readme.md

About the attacks/ directory

Purpose

attacks/ contains occupancy-aware attack queries.

This layer starts from a current position or an occupied bitboard and answers questions such as:

• what squares does this slider attack?
• which enemy pieces are currently checking the king?
• which squares are attacked by one side in the current position?

Place in the architecture

flowchart TD
    Other("`...`")
    TopLevelHeaders("`
        **Top Level Headers**
        -
        inlcude/bitbishop/*.hpp
    `")
    LookupTables("`
        **Lookup Tables**
        Compile-time geometry and precomputed tables
        -
        inlcude/bitbishop/lookups/*.hpp
    `")
    Attacks("`
        **Attacks**
        Occupancy-aware attack queries
        -
        inlcude/bitbishop/attacks/*.hpp
    `")
    MoveGen("`
        **Move Generation**
        Legal move generation and king safety
        -
        inlcude/bitbishop/movegen/*.hpp
    `")

    LookupTables --> TopLevelHeaders

    Attacks --> LookupTables

    MoveGen --> Attacks
    MoveGen --> LookupTables
    Other --> MoveGen

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Responsibilities

• Combine geometric patterns with runtime occupancy
• Compute exact slider attacks in the current position
• Detect checking pieces and aggregate attacked squares
• Provide precise attack information to the rules layer

Inputs

• Immutable geometry from lookups/
• Runtime occupancy from Board
• Core types such as Bitboard, Square, and Color

Outputs

• Exact attack bitboards for sliding pieces
• Checker sets and attacked-square maps
• Occupancy-aware answers consumed by movegen/