Here are four trivial mate positions:
[d]8/8/R5n1/4k3/3R4/4K3/b5B1/8 w - - acn 13735292; acs 14; bm Rg4; ce 32754; dm 7; pv Rg4 Ne7 Re4+ Kf5 Rxe7 Bd5 Bxd5 Kg5 Rg7+ Kh5 Bf7+ Kh4 Rh6#;
[d]8/2n3B1/8/3k1K2/4R3/8/8/2R3b1 w - - acn 14160660; acs 15; bm Re7; ce 32754; dm 7; pv Re7 Nb5 Re5+ Kd6 Rxb5 Bh2 Rb7 Bg3 Bf8+ Kd5 Rd7+ Bd6 Rxd6#;
[d]8/1B5b/3K4/4R3/3k4/1n5R/8/8 w - - acn 14397376; acs 19; bm Rb5; ce 32754; dm 7; pv Rb5 Na5 Rxa5 Bc2 Bd5 Bd1 Raa3 Bb3 Bg2 Bd5 Rh4+ Be4 Rxe4#;
[d]1b3R2/8/8/3R4/2K1k3/8/1B3n2/8 w - - acn 14377816; acs 14; bm Rd2; ce 32754; dm 7; pv Rd2 Nd1 Rxd1 Bg3 Bd4 Bh4 Rdf1 Bf2 Bg7 Bg3 Re8+ Be5 Rxe5#;
They are the exact same position, which is fairly obvious.
The interesting thing is what happens when you analyze for a short time period with Stockfish.
Four trivial mates
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Dann Corbit
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Four trivial mates
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