looks possible, but why give black anything to play for? philidor is passive as it is, and then that ...a6 move wastes even more time. the only plus of it might have been playing ...b5/..Bb7, and they didnt even do that. youre up so much time Id say 0-0 and let them solve all the problems, which might be a lot harder for them than trying to hold the material. havnt looked through the whole sac yet though
sac in the opening
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this is a sac, which i've performed three times (with perfect success) against the philidor's defense (live chess). My opponents all played these weird moves, and I'm wondering if you ppl think this sac is sound and/or common.