[Event "New York State-ch 123rd"]
[Site "Rochester"]
[Date "2001.09.03"]
[Round "5"]
[White "Katrein, Matthew R"]
[Black "Felber, Joseph J"]
[Result "1-0"]
[ECO "A34"]
[BlackElo "2123"]
[PlyCount "101"]
[EventDate "2001.09.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 084 Extra"]
[Source "ChessBase"]
[SourceDate "2001.10.26"]
[SourceVersion "1"]
[SourceVersionDate "2001.10.26"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7 6. Nf3 Nc6 7. d3 e5 8. 0-0 Be7 9. Be3 Rb8 10. Nd2 Qd7 11. Nc4 f6 12. a4 b6 13. Qb3 Nd4 14. Bxd4 exd4 15. Nb5 Bb7 16. Nxa7 Bxg2 17. Kxg2 Qd5+ 18. Kg1 0-0 19. Nb5 Ne6 20. Nd2 Qc6 21. Rfc1 Kh8 22. Nf3 Qd7 23. Na3 Rfe8 24. Nc4 Qd5 25. Ra3 Qb7 26. Qa2 Bf8 27. Rb3 Qc7 28. Rb5 Nd8 29. b4 Nc6 30. bxc5 bxc5 31. Rxb8 Rxb8 32. a5 Nb4 33. Qa4 Nd5 34. Ra1 Nc3 35. Qc2 Re8 36. e4 f5 37. e5 Qc6 38. Nh4 f4 39. Re1 Qh6 40. f3 Be7 41. Nf5 Qg5 42. Ncd6 Bxd6 43. Nxd6 Re7 44. Qc1 h6 45. Qxf4 Qxf4 46. gxf4 Nd5 47. Ra1 Ra7 48. f5 Nb4 49. e6 Nxd3 50. Nb5 Ra8 51. Nc7 1-0

[Event "New York State-ch 123rd"]
[Site "Rochester"]
[Date "2001.09.02"]
[Round "4"]
[White "Binet Tapaszto, Laszlo"]
[Black "Katrein, Matthew R"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2254"]
[PlyCount "47"]
[EventDate "2001.09.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 084 Extra"]
[Source "ChessBase"]
[SourceDate "2001.10.26"]
[SourceVersion "1"]
[SourceVersionDate "2001.10.26"]
[SourceQuality "1"]

1. d4 f5 2. h3 d6 3. g4 fxg4 4. hxg4 Bxg4 5. Qd3 Qd7 6. Rxh7 Rxh7 7. Qxh7 Qe6 8. Bh3 Nf6 9. Qg6+ Qf7 10. Qxf7+ Kxf7 11. f3 Bd7 12. e4 e5 13. d5 c6 14. c4 cxd5 15. exd5 Na6 16. Be3 Nb4 17. Kd2 Rc8 18. Nc3 a5 19. a3 Na6 20. Na4 Nc5 21. Bxc5 dxc5 22. Nb6 Bxh3 23. Nxh3 Rd8 24. Ng5+ 1-0

[Event "New York State-ch 123rd"]
[Site "Rochester"]
[Date "2001.09.01"]
[Round "2"]
[White "Katrein, Matthew R"]
[Black "Stenzel, Harold G"]
[Result "1-0"]
[ECO "E61"]
[BlackElo "2139"]
[PlyCount "67"]
[EventDate "2001.09.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 084 Extra"]
[Source "ChessBase"]
[SourceDate "2001.10.26"]
[SourceVersion "1"]
[SourceVersionDate "2001.10.26"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 0-0 6. d4 Re8 7. 0-0 e5 8. d5 Nb8 9. d6 cxd6 10. Qxd6 Re6 11. Qd1 Nc6 12. Ng5 Re8 13. Nd5 d6 14. h4 Nd4 15. e3 Ne6 16. Nxf6+ Bxf6 17. Ne4 Be7 18. b3 f5 19. Nc3 Nc7 20. Ba3 Rf8 21. Nd5 Nxd5 22. Qxd5+ Kg7 23. Rad1 Rf6 24. c5 Qa5 25. Bb2 Qc7 26. f4 Re6 27. Rc1 Kf6 28. cxd6 Qxd6 29. Rfd1 Qb6 30. Bxe5+ Kf7 31. Bd4 Qa6 32. Rc7 Kf8 33. Bc5 Bxc5 34. Qxc5+ 1-0

