OpenLLM-France/wikimedia huggingface dataset:
# Caro-Kann Defence - Advance Variation, Tal Variation

White gains space on the kingside. Unlike in other variations of the Advance Caro-Kann, Black cannot play 4...e6 immediately, as 5. g4 would trap the bishop.

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4
* 4
* h5
* h6
* Qb6
* c5
* Na6
* a6
* Qd7
* f6
When contributing to this Wikibook, please follow the Conventions for organization.

## References

* Nunn's Chess Openings. 1999. John Nunn (Editor), Graham Burgess, John Emms, Joe Gallagher. ISBN 1-8574-4221-0.
* Modern Chess Openings: MCO-14. 1999. Nick de Firmian, Walter Korn. ISBN 0-8129-3084-3.
* Kasparov, Garry, & Keene, Raymond 1989 Batsford chess openings 2. ISBN 0-8050-3409-9.
* This Chess related article is a stub. Please assist Wikibooks by expanding it.
# Caro-Kann Defence - Botvinnik-Carls Defense

Black's second most popular move after 3...Bf5, named after World champion Mikhail Botvinnik. It is an attack on the stability of White's pawn formation. White is free to capture the pawn and break open the center, expecting plans of 4...e6 and 5...Bxc5 to recapture. 4...Nc6 is also a popular follow up, and Black is not in any rush to win back the pawn.
The most popular response to the Botvinnik-Carls Defense is surprisingly not the top engine move 4. dxc5, but rather the move 4. c3, defending the d4 pawn.
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# Caro-Kann - Botvinnik-Carls Defense - 4. c3

White’s most popular response to the Botvinnik-Carls Defense according to the Lichess database, accounting for more than half of white’s moves in the preceding position. While the move is neither the engine’s top choice, nor that of most grandmasters, it still leaves white with a small advantage. The objective of the move is to strengthen the center and enable a recapture with the pawn in the event of 4... cxd4. It is best for black to put more pressure on the d4 pawn before taking the pawn, which can best be done with the move 4... Nc6.
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## References

* ↑ "Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense". lichess.org. Retrieved 2024-08-09.
# Caro-Kann - Botvinnik-Carls Defense - 4. c3 Nc6

This is the best continuation for black after the move 4. c3 in response to the Botvinnik-Carls Defense. It adds pressure on the d4 pawn. The move 5. Nf3, defending the pawn, should be met with 5... cxd4 6. cxd4 Bg4. This sequence allows for sustained pressure on the d4 pawn, which can be increased via the g8-e7-f5 manoeuvre of the black knight.
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# Caro-Kann Advance Variation
## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
1.e4 c6 2.d4 d5 3.e5 Bf5 4. Nf3 e6 5. Be2 Nd7 6. O-O Ne7 7. Nh4 Bg6 8. Nd2 c5
| | 8 |
| 1 | c3 |
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## References

* Nunns Chess Openings. 1999. John Nunn (Editor), Graham Burgess, John Emms, Joe Gallagher. ISBN 1-8574-4221-0.
* Modern Chess Openings: MCO-14. 1999. Nick de Firmian, Walter Korn. ISBN 0-8129-3084-3.
* Kasparov, Garry, & Keene, Raymond 1989 Batsford chess openings 2. ISBN 0-8050-3409-9.
# Caro-Kann Advance Variation

The most common move in this position is 9...Nc6, forcing 10. Nxg6 hxg6 11. Nf3.

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
1.e4 c6 2.d4 d5 3.e5 Bf5 4. Nf3 e6 5. Be2 Nd7 6. O-O Ne7 7. Nh4 Bg6 8. Nd2 c5 9. c3
| 9 | 10 | 11 |
| ... Nc6 | Nxg6 hxg6 | Nf3 | ± |
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## References

* Nunns Chess Openings. 1999. John Nunn (Editor), Graham Burgess, John Emms, Joe Gallagher. ISBN 1-8574-4221-0.
* Modern Chess Openings: MCO-14. 1999. Nick de Firmian, Walter Korn. ISBN 0-8129-3084-3.
* Kasparov, Garry, & Keene, Raymond 1989 Batsford chess openings 2. ISBN 0-8050-3409-9.
# Caro-Kann Defence - Advance Variation

Debuted by Karpov against Anand in Tilburg in 1991, the game ended in defeat for Karpov, and 5...a6 has not been attempted in serious play again.

