QuickTime 2.0 Developer Kit

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MacBinary | 1994-10-25 | 4.2 MB | [ONLN/HLX2]
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MacOS 8.1 extracted |
Win98 extracted |
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This file was processed as: MacBinary (archive/macBinary).

You can browse this item here: develop 17
Confidence	Program	Detection	Match Type	Support
`10%`	dexvert	MacBinary `(archive/macBinary)`	fallback	Supported
`100%`	file	MacBinary II, inited, Mon Apr 18 13:52:05 1994, modified Tue Oct 25 04:35:35 1994, creator 'HLX2', type 'ONLN', 4382880 bytes "develop 17" , at 0x42e120 44301 bytes resource	default (weak)
`99%`	file	data	default
`100%`	TrID	MacBinary 2	default (weak)
`100%`	siegfried	fmt/1762 MacBinary (II)	default
`100%`	lsar	MacBinary	default
id metadata
key	value
macFileType	`[ONLN]`
macFileCreator	`[HLX2]`
hex view
+--------+-------------------------+-------------------------+--------+--------+
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|00005430| 09 66 69 67 75 72 69 6e | 67 20 6f 75 74 20 77 68 |.figurin|g out wh|
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|000054a0| d5 73 20 61 20 77 69 6e | 6e 69 6e 67 20 6f 72 20 |.s a win|ning or |
|000054b0| 74 79 69 6e 67 20 6d 6f | 76 65 0d a5 09 75 6e 63 |tying mo|ve...unc|
|000054c0| 6f 76 65 72 69 6e 67 20 | 61 20 67 6f 6f 64 20 6d |overing |a good m|
|000054d0| 6f 76 65 20 77 68 65 6e | 20 69 74 d5 73 20 54 61 |ove when| it.s Ta|
|000054e0| 70 42 6f 61 72 64 d5 73 | 20 74 75 72 6e 0d a5 09 |pBoard.s| turn...|
|000054f0| 73 61 76 69 6e 67 20 74 | 68 65 20 73 74 61 74 65 |saving t|he state|
|00005500| 20 6f 66 20 74 68 65 20 | 62 6f 61 72 64 20 77 68 | of the |board wh|
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|00005590| 6f 74 6f 74 79 70 65 20 | 74 68 61 74 20 65 61 63 |ototype |that eac|
|000055a0| 68 20 73 70 65 63 69 66 | 69 63 20 67 61 6d 65 20 |h specif|ic game |
|000055b0| 63 61 6e 20 74 68 65 6e | 20 69 6e 68 65 72 69 74 |can then| inherit|
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|000055f0| 6f 74 6f 42 6f 61 72 64 | 20 50 72 6f 74 6f 20 54 |otoBoard| Proto T|
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|00005620| 72 65 20 64 69 66 66 65 | 72 65 6e 74 2c 20 65 61 |re diffe|rent, ea|
|00005630| 63 68 20 61 6c 73 6f 20 | 68 61 73 20 69 74 73 20 |ch also |has its |
|00005640| 6f 77 6e 20 72 75 6c 65 | 73 20 61 6e 64 20 70 6f |own rule|s and po|
