[Event "GameKnot Blitz"]
[Site "gameknot.com/"]
[Date "2013.04.10"]
[Round "-"]
[White "lapaget"]
[Black "dryvel"]
[Result "1/2-1/2"]

{A real game }
1. e4 Nf6 2. Nc3 d6 3. Nf3 Bg4 4. Be2 Nc6 5. d4 e6 6. e5 dxe5 7. dxe5 Bxf3 8. Bxf3 Qxd1+ 9. Nxd1 Nxe5 10. Bxb7 Rd8 
11. O-O Bd6 12. Ne3 O-O 13. b3 Rb8 14. Ba6 Nc6 15. Bb2 Nd5 16. Nc4 Ncb4 17. Nxd6 cxd6 18. c4 Nc7 19. Bb5 Nxb5 20. cxb5 Rxb5 
21. Ba3 Rd8 22. Rfc1 d5 23. Rc7 a5 24. Bxb4 Rxb4 25. Rac1 d4 26. Rc8 Rf8 27. R8c4 Rxc4 28. Rxc4 e5 29. Kf1 f5 30. Rc5 Re8 
31. Rxa5 d3 32. Ke1 g6 33. Kd2 e4 34. Ra4 Rc8 35. Rc4 Rxc4 
36. bxc4  { Who stands better? }
Kf7 37. a4 Ke7 38. c5  { Pattern #26: two passed pawns one file apart block the King to avoid promotion}

Kd7 39. a5 Kc7 { the pawns stay on the same rank, and if the King tries to attack one, the other advances }
40. f3 { Trying to trade pawns and then capture d3 }

Kc6 { Never will Black capture exf3?  Black tries to attack c5, to check if White knows what to do}
41. a6  { White advances the other pawn, if black King captures c5, White promotes }
h5 42. fxe4 { ? The hour was late. The result is Pattern #25: two connected passed pawn, which block white King to move between d2 and d3 }

fxe4 43. h4 { Pattern #46: one pawn blockes two }

Kc7 44. Ke3 Kc6 45. Kd2 Kc7 
 { The additional pawn g2 is of no use.A draw was mutually agreed, as no player can get an advantage } 1/2-1/2

[Event "Pattern 26"]
[Site "FCP"]
[Date ""]
[Round ""]
[White "Winner"]
[Black "Loser"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/8/4k3/2P1P3/8/8/8/6K1 w - - 0 1"]
[PlyCount "13"]

1. c6 Ke7 2. Kf2 Ke6 3. Ke3 Ke7 4. Kf4 Kd8 5. e6 Ke7 6. c7 Kxe6 7. c8=Q+ 1-0

[Event "Reykjavik (Iceland)"]
[Site "Reykjavik ISL"]
[Date "1990.03.??"]
[EventDate "?"]
[Round "?"]
[Result "1/2-1/2"]
[White "Alexey Dreev"]
[Black "Richard Wessman"]
[ECO "D45"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "154"]

1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 Bd6 7.Be2
O-O 8.O-O dxc4 9.Bxc4 e5 10.Bb3 Qe7 11.h3 Bc7 12.Bd2 h6 13.Nh4
exd4 14.exd4 Qd6 15.Nf3 Nb6 16.Rfe1 Nbd5 17.Rac1 Be6 18.Na4
Rad8 19.Nc5 Bc8 20.a3 Nf4 21.Ba2 N6d5 22.Ne5 Qf6 23.Bb1 g6
24.Ne4 Qg7 25.Ba2 Bf5 26.Qb3 Bb6 27.Nc5 Be6 28.Qg3 Bxc5
29.Rxc5 g5 30.h4 gxh4 31.Qxg7+ Kxg7 32.Ra5 a6 33.Nf3 Ng6
34.Bb1 Rfe8 35.Rc5 Bg4 36.Ne5 Nxe5 37.dxe5 f6 38.Rc4 Bc8
39.Rxh4 Rxe5 40.Bxh6+ Kf7 41.Rxe5 fxe5 42.Bg5 Nf6 43.Bc2 Rg8
44.Bd2 Be6 45.f3 Ke7 46.Bb4+ Kd7 47.Kf2 Rg7 48.g4 Nd5 49.Bd2
c5 50.Rh5 Kd6 51.Kg3 b5 52.Bh6 Rf7 53.Bg6 Rf6 54.Be4 Nf4
55.Rh2 Bd5 56.Bg5 Rf7 57.Rh6+ Ne6 58.Bf6 Bxe4 59.fxe4 c4 60.g5
Nc5 61.Kf3 Nd7 62.Kg4 Nxf6+ 63.Kf5 a5 64.Rxf6+ Ke7 65.Kxe5
Rxf6 66.gxf6+ Kf7 67.Kd4 Kxf6 68.Kc5 Ke5 69.Kxb5 Kxe4 70.Kxa5
Kd4 71.Kb4 Kd5 72.a4 c3 73.bxc3 Kc6 74.c4 Kb6 75.c5+ Ka6 76.c6?? {blunder}
Kb6 77.a5 Kxc6 1/2-1/2

Two pawns one file apart

Pattern # 26 This technique is explained in ebook Fundamental Chess Patterns

Two pawns one file apart bock a King to avoid promotion

Additional different patterns can be found on this page of mine: Patterns

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