How many moves did Magnus calculated to sac his Bishops?

[Chessqueen]

That was a tremendous sac by Magnus, How many moves did Magnus calculated to Sac his Bishops?

Hikaru full of Smiles ==>

This is how Stockfish would have played it, but with an advantage to Black
[pgn][Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2022.10.27"]
[Round "?"]
[White "Stockfish_22100816_x64_avx2"]
[Black "Stockfish_22100816_x64_avx2"]
[Result "*"]
[BlackElo "3500"]
[Time "19:24:23"]
[WhiteElo "3500"]
[TimeControl "120+1"]
[SetUp "1"]
[FEN "qnbrkrnb/pppppppp/8/8/8/8/PPPPPPPP/QNBRKRNB w - - 0 1"]
[Termination "unterminated"]
[PlyCount "18"]
[WhiteType "program"]
[BlackType "program"]

1. b3 g5 2. Qxh8 Nf6 {(Ng8-f6 Qh8-g7 Rf8-g8 Qg7-h6 d7-d5 h2-h4 Rg8-g6
Qh6xg5 Rg6xg5 h4xg5 Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6 Rd1-d2 a7-a5 e2-e3
Nc6-b4 a2-a3 Nb4-a2 Bc1-b2 Qa8-a6 g2-g3 h7-h6 f3-f4 a5-a4 b3-b4 Bc8-f5
g5xh6 Qa6xh6 Ng1-f3 Qh6-e6 g3-g4 Bf5xg4 Nf3-e5 Nb8-c6 Ne5xg4 Qe6xg4 Bh1-f3
Qg4-e6 Ke1-e2 Nc6-a7 c2-c4 d5xc4 d4-d5 Qe6-a6 Ke2-f2 c4-c3 Bb2xc3 Na2xc3
Nb1xc3) +1.78/33 4} 3. Qg7 {(Qh8-g7 Rf8-g8 Qg7-h6 d7-d5 h2-h4 Rg8-g6 Qh6xg5
Rg6xg5 h4xg5 Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6 Rd1-d2 a7-a5 e2-e3 Nc6-b4
a2-a3 Nb4-a2 Bc1-b2 Qa8-a6 g2-g3 a5-a4 Ke1-f2 Qa6-c6 Rf1-e1 Bc8-f5 e3-e4
Bf5-g6 b3-b4 Nb8-d7 e4xd5 Qc6xd5 Bh1-g2 Qd5xg5 f3-f4 Qg5-b5 Ng1-f3 Nd7-b6
Bg2-f1 Qb5-d5 Re1-e5 Qd5-d7 Rd2-e2 f7-f6 Re5xe7+ Qd7xe7 Re2xe7+ Ke8xe7)
-1.42/36 15} Rg8 {(Rf8-g8 Qg7-h6 d7-d5 h2-h4 Rg8-g6 Qh6xg5 Rg6xg5 h4xg5
Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6 g2-g4 a7-a5 Nb1-c3 a5-a4 e2-e3 a4xb3 a2xb3
Nc6-b4 Rd1-d2 c7-c5 Bh1-g2 c5xd4 e3xd4 Nb8-c6 Ng1-e2 e7-e5 Ke1-f2 Qa8-a6
d4xe5 d5-d4 Nc3-e4 d4-d3 c2xd3 Nb4xd3+ Kf2-g3 Nd3xc1 Rd2xd8+ Ke8xd8 Rf1-d1+
Kd8-c7 Ne2xc1 Nc6xe5 Nc1-d3 Ne5xd3 Bg2-f1 Qa6-b6 Bf1xd3 Qb6xb3 Ne4-f2)
+1.40/38 18} 4. Qh6 {(Qg7-h6 d7-d5 h2-h4 Rg8-g6 Qh6xg5 Rg6xg5 h4xg5 Nf6-g4
f2-f3 Ng4-e5 d2-d4 Ne5-c6 Rd1-d2 a7-a5 Nb1-c3 a5-a4 e2-e3 Nc6-b4 g2-g4
a4xb3 a2xb3 c7-c5 Ng1-e2 c5xd4 e3xd4 Nb8-c6 Ke1-f2 Qa8-a5 Bh1-g2 e7-e5
d4xe5 d5-d4 Nc3-e4 d4-d3 c2xd3 Nb4xd3+ Kf2-g3 Nd3xc1 Rd2xd8+ Ke8xd8 Rf1-d1+