|00005650| 73 73 69 62 6c 79 20 69 | 74 73 20 6f 77 6e 20 62 |ssibly i|ts own b|
|00005660| 6f 61 72 64 2c 20 61 6e | 64 20 65 61 63 68 20 72 |oard, an|d each r|
|00005670| 65 71 75 69 72 65 73 20 | 69 74 73 20 6f 77 6e 20 |equires |its own |
|00005680| 61 6c 67 6f 72 69 74 68 | 6d 20 66 6f 72 20 66 69 |algorith|m for fi|
|00005690| 6e 64 69 6e 67 20 67 6f | 6f 64 20 6d 6f 76 65 73 |nding go|od moves|
|000056a0| 20 66 6f 72 20 74 68 65 | 20 63 6f 6d 70 75 74 65 | for the| compute|
|000056b0| 72 3b 20 64 65 74 61 69 | 6c 73 20 66 6f 6c 6c 6f |r; detai|ls follo|
|000056c0| 77 2e 0d 54 49 43 2d 54 | 41 43 2d 54 4f 45 0d 59 |w..TIC-T|AC-TOE.Y|
|000056d0| 6f 75 20 75 6e 64 6f 75 | 62 74 65 64 6c 79 20 6b |ou undou|btedly k|
|000056e0| 6e 6f 77 20 74 68 69 73 | 20 67 61 6d 65 2c 20 62 |now this| game, b|
|000056f0| 75 74 20 77 65 d5 6c 6c | 20 64 65 73 63 72 69 62 |ut we.ll| describ|
|00005700| 65 20 69 74 20 62 72 69 | 65 66 6c 79 3a 20 54 69 |e it bri|efly: Ti|
|00005710| 63 2d 74 61 63 2d 74 6f | 65 20 69 73 20 70 6c 61 |c-tac-to|e is pla|
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|00005730| 6f 61 72 64 20 77 69 74 | 68 20 70 6c 61 79 65 72 |oard wit|h player|
|00005740| 73 20 74 61 6b 69 6e 67 | 20 74 75 72 6e 73 20 6d |s taking| turns m|
|00005750| 61 6b 69 6e 67 20 58 d5 | 73 20 61 6e 64 20 4f d5 |aking X.|s and O.|
|00005760| 73 2e 20 54 68 65 20 66 | 69 72 73 74 20 70 6c 61 |s. The f|irst pla|
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|00005780| 20 69 6e 20 61 20 72 6f | 77 20 68 6f 72 69 7a 6f | in a ro|w horizo|
|00005790| 6e 74 61 6c 6c 79 2c 20 | 76 65 72 74 69 63 61 6c |ntally, |vertical|
|000057a0| 6c 79 2c 20 6f 72 20 64 | 69 61 67 6f 6e 61 6c 6c |ly, or d|iagonall|
|000057b0| 79 20 77 69 6e 73 2e 20 | 49 66 20 6e 65 69 74 68 |y wins. |If neith|
|000057c0| 65 72 20 70 6c 61 79 65 | 72 20 67 65 74 73 20 74 |er playe|r gets t|
|000057d0| 68 72 65 65 20 69 6e 20 | 61 20 72 6f 77 2c 20 74 |hree in |a row, t|
|000057e0| 68 65 20 67 61 6d 65 20 | 69 73 20 74 69 65 64 2e |he game |is tied.|
|000057f0| 20 46 69 67 75 72 65 20 | 31 20 73 68 6f 77 73 20 | Figure |1 shows |
|00005800| 61 20 74 79 70 69 63 61 | 6c 20 67 61 6d 65 20 6f |a typica|l game o|
|00005810| 66 20 54 69 63 2d 74 61 | 63 2d 74 6f 65 2e 20 58 |f Tic-ta|c-toe. X|
|00005820| 20 67 65 74 73 20 74 68 | 72 65 65 20 6f 6e 20 74 | gets th|ree on t|
|00005830| 68 65 20 64 69 61 67 6f | 6e 61 6c 20 61 6e 64 20 |he diago|nal and |
|00005840| 77 69 6e 73 2e 0d 54 69 | 63 2d 74 61 63 2d 74 6f |wins..Ti|c-tac-to|
