Thursday, July 30, 2015

2015 Winnipeg Open has been rated by the CFC

2015 Winnipeg Open has been rated by the CFC.

See the crosstable here: http://chess.ca/crosstable?tournament_check_number=201507059

Congratulations to the following who achieved new peak established ratings:

Issac Wiebe 2121 (+84 !)
Marcos Valentino 2210
Jamie Campbell (+205 !!)
Phil Le Dorze 1850
Jim Hemphill 1762
Mark Jenkins 1455
Brock Beach 1874

Wednesday, July 29, 2015

Cecil's Saturday Puzzle - July 25, 2015

from the Winnipeg Free Press
White to move and mate in 2 (Funk)

Sunday, July 26, 2015

Joe Dreman - biographical notes

This will be a work in process -

From '100 Years of Chess in Canada' by D.A. Yanofsky, 1967
Israel Joseph Dreman
Born in Winnipeg in 1910. "Joe " Dreman learned to play chess while a youngster and received his chess training at the Winnipeg Jewish Chess Club. Though he has won the Manitoba Championship three times and the Club championship several times, he has strangely enough, never competed for the National title. Though very successful in business and preoccupied with business affairs he has never let his interest flag in the game, and even today ranks among the best in Winnipeg, if not in Canada.

From the obituary in the Winnipeg Free Press, August 4, 2000:

ISRAEL DREMAN

ISRAEL JOSEPH DREMAN On Monday night, July 31, 2000 at the St. Boniface Hospital, Joe Dreman passed away in the quiet and noble manner in which he lived his life. Recently having celebrated his 90th birthday, surrounded by loving family and cherished friends, he embraced his final days with few regrets and the comfort of a life that he regarded as full and resplendent with rich and wonderful memories. Joe is survived by his beloved Rae, his wife of 65 years and his three children, of whom he was so proud; sons, David (Holly) and Solly (Orly), and his daughter Sherrill (Dane Hershberg) as well as his grandchildren, Tyler, Erin, Evan, Dalit, Galia, Orna, Ditto and Meredith; also two great-grandsons, Yonaton and Yuval. He was predeceased by his brothers, Samuel, Harry, Victor, Simon and Abe and sisters, Edith and Rose. Joe's chosen field, futures trading in commodities, was never a chore but always an adventure he pursued with passion. His career in the grain trade spanned sixty years starting as a runner on the trading floor in 1928 to eventually, in the 1940s becoming a partner in The Northwest Commission and then the sole owner. The company was renamed Dreman & Co. in 1958. He was honoured by the Exchange in 1993, for his long term contributions. He was President of the Brokers Association for much of the 1960s and 1970s, in addition to having served on various Exchange committees. He was proud to be the first Jewish member of the Winnipeg Commodity Exchange and he was also a member of the Investment Dealers Association. His career was rewarded with considerable financial success but the true measure of Joe Dreman, the businessman, was the high esteem in which he was held, by his colleagues in the investment and general business community. This was evidenced by his being the recipient of the Hebrew University-Manitoba Excellence Award for Excellence in Business in 1998. His judgement was respected, his word never questioned and his friendship greatly valued. He was known as a man of honour and he personified integrity. Joe enjoyed great success as a chess player having been a repeated winner of the Manitoba Chess Championship. He was a great supporter of the development of young players and of the game, in general. Many owe their success to his nurturing and encouragement. Joe was a past president of the Glendale Golf & Country Club, and a long serving board member of the YMHA and the Shaarey Zedek Synagogue. He was a devoted philanthropist who supported worthwhile charities in a selfless manner. His attachment to Israel was steadfast and he gave generously of his time and energies, visiting over 50 times and lending his financial support to the development of a state, dear to his heart. On a more personal level, Joe never refused a request for his help and it was always given in a respectful manner with great sensitivity to the preservation of the dignity of others. His family was continually surprised by the incidents that people would relate of how Joe was instrumental in their lives, for deeds for which he never took credit. Mostly Joe will be remembered as a family man. Nothing was more important to him than the closeness of family. He applauded and revelled in their successes and suffered all their misfortunes, as his own. He was a constant source of support, counsel and occasional advice. His love was unconditional. He cherished his wife, loved and respected his sons and absolutely adored his daughter. His son-in-law and daughters-in-law, to him were his own children and were treated as such. His grandchildren were his never ending joy and he considered them the great dividends of his good fortune. Joes friends were numerous, loyal and devoted. Joes life was rich and full and for that he was truly grateful. He leaves this world a better place for his presence. He will be missed but his memory will live on in the hearts of the many people whose lives he touched and in those of a loving family, who survive him. Joes funeral was conducted at the Shaarey Zedek Synagogue on Wednesday, August 2. Active pallbearers were Tyler Hershberg, Evan Hershberg, Earl Rosenbloom, David Cohen, Nelson Zagalsky, Charles Wiener and Marilyn Resnick. Serving as honorary pallbearers were Rabbi Louis Berkal, Harold Buchwald C.M. Q.C. L.L.D., Brownie Freedman, Dr. Richard Hershberg, George T. Richardson O.M., Honorable James A. Richardson, and Sally Schulman. The family wishes to thank Dr. Neil Lerner and the nursing staff of 5B, St. Boniface Hospital, for their compassionate care. A fund has been established to honour the life of Joe Dreman at the Jewish Foundation of Manitoba (477-7525).
As published in the Winnipeg Free Press on August 04, 2000
-------------------------------------------------------------------------------------------------------------------------------------
From Winnipeg Tribune archival material:
Joe Dreman first won the Manitoba Championship in 1935.
Dreman_1935_Ch_May_11_1935

