2 coinflip hands. 180 person SNG

[tshak]

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I felt the second hand was marginal also. But I still called. Why call with TT and fold 99? Is the decision really that close?

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It depends on the range you put your opponent on. For example, if we're pretty confident that Villians range is "JJ-88,AQs+,AQo+", 99 is about 49.2%. Definitely a close decision given the money already in the pot, but risky if our range is too loose. Compare this with TT at 57.6%. 99 is almost break even here, whereas TT has a ~15% edge. With TT there's a lot more room for error in our range and it has significantly more equity than 99.