OpenLLM-France/wikimedia huggingface dataset:
# C++ Language/Std/Stl/CallableObjects/MemberFunction

A callable-object could also be assigned to a C++ member function: std::function<int(const CRType*,int,int)> DoMath = &CRType::DoAddition; Now, invocation requires both parameters and a this pointer (an address of some pre-existing target-object): DoMath(&oTargetObject, 11, 22).
Additional information about a member function being a callable-object (includes interactive examples)
# C++ Language/Std/Stl/CallableObjects/BindingNewFunction

One callable-object can be transformed into another (unnamed) callable-object by "binding" it using std::bind.
Additional information about binding a function (includes interactive examples)
# C++ Language/Std/Stl/CallableObjects/Functor

A "functor" is any object defined to have a custom overload implementation of the function-call-operator (operator). A functor object can be assigned to any callable-object whose signature matches.
Additional information about functors (includes interactive examples)
# C++ Language/Std/Stl/CallableObjects/GenericLambda

A lambda can be written in a generic way, by using auto for its parameter type.
Additional information about generic lambdas (includes interactive examples)
# C++ Language/Std/Stl/CallableObjects/ImplicitGetterFunction

For every data member in a class, there is an implicit getter-function (even if the programmer didn't explicitly define that as a member function): std::function<int(const CRType*)> GetMember = &CRType::m_iMember;
Additional information about implicit getter-functions (includes interactive examples)
# C++ Language/Std/Stl/CallableObjects/FunctionNameAsValue

The most simple form of a callable-object is the name of some existing function. If your software has already defined int DoAddition(int x, int y) {return x+y;}, then you might choose to define a callable-object as std::function<int(int,int)> DoMath = DoAddition;. In this case, the callable-object (DoMath) is a variable that can be manipulated like any other C++ variable. But the special thing about a callable-object is that it can be "invoked", either by a function-call-operator DoMath(11,22) or by std::invoke(DoMath, 11, 22).
Additional information about using a function name as a value (includes interactive examples)
# C++ Language/Std/Stl/CollectionClasses/SequenceCollections/Deque

A "deque" (an instance of class std::deque<>) has an array-of-values that can dynamically-resize in either direction. Unlike a vector, a deque's internal implementation does not store items in contiguous memory (so there is no "capacity"). Because a deque can grow in either direction, you can call push_front in addition to push_back.
Additional information about deque (includes interactive examples)
# Canadian Business Law

This text is intended to provide a survey of the relevant principles and case law surrounding the law of evidence in Canada.

## Introduction

* Introduction

## Non-Corporate Business entities

* Sole Proprietorship
* Partnerships
** General Partnerships
** Limited Partnerships
** Limited Liability Partnerships
* Joint Ventures

## The Corporation

* Corporations
** Process of incorporation
* Corporate Liability
** Piercing the Veil
* Corporate Finance
** Securities
** Shares
** Debt
* Corporate Governance
** Duties of Management
# Cambridge O Level Mathematics (Syllabus D)

Welcome to the Cambridge O Level Mathematics (Syllabus D) (4024) study guide. There are a total of 39 topics to be covered in this syllabus. This syllabus is assessed by two components: Paper 1 (non-calculator paper) (80 marks weighed at 50% of total) and Paper 2 (calculator paper) (100 marks weighed at 50% of total). Paper 1 consists of approximately 25 short-answer questions. Paper 2 consists of two sections: Section A (52 marks) consisting of six compulsory structured questions, and Section B (48 marks) where four of the five structured questions must be answered. This syllabus is available for examination in both the May/June and the October/November examination series.
Syllabus details can be found here: http://www.cie.org.uk/qualifications/academic/middlesec/olevel/subject?assdef_id=925

