Since some time LGPGNVER has a possibility to detect blocked positions. Many people told me that it is not necessary feature because such positions will never be reached in games between programs. But finally here is an real example, where LGPGNVER helped to award a draw:

[Event "Computer chess game"]

[Site "LYAPKO"]

[Date "2004.12.15"]

[Round "2"]

[White "Leila_053h"]

[Black "Quark v2.35Paderborn"]

[Result "0-1"]

[TimeControl "1800"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 8.

Nc1 e5 9. d5 Nd4 10. N1e2 Nxe2 11. Bxe2 Nh5 12. Qd2 Rb8 13. O-O-O f5 14.

Kb1 Nf4 15. Bf1 b6 16. g3 Nh5 17. Be2 Nf6 18. Bg5 Qe8 19. Bd3 fxe4 20. Nxe4

Nxe4 21. Bxe4 Bf5 22. Qe2 Bxe4+ 23. fxe4 Qf7 24. Rhf1 Qd7 25. g4 Rxf1 26.

Rxf1 Rf8 27. h3 Rxf1+ 28. Qxf1 c5 29. Be3 b5 30. Kc2 h5 31. gxh5 gxh5 32.

Kc3 Qd8 33. b3 bxc4 34. Kxc4 Qa5 35. Qg2 Qb4+ 36. Kd3 Qe1 37. Qg1 Qxg1 38.

Bxg1 Bh6 39. a4 Kf7 40. Be3 Bxe3 41. Kxe3 Ke7 42. a5 Kf6 43. h4 Ke7 44. Ke2

Kd7 45. Ke3 Ke7 46. Ke2 Kd7 47. Kf3 Kd8 48. Kf2 Kd7 49. Kf3 Kd8 50. Kg2 Kd7

51. Kf2 Kd8 52. Ke1 Kc8 53. Kd1 Kc7 54. Ke1 Kc8 55. Kf1 Kd8 56. Kf2 Kd7 57.

Ke2 Kc7 58. Kd2 Kd8 59. Kd3 Kd7 60. Kc3 Kc7 61. Kd2 Kd8 62. Kc1 Kc7 63. Kd1

Kd7 64. Ke2 Kc7 65. Kd3 Kd7 66. Kc2 Kd8 67. Kc3 Kc7 68. Kb2 Kd7 69. Kc2 Kd8

70. Kc1 Kc7 71. Kd1 Kd7 72. b4 cxb4 73. Kc1 Kd8 74. Kb2 Kd7 75. Kb3 Ke7 76.

Kxb4 Kd7 77. Kc3 Ke7 78. Kd3 Kf6 79. Ke3 Kf7 80. Ke2 Ke7 81. Ke3 Kf7 82.

Kd3 Kf6 83. Ke2 Ke7 84. Ke1 Kd7 85. Kd1 Kd8 86. Kc2 Ke7 87. Kb3 Kd8 88. Kb4

Kd7 89. Kc4 Kd8 90. Kb3 Kd7 91. Kc2 Ke7 92. Kc3 Kd7 93. Kd2 Kd8 94. Kd3 Ke8

{Black wins on time} 0-1

Draw awarded according to LGPGNVER: the position is blocked and nobody can win.