 Rd2xc2 g2-g4 Rc2xb2 f2-f3+ Ke4-d4 Rf7-d7+ Kd4-e5
Kh4-g3) -1.01/10 3} 30. Kxg5 {(Kg4xg5 Rd8-g8+ Kg5xh4 Rd2xc2 g2-g4 Rc2xb2
f2-f3+ Ke4-d4 Rf7-d7+ Kd4-c4 Rh6-e6 Rb2-a2 Re6-e4+ Kc4-c3 Re4-e5 Ra2-h2+
Kh4-g3) +0.87/11 5} Rg8+ {(Rd8-g8+ Kg5xh4 Rd2xc2 g2-g4 Rc2xb2 Kh4-g3 Ke4-d5
Rf7-c7 Kd5-c4 Rh6-h5 Rb2-b3+ f2-f3) -0.92/10 4} 31. Kxh4 {(Kg5xh4 Rd2xc2
g2-g4 Rc2xb2 f2-f3+ Ke4-e3 Kh4-g3 Rg8-e8 Rf7-f5 c5-c4 Rh6-b6 Rb2-a2 Rf5xb5
Ra2xa3) +0.84/12 3} Rxc2 {(Rd2xc2 g2-g4 Rc2xb2 Kh4-g3 Rg8-e8 f2-f3+ Ke4-e3
Rf7-c7 c5-c4 a3-a4 b5xa4 Rc7xc4) -0.89/10 4} 32. g4 {(g2-g4 Rc2xb2 f2-f3+
Ke4-d4 Rf7-d7+ Kd4-c4 Rh6-e6 Rb2-b1 Re6-e2 Rb1-h1+ Kh4-g3 Kc4-c3 Rd7-d6)
+0.90/10 2} Rxb2 {(Rc2xb2 f2-f3+ Ke4-e3 Kh4-g3 Rg8-e8 Rf7-f5 c5-c4 Rh6-b6
Rb2-a2 Rf5xb5 Ra2xa3) -0.84/9 2} 33. f3+ {(f2-f3+ Ke4-d4 Rf7-d7+ Kd4-c4
Rh6-e6 Rg8-a8 Re6-e3 Rb2-a2 Re3-e4+ Kc4-c3 Rd7-d5 Ra8-c8 Re4-e3+ Kc3-c4)
+0.94/11 3} Ke3 {(Ke4-e3 Kh4-g3 c5-c4 Rf7-e7+ Ke3-d4 Rh6-h5 c4-c3 Re7-e4+
Kd4-d3 Rh5-d5+ Kd3-c2 g4-g5 Kc2-b1 Re4-e1+ Kb1-a2 Re1-e3) -0.95/10 3} 34.
Kg3 {(Kh4-g3 c5-c4 Rf7-e7+ Ke3-d4 Re7-e4+ Kd4-d5 Rh6-h5+ Kd5-d6 Re4-d4+
Kd6-e6 a3-a4 b5xa4 Rh5-h6+ Ke6-e7 Rd4xc4 a4-a3 Rc4-c7+ Ke7-d8) +0.97/11 2}
c4 {(c5-c4 Rf7-e7+ Ke3-d4 Re7-e4+ Kd4-c3 Rh6-b6 Rg8-a8 g4-g5 Rb2-b1 Re4-e5
Kc3-d4 Kg3-f4 Ra8-f8+ Rb6-f6) -0.97/10 6} 35. Re7+ {(Rf7-e7+ Ke3-d4 Re7-e4+
Kd4-c3 Rh6-h5 Rg8-d8 Re4-e5 Kc3-d4 Re5xb5 Rb2xb5 Rh5xb5 Rd8-a8 g4-g5
Ra8xa3) +0.87/11 5} Kd4 {(Ke3-d4 Re7-e4+ Kd4-d5 Rh6-h5+ Kd5-d6 Re4-d4+
Kd6-e6 a3-a4 b5xa4 Rh5-h6+ Ke6-e7 Rd4xc4 a4-a3 Rc4-c7+ Ke7-d8) -0.97/10 2}