## Table of Contents

* Topic 1: Number
* Topic 2: Set Language and Notation
* Topic 3: Function Notation
* Topic 4: Squares, Square Roots, Cubes, Cube Roots
* Topic 5: Directed Numbers
* Topic 6: Vulgar and Decimal Fractions and Percentages
* Topic 7: Ordering
* Topic 8: Standard Form
* Topic 9: The Four Operations
* Topic 10: Estimation
* Topic 11: Limits of Accuracy
* Topic 12: Ratio, Proportion, Rate
* Topic 13: Percentages
* Topic 14: Use of an Electronic Calculator
* Topic 15: Measures
* Topic 16: Time
* Topic 17: Money
* Topic 18: Personal and Household Finance
* Topic 19: Graphs in Practical Situations
* Topic 20: Graphs of Functions
* Topic 21: Straight Line Graphs
* Topic 22: Algebraic Representation and Formulae
* Topic 23: Algebraic Manipulation
* Topic 24: Indices
* Topic 25: Solutions of Equations and Inequalities
* Topic 26: Graphical Representation of Inequalities
* Topic 27: Geometrical Terms and Relationships
* Topic 28: Geometrical Constructions
* Topic 29: Bearings
* Topic 30: Symmetry
* Topic 31: Angle
* Topic 32: Locus
* Topic 33: Mensuration
* Topic 34: Trigonometry
* Topic 35: Statistics
* Topic 36: Probability
* Topic 37: Matrices
* Topic 38: Transformations
* Topic 39: Vectors in Two Dimensions
# Canadian Business Law/Corporations
## The Corporation

A corporation enjoys special status in the law. Among the characteristics of the corporation include:
* exists as a separate legal entity
* existence is perpetual
* has limited liability
* control by shareholders
* shares are transferable

## Process of incorporation

There are three ways in which to incorporate a company in Canada.

### Letters Patent

    A grant of a Charter from the Crown. This practice is only still used in PEI.

### Memorandum of Association

    The rights and obligations of the corporation are determined contractually by the Articles of Association. This practice is only used in Nova Scotia and British Columbia.

### Statutory enactment

    The corporation is enacted under a Corporations Act, which can either be federal or provincial.
# Ancient History/Byzantium
## Introduction

The "Byzantine Empire"
# Ancient History/Ancient Near East/Mesopotamia/Assyria

Assyria in earliest historical times referred to a region on the Upper Tigris river, named for its original capital, the ancient city of Assur. Later, as a nation and Empire, it also came to include roughly the northern half of Mesopotamia.
The Assyrian kings controlled a large kingdom at three different times in history. These are called the Old, Middle, and Neo-Assyrian kingdoms, or periods. The most powerful and best-known nation of these periods is the Neo-Assyrian kingdom, 911-612 BC.
# Ancient History/Biographical Dictionary

WIthin this biographical dictionary, persons are listed in alphabetical order, followed by a link to the relevant Wikipedia page, followed by their nationality and profession. Each entry concludes with a one or two line summary of their contributions.

# A

Aristotle (wp) Early 3rd century BC. Greek philosopher and scientist, student of Plato and teacher of Alexander the Great.

# C

Julius Caesar: (wp) 100-44 BC. Roman statesman and general, conqueror of Gaul (55-49 BC) and dictator perpetuus of the Roman Republic from 48 BC to his assassination in 44 BC.
Bartolome de las Casas (wp) early 16th century AD Spanish Franciscan, a proponent of native rights during the early stages of the conquest of Central and South America.
Cleopatra-Was one of the riches women in ancient Egypt.

# H

Herodotus: (wp) 4th cent BC. Greek Historian, known for his inquiries into the histories of Egypt, Persia, and Greece.

# K

Khafre: (wp) 26th century BC. Egyptian pharaoh who built the second largest pyramid at Giza and the Great Sphinx.
Khufu: (wp) 26th century BC. Egyptian pharaoh who built the Great Pyramid of Giza, the largest pyramid in Egypt and the only one of the Seven Wonders of the Ancient World that survives.

