Tökömtele: In a white to kill scenario, I think after WQ4; BQ3; WR4; black's strongest response is not S4 but T3. White then is forced to S4, black T4; white is forced to R4; and with black T1 black has the 2 eyes. I am basically saying W2 R4 is a mistake.
Yes indeed. S4 was a mistake.