36. Re4+ {(Re7-e4+ Kd4-c3 Rh6-b6 Rb2-b3 Re4-e5 Kc3-d4 Rb6xb5 Rb3xb5 Re5xb5
Rg8-a8 Kg3-f4 Ra8xa3) +0.87/10 2} Kc3 {(Kd4-c3 Rh6-h5 Rg8-a8 Re4-e5 Ra8xa3
Re5xb5 Rb2xb5 Rh5xb5 Kc3-d4 Kg3-f4) -0.87/10 2} 37. Re3+ {(Re4-e3+ Kc3-d4
Rh6-e6 Rg8-a8 Re6-e4+ Kd4-c5 g4-g5 Rb2-b3 Re4-e5+ Kc5-d4 Re3-e4+ Kd4-c3
g5-g6 Ra8xa3) +0.86/11 3} Kd4 {(Kc3-d4 Rh6-e6 Rg8-a8 g4-g5 Rb2-b3 Re6-e4+
Kd4-c5 Re4-e5+ Kc5-d4 Re3-e4+ Kd4-c3 g5-g6 Ra8xa3) -0.86/10 2} 38. Rhe6
{(Rh6-e6 Rb2-b1 Re6-e4+ Kd4-c5 Re4-e5+ Kc5-b6 Re5-e6+ Kb6-a5 Kg3-f4 Rb1-d1
g4-g5 Rd1-g1 Re6-e5 Rg8-d8) +0.86/11 1} Rb1 {(Rb2-b1 Re6-e4+ Kd4-c5 Re4-e5+
Kc5-c6 Re5-e6+ Kc6-d7 Re6-e7+ Kd7-c6 Re3-e6+ Kc6-d5 Re6-e5+ Kd5-d4 Re5-e4+
Kd4-c5 Re4-e2) -0.86/9 1} 39. R6e4+ {(Re6-e4+ Kd4-c5 Re4-e5+ Kc5-c6 Re5-h5
Rg8-g6 Kg3-f4 Rb1-d1 g4-g5 Kc6-c5 Rh5-h7 Rg6-d6 Re3-e5+ Kc5-c6) +0.86/10 1}
Kc5 {(Kd4-c5 Re4-e5+ Kc5-c6 g4-g5 Rb1-g1+ Kg3-f4 Rg1-g2 Re5-f5 Rg8-d8
Re3-e6+ Kc6-d7 Rf5-d5+ Kd7xe6 Rd5xd8) -0.88/10 2} 40. Re5+ {(Re4-e5+ Kc5-c6
Re5-h5 Rg8-g6 Kg3-f4 Rb1-d1 g4-g5 Rd1-d5 Re3-e8 Kc6-c5 Re8-e7 Rd5-d4+
Kf4-f5) +0.77/10 2} Kc6 {(Kc5-c6 g4-g5 Rb1-g1+ Kg3-f4 Rg1-g2 Re5-f5 Rg8-d8
Re3-e6+ Kc6-d7 Rf5-d5+ Kd7xe6 Rd5xd8) -0.88/9 2} 41. Rh5 {(Re5-h5 Rg8-g6
Kg3-f4 Rb1-d1 g4-g5 Rd1-d5 Re3-e8 Rd5-d3 Kf4-f5 Kc6-d7) +0.83/10 2} Rg6
{(Rg8-g6 Kg3-f4 Rb1-d1 g4-g5 Rd1-d5 Re3-e8 Kc6-d6 Re8-d8+ Kd6-c6 Rd8-c8+
Kc6-d7) -0.79/9 2} 42. a4 {(a3-a4 b5-b4 Rh5-b5 Kc6-d7 Re3-e4 Rg6-c6 Rb5-d5+
Kd7-c8 Rd5-d4 Rb1-c1 Re4-e8+ Kc8-b7 f3-f4 Rc1-g1+ Kg3-f3) +0.74/11 2} b4
{(b5-b4 Rh5-b5 Kc6-d7 Re3-e4 Rg6-c6 Rb5-d5+ Kd7-c7 a4-a5 c4-c3 Re4-e7+
