Trick Joseki? Shoulder hit after keima to 3-4-stone
Black's pincer is too close to White's stone (it should be at least one space lower). (This variation is not in the joseki books because it is not joseki.) That means that White can "lean on it while indirectly attacking Black's corner stone.

White should play Q15,Black plays p15, White cuts with P14, threatening to make a ladder to capture stone 3, Black extends from this stone, White ataris with P16, and quashes the corner stone with P17.

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