# L

Leonidas (wp). late 5th/early 4th century BC. Greek monarch. Spartan king and commander at the battle of Thermopylae, 480 BC.

# R

Walter Raleigh (wp) 15th-16th cent. AD English knight and naval explorer involved in the settlement and exploitation of the Americas.

# S

King Scorpion (wp) 33rd century BC. Dynasty 0 Egyptian pharaoh, whose tomb shows the first signs of Pharaonic culture and the earliest known example of a writing system.
Sima Qian (wp) c. 140- c.90 b.c., under the reign of the Han emperor Wudi. Sima Qian is the most influential and recognizable historians in all of Chinese history, if not the world. He composed a 130-chapter, 500,000+ character history of China up until the time at which he lived. During the beginning of his history, to which he devoted most of his life, he happened to offend the Emperor Wudi by defending a general who had displeased him. For this offence, he was castrated, a punishment which was typically followed up by the sufferer's willing suicide. But Sima Qian decided that the completion of his history, for the betterment of China, was more important than his own life, even if he had to live in shame. When it was finished, it was known as "The Records of the Grand Historian," for the position he held in the Han court.
Sneferu: (wp) Late 27th century–26th centuries BC. Egyptian pharaoh who constructed three pyramids at Dashur; the third pyramid—the Red Pyramid—became the first true pyramid to be completed.
# Ancient History/Ancient Near East/Mesopotamia

* Introduction - Mesopotamia
* Mesopotamia is an ancient Greek word meaning "land between the rivers". Between 5000 BCE and 500 BCE, it was home to successive waves of cultures, borrowing and cooperating with one another for resources, ideas and culture, as well as competing with one another militarily for land and prestige.
* Section 1 - Background
* Here is some background information useful for any study into Mesopotamia.
* Introduction
* Geography
* Section 2 - First Civilizations
* Near the confluence of the Tigris and Euphrates rivers on the Persian Gulf is a marshy, low-lying region that in ancient times was the home of the first cities — the land of Sumer. Here, the city-states of Ur, Uruk and others competed for land, power, and prestige while trying to fend off barbarians. These cities became the ancient Greece of the region — providing written language, architecture, religion, and cultural norms to the societies that followed.
* Old Babylonian Period
* Sumer & the First Cities
* The Akkadian Empire
* Ebla
* The Lullubi
* The Guti
* The Sumerian Renaissance
* Section 3 - The Amorites and Babylon
* Babylon was the first city-state to assemble a true kingdom around itself in Mesopotamia. Located at a point not far from modern-day Baghdad, the Babylonians used the river for communication and control in a wide empire that spread across the river valleys.
* The Amorites
* The Babylonian Empire
* The Kassites
* Section 4 - Upper Mesopotamia
* Assyria was named after its first capital, Assur, and referred to an area of Northern Mesopotamia, as opposed to the Southern Mesopotamia of Sumer, Akkad and Babylonia.
* Assyria
* The Hurrians and the Mitanni Empire
* Section 5 - The Neo-Assyrian Empire
* Assyria believed in military domination of its enemies. The kings of Assyria conquered lands from the Hittites, Egyptians, and Medes, as well as all the minor kingdoms between. They rate negative attention in sources as widely spread as the Bible and Hittite archives for their cruelty and villainy.
* Section 6 - The Neo-Babylonian Empire (Chaldea)
* Insert summary here.
<<Return to Ancient History table of contents
# Ancient History/Ancient Near East/Mesopotamia/Babylonian Empire

* Nimrod
* Old Babylonian period
* Kassite period
* Neo-Babylonian Empire
# Ancient History/Ancient Near East/Mesopotamia/Akkadian Empire

Akkad was a city that came to dominate the region of northern Mesopotamia, situated on the west bank of the Euphrates. It reached the height of its power between the 24th and 22nd centuries BC, before the rise of Babylonia. The Akkadians were recognized as gifted warriors for their time, this reputation was probably attained for the Akkadians after the numerous conquests launched by King Sargon, who built the world's first empire.
# Ancient History/China