[Event "New York State-ch 123rd"]
[Site "Rochester"]
[Date "2001.09.01"]
[Round "1"]
[White "Lam, Daniel King Wai"]
[Black "Katrein, Matthew R"]
[Result "0-1"]
[ECO "B23"]
[PlyCount "66"]
[EventDate "2001.09.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 084 Extra"]
[Source "ChessBase"]
[SourceDate "2001.10.26"]
[SourceVersion "1"]
[SourceVersionDate "2001.10.26"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 e6 6. Bxc6 dxc6 7. d3 Ne7 8. 0-0 0-0 9. Qe1 Bd7 10. Be3 b6 11. Qh4 Nc8 12. Qg3 Nd6 13. f5 Nb5 14. Nxb5 cxb5 15. fxg6 fxg6 16. Ng5 Qe7 17. Qh3 Bxb2 18. Rxf8+ Rxf8 19. Rb1 Bf6 20. Qg3 b4 21. e5 Bg7 22. Ne4 Ba4 23. Rc1 Rf5 24. Bf4 Qf8 25. Nf6+ Bxf6 26. exf6 Qxf6 27. Bb8 Bc6 28. Bxa7 Qd4+ 29. Kh1 Qd5 30. Rg1 Qxa2 31. Bxb6 Qxc2 32. Qb8+ Rf8 33. Qd6 Qxg2+ 0-1

[Event "corr"]
[Site "corr"]
[Date "1997.??.??"]
[Round "?"]
[White "Katrein, Matthew R"]
[Black "Green, Wesley C"]
[Result "0-1"]
[ECO "D48"]
[PlyCount "68"]
[EventDate "1997.06.04"]
[EventType "match (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. d5 Qc7 11. dxe6 fxe6 12. 0-0 Bb7 13. Bc2 Bd6 14. Qe2 0-0 15. Bg5 Ne5 16. Nxe5 Bxe5 17. f4 Bd4+ 18. Kh1 b4 19. Nd1 Qf7 20. Bxf6 Qxf6 21. Ne3 Bxb2 22. Rab1 Bd4 23. f5 Kh8 24. Rf3 a5 25. Bd3 Rae8 26. Rbf1 Qe7 27. fxe6 Rxf3 28. Qxf3 Qxe6 29. Nd5 Rd8 30. Bc4 h6 31. h3 Ba6 32. Bxa6 Qxa6 33. Qf7 Qc4 34. Rf3 Qxa2 0-1

[Event "New York State-ch"]
[Site "Saratoga"]
[Date "1995.??.??"]
[Round "5"]
[White "Katrein, Matthew R"]
[Black "Ying, Victor"]
[Result "1-0"]
[ECO "A29"]
[PlyCount "79"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. 0-0 Be7 8. d3 0-0 9. Be3 Be6 10. a3 f5 11. Na4 Nxa4 12. Qxa4 Bf6 13. Rac1 Nd4 14. Nxd4 exd4 15. Bf4 c6 16. b4 Bd5 17. Bxd5+ Qxd5 18. Rc5 Qe6 19. b5 cxb5 20. Qxb5 Qxe2 21. Rxf5 Rac8 22. Qxb7 Qxd3 23. Rxf6 gxf6 24. Bh6 Qg6 25. Bxf8 Rxf8 26. Qd5+ Qf7 27. Qxd4 Qe7 28. a4 Rd8 29. Qg4+ Kh8 30. Rc1 Qe5 31. h4 f5 32. Qc4 Qf6 33. Qf4 Qe6 34. Kh2 Qe4 35. Qxe4 fxe4 36. Rc7 Rd2 37. Kg1 Rd1+ 38. Kg2 Rd2 39. Kf1 Rd1+ 40. Ke2 1-0

[Event "World op 19th"]
[Site "Philadelphia"]
[Date "1991.??.??"]
[Round "1"]
[White "Ivanov, Alexander"]
[Black "Katrein, Matthew R"]
[Result "1-0"]
[ECO "C05"]
[WhiteElo "2565"]
[PlyCount "29"]
[EventDate "1991.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. c3 c5 6. f4 Nc6 7. Ngf3 Be7 8. Bd3 0-0 9. h4 f6 10. Bxh7+ Kxh7 11. Ng5+ fxg5 12. hxg5+ Kg8 13. Qh5 Rf5 14. g4 Ndxe5 15. dxe5 1-0