He repeated in 1936.
Dreman_Pic_1936_Ch_Mar_28_1936
Dreman_1936_Ch_Mar_28_1936
Dreman_Game_1936_Ch_Mar_28_1936
He also won the Jewish Club Championship in 1937
chesschamp

Saturday, July 18, 2015

FM Kevin Gentes at the Canadian Open - Round 7 - 9

In Round 7 Kevin lost to FM Michael Barron

In Round 8 Kevin drew Guannan Terry Song

In Round 9 Kevin drew FM Robert Hamilton

Crosstable here: http://www.canadianchesszonal.com/xtab.html

[Event "2015 Canadian Closed"]
[Site "Guelph, Ontario"]
[Date "2015.07.14"]
[Round "7.9"]
[White "Barron, Michael"]
[Black "Gentes, Kevin"]
[Result "1-0"]
[ECO "C91"]
[WhiteElo "2306"]
[BlackElo "2353"]
[PlyCount "87"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]
[TimeControl "40/5400+30:1800+30"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. d4 Bg4 10. d5 Na5 11. Bc2 c6 12. h3 Bc8 13. dxc6 Qc7 14. Nbd2 Qxc6 15.
Nf1 Nc4 16. a4 Be6 17. Qe2 Rfe8 18. Bd3 Nd7 19. b3 Ncb6 20. axb5 axb5 21. Bb2
Bxb3 22. Bxb5 Qc7 23. Ne3 Be6 24. c4 Reb8 25. Nd5 Bxd5 26. cxd5 Nc5 27. Bc6
Rxa1 28. Rxa1 Nbd7 29. Bc3 Nf6 30. Nd2 g6 31. g3 Kg7 32. Kg2 Nb3 33. Ra4 Nd7
34. Nxb3 Rxb3 35. Qc4 Nc5 36. Ra8 Rxc3 37. Qxc3 Nxe4 38. Qe3 Nc5 39. Qa3 Qb6
40. Qa7 Qb2 41. Qxe7 Ne4 42. Qa7 Qe2 43. Qe3 Qc4 44. Ra4 1-0

[White "Gentes, Kevin"]
[Black "Song, Guannan Terry"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "2353"]
[BlackElo "2202"]
[PlyCount "89"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]

