Jud McCranie wrote:
Is there any term for the exchange of a queen for rook? Since these
are major pieces, it seems to me that "major exchange" would be a good
term.
--

I've never heard a term for it, but it's a timely question. Last week
at the Pamplona tournament, Morozevich was unable to win a queen vs.
rook ending against Jakovenko. Had Morozevich won that game he would
have had 6.5/7 instead of a mere 6.

Moro probably missed several wins earlier, but in any event it was a
remarkable case of long and heroic defense by Jakovenko:

[Event "XVI Magistral A"]
[Site "Pamplona ESP"]
[Date "2006.12.27"]
[Round "5"]
[White "Morozevich,A"]
[Black "Jakovenko,D"]
[Result "1/2-1/2"]
[WhiteElo "2747"]
[BlackElo "2671"]
[EventDate "2006.12.22"]
[ECO "E39"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. a3 Bxc5 7. Nf3
b6 8. e4 Nc6 9. Bd3 Ng4 10. O-O Qc7 11. Nb5 Qb8 12. h3 Nge5 13. Nxe5
Nxe5 14. Be2 a6 15. Nc3 Qc7 16. Kh1 Bb7 17. f4 Nc6 18. Bd3 Nd4 19. Qd1
f5 20. b4 Be7 21. Bb2 fxe4 22. Bxe4 Nf5 23. Qd3 Bxe4 24. Nxe4 Rac8 25.
Rac1 Qb7 26. Kh2 d5 27. cxd5 Qxd5 28. Qe2 Rxc1 29. Rxc1 Nd6 30. Rc7 Rf7
31. Nc3 Qf5 32. Bc1 b5 33. Rc6 Bf8 34. Rxa6 Rc7 35. Bd2 Nc4 36. Be1 Rd7
37. Nxb5 Nd6 38. Nc3 Qxf4+ 39. Bg3 Qc4 40. Ra8 Qxe2 41. Nxe2 Kf7 42.
Nd4 Nc4 43. Nc6 Bd6 44. Bxd6 Rxd6 45. b5 Rd5 46. a4 e5 47. Ra7+ Ke6 48.
Rxg7 Kd6 49. Rxh7 e4 50. Rh4 Nd2 51. Rh6+ Kc5 52. Re6 e3 53. g4 Rd3 54.
Kg3 Ra3 55. Kf4 Nf1 56. Re4 Ra2 57. Nd4 Rf2+ 58. Ke5 Nd2 59. Ne6+ Kb6
60. Rxe3 Nc4+ 61. Kd4 Nxe3 62. Kxe3 Ra2 63.
g5 Ra3+ 64. Kf4 Rxh3 65. g6 Rh8 66. g7 Rg8 67. Ke5 Ka5 68. Kf6 Kxa4 69.
Nd4 Rd8 70. Ke7 Rxd4 71. g8=Q Kxb5 72. Qc8 Rd5 73. Ke6 Rd4 74. Ke5 Rd3
75. Qc2 Rd8 76. Qb3+ Kc5 77. Qc3+ Kb5 78. Ke6 Kb6 79. Qc4 Rg8 80. Qd4+
Kc6 81. Qc3+ Kb5 82. Kd6 Rg6+ 83. Kc7 Rg4 84. Qc6+ Kb4 85. Qd6+ Kc3 86.
Kc6 Rd4 87. Qa3+ Kd2 88. Kc5 Re4 89. Kd5 Rg4 90. Qf3 Rb4 91. Kc5 Ra4
92. Qf6 Kd3 93. Qd6+ Ke3 94. Qg3+ Ke2 95. Qc3 Rf4 96. Kd5 Rg4 97. Ke5
Rh4 98. Kf5 Kf2 99. Qd3 Rh7 100. Qd4+ Kf3 101. Kg5 Rh2 102. Qf4+ Kg2
103. Kg4 Kg1 104. Qd4+ Kg2 105. Qd3 Kg1 106. Qe3+ Kf1 107. Qc1+ Kf2
108. Qd2+ Kg1 109. Qe1+ Kg2 110. Qg3+ Kh1 111. Kf3 Rf2+ 112. Ke3 Re2+
113. Kd3 Rd2+ 114. Kxd2
1/2-1/2


LT