* Introduction
* Xia
* Shang
* Zhou
** Spring and Autumn Period
** Warring States Period
* Qin Dynasty
* Han Dynasty
** Western Han Dynasty
** Xin Dynasty
** Eastern Han Dynasty
* Three Kingdoms Period
* Jin Dynasty
* Southern and Northern Dynasties
# Chess/Puzzles/Directmates/Two-move 7

Starting from the following position, white starts and wins.
| | a | b | c | d | e | f | g | h | |
| 8 | | | | | | | | | 8 |
| 7 | | | | | | | | | 7 |
| 6 | | | | | | | | | 6 |
| 5 | | | | | | | | | 5 |
| 4 | | | | | | | | | 4 |
| 3 | | | | | | | | | 3 |
| 2 | | | | | | | | | 2 |
| 1 | | | | | | | | | 1 |
| | a | b | c | d | e | f | g | h | |
Author: L. Kubbel
Solution
# Chess/Puzzles/Directmates/Two-move 4/Solution

It is quite simple to show that the only move black could have made to reach this position was b7-b5. Thus, a5 can take b5 en passant.
1.a5xb6 a3
2.b7#
| | a | b | c | d | e | f | g | h | |
| 8 | | | | | | | | | 8 |
| 7 | | | | | | | | | 7 |
| 6 | | | | | | | | | 6 |
| 5 | | | | | | | | | 5 |
| 4 | | | | | | | | | 4 |
| 3 | | | | | | | | | 3 |
| 2 | | | | | | | | | 2 |
| 1 | | | | | | | | | 1 |
| | a | b | c | d | e | f | g | h | |
# Chess/Puzzles/Endgame/Puzzle 1/Solution

1.Kg7! h4 (or 1...Kb6 Kf6 2.Kxc6 Kg5)
2.Kf6! Kb6
2... h3 leads to 3.Ke6 h2 4.c7 Kb7 5.Kd7 and White draws.
3.Ke5 Kxc6
3... h3 leads to 4.Kd6 h2 5.c7 and White draws.
4.Kf4 h3
5.Kg3 h2
6.Kxh2
| | a | b | c | d | e | f | g | h | |
| 8 | | | | | | | | | 8 |
| 7 | | | | | | | | | 7 |
| 6 | | | | | | | | | 6 |
| 5 | | | | | | | | | 5 |
| 4 | | | | | | | | | 4 |
| 3 | | | | | | | | | 3 |
| 2 | | | | | | | | | 2 |
| 1 | | | | | | | | | 1 |
| | a | b | c | d | e | f | g | h | |
This classic study is an excellent illustration of the fact that the King can take many alternative routes to the same square, each of which use the same amount of tempi. By moving to the center of the board while still chasing the Black pawn, White is able to create a promotion threat of his own. If Black ignores this threat, both pawns will queen and the ending will be drawn, but if Black spends moves with his king to stop the white c-pawn, White's king will be able to catch the h-pawn.
# Chess/Puzzles/Directmates/Two-move 6/Solution

1. Qd6!
If 1... b4 then 2.Qa6#
If 1... Ka4 then 2.Qa3#
| | a | b | c | d | e | f | g | h | |
| 8 | | | | | | | | | 8 |
| 7 | | | | | | | | | 7 |
| 6 | | | | | | | | | 6 |
| 5 | | | | | | | | | 5 |
| 4 | | | | | | | | | 4 |
| 3 | | | | | | | | | 3 |
| 2 | | | | | | | | | 2 |
| 1 | | | | | | | | | 1 |
| | a | b | c | d | e | f | g | h | |
# Chess/Puzzles/Directmates/Two-move 7/Solution