Kd8-c7 Rd1xc1 Qa5xe5+ f3-f4 Qe5-b2 Bg2-f3 Bc8-e6 Rc1-h1 Nc6-d4 Ne2xd4
Qb2xd4 Rh1-d1 Qd4-e3 Ne4-f6 Be6xb3 Rd1-d7+ Kc7-c8 Rd7xb7 Qe3-g1+ Bf3-g2
Qg1-e1+ Kg3-h2 Qe1-e3) -1.46/41 12} d5 {(d7-d5 h2-h4 Rg8-g6 Qh6xg5 Rg6xg5
h4xg5 Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6 g2-g4 a7-a5 Nb1-c3 a5-a4 e2-e3
Nc6-b4 Rd1-d2 c7-c5 Ng1-e2 a4xb3 a2xb3 c5xd4 e3xd4 Qa8-a5 Ke1-f2 Nb8-c6
Kf2-g3 f7-f5 g5xf6/ep Rd8-d6 f6-f7+ Ke8xf7 Bh1-g2 h7-h5 Rf1-h1 h5xg4 f3xg4
Rd6-g6 Rh1-h4 Rg6-g8 Ne2-f4 Kf7-e8 Nc3xd5 Nb4xc2 Rh4-h5 Qa5-a2 Bg2-f3
Qa2xb3 Rd2-d3 Qb3-b1) +1.30/35 2} 5. h4 {(h2-h4 Rg8-g6 Qh6xg5 Rg6xg5 h4xg5
Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6 Rd1-d2 a7-a5 e2-e3 a5-a4 Nb1-c3 a4xb3
a2xb3 Nc6-b4 g2-g4 c7-c5 Ng1-e2 c5xd4 e3xd4 Nb8-c6 Ke1-f2 Qa8-a5 Rf1-d1
Rd8-d6 Nc3-a4 f7-f5 g4xf5 Bc8xf5 c2-c3 Nb4-a6 Bh1-g2 Rd6-g6 f3-f4 b7-b5
Na4-b2 b5-b4 c3-c4 Bf5-e4 Bg2xe4 d5xe4 Ne2-g3 e4-e3+ Kf2xe3 h7-h6 Ke3-f3
h6xg5 f4-f5 Rg6-h6 Kf3-g2 Na6-c7) -1.33/42 15} Rg6 {(Rg8-g6 Qh6xg5 Rg6xg5
h4xg5 Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6 Rd1-d2 a7-a5 Nb1-c3 a5-a4 e2-e3
Nc6-b4 g2-g4 Qa8-a6 Ng1-e2 a4xb3 a2xb3 Qa6-g6 Bh1-g2 Nb4xc2+ Ke1-f2 Nc2-b4
Ne2-f4 Qg6xg5 Rf1-h1 c7-c5 Rh1xh7 c5xd4 Rh7-h8+ Ke8-d7 Rh8-h5 Qg5xh5 g4xh5
d4xc3 Rd2-d1 Kd7-e8 h5-h6 Ke8-f8 e3-e4 d5-d4 Bg2-h3 Kf8-g8 Bh3xc8 Rd8xc8
Rd1xd4 Nb4-a2 Nf4-d3 Kg8-h7 Rd4-c4 Rc8-d8 Kf2-e2 b7-b5 Rc4-c5 Nb8-a6)
+1.40/36 1} 6. Qxg5 {(Qh6xg5 Rg6xg5 h4xg5 Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6
Rd1-d2 a7-a5 Nb1-c3 a5-a4 e2-e3 a4xb3 a2xb3 Nc6-b4 g2-g4 c7-c5 Ng1-e2 c5xd4
e3xd4 Nb8-c6 Ke1-f2 Qa8-a5 Bh1-g2 e7-e5 d4xe5 d5-d4 Nc3-e4 d4-d3 c2xd3
Nb4xd3+ Kf2-g3 Nd3xc1 Rd2xd8+ Ke8xd8 Rf1xc1 Nc6xe5 f3-f4 Bc8xg4 Ne2-d4
Ne5-d3 Rc1-c3 Nd3-e1 Kg3xg4 Ne1xg2 Rc3-d3 Kd8-c7 Ne4-c3 Kc7-c8 Kg4-g3
Ng2-e1 Rd3-e3 Qa5-b4 Nc3-b5) -1.39/37 6} Rxg5 {(Rg6xg5 h4xg5 Nf6-g4 f2-f3
Ng4-e5 d2-d4 Ne5-c6 Rd1-d2 a7-a5 Nb1-c3 a5-a4 e2-e3 Nc6-b4 g2-g4 a4xb3
a2xb3 c7-c5 Ng1-e2 Nb8-c6 Ke1-f2 c5xd4 e3xd4 Qa8-a5 Rf1-d1 Rd8-d6 Nc3-a4
f7-f6 c2-c3 Nb4-a6 Bc1-a3 Rd6-d8 g5xf6 b7-b5 f6xe7 Rd8-d7 Ba3-b4 Nc6xb4
