051209 0.3.2495
	--Tons of SMP work. Sort of.
	--Evaluation parameters have names now, easier to mess with.
031809 0.3.2491
	--Tons of SMP crap.
	--Statistics functioning properly.
	--EGBBs removed. Sorry everyone, I decided I did not want anyone else's
		code in ZCT.
111408 0.3.2486
	--More work on SMP.
	--More code cleaned up. PGN_FUNC changed to POS_FUNC, so that it's (mostly)
		transparent between PGN and EPD. So you can create a book from an EPD
		file or run a test suite from a PGN. Weird huh?
110608 0.3.2483
	--Damn, I haven't updated this in a while.
	--OK, it's ACTUALLY running stably on 4 processors now. It can play a
		f'in game now!! I'm working on the speedup now, creating a _real_
		benchmark function.
072208 0.3.2468
	--A flurry of tiny tweaks in an attempt to test everything. I'm going to
		concentrate more on raw strength right now I think, as most major
		features have been implemented and I have a solid testing scheme at
		last.
	--Some SMP stuff. It's running stably on 4 processors now, and it's actually
		getting a positive speedup, though it's low. I'm not sure if it's just
		the split point selection code that needs work, or if there's bugs, but
		I can feel a good speedup coming...
071608 0.3.2453
	--SMP bugfixes, bugs introduced................... yawn.
	--Pretty printing of PVs added.
	--stuff_pv() removed. Didn't seem to help, and was causing weird bugs.
	--TODO.txt added. All the old TODOs will stay in here for historical
		reasons, but new stuff (and all the current stuff) will be migrated
		there.
070908 0.3.2450
	--ZCT played in the 2008 ACCA WCRCC and got an amazing 11th
		place. Just as amazingly, it was able to run on 2 processors throughout
		the tournament without a crash.
	--Lots of SMP fixes. Cleaned up the SMP code in search(), and other places.
		Finally deleted insert(), as I don't feel like ever getting it to work
		and it's just cluttering up the code.
	--Windows compatibility for SMP added by Teemu Pudas: it uses threads!
	--EGBB path is now user-adjustable
	--Some code cleaned up, adjusted for 80-column displays, some more comments
	TODO:
	Fix SMP completely, fix hangs/scaling on more than 2 processors.
	Convert to threads?
	Finish work on the testing system. to automatically test new version. I'd
		like to also implement a distributed model to test on a network, and set
		up some old computers to test 24/7. Now that would be cool.
	Rewrite eval--this is long and arduous, but necessary. This is based on the
		last comment. I will go the ultra-solid route, and rewrite it piece by
		piece, tuning extensively as I go and testing everything thoroughly.
	UCI setoption
	Make a new NO_MOVE macro, to differentiate null moves
060308 0.3.2447
	--Bunch of eval tweaking, SMP fixing, etc.
	--Two huge eval bugs fixed. One from the past few weeks, the other from
		months and months ago (see the 112007 log entry to see what I mean).
		Thanks a ton to Fonzy Bluemers for spotting them!! They are too
		embarassing to describe in detail...
051908 0.3.2445
	--Big code restructuring. All of the non-constant global variables, apart
		from the process-local hash tables, were moved into a big struct. The
		code is a teensy bit messier due to the zct->s everywhere, but I think
		it is overall more clean in design.
	--Time usage tweaks
	--DTS bugfixes
	--Other bugfixes
	--Book updating implemented
	--Note to self: Rybka had played publicly at a pretty weak level before its
		infamous debut...
051108 0.3.2444
	--Bugs fixed. There were many that were lurking, only to be found by other
		people upon ZCT's release.
	--Semi-Path-Dependent hashing implemented, but possibly a failure. More
		tests are being conducted.
042808 0.3.2442
	--Bugs fixed: I've been working a lot on the SMP code, because since I've
		gotten a Q6600, I've found that many things don't work with 4 cpus. Who
		woulda thunk... It's coming together though.
	--More bugs fixed: I finally broke down and fixed the age-old PV hash move
		appending stuff.
	--Cool stuff: I got a freakin Q6600, I got accepted into the Google Summer
		of Code, and I set up a CVS repository for ZCT on sourceforge. If only
		everyone knew that ZCT is actually publicly available now...
