[Event "Source: D. Lewis"]
[Site "?"]
[Date "1935.??.??"]
[Round "?"]
[White "Bogart, Humphrey"]
[Black "NN"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "?"]
[BlackElo "?"]
1.d4 Nf6 2.g4 Nxg4 3.f3 Nf6 4.e4 d6 5.Be3 g6 6.Nc3 Bg7 7.Qd2 Nc6 8.0-0-0 
0-0 9.Bd3 e5 10.d5 Nb4 11.Bc4 a5 12.a3 Na6 13.h4 Nh5 14.Nge2 f5 15.Bg5 
Bf6 16.f4 exf4 17.Nxf4 Nxf4 18.Qxf4 fxe4 19.Bh6 Re8 20.Nxe4 Bg7 21.Bxg7 
Kxg7 22.h5 Bf5 23.hxg6 Bxg6 24.Qh6+ Kg8 25.Rdg1 Qe7 26.Rxg6+ hxg6 27.Qh8+ 
Kf7 28.Rh7+ 1-0

[Event "Opening Adventure 6/64"]
[Site "St.Radegund ?"]
[Date "1960.??.??"]
[Round "?"]
[White "Deimer,E"]
[Black "Wagner"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "?"]
[BlackElo "?"]
1.d4 Nf6 2.g4 Nxg4 3.e4 Nf6 4.e5 Nd5 5.c4 Nb6 6.Nc3 d6 7.a4 dxe5 8.a5 
exd4 9.axb6 dxc3 10.Qxd8+ Kxd8 11.Rxa7 1-0

[Event "Irreg.Openings-Harding"]
[Site "Moscow Team Ch. 1967"]
[Date "1967.??.??"]
[Round "?"]
[White "Bogart, Humphrey"]
[Black "NN"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "?"]
[BlackElo "?"]
1.d4 Nf6 2.g4 d5 3.g5 Ne4 4.f3 Nd6 5.e4 {5.e4 appears to be a bit too 
premature. Better was 5.Nc3 attacking the d5  pawn and supporting the 
e4 pawn thrust.} 5...dxe4 6.fxe4 e5! {Black could have played 6...Nxe4 
winning a pawn but White could have compensation with 7.Bg2 Nd6 etc.}
 7.dxe5 Nxe4 8.Qxd8+ Kxd8 {There appears to be still a lot of play left 
on both sides. David Bronstein  might not have liked his shattered pawn 
structure and a difficult endgame.}  1/2-1/2

[Event "Match  vs Takata"]
[Site "?"]
[Date "1982.10.10"]
[Round "?"]
[White "Nakamura,C"]
[Black "Takata,Reynolds"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "?"]
[BlackElo "?"]
1.d4 Nf6 2.g4 d5 3.g5 Ne4 4.f3 Nd6 5.Nc3 c6 6.e4 dxe4 7.fxe4 g6 8.Be3 Bg7 
9.Bd3 Na6 10.a3 Nc7 11.Qf3 {There was a question on where I should have 
developed my Queen. 11.Qf3 was  the most aggressive line.} 11...Be6 
12.0-0-0 Qd7 13.Nge2 Nc4 14.d5 Bg4 {Not 14...cxd5 because 15.Bxc4 drops 
a N.} 15.dxc6 Qxc6 {If 15...Bxf3 16.cxd7+ (16...Kf8 17.Bxc4 threatening 
d8 queen) Kxd7 17.Bxc4+  and White is up a N.} 16.Qf2 Bxe2 17.Bxe2 
Nxb2 18.Rdf1 {If 18.Kxb2 Qxc3+ 19.Kc3 Qb2+ 20.Kd2 Bc3+ 21.Kd3 0-0-0+ and 
White drops at  least a piece or gets mated.} 18...Qxc3? 19.Qxf7+ Kd8 
20.Bc5! Qe5 {Black does not play 20...Qxc5 because he loses his material 
advantage to  21.Qxg7 Re8 22.Kxb2} 21.Bxe7+ Kc8 {21...Qxe7 is bad 
because of 22.Rfd1+ Nxd1 23.Rxd1+ and black drops the Q.} 22.Bd6 Qc3 
{Black could have played 22.Qxd6 and give back the piece and shut down 
White's  tactical shots with a slightly inferior game, but decided to 
retain the   material advantage which was fatal.} 23.Bg4+ Kb8 24.Rf3 
Qc4 25.Qxg7 Rd8 26.Rc3 1-0

