Unlock the Power of the Triceratops System

1.d4 Nf6 2.Nf3 g6 3.Nbd2 c5

 

 

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1.d4 Nf6 2.Nf3 g6 3.Nbd2 c5 4.dxc5 4.e3 is playable but not challenging while after 4.c3 cxd4 5.cxd4 d5 we reach an Exchange Slav where the Knight is pisplaced on d2. 4...Qa5 4...Na6!? makes sense, leading to an original position after the logical 5.a3 Nxc5 6.b4 Ne6∞
5.a3 5.e4!? is quite interesting, especially as a surprise weapon. It leads to a completely different type of game. Nxe4 5...Qxc5 6.Bd3 6.e5 Ng4 7.Qe2 7.Ne4 Qb4+ 7...Qc7!? 8.Nc3 Bg7 9.Be2 Nxe5 10.0-0 7...Nc6 7...Bg7 8.Nc4 8.Ne4 Qb6 8...Nc6 8.Nb3±
Fressinet,L (2632)-Jain,K (2375) chess.com 2023
6...Bg7 7.0-0 0-0 8.c4 This move which stops ...d7-d5 is obviously not the only way to treat this position. d6 9.h3
Vallejo Pons,F (2705)-Saric,I (2628) Warsaw 2013
5...Bg7 6.Nd4 6.Qe2 Qxc5
Aronian,L (2780)-Grischuk,A (2781) Stavanger 2015
6...Nxe4 7.N4b3 Qa4 8.Bd3 Nxd2 9.Qxd2 Nc6 9...b6 10.0-0 0-0 11.Re1
Fressinet,L (2625)-Maze,S (2554) Chartres 2019
6.b4 Qxb4 7.Rb1 Qa4 7...Qa5 8.Rb5 Qa4 8...Qxb5? 9.Bxb5 Nc3 10.Bb2 Nxd1 11.Bxh8±
Addicks,J-Euwe,M Amsterdam 1923
9.Bb2 Rg8 10.Nxe4 Qxe4+ 11.Be2
8.Bb5 Qa5 9.Bb2 Nxd2 10.Nxd2 Qxb5 11.Bxh8
Now the machine suggests either 11...Qa6 or 11...Qc6 when Black has got a compact pawn-structure, a pawn and the pair of Bishops in return for the exchange, but also the permanent concern of what to do with his King.
5...Qxc5 6.b4 Qc7 6...Qc3 7.Rb1 should rather favour White slightly compared to 6...Qc7 7.Bb2 Bg7 8.c4
This is the main line for the 3...c5 variation. White will then have to choose if he prefers to fianchetto his light-squared Bishop or rather place it on e2. Some illustrative games : 8...d6 8...0-0 9.e3 b6 10.Be2 Bb7 11.0-0 d6 12.Rc1 Nbd7 13.Nb1 Rac8 14.Nc3 Qb8 15.Qb3 Qa8 16.Rfd1 a6
Tabatabaei,M (2655)-Yoo,C (2573) chess.com 2022
9.g3 b6 10.Bg2 Bb7 11.0-0 0-0 12.Qb3 12.e4 Nbd7 The committal 12...e5 can be tried at some point. It leaves Black with a chronically weakened d5 square and a backward ---d--- pawn, but the white Cavalry is a long way from reaching d5. In order to be able able applying pressure on d6 White would also need to cover his c4 and e4 pawns first, so all in all the radical ...e5 looks playable. 12...Nxe4?? 13.Bxg7 Kxg7 14.Nxe4 Bxe4 15.Qd4++- 13.Qe2 Rac8 13...a6 14.Rfe1 Rac8 15.Rac1 Qb8 16.Red1 Qa8 17.Ne1 Rc7 18.Nd3 Rfc8=
Kuzubov,Y (2637)-Ivic,V (2620) Riga 2021
14.Rac1 Qb8 15.Ne1 e6 16.Nd3 Rfd8 17.Rfd1 Qa8 18.f3 Bc6
19.Nf1 19.b5 Bb7 20.Nb3 a6 21.a4
White should retain slightly better prospects due to his space advantage.
19...Qb8 20.Ne3 Bb7 21.Rc2
Van Wely,L (2667)-Caruana,F (2820) Wijk aan Zee 2015 was still balanced and if the American eventually prevailed the opening wasn't to be blamed. Instead of his last move White could also have started operating on the kingside, with 21.g4!?
12...Nbd7 13.Rac1 Rac8 13...a5!? is very sensible, especially now that the white Rook left the ---a--- file. 14.Rfd1 Rfc8 15.Bh3 axb4 16.axb4 Qc6 17.Nf1
Note this manoeuvre, rerouting the Knight to e3. 17...e6 18.Bg2 Qa4 19.Qc3!? d5 19...Ne8!? 20.Ne3?! 20.Ra1= 20...dxc4 21.Ng4 Qb3??
22.Rxd7! Qxc3 23.Nxf6+ Qxf6 24.Bxf6 Bc6 25.Ne5+- Navara,D (2733)-Ragger,M (2701) Düsseldorf 2018
14.Rfd1 Rfd8 14...Qb8 15.Nf1 Rfe8 16.Ne3 a6 17.g4
Indjic,A (2607)-McShane,L (2674) lichess.org 2021
15.Nf1 Qb8 16.Ne3 As I understand the position, the most promising strategy for White seems to wait until the black Queen is far away from the kingside, on a8, to start a flank action there. e6 16...Qa8 17.g4 17.h4 17...h6 18.h4
Xiong,J (2656)-Jones,G (2677) Douglas 2018
17.Qa2 17.h4 17.Bc3 17...Ne8 18.Bxg7 Kxg7 19.Qb2+ Ndf6 20.g4
Kuzubov,Y (2663)-Ragger,M (2672) Brest 2018 White had the upper hand. 20.Bh3!? 20.b5
WhiteEloWBlackEloBResYearECOEventRnd
A) 1.d4 Nf6 2.Nf3 g6 3.Nbd2--