Kc7-c8) -0.83/9 1} 43. Rb5 {(Rh5-b5 Kc6-d7 a4-a5 Rg6-c6 f3-f4 b4-b3 f4-f5
c4-c3 Rb5-d5+ Kd7-c8 Re3-e8+ Kc8-b7 g4-g5) +0.61/11 2} Kd7 {(Kc6-d7 Re3-e4
Rg6-c6 Rb5-d5+ Kd7-c7 Rd5-d4 Rb1-c1 a4-a5 b4-b3 Re4-e7+ Kc7-c8) -0.71/10 2}
44. Re4 {(Re3-e4 Rg6-c6 a4-a5 b4-b3 a5-a6 Rc6xa6 Re4xc4 b3-b2 Kg3-f2 Ra6-d6
Rb5-e5) +0.50/10 2} Rc6 {(Rg6-c6 a4-a5 b4-b3 a5-a6 Rc6xa6 Re4xc4 b3-b2
Kg3-f2 Ra6-d6 Rb5-e5) -0.50/9 2} 45. Rb7+ {(Rb5-b7+ Kd7-d6 Rb7-h7 c4-c3
a4-a5 Rc6-c5 Rh7-h6+ Kd6-d5 a5-a6 Rb1-g1+ Kg3-f2 c3-c2 Rh6-h5+ Kd5-d6 a6-a7
Rg1-a1 Rh5-h6+ Kd6-c7) +0.35/10 2} Kd6 {(Kd7-d6 Re4-f4 Kd6-e6 g4-g5 Rb1-g1+
Kg3-f2 Rg1xg5 Rf4-e4+ Rg5-e5 Re4xe5+ Ke6xe5 Rb7-b5+ Ke5-d4 Rb5xb4) -0.33/10
2} 46. Rf4 {(Re4-f4 Kd6-e6 g4-g5 Rb1-g1+ Kg3-f2 Rg1xg5 Rf4-e4+ Ke6-f6
Rb7xb4 c4-c3 Re4-f4+ Kf6-e6 Rf4-h4) +0.17/11 2} Ke6 {(Kd6-e6 a4-a5 b4-b3
a5-a6 Rc6xa6 Rf4xc4 Ke6-d5 Rc4-c8 b3-b2 Kg3-f4) -0.31/9 1} 47. Rh7 {(Rb7-h7
c4-c3 Rf4-e4+ Ke6-d5 Rh7-h5+ Kd5-d6 a4-a5 Rc6-c5 Rh5-h6+ Kd6-d7 Re4-d4+
Kd7-c7 Rh6-h7+ Kc7-c6 a5-a6 b4-b3) +0.28/10 2} c3 {(c4-c3 Rf4-e4+ Ke6-d6
a4-a5 Rc6-c8 Rh7-h6+ Kd6-d7 Re4-d4+ Kd7-e7 Rh6-h7+ Ke7-e6 a5-a6 c3-c2
Rd4-e4+ Ke6-d5 Rh7-h5+ Kd5-d6) -0.18/9 1} 48. Rh6+ {(Rh7-h6+ Ke6-d7 Rf4-f7+
Kd7-e8 Rh6xc6 Ke8xf7 a4-a5 Kf7-e7 a5-a6 Ke7-d7 Rc6-c4 Rb1-a1 Kg3-f4 Ra1xa6
Rc4xb4) +0.31/11 2} Kd7 {(Ke6-d7 Rf4-f7+ Kd7-e8 Rh6xc6 Ke8xf7 a4-a5 Rb1-a1
a5-a6 Ra1-a2 Kg3-f4) -0.42/9 0} 49. Rh7+ {(Rh6-h7+ Kd7-e6) 0.00/12 2} Ke6
{(Kd7-e6) 0.00/11 1} 50. Re4+ {(Rf4-e4+ Ke6-d5 Rh7-h5+ Kd5-d6 a4-a5 Rc6-c5
Rh5-h6+ Kd6-d7 a5-a6 c3-c2 Rh6-h7+ Kd7-d6 a6-a7 Rb1-a1 Rh7-h6+ Kd6-d5