[Event "World op 19th"]
[Site "Philadelphia"]
[Date "1991.??.??"]
[Round "?"]
[White "Katrein, Matthew R"]
[Black "Berman, M."]
[Result "1/2-1/2"]
[ECO "E92"]
[PlyCount "65"]
[EventDate "1991.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 g6 3. Nc3 Bg7 4. d4 0-0 5. e4 d6 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 c6 10. Nxe5 Re8 11. f4 h6 12. Bh4 g5 13. fxg5 hxg5 14. Bg3 Nxe4 15. Nxe4 Bxe5 16. 0-0-0 Nd7 17. Bxe5 Rxe5 18. Bf3 Nb6 19. b3 Kg7 20. h3 Be6 21. Rd6 Re8 22. Rhd1 Re7 23. Rd8 Nc8 24. Ng3 f5 25. R1d4 Nb6 26. Nh5+ Kg6 27. Rf8 Nd7 28. Rd8 Re3 29. Rh8 Ne5 30. Bd1 Rd7 31. Rxd7 Bxd7 32. Rg8+ Kh6 33. Rh8+ 1/2-1/2

[Event "World op 19th"]
[Site "Philadelphia"]
[Date "1991.??.??"]
[Round "2"]
[White "Katrein, Matthew R"]
[Black "Prieto Cabal, Angel"]
[Result "1/2-1/2"]
[ECO "A89"]
[PlyCount "97"]
[EventDate "1991.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. d4 0-0 6. 0-0 d6 7. Nc3 Nc6 8. d5 Ne5 9. Nxe5 dxe5 10. e4 f4 11. gxf4 exf4 12. Bxf4 Nxe4 13. Be3 Nxc3 14. bxc3 Bxc3 15. Rc1 Bg7 16. Re1 a5 17. Bg5 Bf6 18. Bxf6 Rxf6 19. Qe2 Kf8 20. Rc3 Qd6 21. Re3 Rf7 22. Qb2 Kg8 23. Qd4 b6 24. Qh4 Kf8 25. c5 bxc5 26. Qh6+ Kg8 27. Qh4 Rb8 28. Rxe7 Rxe7 29. Rxe7 Rb1+ 30. Bf1 h5 31. Re8+ Kf7 32. Rxc8 Rxf1+ 33. Kxf1 Qa6+ 34. Ke1 Qxc8 35. Qf4+ Kg8 36. Qf6 Qe8+ 37. Kd2 Qf7 38. Qd8+ Kg7 39. Kd3 Kh6 40. h4 Qg7 41. Qg5+ Kh7 42. Qf4 Qd7 43. Qe5 Qd6 44. f4 Qd7 45. Kc4 Qa4+ 46. Kxc5 Qc2+ 47. Kb5 a4 48. Qe7+ Kg8 49. Qe8+ 1/2-1/2

[Event "World op 19th"]
[Site "Philadelphia"]
[Date "1991.??.??"]
[Round "?"]
[White "Salomon, Miguel A"]
[Black "Katrein, Matthew R"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "2320"]
[PlyCount "71"]
[EventDate "1991.07.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 Nc6 4. Be3 e5 5. d5 Nd4 6. Nge2 c5 7. dxc6 dxc6 8. Qd2 Be6 9. Rd1 c5 10. Nd5 Nf6 11. Nxf6+ Bxf6 12. c3 Nxe2 13. Qxe2 Qc7 14. Qb5+ Kf8 15. Qxc5+ Qxc5 16. Bxc5+ Kg7 17. a3 Bb3 18. Rd7 b6 19. Be3 Rhd8 20. Rxd8 Rxd8 21. Be2 Bc2 22. f3 Bh4+ 23. g3 Be7 24. Kf2 Bb3 25. Rc1 Bc5 26. Bxc5 bxc5 27. Ke1 Rb8 28. Kd2 Rd8+ 29. Ke3 a5 30. Bb5 c4 31. Bc6 Rd3+ 32. Ke2 f5 33. Rf1 f4 34. gxf4 exf4 35. Bd5 g5 36. Re1 1/2-1/2

[Event "World op 18th"]
[Site "Philadelphia"]
[Date "1990.??.??"]
[Round "?"]
[White "Katrein, Matthew R"]
[Black "Colias, Billy"]
[Result "1-0"]
[ECO "E63"]
[BlackElo "2290"]
[PlyCount "54"]
[EventDate "1990.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 d6 6. d4 Nc6 7. 0-0 a6 8. b3 Rb8 9. Bb2 b5 10. cxb5 axb5 11. Rc1 Na5 12. Qc2 Bh6 13. Rcd1 Bb7 14. e4 Nc6 15. e5 Nb4 16. Qb1 Nfd5 17. Ne4 Bg7 18. h4 Bc8 19. Rc1 Bf5 20. a3 Na6 21. Nfd2 b4 22. a4 Nc3 23. Qd3 Qc8 24. Bxc3 bxc3 25. Qxc3 c5 26. exd6 Bxd4 27. Qa5 e6 1-0