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 a6
* 6
* O-O
When contributing to this Wikibook, please follow the Conventions for organization.

## References

* Nunn's Chess Openings. 1999. John Nunn (Editor), Graham Burgess, John Emms, Joe Gallagher. ISBN 1-8574-4221-0.
* Modern Chess Openings: MCO-14. 1999. Nick de Firmian, Walter Korn. ISBN 0-8129-3084-3.
* Kasparov, Garry, & Keene, Raymond 1989 Batsford chess openings 2. ISBN 0-8050-3409-9.
# Caro-Kann Defence - Bayonet Attack

This dubious fourth move allows Black an equal or better position. Play may continue (1. e4 c6 2. d4 d5 3. e5 Bf5 4. g4) Be4! 5. f3 Bg6 6. h4 h5 7. Nh3 e6! 8. Nf4 hxg4 9. Nxg6 fxg6 10. fxg4 Rxh4.
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# False Friends of the Slavist/Map masa

Semasiological map for [masa]
R. масса • Blr. маса • Ukr. маса • Pol. masa • Ka. masa • LSo. masa • USo. masa • Cz. masa • Slk. masa • Sln. masa • Cr. masa • Bo. masa • Sb. маса • Mk. маса • Bg. маса •
| [masa] | Meanings: ‘table’ ‘mass’   no such word (For areas without shading there is no information yet.) |
| [masa] | Meanings | Meanings |
| [masa] | table | mass |
| R. масса | | + |
| Blr. маса | | + |
| Ukr. маса | | + |
| Pol. masa | | + |
| Ka. masa | | + |
| LSo. masa | | + |
| USo. masa | | + |
| Cz. masa | | + |
| Slk. masa | | + |
| Sln. masa | | + |
| Cr. masa | | + |
| Bo. masa | | + |
| Sb. маса | | + |
| Mk. маса | + | + |
| Bg. маса | + | + |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map mir

Semasiological map for *mirъ
R. мир • Blr. мір • Ukr. мир • Pol. mir • Ka. mir • LSo. měr • USo. měr • Cz. mír • Slk. mier • Sln. mir • Cr. mir • Bo. mir • Sb. мир • Mk. мир • Bg. мир •
| *mirъ | Meanings: ‘peace’ ‘quiet, stillness’ ‘world’ ‘hist. municipality, parish, commune’ ‘authority, prestige’   no such word (For areas without shading there is no information yet.) |
| *mirъ | Meanings | Meanings | Meanings | Meanings | Meanings |
| *mirъ | peace | quiet, stillness | world | hist. municipality, parish, commune | authority, prestige |
| R. мир | + | + | + | + | |
| Blr. мір | + | + | | | |
| Ukr. мир | + | + | | | |
| Pol. mir | | | | | + |
| Ka. mir | + | + | | | |
| LSo. měr | + | + | | | |
| USo. měr | + | | | | |
| Cz. mír | + | + | | + | |
| Slk. mier | + | + | | | |
| Sln. mir | + | + | | | |
| Cr. mir | + | + | | | |
| Bo. mir | + | + | | | |
| Sb. мир | + | + | | | |
| Mk. мир | + | + | | | |
| Bg. мир | + | + | | | |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map matka

Semasiological map for *matьka
R. матка • Blr. матка • Ukr. матка • Pol. matka • Ka. matka • USo. matka • Cz. matka • Slk. matka • Sln. Ø • Cr. Ø • Bo. Ø • Sb. Ø • Mk. матка • Bg. матка •
| *matьka | Meanings: ‘mother’ ‘womb, uterus’ ‘dam, female animal’ ‘nut (to screw on a bolt)’ ‘queen bee’ ‘mat’   no such word (For areas without shading there is no information yet.) |
| *matьka | Meanings | Meanings | Meanings | Meanings | Meanings | Meanings |
| *matьka | mother | womb, uterus | dam, female animal | nut (to screw on a bolt) | queen bee | mat |
| R. матка | | + | + | | + | |
| Blr. матка | + | + | | | | |
| Ukr. матка | + | + | + | | + | + |
| Pol. matka | + | | + | | | |
| Ka. matka | + | | | | | |
| USo. matka | | | | | + | |
| Cz. matka | + | | | + | + | |
| Slk. matka | + | | | + | | |
| Sln. Ø | | | | | | |
| Cr. Ø | | | | | | |
| Bo. Ø | | | | | | |
| Sb. Ø | | | | | | |
| Mk. матка | | + | | | | |
| Bg. матка | | + | | | | |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map meč