Rh6-h5+ Kd5-d6) +0.13/9 1} Kd6 {(Ke6-d6 a4-a5 Rc6-c8 Rh7-h6+ Kd6-d7 Rh6-h2
Rc8-a8 Rh2-h7+ Kd7-c6 Rh7-h6+ Kc6-b5 Re4-e5+ Kb5-c4) -0.23/9 1} 51. Kf4
{(Kg3-f4 Rc6-c5 Rh7-h6+ Kd6-d7 Re4-d4+ Kd7-c7 Rh6-h7+ Kc7-c6 Rh7-h6+
Kc6-c7) 0.00/10 3} Rc5 {(Rc6-c5 Rh7-h6+ Kd6-d7 Re4-d4+ Kd7-e7 Rh6-h7+
Ke7-e8 Rd4-e4+ Ke8-d8 Re4-d4+ Kd8-e8) 0.00/9 1} 52. Rh6+ {(Rh7-h6+ Kd6-d7
Re4-d4+ Kd7-c7 Rh6-h7+ Kc7-c6 Rh7-h6+ Kc6-c7) 0.00/11 1} Kd7 {(Kd6-d7
Re4-d4+ Kd7-c7 Rh6-h7+ Kc7-c6 Rh7-d7 Rc5-a5 Rd4-d6+ Kc6-c5 Rd6-d5+ Kc5-b6
Rd5-d6+ Kb6-c5) 0.00/10 2} 53. Rd4+ {(Re4-d4+ Kd7-c7 Rh6-h7+ Kc7-c6 Rh7-h6+
Kc6-c7) 0.00/12 1} Kc7 {(Kd7-c7 Rh6-h7+ Kc7-b6 Rd4-d6+ Rc5-c6 Rd6xc6+
Kb6xc6 Rh7-h8 Kc6-d5 Rh8-c8 Rb1-a1 Rc8-d8+ Kd5-c4 Rd8-c8+ Kc4-b3 Rc8-a8
Ra1xa4 Ra8xa4 Kb3xa4) +0.74/10 3} 54. Rh7+ {(Rh6-h7+ Kc7-c6 Rh7-d7 Rc5-a5
Rd4-d6+ Kc6-c5 Rd6-d5+ Kc5-b6 Rd7-d6+ Kb6-c7 Rd6-d7+ Kc7-c6 Rd7-d6+ Kc6-c7)
0.00/11 1} Kb6 {(Kc7-b6 Rd4-d6+ Rc5-c6 Rd6xc6+ Kb6xc6 Rh7-h8 Kc6-d5 Rh8-c8
Rb1-a1 Rc8-d8+ Kd5-c4 Rd8-c8+ Kc4-b3 Rc8-a8 Ra1xa4 Ra8xa4 Kb3xa4) +0.74/9
1} 55. Rd6+ {(Rd4-d6+ Rc5-c6 a4-a5+ Kb6-c5 Rd6xc6+ Kc5xc6 Rh7-h8 Kc6-b5
Rh8-c8 Kb5xa5 g4-g5 Rb1-g1 Rc8-a8+ Ka5-b5 Ra8-a2) -0.82/10 2} Rc6 {(Rc5-c6
a4-a5+ Kb6-c5 Rd6xc6+ Kc5xc6 Rh7-h8 Kc6-b7 Rh8-h7+ Kb7-a6 Rh7-c7 Ka6xa5
g4-g5 Rb1-e1) +0.79/9 0} 56. a5+ {(a4-a5+ Kb6-c5 Rd6xc6+ Kc5xc6 Rh7-h8
Rb1-a1 g4-g5 Kc6-d7 Rh8-h2 b4-b3 Rh2-h7+ Kd7-c6 Rh7-h6+ Kc6-c5 g5-g6
Ra1-a4+ Kf4-e5 Ra4xa5) -1.15/11 1} Kc5 {(Kb6-c5 Rd6xc6+ Kc5xc6 Rh7-h8
Kc6-b5 Rh8-c8 Kb5xa5 g4-g5 Rb1-g1 Rc8-a8+ Ka5-b5 Ra8-a2) +0.82/10 1} 57.