1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. O-O Nf6 5. c4 e6 6. b3 Be7 7. Bb2 O-O 8. e3 d6
9. Nc3 Ne4 10. Qc2 Nxc3 11. Bxc3 Qc7 12. Qb2 e5 13. d4 exd4 14. exd4 Bf6 15.
Rad1 Nc6 16. d5 Bxc3 17. Qxc3 Ne7 18. Rfe1 Bc8 19. Qe3 Ng6 20. Nd2 Bg4 21. f3
Bf5 22. h3 Bd7 23. f4 a6 24. Qc3 b5 25. h4 Bg4 26. Bf3 Bxf3 27. Nxf3 Ne7 28. h5
h6 29. g4 Qd7 30. Kf2 bxc4 31. bxc4 f6 32. Re6 Nc6 33. Rde1 Nd4 34. Nxd4 cxd4
35. Qxd4 Rac8 36. Kg3 Qa4 37. Re7 Qxc4 38. Qa7 Qd3+ 39. R1e3 Qh7 40. Qxa6 Qb1
41. Qa7 Qg1+ 42. Kh3 Qh1+ 43. Kg3 Qg1+ 44. Kh4 Kh8 45. Rxg7 1/2-1/2

[Event "2015 Canadian Closed"]
[Site "Guelph, Ontario"]
[Date "2015.07.16"]
[Round "9.12"]
[White "Hamilton, Robert"]
[Black "Gentes, Kevin"]
[Result "1/2-1/2"]
[ECO "D59"]
[WhiteElo "2279"]
[BlackElo "2353"]
[PlyCount "82"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5
Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6 12. Qa4 c5 13. dxc5 bxc5 14. Be2
Rc8 15. O-O a5 16. Ne5 Qd6 17. Nd3 Nd7 18. Nf4 Nf6 19. Rfd1 Qb6 20. Qc2 Rab8
21. b3 Qc6 22. a4 Qb7 23. Rb1 Qb6 24. h3 Rd8 25. Rbc1 Rbc8 26. Bb5 Ne4 27. Bd3
Nf6 28. Be2 Rc7 29. Bf3 c4 30. e4 Rdc8 31. bxc4 Rxc4 32. Qd2 Rxc1 33. Rxc1
Rxc1+ 34. Qxc1 dxe4 35. Nxe6 Qxe6 36. Be2 Qe5 37. Bc4 Nd5 38. Kf1 Nc3 39. Qd2
Qf6 40. Bb3 g6 41. Kg1 Kg7 1/2-1/2

Tuesday, July 14, 2015

FM Kevin Gentes at the Canadian Closed - Rounds 4-6

In round 4, Kevin defeated Michael Buscar; in round 5 he drew with rising star and former World Youth Champion Jason Cao; in round 6 he lost to IM Noritsyn.

[Event "2015 Canadian Closed"]
[Site "Guelph, Ontario"]
[Date "2015.07.12"]
[Round "4.9"]
[White "Gentes, Kevin"]
[Black "Buscar, Michael"]
[Result "1-0"]
[ECO "A53"]
[WhiteElo "2353"]
[BlackElo "2245"]
[Annotator "Bond,Hal"]
[PlyCount "103"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]
[TimeControl "40/5400+30:1800+30"]

 1. Nf3  d6 2. d4 Bg4 3. c4 c6 4. Nc3 Nd7 5. e4 e5 6. Be2 Qc7 7. O-O Ngf6
8. Be3 Be7 9. d5 O-O 10. h3 Bh5 11. g4 Bg6 12. Nd2
Nc5 13. f3 Nfd7 14. b4 Na6 15. a3 Qd8 16. dxc6 bxc6 17. c5 Nab8 18. cxd6 Bxd6
19. Nc4 Bc7 20. Na4 Qe7 21. Qc2 Rc8 22. Kg2 Nf8 23. Nc5 Nbd7 24. Rfd1 Nb6 25.
Qc3 Nxc4 26. Bxc4 Bb6 27. Rd2 a5 28. Rad1 axb4 29. axb4 Rd8 30. Rxd8 Rxd8 31.
Rxd8 Bxd8 32. Nd3 Bc7 33. Bb3 Bd6 34. Ba4 Ne6 35. Bxc6 Nf4+ 36. Nxf4 exf4 37.
Bc5 h5 38. Bd5 Qc7 39. Qc4 Be5 40. b5 Qa5 41. Qb4 Qa1 42. b6 Kh7 43. b7 Bb8 44.
Qa3 Qb1 45. Qa8 Qb2+ 46. Bf2 Qe5 47. Qa5 f6 48. Qd8 Be8 49. Qc8 Kg6 50. Be6 Bb5
51. Qg8 f5 52. Qf7+ 1-0


