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What is the longest DTM in the endgame queen and two pawns versus a queen (KQPPKQ? This position is a mate in 167 moves.
[FEN "8/k7/6K1/1Q6/8/P6q/7P/8 w - - 0 1"]
Are the DTC and/or DTZ records also known for this endgame? Please do not only submit the number of moves, but also the position.
This page claims that the longest DTM in this type of endgame is 182 moves.
8/4k3/8/Q7/8/7P/P7/q1K5 w - - 0 1
1. Kc2 Qd4 2. Qe1+ Kf7 3. Qf1+ Kg7 4. Qg2+ Kh8 5. Qa8+ Kh7 6. Qb7+ Kh6 7. Qc6+ Kh5 8. Qe8+ Kg5 9. Qg8+ Kh6 10. Qe6+ Kh7 11. Kb3 Qd3+ 12. Kb4 Qd2+ 13. Kb5 Qd3+ 14. Qc4 Qf5+ 15. Kb6 Qf2+ 16. Kb7 Qf3+ 17. Kc7 Qa3 18. Kb6 Kh8 19. Qd4+ Kh7 20. Qd7+ Kg6 21. Qe6+ Kh5 22. Qd5+ Kg6 23. Kb5 Qb2+ 24. Kc6 Qc3+ 25. Kd7 Qg7+ 26. Kd6 Qf8+ 27. Kc7 Qf2 28. Kc6 Qe2 29. Kd7 Qf2 30. Qe6+ Kg7 31. Kc6 Qf3+ 32. Kb6 Qa3 33. Qb3 Qd6+ 34. Ka7 Qc5+ 35. Kb7 Qe7+ 36. Ka8 Qd8+ 37. Qb8 Qh4 38. Qb7+ Kf8 39. Qc8+ Ke7 40. Kb8 Qa4 41. Qc5+ Kd8 42. Qg5+ Ke8 43. Qe3+ Kf8 44. Qf3+ Ke7 45. a3 Qc4 46. Ka7 Qd4+ 47. Kb7 Qd7+ 48. Kb6 Qd4+ 49. Kb5 Qb2+ 50. Kc5 Qc2+ 51. Kd5 Qd2+ 52. Ke4 Qc2+ 53. Kf4 Qc7+ 54. Ke3 Qa7+ 55. Ke2 Qa6+ 56. Kf2 Qd6 57. Kf1 Qd4 58. Ke2 Qa4 59. Qc3 Ke8 60. Kf3 Qh4 61. Qc8+ Ke7 62. Qg4 Qf6+ 63. Qf4 Qa1 64. Qe3+ Kf8 65. Kg2 Qb1 66. Qf4+ Kg8 67. Qc4+ Kh8 68. Qd4+ Kg8 69. a4 Qg6+ 70. Kf2 Qf5+ 71. Kg3 Qg6+ 72. Kf4 Qf7+ 73. Kg5 Qe7+ 74. Qf6 Qd7 75. Qg6+ Kh8 76. Qh5+ Kg7 77. Qg4 Qd5+ 78. Qf5 Qd8+ 79. Kf4 Qd2+ 80. Kg3 Qe3+ 81. Qf3 Qg1+ 82. Kf4 Qc1+ 83. Kg4 Qc4+ 84. Qf4 Qe6+ 85. Kf3 Qb3+ 86. Kf2 Qb6+ 87. Kg3 Qg6+ 88. Kh4 Qh7+ 89. Kg4 Qg6+ 90. Qg5 Kh8 91. Kf4 Qf7+ 92. Qf5 Qc4+ 93. Qe4 Qc1+ 94. Kf5 Qc8+ 95. Qe6 Qc2+ 96. Kf6 Qf2+ 97. Ke7 Qc5+ 98. Qd6 Qa7+ 99. Qd7 Qc5+ 100. Ke6 Qc4+ 101. Ke5 Qc5+ 102. Ke4 Qc2+ 103. Kd5 Qd1+ 104. Ke6 Qe1+ 105. Kd6 Qb4+ 106. Kc7 Qf4+ 107. Kb6 Qb8+ 108. Kc5 Qe5+ 109. Qd5 Qe7+ 110. Kb6 Qb4+ 111. Qb5 Qd4+ 112. Kb7 Qe4+ 113. Kc8 Qe6+ 114. Kb8 Qg8+ 115. Ka7 Qg7+ 116. Ka8 Qg2+ 117. Qb7 Qxh3 118. a5 Qc3 119. a6 Qc4 120. Qb2+ Kh7 121. Qb6 Qc8+ 122. Ka7 Qc4 123. Kb7 Qe4+ 124. Qc6 Qb4+ 125. Ka7 Qf4 126. Qc8 Qg3 127. Ka8 Qd6 128. Qc2+ Kh6 129. Kb7 Qb4+ 130. Kc6 Qa3 131. Kb5 Kg7 132. Qc7+ Kh8 133. Qc8+ Kh7 134. Qd7+ Kg8 135. a7 Qb3+ 136. Ka6 Qa3+ 137. Kb7 Qb4+ 138. Kc7 Qc4+ 139. Kd8 Qh4+ 140. Qe7 Qd4+ 141. Kc8 Qc4+ 142. Kb8 Qb5+ 143. Qb7 Qe5+ 144. Ka8 Qc5 145. Qb3+ Kf8 146. Kb7 Qe7+ 147. Ka6 Qd6+ 148. Qb6 Qd3+ 149. Kb7 Qd7+ 150. Ka8 Qd5+ 151. Kb8 Qe5+ 152. Kb7 Qe4+ 153. Qc6 Qe7+ 154. Kb8 Qe5+ 155. Ka8 Kg8 156. Qc4+ Kh7 157. Qd3+ Kh8 158. Qd8+ Kh7 159. Kb7 Qb5+ 160. Qb6 Qd5+ 161. Qc6 Qb3+ 162. Kc7 Qg3+ 163. Qd6 Qc3+ 164. Kd7 Qf3 165. Kc8 Qe4 166. Kb8 Qb1+ 167 Kc7 Qc1+ 168. Kd7 Qh1 169. Qc6 Qh3+ 170. Kd8 Qh4+ 171. Kc8 Qb4 172. Qb7+ Qxb7+ 173. Kxb7 Kg7 174. a8=Q Kg6 175. Kc7 Kf5 176. Qa4 Ke5 177. Qg4 Kd5 178. Qf4 Kc5 179. Qe4 Kb5 180. Qd4 Ka5 181. Kc6 Ka6 182. Qb6#
According to the Sygyzy tablebases, the longest DTZ is 171 moves.
8/K6k/8/8/P7/Q6P/8/1q6 b - - 0 1
Records for DTC are not provided and I was not able to find any. DTC in this case occurs at 173, which is pretty high and a good estimate for a possible record holder (given the maximum DTM is at 182).
