The Konoval-Bourzutschky team have once again raised the DTZ-record for chess endgames. DTZ == Depth to (move-count) Zeroing (move), i.e. a P-push/capture/mate It stood at (KRNKNN) maxDTZ = 243 for some years, after Stiller's work on the Connection Machine at M.I.T. YK-MB raised it to 290, (317), 333 and now ... 517. MB announcement is at http://216.25.93.108/forum/viewtopic.php?t=2860 Krabbe rendition at http://www.xs4all.nl/~timkr/chess2/diary.htm Item 317 for the 517-mover Item 311 for the 330-mover and the 317-mover Item 298 for the 290-mover MB's announcement also includes the find of the first known full-point mutual zugzwang position not involving Knights or Pawns. MB notes that maxDTZ has more than doubled with the addition of each man: KRK 16 - KBNK 33 - KNNKP 81 - KRNKNN 243 - KRBNKQN 517 Guy