Post B4NMznJ6uxBhotoGvI by tnt@chaos.social
 (DIR) More posts by tnt@chaos.social
 (DIR) Post #B4NCkXiTbR0Ra2lOJU by azonenberg@ioc.exchange
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       ReworkCTF challenge 13 (400 points) and 14 (500 points) are both missing dogbone traces under a BGA.The difference is, 13 was "discovered" before populating the board so you have easier access.For 14, you have to start with a fully populated board and either pull the BGA or go in from the back side.
       
 (DIR) Post #B4NMznJ6uxBhotoGvI by tnt@chaos.social
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       @azonenberg The fact challenge 13 is pin T14 and challenge 14 is pin R13 bothers me a bit 😅
       
 (DIR) Post #B4NhOgouAjC81UpVp2 by AMS@infosec.exchange
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       @azonenberg How big is the BGA? Because I've done the "snake a tinned magnet wire in with flux on and reflow" before on a 1mm pitch. Especially challenge 13 where I just need to bridge two adjacent balls.
       
 (DIR) Post #B4Nhb7bQQ9WiYxS8Lw by azonenberg@ioc.exchange
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       @AMS 0.8mm pitch with 0.4mm ball diameter. So if you have skinny enough wire, that could be doable, maybe, going back two or three rows of balls?It'll be interesting to see how people complete it.