|00005850| 65 20 69 73 20 61 20 73 | 69 6d 70 6c 65 20 67 61 |e is a s|imple ga|
|00005860| 6d 65 20 74 6f 20 6d 61 | 73 74 65 72 2e 20 54 68 |me to ma|ster. Th|
|00005870| 65 72 65 20 61 72 65 20 | 61 20 66 65 77 20 65 61 |ere are |a few ea|
|00005880| 73 79 20 68 65 75 72 69 | 73 74 69 63 73 2c 20 73 |sy heuri|stics, s|
|00005890| 75 63 68 20 61 73 20 61 | 6c 77 61 79 73 20 74 61 |uch as a|lways ta|
|000058a0| 6b 65 20 74 68 65 20 63 | 65 6e 74 65 72 20 73 71 |ke the c|enter sq|
|000058b0| 75 61 72 65 20 69 66 20 | 79 6f 75 20 63 61 6e 2c |uare if |you can,|
|000058c0| 20 61 6e 64 20 77 69 74 | 68 20 61 20 6c 69 74 74 | and wit|h a litt|
|000058d0| 6c 65 20 74 68 6f 75 67 | 68 74 20 69 74 d5 73 20 |le thoug|ht it.s |
|000058e0| 6e 6f 74 20 68 61 72 64 | 20 74 6f 20 73 65 65 20 |not hard| to see |
|000058f0| 73 65 76 65 72 61 6c 20 | 6d 6f 76 65 73 20 61 68 |several |moves ah|
|00005900| 65 61 64 2e 0d 46 69 67 | 75 72 65 20 31 0d 54 69 |ead..Fig|ure 1.Ti|
|00005910| 63 2d 74 61 63 2d 74 6f | 65 0d 54 61 70 42 6f 61 |c-tac-to|e.TapBoa|
|00005920| 72 64 d5 73 20 61 6c 67 | 6f 72 69 74 68 6d 20 66 |rd.s alg|orithm f|
|00005930| 6f 72 20 64 65 74 65 72 | 6d 69 6e 69 6e 67 20 61 |or deter|mining a|
|00005940| 20 67 6f 6f 64 20 54 69 | 63 2d 74 61 63 2d 74 6f | good Ti|c-tac-to|
|00005950| 65 20 6d 6f 76 65 20 69 | 6e 76 6f 6c 76 65 73 20 |e move i|nvolves |
|00005960| 64 6f 69 6e 67 20 61 20 | 74 77 6f 2d 6d 6f 76 65 |doing a |two-move|
|00005970| 20 6c 6f 6f 6b 2d 61 68 | 65 61 64 2c 20 63 6f 6d | look-ah|ead, com|
|00005980| 62 69 6e 65 64 20 77 69 | 74 68 20 73 6f 6d 65 20 |bined wi|th some |
|00005990| 73 69 6d 70 6c 65 20 68 | 65 75 72 69 73 74 69 63 |simple h|euristic|
|000059a0| 73 2e 20 54 68 65 20 6c | 6f 6f 6b 2d 61 68 65 61 |s. The l|ook-ahea|
|000059b0| 64 20 74 72 69 65 73 20 | 61 6c 6c 20 70 6f 73 73 |d tries |all poss|
|000059c0| 69 62 6c 65 20 6d 6f 76 | 65 73 2c 20 74 68 65 6e |ible mov|es, then|
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|000059e0| 62 6c 65 20 61 6e 73 77 | 65 72 69 6e 67 20 6d 6f |ble answ|ering mo|
|000059f0| 76 65 73 2e 20 54 68 65 | 20 68 65 75 72 69 73 74 |ves. The| heurist|
|00005a00| 69 63 20 67 69 76 65 73 | 20 67 72 65 61 74 65 72 |ic gives| greater|
|00005a10| 20 77 65 69 67 68 74 20 | 74 6f 20 74 61 6b 69 6e | weight |to takin|
|00005a20| 67 20 74 68 65 20 63 65 | 6e 74 65 72 20 61 6e 64 |g the ce|nter and|
|00005a30| 20 63 6f 72 6e 65 72 20 | 73 71 75 61 72 65 73 2e | corner |squares.|
