GAME 26
Stockfish also preferred the 5...Ba5 variation, and likewise returned the gambit pawn.
The game changed tack to the previous one when Komodo Dragon played 13. e5.
White played for space on the kingside, with several pawn advances, but after 31...Ne6, was happy to acquiesce in a threefold repetition.
Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
Danish Gambit
1. e4 e5 2. d4 exd4 3. c3 *
After 3...dxc3, Alekhine recommended that White play 4.Nxc3. This line often transposes into the Göring Gambit of the Scotch Game. There are only few lines with Black omitting ...Nc6 and/or White omitting Nf3. This move order enables White to avoid the critical main line of the Göring Gambit (1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Nxc3 Bb4) by keeping open the option of meeting an early ...Bb4 by developing the king's knight to e2 rather than f3 and thus preventing Black from disrupting White's queenside pawn structure.
After Lindehn's continuation: 4.Bc4, Carl Schlechter recommended one of the most reliable defenses for Black: by returning one of the pawns with 5...d5, Black gains time to complete development.
The popularity of the Danish plummeted after Schlechter's defense was introduced as the resulting positions are not what White generally desires from a gambit opening.
https://en.wikipedia.org/wiki/Danish_Gambit
1. e4 e5 2. d4 exd4 3. c3 *
After 3...dxc3, Alekhine recommended that White play 4.Nxc3. This line often transposes into the Göring Gambit of the Scotch Game. There are only few lines with Black omitting ...Nc6 and/or White omitting Nf3. This move order enables White to avoid the critical main line of the Göring Gambit (1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Nxc3 Bb4) by keeping open the option of meeting an early ...Bb4 by developing the king's knight to e2 rather than f3 and thus preventing Black from disrupting White's queenside pawn structure.
After Lindehn's continuation: 4.Bc4, Carl Schlechter recommended one of the most reliable defenses for Black: by returning one of the pawns with 5...d5, Black gains time to complete development.
The popularity of the Danish plummeted after Schlechter's defense was introduced as the resulting positions are not what White generally desires from a gambit opening.
https://en.wikipedia.org/wiki/Danish_Gambit
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
GAME 27
As black, Komodo Dragon ignored the c3 pawn, preferring to nab the e-pawn instead.
Then with 8. Nf3, Stockfish surrendered a second pawn as well!
Even so, both engines were evaluating the position as 0.00 even this early.
In order to complete development without any issues, Komodo Dragon gave the two pawns back, and following a series of exchanges, we were into an ending by move 25 with rook, knight and five pawns for each side.
Stockfish developed a clamp on the black kingside, allowing the capture of two of its own pawns, confident in the knowledge that the resulting two black connected passed pawns on the a and b files, could be picked off as desired. The position after 32...Rxa2 shows this.
Stockfish could have taken the draw at any time, but chose to play the game out to tablebases adjudication.
As black, Komodo Dragon ignored the c3 pawn, preferring to nab the e-pawn instead.
Then with 8. Nf3, Stockfish surrendered a second pawn as well!
Even so, both engines were evaluating the position as 0.00 even this early.
In order to complete development without any issues, Komodo Dragon gave the two pawns back, and following a series of exchanges, we were into an ending by move 25 with rook, knight and five pawns for each side.
Stockfish developed a clamp on the black kingside, allowing the capture of two of its own pawns, confident in the knowledge that the resulting two black connected passed pawns on the a and b files, could be picked off as desired. The position after 32...Rxa2 shows this.
Stockfish could have taken the draw at any time, but chose to play the game out to tablebases adjudication.
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
GAME 28
Stockfish was the first to change paths from the previous game, with 15...Re8.
However, a similar thing was Stockfish also returning the two pawn deficit.
Komodo Dragon then gave up its a-pawn in return for getting its queen and rook lined up along the seventh rank
Stockfish could have taken a perpetual check, but decided that it may as well see how its two connected passed pawns on the a and b files would fare, in comparison with Komodo Dragon's lone passed d-pawn.
