Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { EngineErrorCode,
EngineError,
PositionString,
createPositionString,
Move,
createMove,
truncateLog,
IBaseSearchOptions,
IBaseSearchInfo,
IBaseSearchResult,
IScoreInfo,
createI18nKey } from "@multi-game-engines/core";
/**
* Branded Type for SFEN (Shogi Forsyth-Edwards Notation) strings.
*/
export type SFEN = PositionString<"SFEN">;
/**
* 将棋の指し代表現 (USI形式: 7g7f, 8h2b+ 等)。
*/
export type ShogiMove = Move<"ShogiMove">;
/**
* 将棋の探索オプション。
*/
export interface IShogiSearchOptions extends IBaseSearchOptions {
sfen?: SFEN | undefined;
ponder?: boolean | undefined;
depth?: number | undefined;
nodes?: number | undefined;
time?: number | undefined;
movetime?: number | undefined;
[key: string]: unknown;
}
/**
* 将棋の探索状況。
*/
export interface IShogiSearchInfo extends IBaseSearchInfo {
depth?: number | undefined;
seldepth?: number | undefined;
time?: number | undefined;
nodes?: number | undefined;
nps?: number | undefined;
hashfull?: number | undefined;
score?: IScoreInfo | undefined;
pv?: ShogiMove[] | undefined;
currMove?: ShogiMove | undefined;
multipv?: number | undefined;
[key: string]: unknown;
}
/**
* 将棋の探索結果。
*/
export interface IShogiSearchResult extends IBaseSearchResult {
bestMove: ShogiMove | null;
ponder?: ShogiMove | null | undefined;
[key: string]: unknown;
}
/**
* 将棋の指し手バリデータファクトリ。
*/
export function createShogiMove(move: string): ShogiMove {
if (typeof move !== "string" || move.trim().length === 0) {
const i18nKey = createI18nKey("engine.errors.invalidShogiMove");
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey),
i18nKey,
});
}
// 2026 Best Practice: 制御文字（インジェクション試行）を早期に拒否
if (/[\r\n\t\f\v\0]/.test(move)) {
const i18nKey = createI18nKey("engine.errors.injectionDetected");
const i18nParams = { context: "Move", input: truncateLog(move) };
throw new EngineError({
code: EngineErrorCode.SECURITY_ERROR,
message: translate(i18nKey, i18nParams),
i18nKey,
i18nParams,
});
}
// 2026 Best Practice: USI プロトコル仕様に準拠した厳格なケース検証 (Case-sensitive)
// 通常の指し手: 7g7f, 8h2b+ (列: 1-9, 段: a-i)
// 打ち手: P*3d (駒は大文字 [PLNSGRB])
// 特殊: resign, win, none, (none) (すべて小文字)
if (
!/^[1-9][a-i][1-9][a-i]\+?$|^[PLNSGRB]\*[1-9][a-i]$|^resign$|^win$|^none$|^\(none\)$/.test(
move,
)
) {
const i18nKey = createI18nKey("engine.errors.invalidMoveFormat");
const i18nParams = { move: truncateLog(move) };
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey, i18nParams),
i18nKey,
i18nParams,
});
}
return createMove<"ShogiMove">(move);
}
/**
* 将棋の駒識別子。
* 大文字は先手 (Sente)、小文字は後手 (Gote)。
* "+" プレフィックスは成駒を表す。
*/
export type ShogiPiece =
| "P"
| "L"
| "N"
| "S"
| "G"
| "B"
| "R"
| "K"
| "p"
| "l"
| "n"
| "s"
| "g"
| "b"
| "r"
| "k"
| "+P"
| "+L"
| "+N"
| "+S"
| "+B"
| "+R"
| "+p"
| "+l"
| "+n"
| "+s"
| "+b"
| "+r";
/**
* Represents the count of captured pieces in Shogi.
*/
export interface ShogiHand {
P: number;
L: number;
N: number;
S: number;
G: number;
B: number;
R: number;
p: number;
l: number;
n: number;
s: number;
g: number;
b: number;
r: number;
}
/**
* Parsed SFEN result containing the 2D board array, turn, and hand counts.