|00005a40| 20 54 68 69 73 20 61 6c | 67 6f 72 69 74 68 6d 20 | This al|gorithm |
|00005a50| 64 6f 65 73 6e d5 74 20 | 70 6c 61 79 20 61 20 70 |doesn.t |play a p|
|00005a60| 65 72 66 65 63 74 20 67 | 61 6d 65 20 6f 66 20 54 |erfect g|ame of T|
|00005a70| 69 63 2d 74 61 63 2d 74 | 6f 65 2c 20 62 75 74 20 |ic-tac-t|oe, but |
|00005a80| 74 68 69 73 20 69 73 20 | 61 63 74 75 61 6c 6c 79 |this is |actually|
|00005a90| 20 61 6e 20 61 64 76 61 | 6e 74 61 67 65 2c 20 66 | an adva|ntage, f|
|00005aa0| 6f 72 20 74 77 6f 20 72 | 65 61 73 6f 6e 73 3a 20 |or two r|easons: |
|00005ab0| 69 74 20 70 75 6c 6c 73 | 20 70 6c 61 79 65 72 73 |it pulls| players|
|00005ac0| 20 69 6e 74 6f 20 74 68 | 65 20 67 61 6d 65 20 62 | into th|e game b|
|00005ad0| 79 20 67 69 76 69 6e 67 | 20 74 68 65 20 69 6d 70 |y giving| the imp|
|00005ae0| 72 65 73 73 69 6f 6e 20 | 74 68 61 74 20 74 68 65 |ression |that the|
|00005af0| 20 63 6f 6d 70 75 74 65 | 72 20 69 73 20 61 6e 20 | compute|r is an |
|00005b00| 65 61 73 79 20 74 61 72 | 67 65 74 2c 20 61 6e 64 |easy tar|get, and|
|00005b10| 20 69 74 20 70 72 6f 76 | 69 64 65 73 20 61 20 67 | it prov|ides a g|
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|00005b40| 73 65 72 73 20 28 6d 79 | 20 66 69 76 65 2d 79 65 |sers (my| five-ye|
|00005b50| 61 72 2d 6f 6c 64 20 64 | 61 75 67 68 74 65 72 20 |ar-old d|aughter |
|00005b60| 6c 6f 76 65 73 20 69 74 | 29 2e 20 0d 47 4f 4d 4f |loves it|). .GOMO|
|00005b70| 4b 55 0d 47 6f 6d 6f 6b | 75 20 69 73 20 70 6c 61 |KU.Gomok|u is pla|
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|00005ba0| 61 6b 65 20 74 75 72 6e | 73 20 70 6c 61 63 69 6e |ake turn|s placin|
|00005bb0| 67 20 70 69 65 63 65 73 | 20 6f 6e 20 74 68 65 20 |g pieces| on the |
|00005bc0| 62 6f 61 72 64 2c 20 61 | 6e 64 20 74 68 65 20 66 |board, a|nd the f|
|00005bd0| 69 72 73 74 20 70 6c 61 | 79 65 72 20 74 6f 20 67 |irst pla|yer to g|
|00005be0| 65 74 20 66 69 76 65 20 | 69 6e 20 61 20 72 6f 77 |et five |in a row|
|00005bf0| 20 68 6f 72 69 7a 6f 6e | 74 61 6c 6c 79 2c 20 76 | horizon|tally, v|
|00005c00| 65 72 74 69 63 61 6c 6c | 79 2c 20 6f 72 20 64 69 |erticall|y, or di|
|00005c10| 61 67 6f 6e 61 6c 6c 79 | 20 77 69 6e 73 2e 20 46 |agonally| wins. F|
|00005c20| 69 67 75 72 65 20 32 20 | 73 68 6f 77 73 20 61 20 |igure 2 |shows a |
|00005c30| 73 68 6f 72 74 20 67 61 | 6d 65 20 6f 66 20 47 6f |short ga|me of Go|
|00005c40| 6d 6f 6b 75 20 77 6f 6e | 20 62 79 20 77 68 69 74 |moku won| by whit|