[Event "2015 Canadian Closed"]
[Site "Guelph, Ontario"]
[Date "2015.07.12"]
[Round "5.5"]
[White "Cao, Jason"]
[Black "Gentes, Kevin"]
[Result "1/2-1/2"]
[ECO "C89"]
[WhiteElo "2439"]
[BlackElo "2353"]
[PlyCount "99"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Be7 7. O-O O-O 8. c3
d5 9. exd5 Nxd5 10. Re1 Qd6 11. Nbd2 Nf4 12. Ne4 Qg6 13. Bxf4 exf4 14. Kh1 Be6
15. d4 Rad8 16. Bxe6 Qxe6 17. a4 b4 18. Qd3 a5 19. Rad1 Qd5 20. c4 Qf5 21. b3
Bf6 22. d5 Nb8 23. d6 Bc3 24. Nh4 Qg4 25. Nxc3 Rxd6 26. Nd5 Qxh4 27. Qd4 Nc6
28. Qxf4 Qxf4 29. Nxf4 Nd4 30. Rd3 c5 31. Re5 Rc8 32. Ne2 f6 33. Re7 Re6 34.
Rxe6 Nxe6 35. g4 Rd8 36. Rxd8+ Nxd8 37. Kg2 Kf7 38. Kf3 Ke6 39. Ke4 Kd6 40. f4
g6 41. h4 Nf7 42. Ng3 Nh6 43. g5 f5+ 44. Kf3 Ng8 45. h5 Ne7 46. h6 Ke6 47. Ne2
Nc6 48. Ke3 Kf7 49. Kd3 Ke6 50. Ke3 1/2-1/2

[Event "2015 Canadian Closed"]
[Site "Guelph, Ontario"]
[Date "2015.07.13"]
[Round "6.4"]
[White "Gentes, Kevin"]
[Black "Noritsyn, Nikolay"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "2353"]
[BlackElo "2586"]
[PlyCount "148"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]

1. Nf3 d6 2. d4 g6 3. g3 Bg7 4. Bg2 c5 5. O-O cxd4 6. Nxd4 Qb6 7. Nb3 Nc6 8.
Nc3 Bxc3 9. bxc3 Bd7 10. c4 Qb4 11. Bb2 Nf6 12. c5 dxc5 13. Bxf6 exf6 14. Qd6
O-O-O 15. Qxf6 Qc4 16. Rfd1 Be6 17. Bxc6 bxc6 18. Qe5 Bd5 19. Na5 Qb4 20. Rxd5
cxd5 21. Nc6 Qb6 22. Nxd8 Rxd8 23. Rd1 Qe6 24. Qc3 Qc6 25. e3 h5 26. Qg7 Qe6
27. Qc3 Qb6 28. Qg7 Rd7 29. Qf8+ Kc7 30. c4 d4 31. exd4 cxd4 32. c5 Qb5 33. c6
Kxc6 34. Qc8+ Kd5 35. Qa8+ Ke6 36. Re1+ Kf6 37. Qh8+ Kf5 38. Qh6 Kf6 39. Qh8+
Kf5 40. Qh6 Qb8 41. Re8 Rd8 42. Re1 Kf6 43. Qd2 Kg7 44. Qd3 Qb2 45. Re2 Qc1+
46. Kg2 Qc6+ 47. Kg1 Rd7 48. h4 Kh7 49. Rc2 Qd5 50. Rd2 Re7 51. Rd1 a5 52. Kh2
Rd7 53. Rd2 Kg7 54. Kg1 Kg8 55. Kh2 Kh7 56. Kg1 Rc7 57. Rd1 Rc4 58. Kh2 Qc5 59.
Kg2 a4 60. a3 Kg7 61. Kh2 Kg8 62. Kg2 Kh7 63. Kh2 Qc6 64. Kg1 Kg8 65. Kh2 Kg7
66. Kg1 Qb5 67. Kg2 Qb7+ 68. Kg1 Qb3 69. Kf1 Qxd3+ 70. Rxd3 Kf6 71. Rf3+ Ke6
72. Ke2 f5 73. Rd3 Kd5 74. Kd2 Rc8 {Flag} 0-1