[Event "National Open '83"]
[Site "Las Vegas"]
[Date "1983.03.17"]
[Round "?"]
[White "Nakamura,C"]
[Black "Vasquez,Enrique"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "?"]
[BlackElo "2005"]
1.d4 Nf6 2.g4 Nxg4 3.e4 d6 4.Be2 Nf6 5.Nc3 Nbd7 6.Be3 e6 7.Qd2 a6 8.0-0-0 
b5 9.a3 Bb7 10.d5 Nxe4?! {Black made a strategic mistake. He starts to 
open up the center when his  pieces are much less developed.} 11.Nxe4 
exd5 12.Bg5! f6 13.Nxf6+! Nxf6 14.Bh5+ g6 15.Re1+ Kd7 16.Bg4+ Nxg4 
{16...Kc3 17.Qc3+ Kb6 18.Bxf6 d4 19.Qxd4+ c5 20.Bxd8+ should win.} 
17.Bxd8 Rxd8 18.Qd4 Bh6+ 19.Kb1 Ne5 20.Qh4 d4 21.f3 Be3 22.c3 c5 23.cxd4 
Bxd4 24.Ne2 Nxf3 25.Qh3+ Kc7 26.Nxd4 Nxd4 27.Re7+ Kb6 28.Rhe1 Bc8 29.Qe3 
Bf5+ 30.Ka2 d5 31.Qg3 Rc8 32.Qe5 Nc6 33.Qf6 Rhf8 34.Rf7 Rxf7 35.Qxf7 d4 
36.Qxh7 d3 37.Qh6 Rd8 38.Qe3 Nd4 39.b4 c4 {Not good was 39...Nc2 
40.Qxc5+ Kb7 41.Re7+ (41...Kb8 or 41...Ka8 leads to  mate, 41...Rd7 
drops the pawn at d3, 41...Bd7 also drops the pawn at d3)} 40.a4 c3 
41.Qe7! Be6+ 42.Rxe6+ Nxe6 43.a5+ Kc6 44.Qxe6+ Rd6 45.Qc8+ Kd5 46.Qxc3 
Ke4 47.Qd2 Rd4 48.Qg2+ Ke3 49.Qg3+ Kd2? 50.Qg2+ Ke3 51.Qg3+ Kd2? {Up 
until Black's last error the game was still very close. It was still
very  difficult to win this game.} 52.Qf2+ 1-0

[Event "GWG Thematurnier 1984"]
[Site "30 min. partien"]
[Date "1984.??.??"]
[Round "?"]
[White "Druke"]
[Black "Becker"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "?"]
[BlackElo "?"]
1.d4 Nf6 2.g4 d5 3.g5 Ne4 4.Nf3 c5 5.c3 Nc6 6.Bf4!! Qb6 7.Nbd2 Qxb2 
8.Nxe4 dxe4 9.d5 exf3 10.dxc6 fxe2? {Black got a little too greedy. Now 
White develops another piece.} 11.Bxe2 Qxc3+ 12.Bd2 Qe5 {Black had 
other possible Q moves such as 12....Qa3 13.cxb7 Bxb7 14.Bb5+  Kc8 
15.Ba5+ Kc8 16.Qd8+mate, but they all seem to lose.} 13.cxb7 Bxb7 
14.Qa4+ Kd8 15.Ba5+ Qc7 {If 15...Kc8 16.Qd8+mate.} 16.Rd1+ Kc8 17.Qe8+ 
1-0