|00005c50| 65 20 28 61 20 72 65 61 | 6c 20 67 61 6d 65 20 77 |e (a rea|l game w|
|00005c60| 6f 75 6c 64 20 6f 66 20 | 63 6f 75 72 73 65 20 62 |ould of |course b|
|00005c70| 65 20 70 6c 61 79 65 64 | 20 6d 6f 72 65 20 64 65 |e played| more de|
|00005c80| 66 65 6e 73 69 76 65 6c | 79 20 74 68 61 6e 20 74 |fensivel|y than t|
|00005c90| 68 69 73 20 6f 6e 65 2c | 20 77 68 69 63 68 20 69 |his one,| which i|
|00005ca0| 73 20 66 6f 72 20 64 65 | 6d 6f 6e 73 74 72 61 74 |s for de|monstrat|
|00005cb0| 69 6f 6e 20 70 75 72 70 | 6f 73 65 73 20 6f 6e 6c |ion purp|oses onl|
|00005cc0| 79 29 2e 0d 46 69 67 75 | 72 65 20 32 0d 47 6f 6d |y)..Figu|re 2.Gom|
|00005cd0| 6f 6b 75 0d 47 6f 6d 6f | 6b 75 20 69 73 20 6d 6f |oku.Gomo|ku is mo|
|00005ce0| 72 65 20 63 68 61 6c 6c | 65 6e 67 69 6e 67 20 74 |re chall|enging t|
|00005cf0| 68 61 6e 20 54 69 63 2d | 74 61 63 2d 74 6f 65 2e |han Tic-|tac-toe.|
|00005d00| 20 54 68 65 20 6c 61 72 | 67 65 72 20 67 61 6d 65 | The lar|ger game|
|00005d10| 20 62 6f 61 72 64 20 61 | 6e 64 20 6c 6f 6e 67 65 | board a|nd longe|
|00005d20| 72 20 77 69 6e 6e 69 6e | 67 20 73 65 71 75 65 6e |r winnin|g sequen|
|00005d30| 63 65 20 6d 61 6b 65 20 | 66 6f 72 20 6d 61 6e 79 |ce make |for many|
|00005d40| 20 6d 6f 72 65 20 63 6f | 6d 62 69 6e 61 74 69 6f | more co|mbinatio|
|00005d50| 6e 73 2c 20 61 6e 64 20 | 74 68 65 20 67 61 6d 65 |ns, and |the game|
|00005d60| 20 76 69 72 74 75 61 6c | 6c 79 20 72 65 71 75 69 | virtual|ly requi|
|00005d70| 72 65 73 20 74 68 61 74 | 20 74 68 65 20 77 69 6e |res that| the win|
|00005d80| 6e 65 72 20 d2 73 6e 65 | 61 6b 20 75 70 d3 20 6f |ner .sne|ak up. o|
|00005d90| 6e 20 74 68 65 20 6c 6f | 73 65 72 2c 20 72 61 74 |n the lo|ser, rat|
|00005da0| 68 65 72 20 74 68 61 6e | 20 6a 75 73 74 20 67 6f |her than| just go|
|00005db0| 69 6e 67 20 66 6f 72 20 | 61 20 73 69 6d 70 6c 65 |ing for |a simple|
|00005dc0| 20 73 65 71 75 65 6e 63 | 65 20 6f 66 20 66 69 76 | sequenc|e of fiv|
|00005dd0| 65 20 70 69 65 63 65 73 | 2c 20 77 68 69 63 68 20 |e pieces|, which |
|00005de0| 74 68 65 20 6f 70 70 6f | 6e 65 6e 74 20 63 61 6e |the oppo|nent can|
|00005df0| 20 65 61 73 69 6c 79 20 | 64 65 74 65 63 74 20 61 | easily |detect a|
|00005e00| 6e 64 20 70 72 65 76 65 | 6e 74 2e 0d 54 61 70 42 |nd preve|nt..TapB|
|00005e10| 6f 61 72 64 d5 73 20 61 | 70 70 72 6f 61 63 68 20 |oard.s a|pproach |
|00005e20| 74 6f 20 66 69 6e 64 69 | 6e 67 20 61 20 67 6f 6f |to findi|ng a goo|
|00005e30| 64 20 47 6f 6d 6f 6b 75 | 20 6d 6f 76 65 20 69 6e |d Gomoku| move in|