	--ZCT leaked to the public!! Yes, less than 24 hours after the above
		sentence was written, the CVS archives were raided and exposed to the
		world. Oh well, I suppose I'll have to save my Rybka-like grand
		entrance for another game...
020808 0.3.2441
	--Eval stuff
	--Made tune_pgn_func
020708 0.3.2440
	--Eval
	--More bugs fixed. I'm trying to tune for the speedup in SMP, but something
		is making the nodes searched almost double, and the idle time is usually
		around 10+% of net CPU time.
	--Added insert capability
012908 0.3.2439
	--More bugs fixed...
	--Some Windows compatibility stuff, untested.
012808 0.3.2438
	--More bugs fixed, including a big one in SMP. Scores 296/300@60s.
		with 2x1.25GHz G4 PPC, 64M RAM
	--I slept through CCT...
	--Scorpio bitbases added by Teemu Pudas
	--Initialization file added
	TODO:
	book editing
	Windows
	License
	UCI
	PGN: pgn_func
	SMP: Change split() and find_split_point() so it finds a split point, add
		INSERT message
	Eventually soup up the debug interface to how it was originally envisioned
012208 0.3.2437
	--More bugs fixed, some in SMP.
	--Been playing on ICC for a little bit, not doing that well! I think it's
		just because I'm always playing people rated lower than me though.
	--The new makefile I made was messed up, and I fixed it.
011408 0.3.2435
	--Numerous bugs fixed: time control, pondering, eval, etc. etc. etc.
	--Code cleaned up more...
	--UCI pretty much completed, needs setoption stuff
	--A Windows compile was made without the standard timing, input, SMP etc.
		Hardly any code changes necessary, just wading through MS BS to make the
		compiler work.
	--I should get an ICC account soon.
	TODO:
	Setoption stuff mentioned
	DTS DTS DTS DTS DTS DTS DTS DTS DTS DTS
	Write a license
123107 0.3.2420
	--Code cleaned up.
	--Bugs fixed in DTS. Seems pretty stable with 2 processors, but more makes
		everything funny. Also the split point is not yet chosen by the idle
		processor, although it does look at the search states. I think the DTS
		code will have to be cleaned up.
	TODO:
	Finish UCI
	Clean up more code
	Take all useless features out of eval
121807 0.3.2418
	--Version numbering system tweaked a bit.
	--Many eval changes, king safety, piece evaluation, mobility, ...
	--Some search stuff
	--Tweaking. Strength has remained stagnant though...
112107 0.2.02392
	--From now on, I will only update the major changes, every few versions. The
		versioning system is going to create a lot of new version numbers, as
		you can see.
112007 0.2.0239
	--Many of the changes I have made recently seemed to hurt playing strength.
		I've since implemented a new versioning/testing scheme that I hope will
		alleviate this in the future.
111207 0.2.0238
	--UCI protocol work
	--progressive mobility experiments: worthless?
110507 0.2.0237
	--Changed SMP a bit. SMP_SPLIT is now a message, rather than an input. It
		caused some deadlocks. But the implementation of this still needs to be
		fleshed out...
	--In the same version, SMP_SPLIT is back to an input. I didn't really think
		that change through...
	--Do_null parameter removed. Now there are no recursive constraints on null
		moving.
	--Internal node evaluations now done. This is just to support future
		selective searching. Not much slowdown: about 5%.
	--Consolidated hash_probe and qsearch_hash_probe.
	--Eval work.
102207 0.2.0236
	--Notice all the new versions?
	--Work on SMP.
	--A couple of eval bugs fixed.
	TODO:
	Finally figure out why my stupid singular extensions aren't working. This is
		a problem I've been wrestling with for a few years now.
	I really need to finish DTS. Really.
101607 0.2.0235
	--Refactored the select_move interface. Now there is less repeated code.
	--Time control tweaks, now actually uses soft/hard time limits.
	--Rudimentary UCI interface added.
	--Now ZCT is beating GNUChess 5.07 in head-to-head competition. Estimated
		ELO is about 2400.
	--Autotuning implemented, but has not been utilized much yet. Basically just
		a comparison of evaluations on moves from a PGN.
	TODO:
	Endgame recognizers, including minimal mating material scoring
	Some selectivity in search, extensions and reductions based on components of
		the eval
100507 0.2.0234
	--I recently registered for the 10th CCT, and so I'm now in overdrive mode
		working on ZCT. Even though it's three and a half months away. I AM
		GOING TO WIN!!! (not really.) It would be cool to win a processor
		though.