c3xb4 Na6xb4 Rd1-c1 Rd7-c7 Na4-c3 Ke8xe7 Bh1-g2 Ke7-f8 Rc1-d1 Rc7-c6)
+1.31/32 1} 7. hxg5 {(h4xg5 Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6 g2-g4 a7-a5
Nb1-c3 Nc6-b4 Rd1-d2 a5-a4 e2-e3 a4xb3 a2xb3 c7-c5 Ng1-e2 c5xd4 e3xd4
Nb8-c6 Ke1-f2 Qa8-a5 Bh1-g2 e7-e5 d4xe5 d5-d4 Nc3-e4 d4-d3 c2xd3 Nb4xd3+
Kf2-g3 Nd3xc1 Rd2xd8+ Ke8xd8 Rf1xc1 Nc6xe5 Ne2-f4 Qa5-a3 Rc1-c3 b7-b6
Nf4-d3 Ne5-g6 f3-f4 Bc8-b7 Bg2-f3 Bb7xe4 Bf3xe4 Qa3-a1 Rc3-c1 Qa1-d4 Rc1-d1
Kd8-c7 Be4-f3) -1.52/36 6} Ng4 {(Nf6-g4 f2-f3 Ng4-e5 d2-d4 Ne5-c6 Rd1-d2
a7-a5 e2-e3 a5-a4 Nb1-c3 Nc6-b4 g2-g4 a4xb3 a2xb3 c7-c5 Ng1-e2 c5xd4 e3xd4
Nb8-c6 Ke1-f2 Qa8-a5 Kf2-g3 f7-f5 g5xf6/ep Rd8-d6 f6xe7 Rd6-f6 Rf1-g1
Nc6xe7 Kg3-f2 h7-h5 g4xh5 Bc8-f5 Bh1-g2 Rf6-c6 Rg1-h1 Nb4xc2 Nc3-a4 Nc2-b4
h5-h6 Nb4-d3+ Rd2xd3 Bf5xd3 h6-h7 Ne7-g6 h7-h8R+ Ng6xh8 Rh1xh8+ Ke8-f7)
+1.41/33 1} 8. f3 {(f2-f3 Ng4-e5 d2-d4 Ne5-c6 g2-g4 a7-a5 Nb1-c3 Nc6-b4
Rd1-d2 a5-a4 e2-e3 a4xb3 a2xb3 c7-c5 Ng1-e2 c5xd4 e3xd4 Qa8-a5 Bh1-g2
Nb8-c6 Ke1-f2 e7-e5 d4xe5 d5-d4 Nc3-e4 d4-d3 c2xd3 Nb4xd3+ Kf2-g3 Nd3xc1
Rd2xd8+ Ke8xd8 Rf1xc1 Nc6xe5 f3-f4 Bc8xg4 Ne2-d4 Ne5-d3 Rc1-c3 Nd3-e1
Kg3xg4 Ne1xg2 Rc3-d3 Kd8-c7 Ne4-c3 Kc7-c8 Nd4-f3 Qa5-a6 Nf3-e5 Qa6-e6+
Kg4-g3) -1.47/36 5} Ne5 {(Ng4-e5 d2-d4 Ne5-c6 g2-g4 a7-a5 Nb1-c3 Nc6-b4
Rd1-d2 a5-a4 e2-e3 a4xb3 a2xb3 c7-c5 Ng1-e2 c5xd4 e3xd4 Nb8-c6 Ke1-f2
Qa8-a5 Kf2-g3 f7-f5 g5xf6/ep Rd8-d6 f6xe7 Rd6-f6 f3-f4 Nc6xe7 Bh1-f3 h7-h5
g4-g5 h5-h4+ Kg3-f2 Rf6-c6 Bc1-b2 Ne7-f5 Rf1-h1 Qa5-c7 Bb2-a3 Rc6xc3
Bf3-h5+ Ke8-d8 Ba3xb4 Rc3-e3 Rh1xh4 Nf5xh4 Kf2xe3 Nh4-f5+ Ke3-f3) +1.48/32
3} 9. d4 {(d2-d4 Ne5-c6 g2-g4 a7-a5 Nb1-c3 Nc6-b4 Rd1-d2 a5-a4 e2-e3 a4xb3
a2xb3 c7-c5 Ng1-e2 c5xd4 e3xd4 Nb8-c6 Ke1-f2 Qa8-a5 Kf2-g3 f7-f5 g5xf6/ep
Rd8-d6 f6xe7 Rd6-f6 Rd2-d1 Nc6xe7 Ne2-f4 Nb4xc2 Nc3-e2 h7-h6 Bh1-g2 Bc8-d7
Rf1-h1 Bd7-b5 Rh1-h5 Bb5xe2 Nf4xe2 Qa5-b5 Rh5-e5 Qb5xb3 Rd1-h1 Ke8-f7
Bc1xh6) -1.23/33 9} Nec6 {(Ne5-c6 Rd1-d2 a7-a5 e2-e3 Nc6-b4 Nb1-c3 a5-a4
g2-g4 a4xb3 a2xb3 c7-c5 Ng1-e2 c5xd4 e3xd4 Qa8-a5 Ke1-f2 Nb8-c6 Kf2-g3
f7-f5 g5xf6/ep Rd8-d6 f6xe7 Rd6-f6 Rd2-d1 Nc6xe7 Ne2-f4 Nb4xc2 Nc3-e2
Bc8-d7 Bh1-g2 Bd7-b5 Rf1-h1 Bb5xe2 Nf4xe2 Qa5-b5 Ne2-f4 h7-h6 Rh1-h5)
+1.40/30 1} *[/pgn]