Rxc6+ {(Rd6xc6+ Kc5xc6 Rh7-h8 Kc6-b5 Rh8-c8 Rb1-g1 Kf4-e4 Rg1-g2 Ke4-d3
Rg2-d2+ Kd3-e4 Kb5xa5 Rc8-a8+ Ka5-b5 g4-g5) -0.97/12 1} Kxc6 {(Kc5xc6
Rh7-h8 Kc6-b7 Rh8-h7+ Kb7-a6 Rh7-c7 Ka6xa5 g4-g5 Ka5-b6 Rc7-c8 Rb1-e1)
+0.94/9 0} 58. Rh8 {(Rh7-h8 Rb1-a1 a5-a6 Kc6-d5 Rh8-d8+ Kd5-c4 Rd8-c8+
Kc4-b3 g4-g5 Ra1xa6 Kf4-e4 c3-c2 Ke4-d3 Ra6-d6+ Kd3-e3) -1.24/11 1} Kd7
{(Kc6-d7 Rh8-h7+ Kd7-d6 Rh7-h6+ Kd6-d5 Rh6-h5+ Kd5-c4 Rh5-h7 c3-c2 Kf4-e4
c2-c1Q Rh7-c7+ Kc4-b5 Rc7xc1 Rb1xc1 g4-g5 Kb5xa5) +3.60/10 1} 59. Rh7+
{(Rh8-h7+ Kd7-d6 Rh7-h6+ Kd6-d5 Rh6-h5+ Kd5-d4 Rh5-h2 b4-b3 Rh2-h8 c3-c2
Rh8-d8+ Kd4-c3 Rd8-c8+ Kc3-b2 g4-g5 c2-c1Q+ Rc8xc1 Rb1xc1 a5-a6 Rc1-c6
Kf4-f5 Rc6xa6 g5-g6) -7.85/15 24} Kd6 {(Kd7-d6 Rh7-h6+ Kd6-d5 Rh6-h5+
Kd5-c4 Rh5-h7 c3-c2 Rh7-c7+ Kc4-d3 Rc7-d7+ Kd3-e2 Rd7-e7+ Ke2-f2 Re7-c7
c2-c1Q+ Rc7xc1 Rb1xc1 Kf4-e4 b4-b3 Ke4-d3 Kf2xf3) +4.56/11 1} 60. Rh6+
{(Rh7-h6+ Kd6-d5 Rh6-h5+ Kd5-c4 Rh5-h7 c3-c2 Rh7-c7+ Kc4-d3 Kf4-g3 c2-c1Q
Rc7-d7+ Kd3-c4 Rd7-c7+ Kc4-b5 Rc7xc1 Rb1xc1 a5-a6 Kb5xa6 g4-g5 b4-b3)
-8.71/14 12} Kd5 {(Kd6-d5 Rh6-h5+ Kd5-c4 Rh5-h7 c3-c2 Rh7-c7+ Kc4-d3
Rc7-d7+ Kd3-e2 Rd7-e7+ Ke2-f2 Re7-c7 c2-c1Q+ Rc7xc1 Rb1xc1 a5-a6 b4-b3
a6-a7 Rc1-c4+ Kf4-e5 Rc4-c8) +5.93/11 1} 61. Rh5+ {(Rh6-h5+ Kd5-c4 Rh5-h7
c3-c2 Rh7-c7+ Kc4-d3 Kf4-g3 c2-c1Q Rc7-d7+ Kd3-c4 Rd7-c7+ Kc4-b5 Rc7xc1
Rb1xc1 a5-a6 Kb5xa6 g4-g5 b4-b3) -8.71/13 6} Kc4 {(Kd5-c4 Rh5-h7 c3-c2
Rh7-c7+ Kc4-d3 Rc7-d7+ Kd3-e2 Rd7-e7+ Ke2-f2 Re7-c7 c2-c1Q+ Rc7xc1 Rb1xc1
a5-a6 b4-b3 a6-a7 Rc1-c4+ Kf4-e5 Rc4-c8) +5.93/11 1} 62. Rh7 {(Rh5-h7 c3-c2
Rh7-c7+ Kc4-d3 Kf4-g3 c2-c1Q Rc7-d7+ Kd3-c4 Rd7-c7+ Kc4-b5 Rc7xc1 Rb1xc1
a5-a6 Kb5xa6 g4-g5 b4-b3) -8.71/12 3} c2 {(c3-c2 Rh7-c7+ Kc4-d3 Kf4-g3
c2-c1Q Rc7-d7+ Kd3-e3 Rd7-e7+ Ke3-d4 a5-a6 Qc1-g1+ Kg3-f4 Qg1-h2+ Kf4-f5
b4-b3) +8.04/9 0} 63. Rc7+ {(Rh7-c7+ Kc4-d3 Kf4-g3 c2-c1Q Rc7-d7+ Kd3-e2
Rd7-e7+ Ke2-f1 Re7-e5 Qc1-c7 f3-f4 Rb1-b3+ Kg3-h4 Rb3-a3 g4-g5 Ra3xa5)
-8.69/11 1} Kd3 {(Kc4-d3 Kf4-g3 c2-c1Q Rc7-d7+ Kd3-e2 Rd7-e7+ Ke2-f1 Re7-h7