	--Value type added
	--Changed to smooth opening-endgame transition.
	--More code cleaning up
093007 0.2.0233
	--Bugs! After implementing an evaluation symmetry test ("I couldn't possibly
		have symmetry bugs..."), I found a few nasty ones, some not even in the
		eval. Now it passes all the suites I throw at it. Some other stupid bugs
		were found recently, like how the value of extend() was not returned
		(don't know how that didn't show up...).
	--Some eval+search tuning
	--The book is basically complete.
	--ETC added
	TODO:
	Finish DTS
	Eval: passed pawns and king safety, endgame!! (Maybe a smooth
		opening-endgame transition?)
	Learning: eval tuning, book learning
	Maybe implement UCI, just as a proof-of-concept of my protocol interface
		design
091407 0.2.0232
	--Some eval tuning
	--Added a PGN reader and the start of a book
090807 0.2.0231
	--Added some king safety shelter code
	--New implementation of IID, by counting nodes of each individual move.
		Doesn't seem to help.
	--Another move sorting bug fixed: The move sorting function didn't take the
		score of the first move in the list into account, leading to bad sorting
		much of the time.
082607 0.2.0230
	--DTS coming along nicely. Some bugs included.
	--Stupid SEE bug fixed. attacked_piece was a PIECE rather than an int.
		Changed name to attacked_piece_value to make it a little clearer.
		Maybe should introduce a VALUE type?
	TODO:
	Time management
	Still working on that stuff...
081007 0.2.0229
	--SMP: In an effort to fully complete DTS search, the data structures were
		radically changed to accomodate more than one split point per process.
		This involved adding a message queue to each process for asynchronous
		commands, and taking away all message passing done at split point level.
	--Various cleaning up around the code, to get ready for an open source
		release (one main goal is to be the first open source DTS
		implementation)
	TODO:
	Finish DTS search
	Release!
	Oh yeah, all that other stuff from last version
062507 0.2.0228
	--Some work on the debugger.
	--Search changes (IID, Null move, hash tables, checks in qsearch, etc.)
	--Check evasion generator
	TODO:
	Opening book still
	More eval: progressive mobility, passed pawns, king safety
	Search: extensions, reductions, eval stuff, qsearch null move?
042507 0.2.0227
	--Forgot about this file. These changes and the ones from 0.2.0228 are from
		memory.
	--EPD test support
	--Probably other stuff lost to the sands of time...
102806 0.2.0226
	--Changed from bitboard+0x88 to bitboard+64. I didn't really use the 0x88
		anyways.
	--Eval
	--Bugfixes
	--Added nodetypes: NODE_PV, NODE_SINGULAR, NODE_ALL, NODE_CUT
	--Removed null-move and fail soft cpp switches
	--Separated smp.c into smp.c and smp2.c
100906 0.2.0225
	--Added analysis and pondering
	--Debugger is coming along slowly...
	--Eval stuff
100506 0.2.0224
	--Separate capture generator
	--Pawn and eval hashtables
	--Evaluation changes
	--Perft hashtable, changed counter to 64 bit
	--Search debugger
	TODO:
	Opening book
	Analysis, pondering
	PGN and EPD support
091806 0.2.0223
	--Added Changes.txt :)
	--pv_stack converted into 2-dimensional array. This was mainly to simplify
		unsplitting in the SMP search, as the in the previous method the PV at a
		certain ply was aligned to come right after the previous ply's, and when
		the split point had a different sized PV, everything below it had to be
		shifted. It also means one less parameter to search_call, and no
		pv_start or pv_end in the SEARCH_BLOCKs.
	--Static Exchange Evaluator added, inefficient.
	--Experiments in "delta" pruning
	--Eval changes
	--Move ordering: killers, counter moves
	--New print function, custom format specifiers
	--SMP: Added full update capability, so changes of alpha at a split point
		propagate up the tree, reducing work.
	TODO:
	Eval: doubled pawns, passed pawns
	Restructure code: search.h, another smp file, etc.
	Qsearch: checks, stand pat, null move
	SMP: More portable code, asm spinlocks
	SEE: replace with attack table? add pins?