Semasiological map for [meč]
R. меч • Blr. меч • Ukr. меч • Pol. miecz(1), mecz(2) • Cz. meč • Slk. meč • Sln. meč • Cr. meč • Bo. meč • Sb. меч • Mk. меч • Bg. меч •
| [meč] | Meanings: ‘sword’ ‘match (sport event)’   no such word (For areas without shading there is no information yet.) |
| [meč] | Meanings | Meanings |
| [meč] | sword | match (sport event) |
| R. меч | + | |
| Blr. меч | + | |
| Ukr. меч | + | |
| Pol. miecz(1), mecz(2) | + | + |
| Cz. meč | + | |
| Slk. meč | + | |
| Sln. meč | + | |
| Cr. meč | | + |
| Bo. meč | | + |
| Sb. меч | | + |
| Mk. меч | + | + |
| Bg. меч | + | |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map modar

Semasiological map for *modrъ
R. Ø • Blr. Ø • Ukr. Ø • Pol. modry • Ka. mòdri • LSo. módry • USo. módry • Slk. modrý • Sln. moder • Cr. modar • Sb. модар • Mk. мудар • Bg. мъдър •
| *modrъ | Meanings: ‘light blue’ ‘dark blue (as a colour of face or body)’ ‘blue like cornflower’ ‘wise’   no such word (For areas without shading there is no information yet.) |
| *modrъ | Meanings | Meanings | Meanings |
| *modrъ | light blue | dark blue (as a colour of face or body) | blue like cornflower | wise |
| R. Ø | | | | |
| Blr. Ø | | | | |
| Ukr. Ø | | | | |
| Pol. modry | + | | + | |
| Ka. mòdri | + | | + | |
| LSo. módry | + | + | | |
| USo. módry | + | + | | |
| Slk. modrý | + | | | |
| Sln. moder | + | + | + | + |
| Cr. modar | + | + | | |
| Sb. модар | | + | | |
| Mk. мудар | | | | + |
| Bg. мъдър | | | | + |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map mork

Semasiological map for *morkъ
R. мрак • Blr. Ø • Ukr. морок • Pol. mrok • Ka. mark, mrok • LSo. mrok • Cz. mrak • Slk. mrak • Sln. mrak • Cr. mrak • Bo. mrak • Sb. мрак • Mk. мрак • Bg. мрак •
| *morkъ | Meanings: ‘darkness’ ‘dusk, twilight, dimness’ ‘cloud’   no such word (For areas without shading there is no information yet.) |
| *morkъ | Meanings | Meanings | Meanings |
| *morkъ | darkness | dusk, twilight, dimness | cloud |
| R. мрак | + | | |
| Blr. Ø | | | |
| Ukr. морок | + | + | |
| Pol. mrok | + | | |
| Ka. mark, mrok | + | | |
| LSo. mrok | | | + |
| Cz. mrak | | | + |
| Slk. mrak | | | + |
| Sln. mrak | | + | |
| Cr. mrak | + | | |
| Bo. mrak | + | | |
| Sb. мрак | + | | |
| Mk. мрак | + | | |
| Bg. мрак | + | | |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map mrdat

Semasiological map for mrdat
Pol. merdać • Cz. mrdat • Slk. mrdať • Sln. mrdati •
| mrdat | Meanings: ‘fuck’ ‘dandle’ ‘grin’ ‘wag’   no such word (For areas without shading there is no information yet.) |
| mrdat | Meanings | Meanings | Meanings |
| mrdat | fuck | dandle | grin | wag |
| Pol. merdać | | | | + |
| Cz. mrdat | + | | | |
| Slk. mrdať | + | | | |
| Sln. mrdati | | + | + | |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map majka