[Chessqueen]

But giving it more time Stockfish would have played this for White
[pgn][Event "Computer chess game"]
[Site "DESKTOP-OFQ3C0P"]
[Date "2022.10.27"]
[Round "?"]
[White "Stockfish_22100816_x64_avx2"]
[Black "Stockfish_22100816_x64_avx2"]
[Result "*"]
[BlackElo "3500"]
[Time "19:24:23"]
[WhiteElo "3500"]
[TimeControl "240+1"]
[SetUp "1"]
[FEN "qnbrkrnb/pppppppp/8/8/8/8/PPPPPPPP/QNBRKRNB w - - 0 1"]
[Termination "unterminated"]
[PlyCount "5"]
[WhiteType "program"]
[BlackType "program"]

1. b3 g5 2. Bb2 {(Bc1-b2 Bh8xb2 Qa1xb2 d7-d5 g2-g3 c7-c6 Bh1-g2 Nb8-a6
d2-d4 Bc8-f5 f2-f3 Ng8-f6 Nb1-c3 Bf5-g6 Ng1-h3 h7-h6 Nh3-f2 Qa8-c8 e2-e4
c6-c5) +0.80/27 4} Bxb2 {(Bh8xb2 Qa1xb2 d7-d5 g2-g3 c7-c6 Bh1-g2 Ng8-f6
Ng1-f3 Rf8-g8 Rf1-h1 c6-c5 d2-d4 b7-b6 c2-c3 Nb8-c6 d4xc5 b6xc5 Qb2-a3
Nf6-d7 Rd1xd5 Bc8-b7 Rd5xg5 Rg8xg5 Nf3xg5 Nc6-d4 c3xd4 Bb7xg2 Rh1-g1 h7-h6
f2-f3 h6xg5 Rg1xg2 c5xd4) -0.68/26 3} 3. Qxb2 {(Qa1xb2 d7-d5 g2-g3 c7-c6
c2-c4 Ng8-f6 Ng1-f3 Rf8-g8 h2-h4 g5xh4 Nf3xh4 Nb8-a6 c4xd5 c6xd5 Bh1-f3
Qa8-b8 Rf1-g1 e7-e5 a2-a3 Qb8-d6 d2-d3 Na6-c7 Nb1-c3 d5-d4 Nc3-e4 Nf6xe4
Bf3xe4 Nc7-b5) +0.69/25 1} *[/pgn]