|00005e40| 76 6f 6c 76 65 73 20 6d | 61 6b 69 6e 67 20 74 68 |volves m|aking th|
|00005e50| 72 65 65 20 70 61 73 73 | 65 73 20 6f 76 65 72 20 |ree pass|es over |
|00005e60| 74 68 65 20 62 6f 61 72 | 64 3a 20 74 68 65 20 66 |the boar|d: the f|
|00005e70| 69 72 73 74 20 6c 6f 6f | 6b 73 20 66 6f 72 20 77 |irst loo|ks for w|
|00005e80| 69 6e 6e 69 6e 67 20 6d | 6f 76 65 73 3b 20 74 68 |inning m|oves; th|
|00005e90| 65 20 73 65 63 6f 6e 64 | 20 6c 6f 6f 6b 73 20 66 |e second| looks f|
|00005ea0| 6f 72 20 73 69 74 75 61 | 74 69 6f 6e 73 20 77 68 |or situa|tions wh|
|00005eb0| 65 72 65 20 74 68 65 20 | 75 73 65 72 20 68 61 73 |ere the |user has|
|00005ec0| 20 74 68 72 65 65 20 6f | 72 20 6d 6f 72 65 20 69 | three o|r more i|
|00005ed0| 6e 20 61 20 72 6f 77 20 | 61 6e 64 20 74 72 69 65 |n a row |and trie|
|00005ee0| 73 20 74 6f 20 62 6c 6f | 63 6b 20 74 68 6f 73 65 |s to blo|ck those|
|00005ef0| 3b 20 74 68 65 20 74 68 | 69 72 64 20 6c 6f 6f 6b |; the th|ird look|
|00005f00| 73 20 66 6f 72 20 0d 73 | 69 74 75 61 74 69 6f 6e |s for .s|ituation|
|00005f10| 73 20 77 68 65 72 65 20 | 54 61 70 42 6f 61 72 64 |s where |TapBoard|
|00005f20| 20 68 61 73 20 74 68 72 | 65 65 20 6f 72 20 6d 6f | has thr|ee or mo|
|00005f30| 72 65 20 69 6e 20 61 20 | 72 6f 77 20 61 6e 64 20 |re in a |row and |
|00005f40| 74 72 69 65 73 20 74 6f | 20 61 64 64 20 74 6f 20 |tries to| add to |
|00005f50| 74 68 6f 73 65 2e 20 54 | 68 69 73 20 61 6c 67 6f |those. T|his algo|
|00005f60| 72 69 74 68 6d 20 70 6c | 61 79 73 20 61 20 64 65 |rithm pl|ays a de|
|00005f70| 66 65 6e 73 69 76 65 20 | 67 61 6d 65 20 74 68 61 |fensive |game tha|
|00005f80| 74 d5 73 20 68 61 72 64 | 20 74 6f 20 62 65 61 74 |t.s hard| to beat|
|00005f90| 2e 20 0d 52 45 56 45 52 | 53 49 0d 52 65 76 65 72 |. .REVER|SI.Rever|
|00005fa0| 73 69 20 69 73 20 61 6c | 73 6f 20 70 6c 61 79 65 |si is al|so playe|
|00005fb0| 64 20 6f 6e 20 61 6e 20 | 38 20 78 20 38 20 62 6f |d on an |8 x 8 bo|
|00005fc0| 61 72 64 2e 20 46 6f 75 | 72 20 70 69 65 63 65 73 |ard. Fou|r pieces|
|00005fd0| 20 61 72 65 20 70 6c 61 | 63 65 64 20 69 6e 20 74 | are pla|ced in t|
|00005fe0| 68 65 20 63 65 6e 74 65 | 72 20 6f 66 20 74 68 65 |he cente|r of the|
|00005ff0| 20 62 6f 61 72 64 20 61 | 73 20 73 68 6f 77 6e 20 | board a|s shown |
|00006000| 69 6e 20 46 69 67 75 72 | 65 20 33 41 2c 20 61 6e |in Figur|e 3A, an|
|00006010| 64 20 74 68 65 20 70 6c | 61 79 65 72 73 20 74 61 |d the pl|ayers ta|
|00006020| 6b 65 20 74 75 72 6e 73 | 20 70 6c 61 63 69 6e 67 |ke turns| placing|