Semasiological map for [majka]
R. майка • Blr. майка(1), майткі(5) • Ukr. майка • Pol. majtki • Ka. Ø • LSo. majka • Cz. májka • Slk. Ø • Sln. Ø • Cr. majka • Bo. majka • Sb. мајка • Mk. мајка • Bg. майка •
| [majka] | Meanings: ‘gym shirt’ ‘mother’ ‘dam, female animal’ ‘nut (to screw on a bolt)’ ‘Underpants’ ‘girl’ ‘May pole’   no such word (For areas without shading there is no information yet.) |
| [majka] | Meanings | Meanings | Meanings | Meanings | Meanings | Meanings | Meanings |
| [majka] | gym shirt | mother | dam, female animal | nut (to screw on a bolt) | Underpants | girl | May pole |
| R. майка | + | | | | | | |
| Blr. майка(1), майткі(5) | + | | | | + | | |
| Ukr. майка | + | | | | | | |
| Pol. majtki | | | | | + | | |
| Ka. Ø | | | | | | | |
| LSo. majka | | | | | | + | |
| Cz. májka | | | | | | | + |
| Slk. Ø | | | | | | | |
| Sln. Ø | | | | | | | |
| Cr. majka | | + | | | | | |
| Bo. majka | | + | | | | | |
| Sb. мајка | | + | | | | | |
| Mk. мајка | | + | + | | | | |
| Bg. майка | | + | + | + | | | |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map muzh

Semasiological map for *mǫžь
R. муж • Blr. муж • Ukr. муж • Pol. mąż • Ka. mąż • LSo. muž • USo. muž • Cz. muž • Slk. muž • Sln. mož • Cr. muž • Bo. muž • Sb. муж • Mk. маж • Bg. мъж •
| *mǫžь | Meanings: ‘man’ ‘husband’ ‘adult man’   no such word (For areas without shading there is no information yet.) |
| *mǫžь | Meanings | Meanings | Meanings |
| *mǫžь | man | husband | adult man |
| R. муж | | + | |
| Blr. муж | | + | |
| Ukr. муж | + | | |
| Pol. mąż | | + | |
| Ka. mąż | | + | |
| LSo. muž | + | + | |
| USo. muž | + | + | |
| Cz. muž | + | + | |
| Slk. muž | + | + | |
| Sln. mož | | + | + |
| Cr. muž | | + | |
| Bo. muž | | + | |
| Sb. муж | | + | |
| Mk. маж | + | + | |
| Bg. мъж | + | + | |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# False Friends of the Slavist/Map město

Semasiological map for *město
R. место • Blr. места • Ukr. місто • Pol. miasto • Cz. město(1), místo(2) • Slk. mesto(1), miesto(2) • Sln. mesto • Cr. mjesto • Bo. mjesto • Sb. mesto • Mk. место • Bg. място •
| *město | Meanings: ‘city’ ‘town’ ‘place’   no such word (For areas without shading there is no information yet.) |
| *město | Meanings | Meanings |
| *město | city | town | place |
| R. место | | | + |
| Blr. места | | + | |
| Ukr. місто | + | + | |
| Pol. miasto | + | + | |
| Cz. město(1), místo(2) | + | + | + |
| Slk. mesto(1), miesto(2) | + | + | + |
| Sln. mesto | + | + | |
| Cr. mjesto | | | + |
| Bo. mjesto | | | + |
| Sb. mesto | | | + |
| Mk. место | | | + |
| Bg. място | | | + |
| < Index of semasiological maps | < False Friends of the Slavist Homepage |
# Two Knights Defence:Morphy Variation

8. Qe2

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7. Nf3 e4
| 8 | 9 | 10 |
| Qe2 Nxc4 | dxc4 Bc5 | Nfd2 O-O |

## Statistics

Estimated next move popularity Nxc4 95%, Bb4+ 5%
When contributing to this Wikibook, please follow the Conventions for organization.
# Two Knights Defence:Morphy Variation
## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. cxd4 Bc5 10. Nfd2 O-O
| | 10 | 11 |
| 1 | Nb3 Bg4 | Qf1 Bb4+ |
When contributing to this Wikibook, please follow the Conventions for organization.

