[Event "Iowa m1"]
[Site "Iowa"]
[Date "1973.??.??"]
[Round "?"]
[White "Knudsen, John C"]
[Black "Powers, G."]
[Result "0-1"]
[ECO "A03"]
[PlyCount "60"]
[EventDate "1973.??.??"]
[EventType "match"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. f4 d5 2. e3 e6 3. Nf3 Nc6 4. Bb5 Bd7 5. 0-0 a6 6. Bxc6 Bxc6 7. d4 Nf6 8. Nc3 Bb4 9. Re1 Bxc3 10. bxc3 Ne4 11. Ba3 Nxc3 12. Qd3 Nb5 13. Ne5 Nxa3 14. Qxa3 Bb5 15. Rac1 f6 16. Nd3 g5 17. Nc5 Qe7 18. Qc3 b6 19. Nd3 gxf4 20. Nxf4 c5 21. e4 0-0 22. exd5 cxd4 23. Qxd4 Rac8 24. Rxe6 Qa3 25. Rce1 Rc4 26. Qf2 Qxa2 27. Qg3+ Kh8 28. Nh5 Rg8 29. Nxf6 Rxg3 30. hxg3 Rxc2 0-1

[Event "Iowa m1"]
[Site "Iowa"]
[Date "1973.??.??"]
[Round "?"]
[White "Knudsen, John C"]
[Black "Powers, G."]
[Result "1-0"]
[ECO "A04"]
[PlyCount "29"]
[EventDate "1973.??.??"]
[EventType "match"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 b5 2. g3 Bb7 3. Bg2 e5 4. 0-0 d6 5. d3 Qf6 6. Nbd2 a5 7. b3 Qe6 8. Bb2 Ra7 9. d4 e4 10. Ng5 e3 11. Nxe6 Bxg2 12. Kxg2 exd2 13. Nf4 Nf6 14. Qxd2 Ne4 15. Qe3 1-0

[Event "Iowa m2"]
[Site "Iowa"]
[Date "1973.??.??"]
[Round "1"]
[White "Knudsen, John C"]
[Black "Powers, G."]
[Result "1-0"]
[ECO "A06"]
[PlyCount "57"]
[EventDate "1973.??.??"]
[EventType "match"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 d5 2. b3 Bf5 3. Bb2 Nc6 4. e3 h6 5. c4 e6 6. cxd5 exd5 7. d3 Nf6 8. Nbd2 Nb4 9. e4 Qe7 10. Bxf6 gxf6 11. Be2 dxe4 12. dxe4 Bxe4 13. Nxe4 Qxe4 14. 0-0 Rg8 15. Re1 Qg6 16. Bd3+ Be7 17. Bxg6 Rxg6 18. Rxe7+ Kxe7 19. Qe2+ Kf8 20. Re1 Kg7 21. Nh4 Rg5 22. f4 Ra5 23. Qg4+ Kh7 24. Re7 Rf8 25. Nf5 Rg8 26. Rxf7+ Kh8 27. Qh5 Rxg2+ 28. Kxg2 Rxa2+ 29. Kh3 1-0

[Event "Iowa m2"]
[Site "Iowa"]
[Date "1973.??.??"]
[Round "3"]
[White "Knudsen, John C"]
[Black "Powers, G."]
[Result "1-0"]
[ECO "A04"]
[PlyCount "75"]
[EventDate "1973.??.??"]
[EventType "match"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 e6 2. b3 Bc5 3. Bb2 Nf6 4. e3 d5 5. c4 Nc6 6. d4 Bb4+ 7. Nc3 Ne4 8. Qd3 Bxc3+ 9. Bxc3 0-0 10. Nd2 f5 11. Nxe4 fxe4 12. Qc2 Qf6 13. b4 a6 14. a4 Bd7 15. b5 axb5 16. cxb5 Na5 17. Bxa5 Rxa5 18. Ra2 c6 19. b6 c5 20. dxc5 Rc8 21. Be2 Rcxc5 22. Qb3 Rc3 23. Qb4 Rc1+ 24. Kd2 Rxh1 25. Qxa5 Rxh2 26. Qa8+ Kf7 27. Qxb7 Qe7 28. Rb2 Kg6 29. Qc7 Rxg2 30. b7 d4 31. Qf4 dxe3+ 32. Qxe3 Qd6+ 33. Ke1 Bxa4 34. Qxe4+ Kf7 35. Qf3+ Ke7 36. b8Q Rg1+ 37. Bf1 Qd1+ 38. Qxd1 1-0

[Event "Iowa m1"]
[Site "Iowa"]
[Date "1973.??.??"]
[Round "?"]
[White "Powers, G."]
[Black "Knudsen, John C"]
[Result "0-1"]
[ECO "A01"]
[PlyCount "64"]
[EventDate "1973.??.??"]
[EventType "match"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 d6 3. d4 exd4 4. Qxd4 Nf6 5. e3 Nc6 6. Bb5 Bd7 7. Bxc6 Bxc6 8. Nf3 Qd7 9. Nc3 0-0-0 10. Qxa7 b6 11. Nb5 Bb7 12. Qa4 Kb8 13. 0-0-0 Ne4 14. Qa7+ Kc8 15. a4 Nxf2 16. a5 Qxb5 17. axb6 Qa6 18. Rd4 Qxa7 19. bxa7 Nxh1 20. Ra4 Bxf3 21. gxf3 Kb7 22. Bd4 c5 23. Bc3 Ra8 24. Rc4 f6 25. b4 Rxa7 26. bxc5 dxc5 27. Re4 Bd6 28. Bb2 Nf2 29. Re6 Rd8 30. Bxf6 gxf6 31. Rxf6 Ra1+ 32. Kd2 Ra2 0-1