1. Bb3 (threatens Ne6#)
1... Kf4 2. Qc4#
1... f4 2. Nf5#
1... Nf4 2.Rg3#
1... Bf4 2.Bc1#
1... Rxh5 2.Nxh5#
1... Be5 2. Qxf5#
1... Ne5 2. Qxf5#
# Chess/Puzzles/Endgame
## Puzzles

* Puzzle by R. Reti
* Puzzle by M. Tal and E. Pogosyants
# Chess/Puzzles/Endgame/Puzzle 1

White to play and draw.
| | a | b | c | d | e | f | g | h | |
| 8 | | | | | | | | | 8 |
| 7 | | | | | | | | | 7 |
| 6 | | | | | | | | | 6 |
| 5 | | | | | | | | | 5 |
| 4 | | | | | | | | | 4 |
| 3 | | | | | | | | | 3 |
| 2 | | | | | | | | | 2 |
| 1 | | | | | | | | | 1 |
| | a | b | c | d | e | f | g | h | |
Authored by R. Reti.
Solution
# Chess/Puzzles/Directmates/Two-move 5

Starting from the following position, white starts and wins in two moves.
| | a | b | c | d | e | f | g | h | |
| 8 | | | | | | | | | 8 |
| 7 | | | | | | | | | 7 |
| 6 | | | | | | | | | 6 |
| 5 | | | | | | | | | 5 |
| 4 | | | | | | | | | 4 |
| 3 | | | | | | | | | 3 |
| 2 | | | | | | | | | 2 |
| 1 | | | | | | | | | 1 |
| | a | b | c | d | e | f | g | h | |
Authored by A. Shulyakov.
Solution
# Chess/Puzzles/Directmates/Two-move 5/Solution

1. Qd2!
If 1... Kh4 then 2. Qg5#
If 1... Kg4 then 2. Qf4#
If 1... Kf3 then 2. Qf4# or 2. Qg2#
If 1... Bg4 then 2. Qf2#
If black moves the bishop anywhere else then 2. Qf4#
| | a | b | c | d | e | f | g | h | |
| 8 | | | | | | | | | 8 |
| 7 | | | | | | | | | 7 |
| 6 | | | | | | | | | 6 |
| 5 | | | | | | | | | 5 |
| 4 | | | | | | | | | 4 |
| 3 | | | | | | | | | 3 |
| 2 | | | | | | | | | 2 |
| 1 | | | | | | | | | 1 |
| | a | b | c | d | e | f | g | h | |
# Chess/Puzzles/Directmates/Two-move 6

Starting from the following position, white starts and wins in two moves.
| | a | b | c | d | e | f | g | h | |
| 8 | | | | | | | | | 8 |
| 7 | | | | | | | | | 7 |
| 6 | | | | | | | | | 6 |
| 5 | | | | | | | | | 5 |
| 4 | | | | | | | | | 4 |
| 3 | | | | | | | | | 3 |
| 2 | | | | | | | | | 2 |
| 1 | | | | | | | | | 1 |
| | a | b | c | d | e | f | g | h | |
Authored by V. Lashmanov.
Solution
# Traxler Counterattack
### 5. Bxf7+

    The preferred move for most modern masters, preferring to capture the pawn and keep the position comparatively calm. This move is considered the best way to maintain an edge.

## 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 Bc5 5. Bxf7+
| 5 | 6 | 7 | 8 | 9 |
| Bxf7 Ke7 | Bd5 Rf8 | O-O d6 | +/= |
| Bxf7 Kf8 | Bb3 Qe8 | Nc3 d6 | +/= |
When contributing to this Wikibook, please follow the Conventions for organization.

## References

Two Knights Defence - Traxler newinchess.com
# Traxler Counterattack
### 4. ...Bc5

    The move that signifies the Traxler Counterattack or sometimes known as the Wilkes-Barre Variation. This can quickly lead to mate with the queen.
    This bold move ignores White's attack on f7 and can lead to wild play as Black can try a bishop sacrifice on f2 if White plays Nxf7. Instead, White will often prefer Bxf7+.