[Event "World op 18th"]
[Site "Philadelphia"]
[Date "1990.??.??"]
[Round "1"]
[White "Katrein, Matthew R"]
[Black "Sherzer, Alex"]
[Result "0-1"]
[ECO "A21"]
[BlackElo "2440"]
[PlyCount "48"]
[EventDate "1990.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Bb4 3. Qc2 Nf6 4. a3 Bxc3 5. Qxc3 Nc6 6. e3 d5 7. cxd5 Qxd5 8. b4 0-0 9. Bb2 Re8 10. Nf3 Bg4 11. Bc4 Qd7 12. Bb5 Ne4 13. Bxc6 bxc6 14. Qc2 Qf5 15. d3 Bxf3 16. gxf3 Qxf3 17. Rg1 Nf6 18. Rg3 Qd5 19. Ke2 a5 20. Rag1 g6 21. e4 Qb5 22. Qc1 Nxe4 23. Rh3 Nf6 24. Qg5 Nd5 0-1

[Event "World op 18th"]
[Site "Philadelphia"]
[Date "1990.??.??"]
[Round "8"]
[White "McKenna, Geffrey L"]
[Black "Katrein, Matthew R"]
[Result "0-1"]
[ECO "A96"]
[WhiteElo "2240"]
[PlyCount "46"]
[EventDate "1990.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. c4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. 0-0 0-0 6. d4 d6 7. Nc3 a5 8. Qc2 Nc6 9. b3 e5 10. dxe5 dxe5 11. Rd1 Qe8 12. Nb5 Bd8 13. e3 e4 14. Nfd4 Nb4 15. Qd2 Qh5 16. Qe2 Qg6 17. Nc2 f4 18. exf4 Bg4 19. Qd2 Bxd1 20. Qxd1 Be7 21. Nxb4 Bxb4 22. Nxc7 Rad8 23. Qe2 Bc3 0-1

[Event "US Open-83"]
[Site "St Paul"]
[Date "1982.08.20"]
[Round "12"]
[White "Katrein, Matthew R"]
[Black "Johnson, Robert K"]
[Result "1-0"]
[ECO "D34"]
[PlyCount "87"]
[EventDate "1982.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 d5 3. d4 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. 0-0 0-0 9. dxc5 d4 10. Na4 h6 11. b3 Nh7 12. Bb2 Bf6 13. Rc1 Bg4 14. Rc2 Qd7 15. Rd2 Rad8 16. a3 Rfe8 17. b4 Ng5 18. b5 Bxf3 19. exf3 Na5 20. f4 Ne4 21. Re2 Qxb5 22. Bxe4 Nb3 23. Rfe1 Qxa4 24. c6 bxc6 25. Bc2 Rxe2 26. Rxe2 d3 27. Bxf6 gxf6 28. Rd2 Qe4 29. Bxb3 c5 30. Qc1 Kg7 31. Qc4 Qxc4 32. Bxc4 Rd4 33. Bb5 c4 34. Kg2 Kf8 35. Kh3 Ke7 36. Kg4 Ke6 37. Bxc4+ Rxc4 38. Rxd3 Rc2 39. Re3+ Kd7 40. Kh5 Rxf2 41. h4 Rb2 42. Kxh6 Rb6 43. Kg7 f5 44. Kxf7 1-0

[Event "US Open-83"]
[Site "St Paul"]
[Date "1982.08.19"]
[Round "11"]
[White "Katrein, Matthew R"]
[Black "Martz, William E"]
[Result "0-1"]
[ECO "A16"]
[PlyCount "70"]
[EventDate "1982.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6 6. Nf3 Bg7 7. 0-0 0-0 8. d3 Nc6 9. Be3 e5 10. Qd2 Re8 11. h3 Nd4 12. Kh2 Qe7 13. Qc1 c6 14. Ng1 Be6 15. Bg5 f6 16. Bd2 Rac8 17. f4 exf4 18. Bxf4 f5 19. Qd2 Bf7 20. Rae1 Nd5 21. Bg5 Qd6 22. e4 Nf6 23. Nf3 Nh5 24. Bf4 Nxf4 25. Qxf4 Qxf4 26. gxf4 Ne6 27. Kg3 Nc5 28. exf5 Nxd3 29. fxg6 Bxg6 30. Rxe8+ Rxe8 31. Nh4 Nxb2 32. Nxg6 Bxc3 33. Ne5 Bxe5 34. fxe5 Rxe5 35. Rb1 Rg5+ 0-1