In an interesting twist, Stockfish gave up its knight to gain a tempo, but in fact, Komodo Dragon had to give up its knight as well, to stop the threat of the black pawns.
A drawn rook and pawns ending eventuated.
Stockfish was the first to change paths from the previous game, with 15...Re8.
However, a similar thing was Stockfish also returning the two pawn deficit.
Komodo Dragon then gave up its a-pawn in return for getting its queen and rook lined up along the seventh rank
Stockfish could have taken a perpetual check, but decided that it may as well see how its two connected passed pawns on the a and b files would fare, in comparison with Komodo Dragon's lone passed d-pawn.
In an interesting twist, Stockfish gave up its knight to gain a tempo, but in fact, Komodo Dragon had to give up its knight as well, to stop the threat of the black pawns.
A drawn rook and pawns ending eventuated.
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
Budapest Gambit
1. d4 Nf6 2. c4 e5 *
After 3.dxe5 Black can try the Fajarowicz variation 3...Ne4 which concentrates on the rapid development of pieces, but the most common move is 3...Ng4 with three main possibilities for White. The Adler variation 4.Nf3 sees White seeking a spatial advantage in the centre with his pieces, notably the important d5-square. The Alekhine variation 4.e4 gives White an important spatial advantage and a strong pawn centre. The Rubinstein variation 4.Bf4 leads to an important choice for White, after 4...Nc6 5.Nf3 Bb4+, between 6.Nbd2 and 6.Nc3. The reply 6.Nbd2 brings a positional game in which White enjoys the bishop pair and tries to break through on the queenside, while 6.Nc3 keeps the material advantage of a pawn at the cost of a weakening of the white pawn structure. Black usually looks to have an aggressive game (many lines can shock opponents that do not know the theory) or cripple White's pawn structure.
The Budapest Gambit contains several specific strategic themes. After 3.dxe5 Ng4, there is a battle over White's extra pawn on e5, which Black typically attacks with ...Nc6 and (after ...Bc5 or ...Bb4+) ...Qe7, while White often defends it with Bf4, Nf3, and sometimes Qd5. In the 4.Nf3 variation the game can evolve either with Black attacking White's kingside with manoeuvres of rook lifts, or with White attacking Black's kingside with the push f2–f4, in which case Black reacts in the centre against the e3-pawn. In numerous variations the move c4–c5 allows White to gain space and to open prospects for his light-square bishop. For Black, the check Bf8–b4+ often allows rapid development.
https://en.wikipedia.org/wiki/Budapest_Gambit
1. d4 Nf6 2. c4 e5 *
After 3.dxe5 Black can try the Fajarowicz variation 3...Ne4 which concentrates on the rapid development of pieces, but the most common move is 3...Ng4 with three main possibilities for White. The Adler variation 4.Nf3 sees White seeking a spatial advantage in the centre with his pieces, notably the important d5-square. The Alekhine variation 4.e4 gives White an important spatial advantage and a strong pawn centre. The Rubinstein variation 4.Bf4 leads to an important choice for White, after 4...Nc6 5.Nf3 Bb4+, between 6.Nbd2 and 6.Nc3. The reply 6.Nbd2 brings a positional game in which White enjoys the bishop pair and tries to break through on the queenside, while 6.Nc3 keeps the material advantage of a pawn at the cost of a weakening of the white pawn structure. Black usually looks to have an aggressive game (many lines can shock opponents that do not know the theory) or cripple White's pawn structure.