## 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 Bc5
| | 4 | 5 | 6 | 7 | 8 |
| 1 | ... Bc5 | Bxf7+! Ke7 | Bd5 Rf8 | O-O d6 | +/= |
| 2 | ... ... | Nxf7 Bxf2+ | Kxf2 Nxe4+ | Kg1 Qh4 | g3 Nxg3 | ∞ |
| 3 | ... ... | d4 d5 | Bxd5 Nxd4 | Bxf7+ Ke7 |

## Statistics

Estimated next move popularity Bxf7+ 53.5%, Nxf7 39.5%, d4 7%
When contributing to this Wikibook, please follow the Conventions for organization.

## References

* Kasparov, Garry, & Keene, Raymond 1989 Batsford chess openings 2. ISBN 0-8050-3409-9.
# Traxler Counterattack
### 5... Ke7

    The king has only two squares, and as Kf8 blocks in the rook, Ke7 is usually played.

## 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 Bc5 5. Bxf7+ Ke7
| | 6 | 7 | 8 |
| 1 | Bb3 Rf8 | O-O h6 | - |
| 2 | Bd5 Rf8 | O-O d6 | |
When contributing to this Wikibook, please follow the Conventions for organization.
# Traxler Counterattack

7... dxc6. Taking with the queens pawn continues in Black's effort to maintain an active position, now the Black Queen is free to move on the d-file especially to the square d4 if required.

## 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 Bc5 5. Bxf7+ Ke7 6. Bd5 Rf8 7. Bxc6 dxc6
| | 8 | 9 | 10 | 11 |
| 1 | d3 Ng4 | Nh3 Nxf2 | Bg5+ Kd7 | Qe2 Qe8 | =/+ |
| 2 | Qe2 Ng4 | f3 Nf6 | = |
| 3 | Nf3 - |
When contributing to this Wikibook, please follow the Conventions for organization.
# Two Knights Defence
### 4. Ng5!?

This move is interesting. While some in the past considered it ridiculous, others point out that White wins a pawn in the process.
The White Knight now threatens a fork with Nxf7, yet to do so it's broken a rule of opening development in that the same piece moves twice; if Black plays correctly then White will seriously fall behind in development. Black's only sensible way to defend f7 is to block the bishop's access with 4...d5, but the pawn on d5 itself is not fully defensible by Black.
Black has two sensible replies.
   * 4...d5 The best way for Black to defend is to play d5, blocking the bishop from the weak f7 square.
   * 4...Bc5 Ignoring the threat, a risky option is the Traxler Attack. Black can try a bishop sacrifice on f2 if White plays Nxf7. Instead, White will often prefer Bxf7+.
Additionally, black may choose to move the knight on f6. This opens up an attack on the white g5 knight. There are two sensible methods of achieving this:
   * 4...Nxe4.
   * 4...Nd5.

