Blog #10: (Part 1) A Comprehensive Guide to Defeat Agent Chess Bot
Hi chess.com friends, it's me @KDK_FanRepairs1009!! 
Have you ever wished to defeat someone who is much higher rated than you? If so, this blog is the perfect blog for you! 
I would like to remind you all that the Agent Chess Bot will not be in chess.com for a long time, so please hurry if you want to pull off the win and show off to your friends! 
I am proud to announce that I've found the secret algorithm to defeat this chess bot! There are only a couple of exceptions which I will mention as we go along the flow. 
Here are the first few criteria to take note of:
- Must play with the white pieces.
- Requires opening preparation
- Able to understand the idea behind each move in the main line
- Able to convert an endgame of significant material advantage
- The first 8 moves in the opening MUST match the sequence of moves below
Main line in the opening
1. e4 e5 2. Nf3 Qf6 3. Bc4 Qh6 4. Nxe5 Qg5
5. Qf3 Nh6 6. Nxf7 Nxf7 7. Qxf7+ Kd8 8. O-O Qe7
Agent Chess is programmed to play this main line around 30-50% of the time! The next criteria is surely you have to try your best and memorise this line.
Main line in the middle game
This is where things start to get a little tricky! But please do not worry, as this bot is programmed to play the next 16 moves >70% of the time! It is simply insane! 
9. Qf3 Nc6 10. Nc3 Ne5 11. Qg3 Nxc4 12. d3 h6
13. Nd5 Qc5 14. dxc4 Qxc4 15. Qh4+ Ke8 16. Qh5+ Kd8
17. Bg5+ hxg5 18. Qxh8 Ke8 19. Qh5+ Kd8 20. Qxg5+ Ke8
21. Qg6+ Kd8 22. Qf7 Qc5 23. b4 Qd6 24. e5 Qxb4
Converting the endgame into a victory
And finally, take a sigh of relief or savour the moment before playing Nxb4! I have repeated this countless times as it is just so satisfying! What a game!
From this point onwards, there're so many ways to win this game. For beginners, if the pawn on g7 is free, just capture it and push your g- and h-pawns in order to promote them into queens! But please do not hang any of your pieces or else you might end up losing instead! It is actually really straightforward, you know. 
For advanced players, develop the rooks to the d- and e-files and go for an immediate checkmate! Here're some examples from my own games. 
Example #1
25. Nxb4 Bxb4 26. Rad1 d6 27. e6 Bxe6 28. Qxe6 Rc8
29. Rfe1 Bxe1 30. Rxe1 g5 31. Qe7# 1-0
Example #2
25. Nxb4 Bxb4 26. Rad1 d6 27. e6 Bxe6 28. Qxe6 c6
29. Rxd6+ Kc7 30. Rd7+ Kb6 31. Qb3 Ka5 32. c3 Bc5
33. Rxb7 Re8 34. Rb4 Bxb4 35. Qxb4+ Ka6 36. Rb1 Re1+
37. Rxe1 g6 38. Rb1 g5 39. Qa3# 1-0
Example #3
25. Nxb4 Bxb4 26. Rad1 c6 27. Rxd7+ Bxd7 28. Rd1 Be7
29. e6 Kc7 30. Qxe7 b5 31. Rxd7+ Kb6 32. Rb7+ Ka6
33. Qc7 c5 34. Qc6+ Ka5 35. Qxb5# 1-0
Finding a quick checkmate is so easy as black's pieces are stuck behind a wall of pawns. The rook is simply trapped in the corner of the board! It is nearly impossible for black to activate the rook on time and rescue the black king. 
Possible side lines from the main line
There are myriads of possible moves the Agent Chess bot could play. It is impossible for me to cover every single side line. That's why I will go through some of the possible moves, just in case you are struck with a different move. It is helpful to remember that the winning idea is usually very similar to the main line.
Of course, the first eight moves of the game are absolutely fixed so I will not waste your time by going through the rest of the possible opening lines. 
Hold on! On move 8, black has the option of playing Nc6 instead of Qe7. If you are ready for a challenge and willing to push your boundaries, stay tuned to my next blog! I will show you various lines which you might face in GREAT detail.
But if you are just a beginner who just crave the feeling of beating the bot using 'your own skill', I guarantee that there's a very high chance the first 25 moves of the main line will happen on your very first try!
Between moves 9 to 13, there is the tiniest chance a different move will be played. If the bot suddenly decides to move something out of the ordinary, you shouldn't groan but instead applaud your own unluckiness! 
On move 14 of the main line, instead of Qxc4, if the bot plays b6 or a5 against you, don't panic! Play Be3 first to deflect the queen from the a3-h8 diagonal. On the next move, after the queen is deflected, simply play Qh4+ and the game goes on exactly the same as the main line, just one extra move! 
If the bot plays Rh7, you can still play Be3. However, after the queen is deflected, the following line won't match the main line, now that the rook is on h7 instead of h8! You can still apply the idea of sacrificing the bishop for the rook, but it's only a +4 advantage so you have to be really careful. 
The only move which spells terrible luck is the move d6 on move 14. It is indeed the best move and things will get very complicated. I suggest you to just start over again. Sorry!
Let's move on to move 18 of the main line. Here, instead of the move Ke8, the bot might try the interesting idea of Qc5! I got hit by this move only once in 1000 games! However, it is a blunder and it actually makes your life much easier. Just calmly skip to the 23rd move of the main line and play b4, when after the Qxb4 you simply recapture the queen with your knight! 
If the queen tries to run to d6, play e5 to deflect the queen again! Now the queen has no where good to hide as you are threatening to capture the hanging bishop with checkmate. The bot will either play Qxb4 or Qe7 and you just capture the queen with your knight. Congrats, the bot went for a different move but you captured his queen anyways! Below shows an example: 
18. Qxh8 Qc5 19. b4 Qe7 20. Nxe7 Kxe7 21. f4 d6
22. fxg5 Be6 23. g6 c5 24. bxc5 Re8 25. cxd6+ Kxd6
26. Rxf8 Rxf8 27. Qxf8+ white wins
We will move on to move 19, where instead of Kd8, the bot might play g6 and attempt to delay your checks. It is absolutely pointless as you are simply going to capture on g6 and continue with the same plan according to the main line, just a one move delay! But you see, it's actually not that simple so I'm going to show you an example. 
19. Qh5+ g6 20. Qxg6+ Kd8 21. Qxg5+ Ke8 22. Qg6+ Kd8
23. Qf7 Qc5 24. b4 Qd6 25. e5 Qh6 26. e6 dxe6
27. Nf6 Qxf6 28. Qxf6+ white wins
Needless to say, if the bot dares to play Qd6 on move 23, strike with e5! This move attempts to deflect the queen away from defending the bishop so the only good option is to play Qxb4. There goes his queen!
Thank you for reading this blog until the very end! I hope you enjoy this blog and may you have good luck defeating the Agent Chess bot! Impress you friends too, why not! If there is any mysterious line I missed, feel free to message me in the comments section below! See you in my next blog where I will teach you how to respond to Nc6 instead of the main line Qe7! 
P.S. Please check out my previous series on the Acciaccatura Attack! Thank you!!
Peace out! @KDK_FanRepairs1009
Goodbye! 再见! さようなら! Adiós! Au revoir!