## References

* This Chess related article is a stub. Please assist Wikibooks by expanding it.
# Two Knights Defence: Kloss Gambit
### 5...Nb4!?

A rarely seen gambit, named the Kloss Gambit. The point of 5...Nb4 is to attack the d5 pawn which is now is attacked twice and is only defended once. However, this move sacrifices a pawn for no clear compensation. This very crazy gambit can either lead to a bad position for black or sheer madness and craziness where sacrifices are everywhere and the moves are near unexplainable by an average chess player. Maybe a trick is involved in this interesting, unknown gambit?

## 6. c3 line

With white's sixth move c3, white attacks black's knight but leaves the pawn on d5 undefended and free to take.
These are some ways the game can go:
* 6...Nbxd5 7. d3 c6 8. O-O Bd6 9. Ne4 Bc7 10. Bg5 h6 11. Nxf6+ gxf6 12. Bh4
* 6... b5 7. Bxb5+ c6 8. dxc6 Nd3+ 9. Bxd3 Qxd3 10. Qf3 Bf5 11. a4 h6 12. Qxd3 Bxd3
* 6... h6 7. Nxf7 Kxf7 8. cxb4 Bxb4 9. O-O Bd6 10. d4 e4 11. f3 exf3 12. Qxf3 Rf8

## 6. d6 line

With white's sixth move d6, white renews the threat on f7 and moves away from the attack of the Nb4.
The game can continue with:
* 6...Nbd5 7. dxc7 Qxc7 8. Bb5+ Bd7 9. Bxd7+ Qxd7 10. O-O h6 11. Nf3 e4 12. Ne5 Qc7
* 6... Nfd5 7. d4 Qxd6 8. a3 Nc6 9. O-O Be6 10. Nxe6 fxe6 11. dxe5 Qd7 12. Qh5+ g6
* 6... Bg4 7. Bxf7+ Kd7 8. f3 h6 9. fxg4 hxg5 10. a3 Nc6 11. d3 cxd6 12. Bxg5 Qb6

## 6. O-O line

With white's sixth move O-O, white chooses to ignore the Nb4 and play normally.
There are a couple of ways the game can go:
* 6...h6 7. Nf3 e4 8. Re1 Be7 9. Ne5 O-O 10. Nc3 c6 11. dxc6 Qd4 12. Ng6 Bc5
* 6... Bg4 7. f3 Bh5 8. Re1 Be7 9. Rxe5 O-O 10. Nc3 Nd7 11. Ne6 Bxf3 12. gxf3 fxe6
* 6... Nbxd5 7. Re1 Be7 8. Rxe5 O-O 9. Nf3 h6 10. d4 c5 11. Bb3 Nb6 12. Na3 a5

## 6. d4 line

With white's sixth move d4, white chooses to attack the center and try to get a clear position without wild sacrifices flying everywhere. Will it end up to be a clear and typical gambit position or a crazy up and down unclear, extremely irregular position with minor piece sacrifices floating in the middle of the board like most of the other lines we saw? Let's find out!
The game can go like this:
* 6...Bd6 7. O-O O-O 8. dxe5 Bxe5 9. Nf3 Bg4 10. Be2 Bxf3 11. Bxf3 Nbxd5 12. g3 c6
* 6... exd4 7. O-O Nbxd5 8. Qxd4 Be7 9. Nc3 c6 10. Nxd5 cxd5 11. Bd3 O-O 12. Bf4 Bd7
* 6... Bg4 7. f3 Bf5 8. O-O h6 9. Nxf7 Kxf7 10. dxe5 Nfxd5 11. Nc3 c6 12. Ne4 a5
1.e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nb4!?
# Two Knights Defence:Morphy Variation

7. Nf3

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6
| 7 | 8 | 9 | 10 |
| Nf3 e4 | Qe2 Nc4 | dxc4 Bc5 | Nfd2 O-O |

## Statistics

Estimated next move popularity e4 73%, Nxc4 11%, Bd6 11%, Bg4 5%
When contributing to this Wikibook, please follow the Conventions for organization.
# Two Knights Defence:Morphy Variation

8... Nxc4

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7. Nf3 e4 8. Qe2 Nxc4
| 9 | 10 |
| dxc4 Bc5 | Nfd2 O-O |

## Statistics

Estimated next move popularity dxc4 100%
When contributing to this Wikibook, please follow the Conventions for organization.
# Two Knights Defence:Morphy Variation

9. dxc4 Recaptures the piece.