## 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
| | | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Two Knights Defence | 1 | Ng5 Bc5!? | Bxf7+ Ke7 | Bd5 Rf8 | O-O d6 | c3 Bg4 | Qb3 Bb6 | Bxc6 bxc6 | +/= |
| | 2 | ... d5 | exd5 Nxd5!? | d4 Bb4+ | c3 Be7 | Nxf7 Kxf7 | Qf3+ Ke6 | Qe4 Rf8 | +/= |
| | 3 | ... ... | ... ... | Nxf7!? Kxf7 | Qf3+ Ke6 | Nc3 Ncb4 | a3 Nxc2+ | Kd1 Nxa1 | ∞ |
| | 4 | ... ... | ... Na5 | d3 h6 | Nf3 e4 | Qe2 Nxc4 | dxc4 Bc5 | Nfd2 O-O | = |
| | 5 | ... ... | ... ... | Bb5+ c6 | dxc6 bxc6 | Be2 h6 | Nf3 e4 | Ne5 Bc5 | ∞ |
| | 6 | ... ... | ... ... | ... ... | ... ... | ... ... | Nh3 Bd6 | d3 O-O | ∞ |
| | 7 | ... ... | ... ... | ... ... | ... ... | Qf3 Be7 | Bxc6+ Nxc6 | Qxc6+ Bd7 | ∞ |
| | 8 | ... ... | ... b5 | Bf1 h6 | Nxf7 Kxf7 | dxc6 Qd5 | Qf3 Qc5 | b4 Qxb4 | ∞ |
| | 9 | ... ... | ... Nd4 | c3 b5 | Bf1 Nxd5 | Ne4 Qh4 | Ng3 Bg4 | f3 e4 | |
| | 10 | ... Nxe4?! | Bxf7+! Ke7 | d4 d5 | Nc3 | | | | += |
| | 11 | ... Nd5 | d3 | | | | | | += |

## Statistics

Estimated next move popularity d5 80%, Bc5 19%, Others less than 1%
When contributing to this Wikibook, please follow the Conventions for organization.

## References

* Kasparov, Garry, & Keene, Raymond 1989 Batsford chess openings 2. ISBN 0-8050-3409-9.
* Nunn's Chess Openings. 1999. John Nunn (Editor), Graham Burgess, John Emms, Joe Gallagher. ISBN 1-8574-4221-0.
# Traxler Counterattack
### 6.Bd5

    Bd5 is often given an exclamation mark by theory books. This precise move gives rise to the possibility of a future Bxc6 and overprotects the e4-pawn.

## 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 Bc5 5. Bxf7+ Ke7 6. Bd5
| | 6 | 7 | 8 | 9 | 10 | 11 |
| 1 | Bd5 Rf8 | Bxc6 dxc6 | d3 Ng4 | Nh3 Nxf2 | Bg5+ Kd7 | Qe2 Qe8 | ∞/+ |
| 2 | ... d6 | |
| 3 | ... Qe8 | |
| 4 | ... Qf8 | |
When contributing to this Wikibook, please follow the Conventions for organization.
# Traxler Counterattack

8. d3
While this is currently a theory move, it appears to be a mistake. White has difficulty to maintain an edge in this line. So perhaps appropriate is 8. d3?!

## 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 Bc5 5. Bxf7+ Ke7 6. Bd5 Rf8 7. Bxc6 dxc6
| | 8 | 9 | 10 |
| 1 | d3 Ng4 | Nh3 Nxf2 | Bg5+ Kd7 | Qe2 Qe8 |
When contributing to this Wikibook, please follow the Conventions for organization.
# Traxler Counterattack

6 .. Rf8. This rook developing move threatens to win the f2 pawn by Bxf2+, Kxf2 and Nxd5+ discovered check.

## 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 Bc5 5. Bxf7+ Ke7 6. Bd5 Rf8
| | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 1 | O-O d6 | c3 Bg4 | Qb3 Bb6 | Bxc6 bxc6 | h3 h6 | hxg4 hxg5 | d4 Qd7 | Qd1 Qxg4 | = |
| 2 | Nf3 Nd4 | Nxd4 Bxd4 | O-O c6 | c3 Bb6 | Bb3 Nxe4 | = |
| 3 | Bxc6 dxc6 | d3 Ng4 | Nh3 Nxf2 | Bg5+ Kd7 | Qe2 Qe8 | ∞/= |
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# Traxler Counterattack

7 . Bxc6. The latest theory move. The purpose of this move is to allow d3 to be played without the requirement to castle.

## 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 Bc5 5. Bxf7+ Ke7 6. Bd5 Rf8
| | 7 | 8 | 9 | 10 |
| 1 | Bxc6 dxc6 | d3 Ng4 | Nh3 Nxf2 | Bg5+ Kd7 |
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