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	The BitBoard Crew
		It was at Boot Camp where I met Kidd and his producer, JB Hager who were starting up Bitboard; as well as many of you who eventually became Bitboard members.
		I’ve seen many changes on Bitboard over the last 10 years; but, the one thing that remains constant is that Philip, Harmon, Erica and I all really want to see you all succeed and will do whatever possible to help you make that happen.
		Anyway, I guess he liked me, and he showed me the world of BitBoard after about a year (had to figure out if I was a stalker or something).
	www.bitboard.com /crew.htm (917 words)

	Games - Bitboard
		A bitboard, often used for boardgames such as chess, checkers and othello, is a type of data structure and bitset, where each bit represents a game position or state, designed for optimization of speed and/or memory or disk use in mass calculations.
		Bitboards are interesting because they allow the computer to answer some questions about game state with one logical operation.
		The bitboard method for holding a board game appears to have been invented in the mid 1950's, by Arthur Samuel and was used in his checkers program.
	listing-index.ebay.com /games/Bitboard.html (851 words)

	Bitboard Review
		The state of the chessboard can't be represented with just a single bitboard, in fact, Cassandre uses a total of twelve bitboards to represent the locations of all the pieces (six bitboards for each player).
		The bitboards that begin with w_ keep track of the white pieces and the bitboards that begin with b_ keep track of the fl pieces.
		The piece bitboards have 1's in the positions that correspond to the locations of that particular piece.
	web.umr.edu /~cs347a/sp2005/chess/BitboardReview.html (826 words)

	Rotated Bitboards
		So now I have a structure of bitboards for each ply to record every move in a line of the search to a maximum depth of MAXPLY which in Atlanchess is 30.
		There are four bitboards that hold the positions of all the pieces, three of which are rotated.
		Shifting the bitboard by the correct number of bits allows us to AND the result with 63 and isolate the bits we are interested in.
	atlanchess.com /html/rotated_bitboards.html (2324 words)

	BitBoard - Free Trial
		Bitboard is the largest sharing network of the most talented and creative morning shows in the country, with over 350 shows on 4 different market exclusive boards.
		We also offer a Daily Planning Calendar with archived special event files, and phone contacts from 12 years of Bitboard reports.
		Bitboard is a barter service available only to stations in the US.
	www.bitboard.com /freetrial2.htm (275 words)

	An Introduction to BITBOARDS
		A bitboard is a 64 bit length variable, and as you know 64 is a ‘magic number’ both in chess and in computer science.
		Now we can try to build our first bitboard: a bitboard that will represent all the white pieces in the initial position of the chessboard.
		A bitboard that will be associated with all the knights (both white and fl) in the initial position of the chess board will be:
	www.fzibi.com /cchess/bitboards.htm (646 words)

	Bitboard
		The bitboard appears to have been originally developed by the KAISSA team in the Soviet Union in the late 1960s.
		A bitboard is a 64-bit sequence of bits (0 or 1), which indicates the absence or presence (false or true) of some state about each place on the board.
		With this bitboard it's easy to determine rook attacks across a rank, using a table indexed by the occupied square and the occupied positions in the rank (because rook attacks stop at the first occupied square).
	www.teachersparadise.com /ency/en/wikipedia/b/bi/bitboard.html (461 words)

	AI Horizon: Chess Board Representation
		Each bitboard can only have values of true and false (1's and 0's), so you would have multiple bitboards, and each bitboard would keep track of one aspect of the board position.
		For instance, one bitboard could keep track of all empty squares, another could keep track of all White rooks, another for all White pawns, another for all Black bishops, and so on.
		Then, to decide which moves are blocked by Black's own pieces, you take a bitboard of all of Black's pieces, take the complement (the NOT operator) and then AND it to your knights' moves bitboard.
	www.aihorizon.com /essays/chessai/boardrep_print.htm (712 words)

	[No title]
		For example, 12 bitboards are sufficient to describe the whereabouts of all the pieces for both sides, i.e.
		BitBoard board.b[2][6]; So for example with a knight equal to 2 and white equal to 0 all the knights are located by the reference #define white 0 #define knight 2...
		Bitboards in this version of GNU are defined using the "BitBoard" typedef defined in common.h.
	www.delorie.com /gnu/docs/gnuchess/README (1881 words)

	Chess Boards Using Bits - GameDev.Net Discussion Forums
		Rotated bitboards are the most common method of generating attacks and legal moves.
		The basic themes are that you can do bitwise set operations, and also shift and mask off parts of bitboards (for instance, mask off 8-bits representing a rank), then stick that 8-bit value into a lookup table and output whatever you feel like sticking in the lookup table.
		Both bitboards and "smaller" board schemes reference only a few cache lines, and other memory accesses by the engine (transposition tables, tree) are likely to kick them out.
	www.gamedev.net /community/forums/viewreply.asp?ID=1670067 (1751 words)