The Budapest Gambit contains several specific strategic themes. After 3.dxe5 Ng4, there is a battle over White's extra pawn on e5, which Black typically attacks with ...Nc6 and (after ...Bc5 or ...Bb4+) ...Qe7, while White often defends it with Bf4, Nf3, and sometimes Qd5. In the 4.Nf3 variation the game can evolve either with Black attacking White's kingside with manoeuvres of rook lifts, or with White attacking Black's kingside with the push f2–f4, in which case Black reacts in the centre against the e3-pawn. In numerous variations the move c4–c5 allows White to gain space and to open prospects for his light-square bishop. For Black, the check Bf8–b4+ often allows rapid development.
https://en.wikipedia.org/wiki/Budapest_Gambit
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
GAME 29
As white, Stockfish chose to give up castling rights with 8. Kf2, in return for quicker development and more space.
Komodo Dragon threatened to disrupt the white kingside with 13...g5, but after replying with 14. f5, Stockfish was fine, although it did end up ceding a pawn.
With 31. c5, Stockfish began to increase its advantage, as an avalanche of pawns won a piece for three pawns, but it was the follow-up shot 39...Nxg4, that led to a won endgame.
1-0 to Stockfish after 29 games.
As white, Stockfish chose to give up castling rights with 8. Kf2, in return for quicker development and more space.
Komodo Dragon threatened to disrupt the white kingside with 13...g5, but after replying with 14. f5, Stockfish was fine, although it did end up ceding a pawn.
With 31. c5, Stockfish began to increase its advantage, as an avalanche of pawns won a piece for three pawns, but it was the follow-up shot 39...Nxg4, that led to a won endgame.
1-0 to Stockfish after 29 games.
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
GAME 30
Komodo Dragon was first to vary, with the more traditional 4. Nf3.
Stockfish took aim at the white kingside, but after a series of exchanges, only came away with more active play on the queenside.
However, Komodo Dragon was able to neutralize the situation, even ending up with an extra pawn, but the resulting endgame of rook, bishop and four pawns against rook, knight and three pawns, was pretty much equal, with the pawns all being on the kingside.
End result - draw.
Komodo Dragon was first to vary, with the more traditional 4. Nf3.
Stockfish took aim at the white kingside, but after a series of exchanges, only came away with more active play on the queenside.
However, Komodo Dragon was able to neutralize the situation, even ending up with an extra pawn, but the resulting endgame of rook, bishop and four pawns against rook, knight and three pawns, was pretty much equal, with the pawns all being on the kingside.
End result - draw.
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
Smith-Morra Gambit
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 *
White sacrifices a pawn to develop quickly and create attacking chances. In exchange for the gambit pawn, White has a piece developed after 4.Nxc3 and a pawn in the center, while Black has an extra pawn and a central pawn majority. The plan for White is straightforward and consists of placing his bishop on c4 to attack the f7-square, and controlling both the c- and d-files with rooks, taking advantage of the fact that Black can hardly find a suitable place to post his queen.
The Smith–Morra is uncommon in grandmaster games, but is popular at club level. It does not have a definitive refutation.
https://en.wikipedia.org/wiki/Smith%E2% ... rra_Gambit
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 *
White sacrifices a pawn to develop quickly and create attacking chances. In exchange for the gambit pawn, White has a piece developed after 4.Nxc3 and a pawn in the center, while Black has an extra pawn and a central pawn majority. The plan for White is straightforward and consists of placing his bishop on c4 to attack the f7-square, and controlling both the c- and d-files with rooks, taking advantage of the fact that Black can hardly find a suitable place to post his queen.
The Smith–Morra is uncommon in grandmaster games, but is popular at club level. It does not have a definitive refutation.
https://en.wikipedia.org/wiki/Smith%E2% ... rra_Gambit
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Graham Banks
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
GAME 31
A pretty low key affair, with Komodo Dragon eventually returning the pawn in order to complete development with a balanced position.
After 21...Nh5, the two engines were happy to take a threefold repetition.
A pretty low key affair, with Komodo Dragon eventually returning the pawn in order to complete development with a balanced position.
After 21...Nh5, the two engines were happy to take a threefold repetition.
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Modern Times
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Re: Stockfish 16CPU v Komodo Dragon 16CPU (LTC Gambits Match)
Well, after 29 games the draw run was broken !