Why My move is brillant?

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chesswithkeshav

Megakiller-1

Press the ‘show moves’ button, or unlock diamond to let the coach tell you

tygxc

It is a nice winning move: a sacrifice and a quiet move: no check or capture. However, there were other winning moves as well, as black is up so much material, so it should not be considered brilliant.

scamo_1

:/

AturnMarso
Because whites dark squares bishop attacks d8, and that rook is on that square which is a sacrifice, and sacrifices often lead to brilliant moves.