Qc1-e1+ Kg3-f4 Kf1-g2 g4-g5 Qe1-g3+ Kf4-f5 Kg2xf3) +8.61/11 1} 64. Kg3
{(Kf4-g3 c2-c1Q Rc7-d7+ Kd3-e3 Rd7-e7+ Ke3-d4 a5-a6 Qc1-g1+ Kg3-f4 Qg1-h2+
Kf4-f5 b4-b3 g4-g5 Qh2-c2+ Re7-e4+ Kd4-d5) -7.80/9 0} c1=Q {(c2-c1Q Rc7-d7+
Kd3-e2 Rd7-e7+ Ke2-f1 a5-a6 Rb1-b2 Re7-e6 Rb2-g2+ Kg3-h3 Kf1-f2 Re6-e2+
Kf2xe2 Kh3xg2) +9.05/9 0} 65. Rd7+ {(Rc7-d7+ Kd3-e3 Rd7-e7+ Ke3-d4 a5-a6
Qc1-g1+ Kg3-f4 Qg1-h2+ Kf4-f5 b4-b3 g4-g5 Qh2-c2+ Re7-e4+ Kd4-d5) -7.80/8
0} Ke2 {(Kd3-e2 Rd7-e7+ Ke2-f1 a5-a6 Rb1-b2 Re7-e6 Rb2-g2+ Kg3-h3 Kf1-f2
Re6-e2+ Kf2xe2 Kh3xg2) +9.05/9 1} 66. Re7+ {(Rd7-e7+ Ke2-d2 Re7-d7+ Kd2-e3
Rd7-e7+ Ke3-d4 Re7-d7+ Kd4-e5 Rd7-e7+ Ke5-d6 Re7-e2 Qc1-g1+ Kg3-f4) -7.72/7
0} Kf1 {(Ke2-f1 Re7-e4 Rb1-b2 f3-f4 Qc1-c2 Kg3-h4 Qc2xe4 Kh4-g5 Qe4-d5+
f4-f5 Qd5xa5) +13.42/9 1} 67. Re5 {(Re7-e5 Qc1-c7 f3-f4 Rb1-b3+ Kg3-h4
Rb3-a3 Kh4-g5 Ra3xa5) -9.08/7 0} Rb2 {(Rb1-b2 Re5-e6 Rb2-g2+ Kg3-h4 Qc1-f4
Kh4-h5 Rg2-h2+ Kh5-g6 Rh2-h6+ Kg6-g7 Qf4-g5+ Kg7-f8 Rh6-h8+ Kf8-f7 Rh8-h7+
Kf7-f8 Qg5-f4+ Re6-f6 Qf4-b8+) +M10/8 1} 68. f4 {(f3-f4 Qc1-c6 Re5-e1+
Kf1xe1 f4-f5 Rb2-f2 a5-a6 Qc6-d6+ Kg3-h4 Rf2-h2+ Kh4-g5 Qd6-h6+) -M6/9 0}
Qc6 {(Qc1-c6 f4-f5 Rb2-b3+ Re5-e3 Rb3xe3+ Kg3-f4 Qc6-h6+ g4-g5 Qh6-h3 a5-a6
Qh3-f3+) +M6/9 0} 69. f5 {(f4-f5 Rb2-b3+ Re5-e3 Rb3xe3+ Kg3-f4 Qc6-h6+
g4-g5 Qh6-h3 a5-a6 Qh3-g3+) -M5/6 0} Rb3+ {(Rb2-b3+ Re5-e3 Rb3xe3+ Kg3-f4
Qc6-h6+ g4-g5 Qh6-h3 a5-a6 Qh3-g3+) +M5/18 0} 70. Re3 {(Re5-e3 Rb3xe3+
Kg3-f4 Qc6-h6+ g4-g5 Qh6-h3 a5-a6 Qh3-g3+) -M4/6 0} Rxe3+ {(Rb3xe3+ Kg3-f4
Qc6-h6+ g4-g5 Qh6-h3 a5-a6 Qh3-g3+) +M4/36 1} 71. Kf4 {(Kg3-f4 Qc6-h6+
g4-g5 Qh6-h3 a5-a6 Qh3-g3+) -M3/4 0 White resigns} 0-1

Luck?

Null-move is supposed to provide a few hundred Elo (according to Bob, in Crafty it isonlyworth 40 Elo). And the chancesfor beating a 40 Elo stronger opponent are appreciable.

You don't have to modify Fruitfor this, really: standard Fruit has a UCI option to disable null move. Are you sure it was enabled in the unmodified version?