D04 - 科勒系统 (基础)
Variation: 科勒系统 (基础)
Initial Move: 科勒体系。白方构建了一个稳固的兵三角(c3-d4-e3)。这是一个慢热型的开局,为e4的强力中心突破做好了准备。 Learn this opening step by step
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