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handle variations in move list #158

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handle variations in move list #158

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72 changes: 47 additions & 25 deletions lc0_main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -240,43 +240,65 @@ func (c *cmdWrapper) openInput() {

func convertMovesToPGN(moves []string, result string, start_ply_count int) string {
game := chess.NewGame(chess.UseNotation(chess.LongAlgebraicNotation{}))
pgn := ""
move_no := 1
if len(moves) > 6 && moves[len(moves)-7] == "from_fen" {
fen := strings.Join(moves[len(moves)-6:], " ")
pgn += fmt.Sprintf("[FEN \"%s\"]\n", fen)
move_no, _ = strconv.Atoi(moves[len(moves)-1])
moves = moves[:len(moves)-7]
pair := &chess.TagPair{
Key: "FEN",
Value: fen,
}
tagPairs := []*chess.TagPair{pair}
fen_func, _ := chess.FEN(fen)
game = chess.NewGame(chess.UseNotation(chess.LongAlgebraicNotation{}), fen_func, chess.TagPairs(tagPairs))
game = chess.NewGame(chess.UseNotation(chess.LongAlgebraicNotation{}), fen_func)
}
pgn += "\n"
position := game.Position()
if position.Turn() == chess.Black {
pgn += fmt.Sprintf("%d...", move_no)
}
for _, m := range moves {
if strings.HasPrefix(m, "(") {
// We use a game to get + and # annotations.
// Here position is before the previous move.
fen_func, _ := chess.FEN(position.String())
game2 := chess.NewGame(chess.UseNotation(chess.LongAlgebraicNotation{}), fen_func)
game2.MoveStr(strings.Trim(m, "()"))
game2_moves := game2.Moves()
var_move := game2_moves[len(game2_moves)-1]
var_move_str := chess.AlgebraicNotation{}.Encode(position, var_move)
if position.Turn() == chess.White {
pgn += fmt.Sprintf("(%d.%s) ", move_no, var_move_str)
} else {
pgn += fmt.Sprintf("(%d...%s) ", move_no-1, var_move_str)
}
continue
}
position = game.Position()
err := game.MoveStr(m)
if err != nil {
log.Fatalf("movstr: %v", err)
}
}
if game.Outcome() == chess.NoOutcome && len(game.EligibleDraws()) > 1 {
game.Draw(game.EligibleDraws()[1])
}
game2 := chess.NewGame()
b, err := game.MarshalText()
if err != nil {
log.Fatalf("MarshalText failed: %v", err)
}
b_str := string(b)
if strings.HasSuffix(b_str, " *") && result != "" {
to_append := "1/2-1/2"
if result == "whitewon" {
to_append = "1-0"
} else if result == "blackwon" {
to_append = "0-1"
game_moves := game.Moves()
move := game_moves[len(game_moves)-1]
move_str := chess.AlgebraicNotation{}.Encode(position, move)
if position.Turn() == chess.White {
pgn += fmt.Sprintf("%d.%s ", move_no, move_str)
} else {
pgn += fmt.Sprintf("%s ", move_str)
move_no++
}
b = []byte(strings.TrimRight(b_str, "*") + to_append)
}
game2.UnmarshalText(b)
return game2.String() + " {OL: " + strconv.Itoa(start_ply_count) + "}"

if result == "" {
pgn += "*"
} else if result == "whitewon" {
pgn += "1-0"
} else if result == "blackwon" {
pgn += "0-1"
} else {
pgn += "1/2-1/2"
}

return pgn + " {OL: " + strconv.Itoa(start_ply_count) + "}"
}

func createCmdWrapper() *cmdWrapper {
Expand Down