[Event "Hi St. Champ Qual '84"]
[Site "?"]
[Date "1984.??.??"]
[Round "?"]
[White "Nakamura,C"]
[Black "Tsoy,Victor"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "?"]
[BlackElo "2200"]
1.d4 Nf6 2.g4 Nxg4 3.e4 d6 4.Be2 Nf6 5.Nc3 c5 6.Nf3 cxd4 7.Nxd4 g6 8.Be3 
Bg7 9.Qd2 Nc6 10.0-0-0 Nxd4 11.Bxd4 a6 12.f3 Be6 13.Nd5 Bxd5 14.exd5 Rc8 
15.Kb1 Qc7 16.c4 h5 17.Qe3 h4 18.Rhe1 Nh5 19.Bf1 Bxd4 20.Qxd4 0-0 21.Bd3 
Nf6 {Black's kingside is very weak and there is no real counterplay on 
the Queen  side.} 22.Rg1 b5 23.Qxh4 bxc4? {23...Kg7 should have been 
played. It appears that Black under estimated  the Bishop sac on g6.} 
24.Bxg6! fxg6 25.Qh6! {Black expected 25.Rxg6+ and 25...Kf7 should 
escape the king side attack.} 25...e5 26.Rxg6+ Kf7 27.Rxf6+ Ke7 28.Qg7+ 
1-0

[Event "Quad Tournament"]
[Site "?"]
[Date "1986.03.29"]
[Round "?"]
[White "Nakamura,C"]
[Black "Oshima,Daniel"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "?"]
[BlackElo "1815"]
1.d4 Nf6 2.g4 e5 {The "Oshima" variation of the Gibbins-Weidenhagen 
Gambit. Daniel Oshima had  studied this variation extensively and is 
said to have created a mini booklet.} 3.dxe5 Nxg4 4.Nf3 Bc5 5.e3 Nc6 
6.Nc3 Ngxe5 7.Nxe5 Nxe5 8.Qh5 d6 9.Be2 g6? {A key error. Now the dark 
squares f6, g7 and h6 become very weak.} 10.Qh6 Qf6? 11.f4 Ng4 12.Bxg4 
Bxg4 13.Nd5! Qd8 14.b4! Bb6? {14...c6 15.Bb2 was better.} 15.Bb2! Bh5 
16.Nf6+ Ke7 17.Nxh5 Ke6 18.0-0-0 Qf8 19.Bg7 Qe8 20.f5+ Kxf5 21.Qf4+ 1-0