|00006030| 20 70 69 65 63 65 73 2c | 20 74 72 79 69 6e 67 20 | pieces,| trying |
|00006040| 74 6f 20 74 72 61 70 20 | 74 68 65 20 6f 70 70 6f |to trap |the oppo|
|00006050| 6e 65 6e 74 d5 73 20 70 | 69 65 63 65 73 20 62 65 |nent.s p|ieces be|
|00006060| 74 77 65 65 6e 20 74 68 | 65 20 6e 65 77 20 70 69 |tween th|e new pi|
|00006070| 65 63 65 20 61 6e 64 20 | 61 6e 20 65 78 69 73 74 |ece and |an exist|
|00006080| 69 6e 67 20 6f 6e 65 20 | 68 6f 72 69 7a 6f 6e 74 |ing one |horizont|
|00006090| 61 6c 6c 79 2c 20 76 65 | 72 74 69 63 61 6c 6c 79 |ally, ve|rtically|
|000060a0| 2c 20 6f 72 20 64 69 61 | 67 6f 6e 61 6c 6c 79 2e |, or dia|gonally.|
|000060b0| 20 46 69 67 75 72 65 20 | 33 42 20 73 68 6f 77 73 | Figure |3B shows|
|000060c0| 20 6f 6e 65 20 6f 66 20 | 74 68 65 20 73 71 75 61 | one of |the squa|
|000060d0| 72 65 73 20 74 68 61 74 | 20 77 6f 75 6c 64 20 62 |res that| would b|
|000060e0| 65 20 61 20 6c 65 67 61 | 6c 20 66 69 72 73 74 20 |e a lega|l first |
|000060f0| 6d 6f 76 65 20 66 6f 72 | 20 77 68 69 74 65 2e 20 |move for| white. |
|00006100| 54 68 65 20 70 69 65 63 | 65 73 20 74 68 61 74 20 |The piec|es that |
|00006110| 61 72 65 20 d2 74 72 61 | 70 70 65 64 d3 20 63 68 |are .tra|pped. ch|
|00006120| 61 6e 67 65 20 63 6f 6c | 6f 72 2c 20 6f 72 20 72 |ange col|or, or r|
|00006130| 65 76 65 72 73 65 20 d1 | 20 68 65 6e 63 65 20 74 |everse .| hence t|
|00006140| 68 65 20 6e 61 6d 65 20 | 6f 66 20 74 68 65 20 67 |he name |of the g|
|00006150| 61 6d 65 2e 20 46 69 67 | 75 72 65 20 33 43 20 73 |ame. Fig|ure 3C s|
|00006160| 68 6f 77 73 20 74 68 65 | 20 72 65 73 75 6c 74 20 |hows the| result |
|00006170| 6f 66 20 74 68 65 20 6d | 6f 76 65 20 69 6e 20 33 |of the m|ove in 3|
|00006180| 42 2e 0d 46 69 67 75 72 | 65 20 33 0d 52 65 76 65 |B..Figur|e 3.Reve|
|00006190| 72 73 69 0d 50 6c 61 79 | 20 63 6f 6e 74 69 6e 75 |rsi.Play| continu|
|000061a0| 65 73 20 75 6e 74 69 6c | 20 6e 6f 20 6c 65 67 61 |es until| no lega|
|000061b0| 6c 20 6d 6f 76 65 73 20 | 61 72 65 20 6c 65 66 74 |l moves |are left|
|000061c0| 2e 20 54 68 65 20 70 6c | 61 79 65 72 20 77 69 74 |. The pl|ayer wit|
|000061d0| 68 20 74 68 65 20 6d 6f | 73 74 20 70 69 65 63 65 |h the mo|st piece|
|000061e0| 73 20 77 69 6e 73 2e 20 | 49 66 20 62 6f 74 68 20 |s wins. |If both |
|000061f0| 70 6c 61 79 65 72 73 20 | 68 61 76 65 20 74 68 65 |players |have the|
|00006200| 20 73 61 6d 65 20 6e 75 | 6d 62 65 72 20 6f 66 20 | same nu|mber of |
|00006210| 70 69 65 63 65 73 2c 20 | 69 74 d5 73 20 61 20 74 |pieces, |it.s a t|
