Friday, August 18, 2023

Jerome Gambit: 5 Brilliant Moves for White

 



I found the following interesting exploration of the Jerome Gambit online...

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I scammed the chess.com algorithm and created a game with 5 brilliant moves for white.

So around 3 hours ago, I decided to learn Jerome Gambit Theory to play it against my friends and or my dad. I found some theory, but it wasn't all that extensive for the extremely dubious lines.

That's where my genius idea came in to find traps in the Jerome I'll never be able to use anyway. How? Using low depth Lc0 (pure positional, depth 4) and Stockfish (degraded because max depth 13).

For reference, the line which was played had a evaluation at 1 point of ~-7. But stockfish found a ridiculous perpetual. Ofc, I'm thinking at this point i should see if chess.com thinks it's brilliant as well.

Turns out, chess.com didn't think a rook sac was brilliant enough. But I've noticed in the past that it'll give random brilliant moves if the material is very imbalanced and you just keep checking.

So I made with the help of the engines a few more checks. That somehow gave the game 4 brilliant moves.

I was not satisfied.

So I made the decision to play the game on, checking if black could block with the queen and still draw the game. After a bit of analysis, it turned out that black did still have a draw.

At this point it was just about creating a situation where 1 player needs to make a single sacrifice to keep the game drawn. And Lc0 is perfect at creating these situations, since if Lc0 thinks it's winning, and stockfish thinks it's a draw, it'll most likely require a move that's hard to find at low depth (brilliant moves)

And low and behold, around 20 moves later, I saw an opportunity arise. Make a move for white that looks to be losing, black makes the best move, and the only drawn move for white is to sac a bishop.

Around 15 moves later, I can end the game in a theoretical draw and put it in chess.com's analysis. Low and behold, 5 brilliant moves by 1 player in 1 match.

https://cdn.discordapp.com/attachments/758702903673356328/823712773811863552/5_Brilliant_moves_in_Jerome_Gambit.jpg


If you want to see the pgn and chess.com's analysis, check here: https://www.chess.com/analysis/game/pgn/3WjoJuqjA6 

Engines begin playing after 7.f4.

 

Stockfish 12 NNUE (1 sec) - Lc0 (1 sec)

Testing Jerome Gambit, 2021

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+? Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8 7.f4? Nf6 8.Qxe5 d6 9.Qg5 h6 10.Qh4 Qe8 11.e5 dxe5 12.f5 Bxf5 13.Rf1 Bxc2?! 14.Qc4 Qg6?! 15.Qxc5+ Kg8?! 16.Qc4+ Kh7? 17.Rxf6!! gxf6 18.Qxc7+ Kg8 19.Qc4+! Kg7 20.Qc7+! Kf8 21.Qc5+! Ke8 22.Qb5+! Kd8 23.Qd5+! Kc8 24.Qe6+! Kb8 25.Qd6+! Kc8 26.Qe6+! Kd8 27.Qd5+! Ke8 28.Qb5+! Kf8 29.Qc5+!  Kf7 30.Qc4+! Ke7 31.Qc5+! Ke6 32.Qc4+! Kd6 33.Qb4+! Kd5 34.Qb5+ Ke6 35.Qc4+ Ke7 36.Qc5+ Ke8 37.Qb5+ Kf7 38.Qc4+ Kg7 39.Qc7+ Qf7 40.Qxc2 Qh5 41.Qc7+ Kg6 42.Qxb7 Qxh2 43.Nc3 Qg1+ 44.Ke2 Rhg8 45.d3 Rab8 46.Qe4+ Kf7 47.g3 Qh2+ 48.Kd1 Rxg3 49.Ne2 Rg2 50.b3 Qh1+ 51.Kd2 Qf1 52.Qh7+ Ke8 53.Qe7+ Kxe7 54.Ba3+ Ke6 55.Rxf1 h5 56.Rh1 Rh8 57.Ke3 h4 58.Rh3 f5 59.d4 f4+ 60.Kf3 Rxe2 61.Kxe2 e4 62.Bc5 Rh7 63.b4 Kf5 64.d5 Kg4 65.Rh1 h3 66.d6 h2 67.b5 Kg3 68.Be3 f3+ 69.Kf1 Rh5 70.d7 Rd5 71.Bf2+ Kh3 72.Bg1 Rxd7 73.Rxh2+ Kg3 74.Ke1 e3 75.Rc2 Rd3 76.Bh2+ Kg4 77.Bg1 Kf4 78.Rc7 f2+ 79.Bxf2 exf2+ 80.Kxf2 Rd2+ 81.Ke1 Rxa2 1/2-1/2


 


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