*/
export interface ParsedSFEN {
/** 9x9 grid of pieces. board[0] is Rank 1 (top), board[8] is Rank 9 (bottom). */
board: (ShogiPiece | null)[][];
/** Whose turn it is: 'b' for Sente (Black), 'w' for Gote (White). */
turn: "b" | "w";
/** Counts of pieces in hand. */
hand: ShogiHand;
}
/**
* SFEN 形式の文字列を厳密に検証し、Branded Type を返します。
*/
export function createSFEN(pos: string): SFEN {
if (typeof pos !== "string" || pos.trim().length === 0) {
const i18nKey = createI18nKey("engine.errors.invalidSFEN");
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey),
i18nKey,
});
}
const trimmedPos = pos.trim();
if (!/^[0-9a-zA-Z/+ -]+$/.test(trimmedPos)) {
const i18nKey = createI18nKey("engine.errors.illegalCharacters");
throw new EngineError({
code: EngineErrorCode.SECURITY_ERROR,
message: translate(i18nKey),
i18nKey,
remediation:
"SFEN should only contain board pieces [PLNSGBRK...], counts [1-9], '+', '/', '-', and spaces.",
});
}
const fields = trimmedPos.split(/\s+/);
if (fields.length !== 4) {
const i18nKey = createI18nKey("engine.errors.invalidSFENStructure");
const i18nParams = { count: fields.length };
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey, i18nParams),
i18nKey,
i18nParams,
remediation: "SFEN must contain: [board] [turn] [hand] [moveCount]",
});
}
// 2nd field: Turn (b or w)
if (!/^[bw]$/.test(fields[1]!)) {
const i18nKey = createI18nKey("engine.errors.invalidSFENTurn");
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey),
i18nKey,
});
}
// 3rd field: Hand pieces (e.g., 2P3p or -)
if (!/^(?:(?:[1-9][0-9]*)?[PLNSGBRplnsgbr])+$|^-$/.test(fields[2]!)) {
const i18nKey = createI18nKey("engine.errors.invalidSFENHand");
const i18nParams = { hand: fields[2]! };
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey, i18nParams),
i18nKey,
i18nParams,
});
}
// 4th field: Move counter (>= 1)
const moveCountNum = Number(fields[3]!);
if (!Number.isInteger(moveCountNum) || moveCountNum < 1) {
const i18nKey = createI18nKey("engine.errors.invalidSFENMoveCounter");
const i18nParams = { counter: fields[3]! };
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey, i18nParams),
i18nKey,
i18nParams,
});
}
return createPositionString<"SFEN">(trimmedPos);
}
export function isValidShogiPiece(str: string): str is ShogiPiece {
return /^(?:\+[PLNSBRplnsbr]|[PLNSGBRKplnsgbrk])$/.test(str);
}
export function isShogiHandKey(piece: unknown): piece is keyof ShogiHand {
return typeof piece === "string" && /^[PLNSGBRplnsgbr]$/.test(piece);
}
/**
* SFEN 文字列を解析して 2D 盤面配列と持ち駒数に変換します。
*/
export function parseSFEN(sfen: SFEN): ParsedSFEN {
const parts = sfen.trim().split(/\s+/);
const position = parts[0]!;
const turn = parts[1] as "b" | "w";
const handStr = parts[2] || "-";
const rows = position.split("/");
if (rows.length !== 9) {
const i18nKey = createI18nKey("engine.errors.invalidSfenRanks");
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey),
i18nKey,
});
}
const board: (ShogiPiece | null)[][] = [];
for (let r = 0; r < 9; r++) {
const row = rows[r]!;
const boardRow: (ShogiPiece | null)[] = [];
let i = 0;
while (i < row.length) {
const char = row[i]!;
if (/[1-9]/.test(char)) {
const emptyCount = parseInt(char, 10);
for (let j = 0; j < emptyCount; j++) boardRow.push(null);
i++;
} else if (char === "+") {
const piece = `+${row[i + 1]}`;
if (isValidShogiPiece(piece)) {
boardRow.push(piece);
i += 2;
} else {
const i18nKey = createI18nKey("engine.errors.invalidSfenPiece");
const i18nParams = { piece };
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey, i18nParams),
i18nKey,
i18nParams,
});
}
} else if (isValidShogiPiece(char)) {
boardRow.push(char);
i++;
} else {
const i18nKey = createI18nKey("engine.errors.invalidSfenChar");
const i18nParams = { char };
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey, i18nParams),
i18nKey,
i18nParams,
});
}
}
if (boardRow.length !== 9) {
const i18nKey = createI18nKey("engine.errors.invalidSfenRankWidth");
const i18nParams = { rank: r + 1, expected: 9, actual: boardRow.length };
throw new EngineError({
code: EngineErrorCode.VALIDATION_ERROR,
message: translate(i18nKey, i18nParams),
i18nKey,
i18nParams,
});
}
board.push(boardRow);
}
const hand: ShogiHand = {
P: 0,
L: 0,
N: 0,
S: 0,
G: 0,
B: 0,
R: 0,
p: 0,
l: 0,
n: 0,
s: 0,
g: 0,
b: 0,
r: 0,
};
if (handStr !== "-") {
let i = 0;
while (i < handStr.length) {
let countStr = "";
while (i < handStr.length && /[0-9]/.test(handStr[i]!)) {
countStr += handStr[i]!;
i++;
}
const count = countStr === "" ? 1 : parseInt(countStr, 10);
const pieceChar = handStr[i]!;
Eif (isShogiHandKey(pieceChar)) hand[pieceChar] = count;
i++;
}
}
return { board, turn, hand };
}
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