|00006220| 69 65 2e 20 42 65 63 61 | 75 73 65 20 6f 66 20 74 |ie. Beca|use of t|
|00006230| 68 65 20 72 65 76 65 72 | 73 69 6e 67 20 70 69 65 |he rever|sing pie|
|00006240| 63 65 73 2c 20 74 68 65 | 20 73 69 74 75 61 74 69 |ces, the| situati|
|00006250| 6f 6e 20 63 61 6e 20 63 | 68 61 6e 67 65 20 73 75 |on can c|hange su|
|00006260| 64 64 65 6e 6c 79 20 61 | 6e 64 20 64 72 61 6d 61 |ddenly a|nd drama|
|00006270| 74 69 63 61 6c 6c 79 2e | 20 4f 66 74 65 6e 20 6f |tically.| Often o|
|00006280| 6e 65 20 70 6c 61 79 65 | 72 20 6c 6f 6f 6b 73 20 |ne playe|r looks |
|00006290| 6c 69 6b 65 20 74 68 65 | 20 63 6c 65 61 72 20 77 |like the| clear w|
|000062a0| 69 6e 6e 65 72 20 75 6e | 74 69 6c 20 6e 65 61 72 |inner un|til near|
|000062b0| 20 74 68 65 20 65 6e 64 | 20 6f 66 20 74 68 65 20 | the end| of the |
|000062c0| 67 61 6d 65 2c 20 77 68 | 65 6e 20 74 68 65 20 6f |game, wh|en the o|
|000062d0| 74 68 65 72 20 70 6c 61 | 79 65 72 20 73 75 64 64 |ther pla|yer sudd|
|000062e0| 65 6e 6c 79 20 73 75 72 | 67 65 73 20 61 68 65 61 |enly sur|ges ahea|
|000062f0| 64 20 61 6e 64 20 77 69 | 6e 73 2e 0d 54 61 70 42 |d and wi|ns..TapB|
|00006300| 6f 61 72 64 20 6c 6f 6f | 6b 73 20 66 6f 72 20 61 |oard loo|ks for a|
|00006310| 20 67 6f 6f 64 20 6d 6f | 76 65 20 69 6e 20 52 65 | good mo|ve in Re|
|00006320| 76 65 72 73 69 20 62 79 | 20 63 68 65 63 6b 69 6e |versi by| checkin|
|00006330| 67 20 65 76 65 72 79 20 | 70 6f 73 73 69 62 6c 65 |g every |possible|
|00006340| 20 6d 6f 76 65 2c 20 63 | 6f 75 6e 74 69 6e 67 20 | move, c|ounting |
|00006350| 74 68 65 20 6e 75 6d 62 | 65 72 20 6f 66 20 75 73 |the numb|er of us|
|00006360| 65 72 20 70 69 65 63 65 | 73 20 74 68 61 74 20 77 |er piece|s that w|
|00006370| 69 6c 6c 20 62 65 20 63 | 6f 6e 76 65 72 74 65 64 |ill be c|onverted|
|00006380| 2c 20 61 6e 64 20 74 68 | 65 6e 20 6d 6f 64 69 66 |, and th|en modif|
|00006390| 79 69 6e 67 20 74 68 65 | 20 63 6f 75 6e 74 73 20 |ying the| counts |
|000063a0| 62 61 73 65 64 20 6f 6e | 20 68 65 75 72 69 73 74 |based on| heurist|
|000063b0| 69 63 73 20 63 6f 6e 63 | 65 72 6e 69 6e 67 20 70 |ics conc|erning p|
|000063c0| 6c 61 79 73 20 61 6c 6f | 6e 67 20 74 68 65 20 65 |lays alo|ng the e|
|000063d0| 64 67 65 73 20 6f 66 20 | 74 68 65 20 62 6f 61 72 |dges of |the boar|
|000063e0| 64 2e 20 54 68 69 73 20 | 61 6c 67 6f 72 69 74 68 |d. This |algorith|
|000063f0| 6d 20 70 6c 61 79 73 20 | 74 68 65 20 67 61 6d 65 |m plays |the game|
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