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. cxd4
| 9 | 10 |
| dxc4 Bc5 | Nfd2 O-O |

## Statistics

Estimated next move likelihood Bc5 65%, Bd6 21%, Be7 14%
When contributing to this Wikibook, please follow the Conventions for organization.
# Two Knights Defence:Morphy Variation

9... Bc5

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. dxc4 Bc5
| | 10 | 11 |
| 1 | Nfd2 O-O | Nb3 Bg4 |
| 2 | h3 O-O | Nh2 e3 |
| 3 | Bf4 O-O | Nfd2 Bg4 |

## Statistics

Estimated next move likelihood Nfd2 48%, h3 48%, Bf4 4%
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# Two Knights Defence:Morphy Variation

6...h6

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6
| 7 | 8 | 9 | 10 |
| Nf3 e4 | Qe2 Nxc4 | dxc4 Bc5 | Nfd2 O-O |

### Statistics

Estimated next move popularity Nf3 55% Nh3 45%
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# Two Knights Defence:Morphy Variation

7... e4

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7. Nf3 e4
| 8 | 9 | 10 |
| Qe2 Nc4 | dxc4 Bc5 | Nfd2 O-O |

### Statistics

Estimated next move popularity Qe2 75%, dxe4 20%, Nd4 5%
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# Two Knights Defence:Morphy Variation

10. Nfd2

## Theory table

For explanation of theory tables, see theory table and for notation, see algebraic notation. .
    1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. cxd4 Bc5
| | 10 | 11 |
| 1 | Nfd2 O-O | Nb3 Bg4 |
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# Field Guide/Birds/Dumetella carolinensis

Dumetella carolinensis (Gray Catbird) :
* Gray Catbird
* Description |
* The Gray Catbird is a medium-sized perching bird.
* Adults are dark gray with a slim, black bill and dark eyes. They have a long dark tail, dark legs and a dark cap; they are rust-colored underneath their tail.
* Their breeding habitat is semi-open areas with dense, low growth across most of North America. They are found in urban, suburban, and rural habitats. They build a bulky cup nest in a shrub or tree, close to the ground. Eggs are light blue in color, and clutch size ranges from 1-5, with 2-3 eggs most common. Both parents take turns feeding the young birds.
* They migrate to the southeastern United States, Mexico and Central America.
* These birds forage on the ground in leaf litter, and love freshly worked earth. Some may even visit a freshly turned garden while the gardener is still present. They mainly eat insects and berries.
* In the United States, this species receives special legal protections under the Migratory Bird Treaty Act of 1918.
* The catbird is named for its cat-like call, but it also mimics the songs of other birds. A catbird's song is easily distinguished from that of the Northern Mockingbird or Brown Thrasher because the mockingbird repeats phrases 3-4 times, and the brown thrasher usually repeats each phrase twice, whereas the catbird sings each phrase only once. The catbird's song is usually described as more raspy and less musical than a mockingbird.
* The catbird produces a variety of calls, including the familiar ones resembling a cat's meow, as well as an alarm call which resembles the quiet quacking of a male mallard.
* In contrast to many songbirds which choose a prominent perch from which to sing, the catbird often chooses to sing from inside a bush or small tree, where they are obscured from view by the foliage.
* The syrinx of gray catbirds has an unusual structure that not only allows them to make mewing sounds like that of a cat but also allows them to imitate other birds, tree frogs, and even mechanical sounds that they hear. Their unusual syrinx also allows them to sing in two voices at once.
* Gray catbirds are not afraid of predators and respond to them aggressively to them by flashing their wings and tails and by making their signature mew sounds. They are also known to even attack and peck predators that come too near their nests. |