	Bitboard Comparisons in VB6 - Xtreme Visual Basic Talk
		I'm not planning on trying to set up bitboards, but from the wikipedia description I would think that you would use, in VB6, a pair of Longs (32-bits each) to represent the 64-bit board.
		As for the logic behind using the bitboards in evaluating chessboard positions, I would think there is a fair amount of reading to do, probably whole books on it.
		I assume, as I stated earlier, that you need to decide what functions are required to use bitboards (and you say your quite familiar with the logic of bitboards), and write those functions.
	www.xtremevbtalk.com /showthread.php?goto=lastpost&t=270918 (2301 words)

	Bitboard at AllExperts
		Bitboard source code is very dense and generally hard to read.
		Adding bitboards rotated 45 degrees and 315 degrees produces bitboards in which the diagonals are easy to examine.
		The Rotated bitboard is hard to understand if one doesn't have a firm grasp of normal bitboards and why they work.
	en.allexperts.com /e/b/bi/bitboard.htm (1937 words)

	AI Horizon: Chess Board Representation
		By far one of the most innovative representations is the bitboard.
		Thus, the bitboard -- as it is known -- was born.
		The resulting bitboard contains all of the possible moves of Black's knights.
	www.aihorizon.com /essays/chessai/boardrep.htm (719 words)

	How NagaSkaki plays chess
		First Generate a bitboard of all squares occupied by pieces.
		Next all the bits, except those in the direction we want to move (left, right, up and down for rook), are deleted.
		bitboard leftboard = (occupiedboard & rookXrays[sq][2]); //rookXrays[sq][2] is all bits to the left of rook
	www.geocities.com /nagaskaki/nagaskaki_chess.html (298 words)

	Wikinfo \| Bitboard
		A bitboard is a boolean set numbering 32 for checkers and 64 for chess, that indicate the absence or presence of some state about each piece or square on the board.
		Adding bitboards rotated 45 degrees and 315 degrees produces bitboards where the diagonals are easy to examine.
		Rotated bitboards should be viewed as a clever but advanced optimization.
	www.wikinfo.org /wiki.php?title=Bitboard (766 words)

	How NagaSkaki plays chess
		Precalculate a bitboard for all squares with the square in front of the pawn set (move one forward) AND this board with the empty_squares bitboard to generate a one move forward bitboard.
		Precalculate a bitboard for all squares with the square two squares in front of the pawn set (if the pawn is on the second row.) AND this board with the empty_squares bitboard ONLY if step 1 above generated a valid move.
		Things get a bit more difficult with the sliding pieces (rook, bishop and queen), because their moves will be stopped by the first piece on a file, rank or diagonal.
	www.mayothi.com /nagaskakichess6.html (985 words)

	ONJava.com -- Bitwise Optimization in Java: Bitfields, Bitboards, and Beyond
		In contrast, the bitboard structure is made up of twelve 64-bit bitsets; one for each type of piece.
		An advantage of bitboards is that we can use masks to answer a lot of typical chess questions.
		Rotated bitboards were invented by Robert Hyatt, who no longer does chess research but still maintains crafty.
	www.onjava.com /pub/a/onjava/2005/02/02/bitsets.html?page=2 (2650 words)

	GameDev.net -- Chess Programming Part II: Data Structures
		For example, one bitboard might contain the answer to "Is there a white piece here?" for each square of the board.
		Therefore, the state of a chess game could be completely represented by 12 bitboards: one each for the presence of white pawns, white rooks, fl pawns, etc. Adding two bitboards for "all white pieces" and "all fl pieces" might accelerate further computations.
		You might also want to hold a database of bitboards representing the squares attacked by a certain piece on a certain square, etc.; these constants come in handy at move generation time.
	www.gamedev.net /reference/programming/features/chess2/page3.asp (469 words)

	[No title] (Site not responding. Last check: )
		Other important bitboard operations enjoy marvelously simple yet non-obvious formulations due to the wonders of binary subtraction and the two's complement.
		Two famous members of this class are the expressions (b & -b) which clears all but the least significant 1-bit of a bitboard and (b & (b - 1)) that clears only the least significant 1-bit.
		This clever find-bit implementation further exploits the fact that the number of the least significant 1-bit of a bitboard is equal to the number of the most significant 1-bit of the bitboard xor'ed with itself minus one: FIND LSB(b) = FIND MSB(b ^ (b - 1)).
	wannabe.guru.org /ccc/m1999.01/38201.txt (696 words)

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