[Event "US Open-83"]
[Site "St Paul"]
[Date "1982.08.18"]
[Round "10"]
[White "Gogel, Dennis"]
[Black "Katrein, Matthew R"]
[Result "1/2-1/2"]
[ECO "A10"]
[PlyCount "84"]
[EventDate "1982.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. 0-0 0-0 6. d3 d6 7. Nc3 c6 8. e4 fxe4 9. dxe4 e5 10. c5 Be6 11. Qe2 Kh8 12. Rd1 Qc7 13. cxd6 Bxd6 14. Be3 Qe7 15. Rd2 Nbd7 16. Ng5 Bg8 17. Rad1 Bb4 18. f4 Nb6 19. fxe5 Qxe5 20. Bf4 Qa5 21. e5 Nfd5 22. Be4 Qc5+ 23. Kh1 Nxf4 24. gxf4 Rxf4 25. Bxh7 Raf8 26. Nce4 Bc4 27. Qh5 Rf1+ 28. Rxf1 Rxf1+ 29. Kg2 Qg1+ 30. Kh3 Qe3+ 31. Ng3 Qxd2 32. Bd3+ Kg8 33. Bxc4+ Nxc4 34. Qh7+ Kf8 35. Qh8+ Ke7 36. Qxg7+ Ke8 37. Qg6+ Ke7 38. Nxf1 Qf4 39. Qg7+ Ke8 40. Ng3 Qxe5 41. Qg8+ Kd7 42. Qg7+ Be7 1/2-1/2

[Event "US Open-83"]
[Site "St Paul"]
[Date "1982.08.17"]
[Round "9"]
[White "Fortado, Bruce"]
[Black "Katrein, Matthew R"]
[Result "0-1"]
[ECO "B22"]
[PlyCount "66"]
[EventDate "1982.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 e6 6. cxd4 Nc6 7. a3 Be7 8. Bd3 d6 9. 0-0 Qc7 10. Re1 dxe5 11. dxe5 0-0 12. Bd2 b6 13. Nc3 Nxc3 14. Bxc3 Bb7 15. Qe2 Rfd8 16. Rac1 a6 17. h4 b5 18. b4 Rd7 19. Bb1 Qd8 20. Qe4 g6 21. Qg4 Bf8 22. Ng5 Ne7 23. Be4 Bxe4 24. Nxe4 Nd5 25. Nf6+ Nxf6 26. exf6 Rc8 27. Be5 Rd3 28. Qe4 Rxa3 29. Qb7 Rxc1 30. Rxc1 Qd2 31. Rc8 Qe1+ 32. Kh2 Qxe5+ 33. g3 Qxf6 0-1

[Event "US Open-83"]
[Site "St Paul"]
[Date "1982.08.13"]
[Round "6"]
[White "Katrein, Matthew R"]
[Black "Meyer, John C"]
[Result "0-1"]
[ECO "E92"]
[PlyCount "86"]
[EventDate "1982.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. d4 0-0 5. e4 d6 6. Be2 e5 7. dxe5 dxe5 8. Bg5 Nbd7 9. h3 c6 10. 0-0 Qc7 11. Qc2 Nc5 12. Rfd1 Ne6 13. Be3 Nh5 14. c5 Qe7 15. b4 Nhf4 16. Bc4 Ng5 17. Nxg5 Qxg5 18. Bxf4 exf4 19. Rd3 a5 20. Rad1 Be5 21. Na4 Bc7 22. a3 axb4 23. axb4 Qe5 24. Nb6 Bxb6 25. cxb6 g5 26. Qe2 Bf5 27. Rd4 Ra1 28. Rxa1 Qxd4 29. Rd1 Qxe4 30. Qxe4 Bxe4 31. Rd7 Bd5 32. Bxd5 cxd5 33. Rxd5 f6 34. Rd7 Rf7 35. Rc7 Kf8 36. Kf1 Re7 37. Rxe7 Kxe7 38. Ke2 Ke6 39. Kd3 Kd5 40. f3 h6 41. Kc3 Kc6 42. Kb3 Kxb6 43. Ka4 Ka6 0-1

[Event "US Open-83"]
[Site "St Paul"]
[Date "1982.08.10"]
[Round "3"]
[White "Finegold, Benjamin"]
[Black "Katrein, Matthew R"]
[Result "0-1"]
[ECO "A96"]
[PlyCount "60"]
[EventDate "1982.08.08"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 e6 3. g3 Nf6 4. Bg2 Be7 5. 0-0 0-0 6. c4 d6 7. Nc3 a5 8. Re1 Ne4 9. Qc2 Nc6 10. a3 Nxc3 11. Qxc3 Bf6 12. e4 fxe4 13. Rxe4 e5 14. dxe5 dxe5 15. g4 Bxg4 16. Rxg4 e4 17. Qe3 exf3 18. Bxf3 Kh8 19. Rg3 Bd4 20. Qe4 Qf6 21. Bg5 Bxf2+ 22. Kg2 Qxb2 23. Rb1 Qa2 24. Rg4 Bh4+ 25. Kh1 Rae8 26. Rxh4 Rxe4 27. Bxe4 Qxc4 28. Rg1 Rf1 29. Bxh7 Rxg1+ 30. Kxg1 Qc5+ 0-1