FM Kevin Gentes at the Canadian Closed - Rounds 1-3

Kevin won round 1, lost to IM Panjwani on round 2, and drew Kevin wan in Round 3.

[Event "2015 Canadian Closed"]
[Site "Guelph, Ontario"]
[Date "2015.07.10"]
[Round "1.9"]
[White "Manley, Jason"]
[Black "Gentes, Kevin"]
[Result "0-1"]
[ECO "C51"]
[WhiteElo "2164"]
[BlackElo "2353"]
[PlyCount "142"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bd6 6. d4 Nf6 7. O-O O-O 8. Re1
h6 9. Bd5 Re8 10. Nbd2 exd4 11. Bxc6 dxc3 12. Nc4 bxc6 13. e5 c2 14. Qd2 Ba6
15. Nxd6 cxd6 16. exf6 Rxe1+ 17. Nxe1 Qxf6 18. Nxc2 Re8 19. Ba3 Re2 20. Qd4
Rxc2 21. Qxf6 gxf6 22. Bxd6 Bd3 23. f3 c5 24. Rb1 c4 25. Rb8+ Kg7 26. a3 Bf5
27. Rc8 Be6 28. Kf1 Rd2 29. Bb4 Rd3 30. Ke2 d5 31. Rc7 d4 32. Rxa7 Re3+ 33. Kf2
c3 34. Rc7 Rd3 35. g4 Bd5 36. Rc5 Bxf3 37. h3 Be4 38. Rc4 Rd2+ 39. Kg3 Bd5 40.
Rc5 Rd3+ 41. Kf2 Bb3 42. Ke2 Rd2+ 43. Kf3 Rd1 44. Ke2 Rd2+ 45. Kf3 Bc2 46. Rc4
Bg6 47. a4 Rd1 48. Ke2 Ra1 49. Rxd4 c2 50. Bd2 c1=Q 51. Bxc1 Rxc1 52. h4 h5 53.
Kd2 Rc5 54. gxh5 Bxh5 55. Ke3 Bg6 56. Kd2 Bf5 57. Ke3 Be6 58. Kd3 f5 59. Rf4
Kf6 60. Rb4 Ke5 61. h5 Bd5 62. Rh4 Be4+ 63. Kd2 Rc2+ 64. Kd1 Rc8 65. h6 f4 66.
a5 Kf5 67. h7 Rh8 68. a6 Kg5 69. Rh2 Rxh7 70. Rxh7 Bxh7 71. Ke2 Be4 0-1