[Event "Iowa m1"]
[Site "Iowa"]
[Date "1973.??.??"]
[Round "?"]
[White "Powers, G."]
[Black "Knudsen, John C"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "68"]
[EventDate "1973.??.??"]
[EventType "match"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. b4 c6 2. c4 e5 3. Bb2 f6 4. a3 d5 5. e3 Be6 6. d3 Qb6 7. c5 Bxc5 8. Bc3 Bd6 9. Nf3 Ne7 10. d4 e4 11. Nh4 g5 12. Qh5+ Kd7 13. f4 gxh4 14. Qxh4 f5 15. Be2 Na6 16. 0-0 Rag8 17. Nd2 Ng6 18. Qf2 Qd8 19. Nb3 Qf8 20. b5 Nc7 21. bxc6+ bxc6 22. Ba5 h5 23. Bxc7 Bxc7 24. Nc5+ Kd6 25. Qe1 Qg7 26. Qb4 Nxf4 27. Nxe4+ Kd7 28. Nc5+ Ke8 29. Bf3 Nh3+ 30. Kh1 Bxh2 31. Nxe6 Qg3 32. gxh3 Qxh3 33. Rf2 Bd6+ 34. Rh2 Qxh2# 0-1

[Event "Iowa m2"]
[Site "Iowa"]
[Date "1973.??.??"]
[Round "2"]
[White "Powers, G."]
[Black "Knudsen, John C"]
[Result "0-1"]
[ECO "E20"]
[PlyCount "78"]
[EventDate "1973.??.??"]
[EventType "match"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bd2 c5 5. a3 Bxc3 6. Bxc3 Ne4 7. Qc2 Nxc3 8. bxc3 Na6 9. e4 0-0 10. Nf3 b6 11. Bd3 g6 12. d5 Bb7 13. Ne5 d6 14. Ng4 Qg5 15. f3 h5 16. h4 Qf4 17. e5 hxg4 18. Bxg6 Qxe5+ 19. Kf2 g3+ 20. Kf1 fxg6 21. Qxg6+ Qg7 22. Qxe6+ Rf7 23. Qxd6 Rxf3+ 24. Kg1 Rf7 25. Rc1 Raf8 26. Rh3 Qf6 27. Rxg3+ Kh8 28. Qxf6+ Rxf6 29. Re1 b5 30. Re7 Rf1+ 31. Kh2 R1f7 32. Rxf7 Rxf7 33. cxb5 Nc7 34. d6 Nxb5 35. Rd3 Rd7 36. g4 Nxa3 37. c4 Nxc4 38. g5 Rxd6 39. Rf3 Bxf3 0-1

[Event "Iowa m2"]
[Site "Iowa"]
[Date "1973.??.??"]
[Round "4"]
[White "Powers, G."]
[Black "Knudsen, John C"]
[Result "0-1"]
[ECO "A45"]
[PlyCount "60"]
[EventDate "1973.??.??"]
[EventType "match"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. g3 e6 3. Bg2 Nc6 4. e4 Be7 5. e5 Nd5 6. c4 Nb6 7. c5 Nd5 8. b3 b6 9. Be3 Bb7 10. cxb6 cxb6 11. Bd2 0-0 12. Qc2 Bg5 13. a3 Bxd2+ 14. Nxd2 Nxd4 15. Qd3 Nc6 16. h4 Nce7 17. Be4 g6 18. h5 Qc7 19. hxg6 fxg6 20. Ngf3 Rac8 21. Ng5 Qxe5 22. Nxh7 Qxa1+ 23. Ke2 Qe5 24. Nf3 Rxf3 25. Kxf3 Rc3 26. Qxc3 Qxc3+ 27. Kg2 Nf5 28. Ng5 Nde3+ 29. fxe3 Nxe3+ 30. Kh3 Qh8+ 0-1

[Event "corr"]
[Site "corr"]
[Date "1973.??.??"]
[Round "?"]
[White "Powers, G."]
[Black "Knudsen, John C"]
[Result "0-1"]
[ECO "E00"]
[PlyCount "63"]
[EventDate "1973.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 e6 3. Bg5 h6 4. Bh4 Be7 5. Nf3 d5 6. e3 Nbd7 7. Nbd2 b6 8. Qc2 0-0 9. Be2 a5 10. Qd3 Ba6 11. b3 Bb4 12. Bd1 Qe7 13. Bc2 Qe8 14. Rd1 dxc4 15. bxc4 c5 16. Ne5 g6 17. Nxd7 Nxd7 18. 0-0 f5 19. Nf3 g5 20. Bxg5 hxg5 21. a3 Bxa3 22. Qxa3 Bxc4 23. Rfe1 g4 24. Ne5 Nxe5 25. dxe5 Bd5 26. e4 fxe4 27. Bxe4 Bxe4 28. Rxe4 Qg6 29. Ree1 Rad8 30. Qg3 Qf5 31. Qe3 Rxd1 32. Rxd1 0-1

