4-4 Point 3-3 Invasion, Extend, One-Space Jump
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If White jumps at , Black has two choices. If Black pushes here, white will most likely fill his gap. After , Black a is a logical move, but Black will more likely choose to take sente.
If White extends at instead, Black will immediately use his aji at to restrict White with and , after which White concludes with to avoid being hemmed in.
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