[Event "Empire State op"]
[Site "Albany"]
[Date "1982.05.02"]
[Round "4"]
[White "Alexopoulos, Georgios"]
[Black "Katrein, Matthew R"]
[Result "1/2-1/2"]
[ECO "A96"]
[WhiteElo "2200"]
[PlyCount "59"]
[EventDate "1982.05.01"]
[EventType "swiss"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 f5 2. c4 Nf6 3. Nc3 e6 4. g3 Be7 5. Bg2 0-0 6. Nf3 d6 7. 0-0 a5 8. Qc2 Nc6 9. a3 e5 10. d5 Nb8 11. e4 Nxe4 12. Nxe4 fxe4 13. Nd2 e3 14. fxe3 Rxf1+ 15. Bxf1 Bg5 16. Ne4 Bf5 17. Bd3 Bg6 18. Bd2 Nd7 19. Rf1 Qe7 20. Nc3 Bxd3 21. Qxd3 Nc5 22. Qc2 Rf8 23. Rxf8+ Qxf8 24. b4 axb4 25. axb4 Nd7 26. Ne4 Qf5 27. Qd3 Kf8 28. Qf1 Qxf1+ 29. Kxf1 Be7 30. Ke2 1/2-1/2

[Event "US Open-82"]
[Site "Palo Alto"]
[Date "1981.??.??"]
[Round "11"]
[White "Katrein, Matthew R"]
[Black "Anderson, Renard"]
[Result "1-0"]
[ECO "A33"]
[PlyCount "77"]
[EventDate "1981.08.02"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bc5 7. Nd6+ Bxd6 8. Qxd6 Qe7 9. Qxe7+ Kxe7 10. Bg5 d6 11. e4 b6 12. 0-0-0 Bb7 13. b3 h6 14. Bf4 Rhd8 15. Be2 Rd7 16. Rd2 Rad8 17. Rhd1 Ba8 18. Kb2 g5 19. Be3 Ne5 20. f3 Nh5 21. g3 Nf6 22. h3 Ng6 23. a4 d5 24. exd5 exd5 25. Bd4 Nh5 26. c5 bxc5 27. Bxc5+ Kf6 28. Bf2 Ne7 29. f4 Ng7 30. Bd4+ Kg6 31. Bd3+ f5 32. fxg5 hxg5 33. g4 Ne6 34. Ne2 Rf8 35. Rf1 Nxd4 36. Nxd4 Rd6 37. Re2 Rf7 38. Rxe7 Rxe7 39. Nxf5 1-0

[Event "USA corr"]
[Site "USA"]
[Date "1981.??.??"]
[Round "?"]
[White "Katrein, Matthew R"]
[Black "Vehre, John L Jr"]
[Result "1/2-1/2"]
[ECO "A36"]
[PlyCount "65"]
[EventDate "1981.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 c5 3. g3 Bg7 4. Bg2 Nc6 5. e3 e6 6. Nge2 Nge7 7. 0-0 0-0 8. d4 cxd4 9. Nxd4 d5 10. Nxc6 bxc6 11. Qa4 Bd7 12. Rd1 Qc7 13. Bd2 Rab8 14. Rac1 Nf5 15. b3 d4 16. exd4 Nxd4 17. Qa3 e5 18. h3 Bf5 19. Be3 h5 20. b4 Nc2 21. Qxa7 Rb7 22. Qc5 Nxe3 23. Qxe3 Rxb4 24. Qc5 Qb6 25. Qxb6 Rxb6 26. Rd6 Ra8 27. Rxc6 Rxc6 28. Bxc6 Ra3 29. Nb5 Rxa2 30. Bd5 Bf8 31. c5 Ra5 32. Bc4 Bxc5 33. Bxf7+ 1/2-1/2