[Event "2015 Canadian Closed"]
[Site "Guelph, Ontario"]
[Date "2015.07.11"]
[Round "2.9"]
[White "Gentes, Kevin"]
[Black "Panjwani, Raja"]
[Result "0-1"]
[ECO "E05"]
[WhiteElo "2353"]
[BlackElo "2542"]
[PlyCount "106"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]
[TimeControl "40/5400+30:1800+30"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. d4 dxc4 7. Qc2 a6 8. Qxc4
b5 9. Qc2 Bb7 10. Bf4 Nc6 11. Rd1 Nb4 12. Qc1 Nbd5 13. Nc3 Rc8 14. Nxd5 Bxd5
15. Be3 Ng4 16. Ne1 Bxg2 17. Nxg2 Qd5 18. h3 Nxe3 19. Qxe3 Rfd8 20. Nf4 Qd6 21.
Rac1 c5 22. dxc5 Qxd1+ 23. Rxd1 Rxd1+ 24. Kg2 Bxc5 25. Qe4 Rd7 26. a4 Bf8 27.
axb5 axb5 28. Qe5 b4 29. Nd3 g6 30. b3 Rc3 31. Qb8 Rdxd3 32. exd3 Rxd3 33. g4
Rc3 34. g5 Rd3 35. h4 Rd5 36. f4 Kg7 37. Qb7 Bd6 38. Qb6 Bc5 39. Qb8 Rd2+ 40.
Kf1 Bf8 41. Kg1 Kg8 42. Qb5 Rb2 43. Qe5 Rb1+ 44. Kg2 Rxb3 45. Kh2 Rc3 46. Kg2
Rd3 47. Qe4 Rd5 48. Qc4 h5 49. Kh3 Ra5 50. Kg2 Ra3 51. Qc2 Rc3 52. Qd2 Rc4 53.
Kf3 b3 0-1

[Event "2015 Canadian Closed"]
[Site "Guelph, Ontario"]
[Date "2015.07.11"]
[Round "3.9"]
[White "Wan, Kevin"]
[Black "Gentes, Kevin"]
[Result "1/2-1/2"]
[ECO "C69"]
[WhiteElo "2302"]
[BlackElo "2353"]
[PlyCount "89"]
[EventDate "2015.??.??"]
[SourceDate "2015.07.10"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6 6. d4 Bg4 7. c3 Bd6 8. h3
Bh5 9. Be3 Ne7 10. Nbd2 O-O 11. Qc2 Qd7 12. Rad1 Kh8 13. Qd3 Qe6 14. b3 Rad8
15. Kh1 c5 16. dxe5 fxe5 17. Bg5 h6 18. Bh4 g5 19. Bg3 Ng6 20. Qd5 Qxd5 21.
exd5 e4 22. Nxe4 Rxf3 23. Nxd6 cxd6 24. gxf3 Bxf3+ 25. Kg1 Bxd1 26. Rxd1 Ne7
27. c4 Nf5 28. Re1 Kg7 29. Re6 Kf7 30. Kg2 h5 31. f3 b5 32. Be1 Re8 33. Rxe8
Kxe8 34. Bd2 bxc4 35. bxc4 Nh4+ 36. Kf2 Ng6 37. Bxg5 Ne5 38. Ke3 Nxc4+ 39. Ke4
Nb6 40. Bd2 Kf7 41. Bf4 Ke7 42. Bg5+ Kf7 43. f4 Nd7 44. Kd3 Nb6 45. Ke4 1/2-1/2

FM Kevin Gentes at the 2015 Canadian Closed

2015 Manitoba Closed Champion Kevin Gentes has travelled to the Canadian Closed in Guelph to vie for the Canadian Championship.

Kevin is the 13th ranked player by CFC rating  - it's a tough crowd that includes 2 GMs, 6 IMs, and 11 FMs.
#Name/Rtng/IDProv
1GM Bator SambuevQC

2642
2IM Razvan PreotuON

2636
3GM Eric HansenAB

2630
4IM Nikolay NoritsynON

2586
5IM Tomas KrnanON

2557
6IM Raja PanjwaniON

2542
7IM Leonid GerzhoyON

2538
8FM Jason CaoBC

2439
9IM Richard WangAB

2426
10FM Andrew PeredunON

2406
11FM Victor PlotkinON

2400
12FM Alex YamAB

2384
13FM Kevin GentesMB

2353

Cecil's Saturday Puzzle - July 11, 2015

from the Winnipeg Free Press
White to mate in 2 (Funk)
1. Qd5

Friday, July 3, 2015

Cecil's Saturday Puzzle - June 27, 2015

from the Winnipeg Free Press
White to mate in 2 (Funk)
1.Kf6