[Event "Dick Dole Memorial"]
[Site "?"]
[Date "1995.02.19"]
[Round "4"]
[White "Nakamura,C"]
[Black "Rubsamen,Rogelio"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2105"]
[BlackElo "2000"]
1.d4 Nf6 2.g4 {The "Gibbins-Weidenhagen Gambit".} 2...Nxg4 3.e4 d5 
4.Be2 Nf6 5.e5 Nfd7 6.e6 fxe6 {White is 2 pawns down, but Black is 
really tied down. For a long time I had  thought that White's game was 
unsound. But recent practice games with my  Chess Programs has proven 
that White has good winning chances.} 7.Bd3 {The other option was to 
play the Q to d3 then g3 with other moves such as  Bf4 and h4, if Black 
decides to castle kingside.} 7...Nf6 8.Nf3 b6 9.Qe2 {9.Qe2 had a 
twofold function. 1. To prevent Black from playing Ba6 exchanging  my 
attacking Bishop. 2. To attack the weak point at e6.} 9...Nc6 10.c3 Bb7 
11.Bf4 {I could have played 11.Qxe6 but Black could free his game by 
exchanging   Queens. The other interesting move was 11.Ng5 which 
required exact calculation. I opted instead to further develop my 
pieces.} 11...Nh5 12.Bg3 Nxg3 13.hxg3 Qd6 14.Rxh7 Rxh7 15.Bg6+ {15.Bg6+ 
played to prevent normal castling.}  15...Kd7 16.Bxh7 g6! {Black's last 
move was played to give back the pawn to free his game.   Otherwise the 
B at f8 could be trapped at f8.} 17.Bxg6 Bg7 18.Ng5? {This was too 
dangerous. 18.Nbd2 was much safer. I got too greedy. I saw  a chance to 
win the Black Q at d6 by playing my N to f7. Also if Black  played 
18...e5 then I had some tricks with 19.Bf5+ Ke8 20.Qh5+ etc.} 18...Rh8! 
19.Nd2 Nxd4! {The first shock! I did not expect this N sacrifice. 20.Qf1 
or 20.Qe3 were  not possible because of 20...Nc7+.} 20.cxd4 Rh1+ 
21.Nf1 Qb4+ 22.Kd1 Qxd4+ 23.Ke1 {23.Kc1 was not possible because of 
23...Rxf1+ 24.Qxf1 Qxb2+. 23.Kc2 also  not possible because of 
23...Qxb2+.} 23...Qb4+ 24.Kd1 {At this point I already accepted the 
fact that this game would be drawn  by perpetual check.} 24...Qa4+ 
{Black could have tried for a draw with perpetual check with 24...Qd4+ but
  tried for the win instead.} 25.Kc1 Kc8 26.Bc2 Qd4 27.Rb1 Bh6 28.f4 
e5! 29.Ne6! Qg1 30.Kd2 exf4 31.gxf4 d4 32.Bf5 Kb8 33.Bd3 Bd5 34.Kc2 Qg8 
35.Nxd4 Bxa2 36.Qf3! Bxb1+? {Best was 36...Bd5 to slow down White's 
attack on the a8-h1 diagonal. However  after 36...Bd5 White had 37.Be4 
playing for control of the diagonal.} 37.Kxb1 Rg1 {37...Qg1 was also 
loses to 38.Nc6+ Kb7 39.Nb4+ Kb8 40.Na6+ Kc8 41.Bf5+ e6   42.Bxe6+ Kd8 
43.Qd5+ Ke8 44.Qd7+ Kf8 45.Qf7+mate.} 38.Nc6+ {The Q drops with either 
38...Kc8 39.Nxe7+ or with 38...Kb7 39.Nxe7+} 1-0

[Event "2 Game Match"]
[Site "Game 30"]
[Date "1995.10.12"]
[Round "2"]
[White "Nakamura,C"]
[Black "Felber,Joseph"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2100"]
[BlackElo "2120"]
1.d4 Nf6 2.g4 d5 3.g5 Ne4 4.f3 Nd6 5.Nc3 c6 6.e4 g6 7.Be3 Be6 8.Qd2 Bg7 
9.0-0-0 b5 10.exd5 Bxd5 11.Nxd5 cxd5 12.h4 Nc6 13.h5 gxh5 14.Rxh5 Nc4 
15.Bxc4 {15.Bxc4 was forced since I could not allow Black to post a N on 
a key   strategic square.} 15...bxc4 16.c3 Qa5 17.a3 Qb5 18.Qc2 Rb8 
19.Rd2 {19.Rd2 played to further guard my b2 square.} 19...Na5 20.Rdh2 
Nb3+ 21.Kb1 h6 22.g6 Rf8 23.Bxh6 Bxh6 24.Rxh6 Kd7 25.g7 Rg8 26.Qf5+ Kc7 
27.Qxf7 Qd7 28.Re2 Rxg7 {An very tricky R sac, but it was unsound.} 
29.Qxg7 Qf5+ 30.Rc2! {This move is the key to White's defense.} 30...
Nd2+ 31.Ka2! {Black cannot play 31...Qxc2 because 32.Qxe7+ Kc8 33.Rh8+
mate.} 31...Qd7 32.Rxd2 Kb7 33.Re2 Ka8 34.Rh8 {Black had no more
counter play. White had only a minute left on the clock  but this 
should be no problem.} 1-0

