实战可能更复杂一些，白棋可以先不进角。也就是说黑g2首先做出了转换的姿态，但是否转换，对局的另一方要根据全局的子力配置(主要是其它边和稳定子的情况)来考虑转换是否对自己有利。如果白方不愿意转换，那么黑棋下了X-格后，成功获得了一步余裕手。
换角战术并不是总能成功的，而且对转换的评价非常复杂，由于篇幅所限，不再深入讨论。下面只举3个简单例子：
图34：黑先
在图34中，白棋在北边和西边有两条非平衡边，但它们都是安全的。如果黑下b2，白可以先下b1，然后再下a1，黑棋没有楔入的机会。如果黑下b7，白棋进角a8，但黑棋却无法在a7进行楔入，下一步白棋自己可以把a7填上。
图35的情况比较微妙，如果黑棋在b7发起对西边的攻击会怎么样呢？白下a7！由于f3-b7对角线上没有黑棋，黑棋不能进角a8，下一步，由于白棋在d8有楔入的子，可以下a8进角，这个例子里，黑棋的攻击失败。
图35：黑先
由于白棋控制了对角线，通常的次序在这里不起作用了，我们把这种情形称为欺骗(swindle)。这种情形经常会发生，所以你发起攻击前，尤其要小心，你必须仔细检查对方是否有办法破坏你的换角战术。
四通陷阱(STONER TRAPS)
对非平衡边的攻击，并不总是引起换角，被攻击方有选择的权利。下面我们看一个强制转换的例子，这个例子和非平衡边一样，一方先发起攻击，但是跟非平衡边不一样的时，被攻击方除了让对方进角外，别无它法。
四通陷阱的形成分两个步骤，首先，攻击方下X-格后获得对角线的控制，然后攻击不平衡边，准备进角。这时，被攻击方一旦吃回，就会同时吃掉前面一步所下的X格，图36给出了一个例子。
图36：白先
这里，黑棋南边有弱点，白下b7取得e4-b7对角线的控制(见图37)，黑棋不能马上进a8角，黑棋会尽量抢占对角线上点以进角，应f3为正常次序。但在这时，白下d8(见图38)，黑棋已经没有办法来阻止白棋下h8进角了。
图37：B7后
如果黑应b8，那么黑棋会吃掉b7，从而把a8和h8拱手相让。如果黑下a8，白棋可以马上下h8，或者在b8楔入而保留以后下h8的权利。如果黑方不应，白棋仍然可以下h8进角(这就是四通陷阱和一般非平衡边的不同之处)。
图38：B7-F3-D8后
和非平衡边攻击一样，四通陷阱也有时不起作用，发起攻击前要小心，图39是这样的一个例子。
白下b7发起攻击，黑应c3，下一步白棋没法在c8下子，等黑下了a8后，南边留下了一个白棋无法楔入的偶数空。
图39：白先
结语
通过上述黑白棋战术的简单描述，希望能对您理解黑白棋的复杂性有所帮助。黑白棋的规则虽然很简单，但它的变化却非常复杂，不愧是经典的益智游戏。这里小小的篇幅不能无法涵盖黑白棋在法国和世界上几十年的发展，我们只是希望通过这个入门教材，能帮你更好地享受黑白棋的乐趣。如果你希望得到更多的内容，欢迎访问法国黑白棋协会,这里有论坛、有关书籍、俱乐部、比赛......
译者注:当然也欢迎您访问中国黑白棋联盟
[URL=http://www.othello-china.com/]http://www.othello-china.com[/URL]
术语(GLOSSARY)
C-格和X-格(C-squares and X-squares): C-squares are the squares at a2, a7, b1, b8, g1, g8, h2, and h7. X-squares are the squares at b2, b7, g2, and g7. These squares should only be occupied with care.
中间(Center) : The center of a position is the set of interior discs.
控中战术(Control of the center) : Strategy which consists of trying to have as many of your discs as possible in the center of the position and as few as possible along the frontier for the maximum possible mobility.
角(Corner) : The corners are the squares at a1, a8, h1, and h8. They are often very good squares to occupy.
爬边(Edge creeping) : Strategy which consists of gaining the maximum number of moves on one or two edges at the expense of edge weaknesses (unbalanced edges, ...). The creeper tries to very quickly run his adversary out of moves by leaving him the entire frontier but if it doesn't work, the influence from his bad edges will rapidly weaken his position.
墙或前线(Frontier) : The set of external discs, that is to say discs which are adjacent to an empty square.
余裕手(Gain a tempo) : Playing one more move than your opponent in a region of the Othello board and forcing him to initiate play elsewhere (thus lengthening his frontier).
影响(Influence) : One says that a players discs exercise influence when they force him to flip discs in several directions at the same time.
内子/外子(Internal/external discs) : An internal disc is a disc which isn't adjacent to an empty square. It is strategically bad to have no interior discs.
自由度(Liberty) : Non-catastrophic moves. "To be short of liberties" : to have to give up a corner in the near future.
大食策略(Maximum disc strategy) : Incorrect strategy, applied by many beginners, which consists of trying to flip the maximum number of discs on each move.
行动力(Mobility) : Number of possible moves available to a player. By extension, a player has good mobility when he has a large number of possible moves.
奇偶性(Parity) : Strategy which consists of leaving an even number of empty squares in each region to which your opponent has access.
安全子(Quiet move) : A move which flips no frontier discs. Often excellent.
稳定子(Stable discs) : Discs which can never be flipped. A corner is an example of a stable disc.
四通陷阱(Stoner Trap) : Attack of a weak edge position which leads to a forced exchange of corners.
非平衡边(Unbalanced edge) : Edge formation consisting of 5 discs of the same colour, adjacent to each-other, none of which is a corner disc.
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更多资料请访问 中国黑白棋联盟 http://www.othello-china.com
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大家讨论一下 黑白棋 的策略 问题吧