[Event "US Open-82"]
[Site "Palo Alto"]
[Date "1981.??.??"]
[Round "12"]
[White "Lakdawala, Cyrus"]
[Black "Katrein, Matthew R"]
[Result "1/2-1/2"]
[ECO "A29"]
[PlyCount "108"]
[EventDate "1981.08.02"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 g6 5. d4 exd4 6. Nxd4 Nxd4 7. Qxd4 Bg7 8. Qe3+ Qe7 9. Nb5 Qxe3 10. Bxe3 Kd8 11. Bd4 a6 12. Nc3 d6 13. 0-0-0 Be6 14. c5 Ke7 15. Bg2 Rab8 16. cxd6+ cxd6 17. Nd5+ Nxd5 18. Bxg7 Rhc8+ 19. Kb1 Nb4 20. a3 Nc6 21. Bc3 Rd8 22. f4 Rd7 23. Bd5 Na7 24. Rd3 Nb5 25. Bb4 Nc7 26. Bf3 Ne8 27. Rhd1 f5 28. e4 fxe4 29. Bxe4 Rbd8 30. Ka1 Kf7 31. Bd5 Bxd5 32. Rxd5 Nf6 33. R5d3 Ne4 34. Rd4 d5 35. Ba5 Nc5 36. Ka2 Rc8 37. Rxd5 Rxd5 38. Rxd5 Ke6 39. Re5+ Kf6 40. Bc3 Na4 41. Bb4 b5 42. Re2 h5 43. Rd2 Rc6 44. b3 Nb6 45. Ba5 Kf5 46. Bxb6 Rxb6 47. Rd5+ Ke4 48. Rg5 Rc6 49. Kb2 Kd3 50. Rd5+ Ke4 51. Rg5 Kd3 52. a4 b4 53. Rd5+ Ke4 54. Re5+ Kd3 1/2-1/2

[Event "USA corr"]
[Site "USA"]
[Date "1981.??.??"]
[Round "?"]
[White "Vehre, John L Jr"]
[Black "Katrein, Matthew R"]
[Result "1/2-1/2"]
[ECO "D27"]
[PlyCount "68"]
[EventDate "1981.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. Nf3 c5 7. 0-0 dxc4 8. Bxc4 cxd4 9. exd4 a6 10. a4 b6 11. Bg5 Be7 12. Qd3 Nc6 13. Rfd1 Nb4 14. Qe2 Bb7 15. Ne5 Nfd5 16. Bxe7 Qxe7 17. Nxd5 Nxd5 18. Bxd5 Bxd5 19. Rdc1 Qb7 20. f3 Rfc8 21. Qe3 Rxc1+ 22. Rxc1 Rc8 23. Rc3 f6 24. Ng4 Rxc3 25. Qxc3 Qc6 26. Qxc6 Bxc6 27. b3 Kf7 28. Ne3 Ke7 29. Kf2 Kd6 30. Ke2 Be8 31. Kd3 b5 32. a5 g5 33. Kc3 Bg6 34. Ng4 Ke7 1/2-1/2

[Event "US Open-80"]
[Site "Chicago"]
[Date "1979.07.30"]
[Round "2"]
[White "Lanni, Diana"]
[Black "Katrein, Matthew R"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "1762"]
[BlackElo "2171"]
[PlyCount "139"]
[EventDate "1979.07.29"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nh3 d6 5. f4 0-0 6. Nf2 Nbd7 7. 0-0 c5 8. e3 e5 9. Nc3 Rb8 10. dxc5 Nxc5 11. Nd5 Nxd5 12. Bxd5 Qb6 13. Rb1 Bf5 14. Kh1 exf4 15. e4 Be6 16. Bxf4 Rbd8 17. Ng4 Bxd5 18. Qxd5 Qc6 19. Bg5 Rc8 20. Nh6+ Bxh6 21. Bxh6 Nxe4 22. Qxc6 bxc6 23. Bxf8 Kxf8 24. Rbd1 Kg7 25. Kg2 h5 26. c4 f5 27. h3 Kf6 28. g4 hxg4 29. hxg4 Ke5 30. gxf5 gxf5 31. Kf3 Rg8 32. Rg1 Rxg1 33. Rxg1 Nd2+ 34. Ke2 Nxc4 35. b3 Nb6 36. Rg7 a5 37. Ra7 Kd4 38. Rxa5 c5 39. Ra6 Nd5 40. Rxd6 Ke5 41. Ra6 Nb4 42. Ra8 Kd4 43. Kd2 c4 44. Rd8+ Nd5 45. bxc4 Kxc4 46. a4 Nb4 47. Rf8 Na6 48. Rxf5 Kb4 49. Rf4+ Ka5 50. Kc3 Nb8 51. Rf8 Nc6 52. Ra8+ Kb6 53. Kc4 Na5+ 54. Kd5 Nc6 55. Rh8 Nb4+ 56. Kd6 Na6 57. Ra8 Kb7 58. Rh8 Kb6 59. Rh5 Nb8 60. Rb5+ Ka7 61. Kc7 Na6+ 62. Kc8 Ka8 63. a5 Ka7 64. Rb6 Nc5 65. Kc7 Na6+ 66. Kc6 Nb8+ 67. Kb5 Nd7 68. Rh6 Ka8 69. Rh8+ Nb8 70. Rh7 1-0

