I use to have Sjeng and played zh against it. I have to say it was the strongest of the zh engines. I think that I use to pull 3-4 out of 5 games but I was around 2500ish zh at the time. I wish this site had zh.
Sjeng
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zh?
Yeah, I have no clue what zh is, either. Reading Crosshaven's profile, maybe it's something on the FICS server?
zh is the FICS abbreviation for crazyhouse, a chess variant where you can place the pieces you've captured on the board, converted to your color (for instance, you capture a black knight, you can use a turn to place a white knight on any square). If you know what bughouse is, think of it as single-board/two-player bughouse.
Thanks PO, that clears that up. 
Sjeng
About Sjeng
Sjeng chess engine is developed and created by Gian – Carlo Pascutto with origin from Belgium. His engine is championship winer with automated chess engine. Sjeng has ability to use multiple computer processors and able to varies between few chess games, like Chess960, crazyhouse and giveaway chess games. Since Mac OS X version 10.4 early open sourced version of Sjen was used for Mac OS X Chess app. In 2008 Sjeng win at the World Computer Speed Chess Championship and in 2009 it take a win on World Computer Chess Championship and also in 2010 and 2011 Sjen engine was a winner of Internet Computer Chess Torunament. The engine also successfully has beaten all engines rated with 2600 points and few Grand Master chess players. Particular Version of this engine also took first place in crazyhouse players list which was announced on the Internet Chess Club and also first placed on the list announced by Free Internet Chess Server. His crazyhouse playing rating is moving around 2300 points, slightly worst results Sjeng shows in bughouse rating with score around 2000 points with its maximum at 2200 points. When it comes a word about Sjeng’s standard chess rating is around 2450 ELO points.
Deep Sjeng
Latest version of Deep Sjeng is Deep Sjeng 3.x and this version is the third version of the series of Deep. This version has a great improves in his strength then his ancestors, with faster and deeper search and also greater and longer range of planning and also improved understanding of figures that are active playing. Deep Sjeng 3.x also shows more knowledge in endgames and great understanding in dynamic compensation of figures from the board. Deep Sjeng 3.0 is around hundred ELO points better and stronger than his ancestor Deep Sjeng 2.7. Enhanced version of Deep Sjeng 3.0 is the version named WC2008 which is also the winner of the World Computer Speed Chess Championship in 2008. This version is free update and comes with news features for customers.
Deep Sjeng Features
Deep Sjeng has strength class which is on top of the engines lists. This particular engine is made to support multiprocessors like the SMP, dual core and also quad core, and supports up to eight processors at same time, which is great feature when you need upgraded speed. With the mentioned version also came full completed and adjustable and different level of difficultness, from which players could choose. This engine also is made to support Universal Chess Interface version 1.0 and version 2.0, also its made to be compatible with already made chess Graphic User interfaces and databases for chess engines and chess games.
Summary:
All the versions of Deep Sjeng are developed and made to be used with multiprocessor computers, which allows the version to increase its speed. Deep Sjeng is made to be used on different UCI so the players could choose which UCI they want to play Deep Sjeng on. For the end maybe Deep Sjeng is not on the top of the world ranked list but it also has great features worth to try.