[Event "US Open-78"]
[Site "Columbus"]
[Date "1977.08.??"]
[Round "?"]
[White "Farooqui, Zahiruddin"]
[Black "Katrein, Matthew R"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2325"]
[PlyCount "21"]
[EventDate "1977.08.07"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nf6 3. Nc3 e6 4. d4 cxd4 5. Nxd4 Bb4 6. Bd3 d5 7. e5 Qc7 8. exf6 Bxc3+ 9. bxc3 Qxc3+ 10. Qd2 Qxa1 11. c3 1-0

[Event "US Open-78"]
[Site "Columbus"]
[Date "1977.08.??"]
[Round "?"]
[White "Katrein, Matthew R"]
[Black "Jacowitz, Martin"]
[Result "1-0"]
[ECO "C56"]
[PlyCount "57"]
[EventDate "1977.08.07"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nc6 5. 0-0 Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. Nce4 0-0-0 12. fxg7 Rhg8 13. g4 Qe5 14. Nxe6 fxe6 15. Bh6 Bb4 16. f4 Qb5 17. Nf6 Bxe1 18. Qxe1 e5 19. Nxg8 Rxg8 20. Qe4 Qxb2 21. Qf5+ Kd8 22. Qf8+ Kd7 23. Qxg8 Qxa1+ 24. Kg2 Ne7 25. Qf7 Qxa2 26. g8Q Qxc2+ 27. Kh3 Qd3+ 28. Kh4 c3 29. Qe6# 1-0

[Event "US Open-78"]
[Site "Columbus"]
[Date "1977.08.??"]
[Round "?"]
[White "Katrein, Matthew R"]
[Black "Malpert, Rodney Alan"]
[Result "0-1"]
[ECO "A26"]
[PlyCount "78"]
[EventDate "1977.08.07"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 Nc6 2. Nc3 e5 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4 Nge7 7. Nge2 0-0 8. 0-0 f5 9. f4 Nd4 10. Nxd4 exd4 11. Nd5 fxe4 12. Nxe7+ Qxe7 13. Bxe4 c6 14. Bd2 Be6 15. Re1 Qd7 16. Qa4 a6 17. Qa5 b6 18. Qa3 Rfe8 19. b3 d5 20. cxd5 Bxd5 21. Bxd5+ Qxd5 22. Rxe8+ Rxe8 23. Re1 Rxe1+ 24. Bxe1 Qe6 25. Qc1 c5 26. Kf2 b5 27. Bd2 Qf5 28. Qh1 h5 29. Qa8+ Kh7 30. Ke2 Qh3 31. Qh1 h4 32. Be1 c4 33. bxc4 bxc4 34. dxc4 Qe6+ 35. Kd1 Qxc4 36. Qg2 d3 37. Bd2 Qc2+ 38. Ke1 Bc3 39. Qa8 Qxd2+ 0-1

[Event "US Open-78"]
[Site "Columbus"]
[Date "1977.08.??"]
[Round "?"]
[White "Katrein, Matthew R"]
[Black "Unruh, Charles M"]
[Result "1-0"]
[ECO "A21"]
[PlyCount "103"]
[EventDate "1977.08.07"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. Nf3 d6 4. g3 e5 5. Bg2 f5 6. e4 Nf6 7. exf5 gxf5 8. d4 Nc6 9. dxe5 Nxe5 10. Nxe5 dxe5 11. Qxd8+ Kxd8 12. Bg5 c6 13. 0-0-0+ Kc7 14. Rhe1 Re8 15. b3 Bd7 16. Re2 Re7 17. Rde1 Rae8 18. Nd1 Bc8 19. Bh3 Rf7 20. Rxe5 Rxe5 21. Rxe5 Ng4 22. Re8 Nxh2 23. Bf4+ Kd7 24. Rg8 Bf8 25. Ne3 Ke7 26. c5 Kf6 27. Nc4 Bd7 28. Ne5 Bxc5 29. Nxf7 Kxf7 30. Rh8 Kg6 31. Be3 Ba3+ 32. Kd1 a5 33. Ra8 Bb4 34. Bd2 Bc5 35. f4 b6 36. Ra7 Be6 37. Bc3 Ng4 38. Bxg4 fxg4 39. Rg7+ Kf5 40. Rg5+ Ke4 41. Re5+ Kd3 42. Rxe6 Kxc3 43. f5 Kb2 44. Re2+ Ka3 45. f6 a4 46. bxa4 Kxa4 47. f7 Ka3 48. Rc2 Be7 49. Rxc6 Kxa2 50. Rxb6 h5 51. Kc2 Ka3 52. Rb8 1-0

