diff --git a/src/botutils.go b/src/botutils.go
index e4168d8..129f585 100644
--- a/src/botutils.go
+++ b/src/botutils.go
@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"fmt"
+	"time"
 
 	"github.com/go-telegram/bot"
 	"github.com/go-telegram/bot/models"
@@ -38,3 +39,7 @@ func FetchMemberFromChat(ctx context.Context, b *bot.Bot, chatID int64, userID i
 func IsAdmin(member models.ChatMember) bool {
 	return member.Administrator != nil || member.Owner != nil
 }
+
+func DeleteAfterSeconds(chatID int64, msgID int, seconds int) error {
+	return AddMessageToDelete(MessageToDelete{MessageId: msgID, ChatId: chatID, DeleteDate: time.Now().Add(time.Duration(seconds) * time.Second).Unix(), Tries: 0})
+}
diff --git a/src/db.go b/src/db.go
index 6767ebf..b0885a0 100644
--- a/src/db.go
+++ b/src/db.go
@@ -27,7 +27,8 @@ create table if not exists messagesToDelete
 id INTEGER PRIMARY KEY AUTOINCREMENT,
 message_id INTEGER,
 chat_id INTEGER,
-delete_date INTEGER
+delete_date INTEGER,
+tries INTEGER
 );
 
 create table if not exists users
@@ -71,6 +72,7 @@ type MessageToDelete struct {
 	MessageId  int   `db:"message_id"`
 	ChatId     int64 `db:"chat_id"`
 	DeleteDate int64 `db:"delete_date"`
+	Tries      int   `db:"tries"`
 }
 
 type User struct {
@@ -79,6 +81,14 @@ type User struct {
 	Username string `db:"username"`
 }
 
+type Captcha struct {
+	Id            int64 `db:"id"`
+	UserID        int64 `db:"user_id"`
+	ChatID        int64 `db:"chat_id"`
+	MessageID     int   `db:"message_id"`
+	CorrectAnswer int   `db:"correct_answer"`
+}
+
 var db *sqlx.DB
 
 func InitDb() error {
@@ -127,7 +137,7 @@ func NewActivation(code string) error {
 
 func UseActivation(code string) bool {
 	exists := false
-	err := db.Get(&exists, `SELECT exists(SELECT 1 FROM chats WHERE code = $1);`, code)
+	err := db.Get(&exists, `SELECT exists(SELECT 1 FROM activations WHERE code = $1);`, code)
 	if err != nil || !exists {
 		return false
 	}
@@ -141,7 +151,7 @@ func ActivateChat(id int64) error {
 }
 
 func AddMessageToDelete(msg MessageToDelete) error {
-	_, err := db.NamedExec(`insert into messagesToDelete (message_id, chat_id, delete_date) values (:message_id, :chat_id, :delete_date)`, msg)
+	_, err := db.NamedExec(`insert into messagesToDelete (message_id, chat_id, delete_date, tries) values (:message_id, :chat_id, :delete_date, 0)`, msg)
 	return err
 }
 
diff --git a/src/handlers.go b/src/handlers.go
index 5620c43..33f798f 100644
--- a/src/handlers.go
+++ b/src/handlers.go
@@ -2,9 +2,12 @@ package main
 
 import (
 	"context"
+	"database/sql"
+	"errors"
+	"fmt"
 	"log"
+	"strconv"
 	"strings"
-	"time"
 
 	"github.com/go-telegram/bot"
 	"github.com/go-telegram/bot/models"
@@ -15,6 +18,9 @@ func defaultHandler(ctx context.Context, b *bot.Bot, update *models.Update) {
 	// 	ChatID: update.Message.Chat.ID,
 	// 	Text:   "hello!",
 	// })
+	if update.Message != nil {
+		log.Println(update.Message.Text)
+	}
 	log.Println(*update)
 }
 
@@ -33,7 +39,7 @@ func registerChat(ctx context.Context, b *bot.Bot, update *models.Update) {
 			return
 		}
 		if !UseActivation(args[1]) {
-			log.Println("register: wrong code")
+			log.Println("register: wrong code: ", args[1])
 			return
 		}
 		if err := ActivateChat(msg.Chat.ID); err != nil {
@@ -43,7 +49,7 @@ func registerChat(ctx context.Context, b *bot.Bot, update *models.Update) {
 		b.DeleteMessage(ctx, &bot.DeleteMessageParams{ChatID: msg.Chat.ID, MessageID: msg.ID})
 		sent, err := b.SendMessage(ctx, &bot.SendMessageParams{ChatID: msg.Chat.ID, Text: "Чат зарегистрирован", MessageThreadID: msg.MessageThreadID})
 		if err == nil {
-			err := AddMessageToDelete(MessageToDelete{MessageId: sent.ID, ChatId: msg.Chat.ID, DeleteDate: time.Now().Add(1 * time.Minute).Unix()})
+			err := DeleteAfterSeconds(msg.Chat.ID, sent.ID, 60)
 			if err != nil {
 				log.Println("register: failed to add to delete", err)
 			}
@@ -55,10 +61,79 @@ func registerChat(ctx context.Context, b *bot.Bot, update *models.Update) {
 
 func handleNewJoined(ctx context.Context, b *bot.Bot, u *models.Update) {
 	for _, user := range u.Message.NewChatMembers {
-		log.Println(user)
+		_, err := db.Exec(`INSERT INTO captchas (user_id, chat_id, message_id, correct_answer) values ($1, $2, 0, 0)`, user.ID, u.Message.Chat.ID)
+		if err != nil {
+			log.Println("newusers: can't add to db: ", err)
+		}
+		b.SendMessage(ctx, &bot.SendMessageParams{
+			ChatID: u.Message.Chat.ID,
+			Text:   "Check the capthca!",
+			ReplyMarkup: models.InlineKeyboardMarkup{
+				InlineKeyboard: [][]models.InlineKeyboardButton{
+					{
+						{URL: fmt.Sprintf("https://t.me/nefrace_php_test_bot?start=cap_%d", u.Message.Chat.ID), Text: "Check"},
+					},
+				},
+			},
+		})
 	}
 }
 
 func banUser(ctx context.Context, b *bot.Bot, u *models.Update) {
 
 }
+
+func handlePrivateStartCaptcha(ctx context.Context, b *bot.Bot, u *models.Update) {
+	args := strings.Split(u.Message.Text, " ")
+	userID := u.Message.From.ID
+	chatID := 0
+	if len(args) > 1 {
+		chat_str := strings.TrimPrefix(args[1], "cap_")
+		id, err := strconv.Atoi(chat_str)
+		if err == nil {
+			chatID = id
+		}
+	}
+
+	captcha := Captcha{}
+	var err error
+	if chatID != 0 {
+		err = db.Get(&captcha, `select * from captchas where user_id = $1 and chat_id = $2`, userID, chatID)
+		if errors.Is(err, sql.ErrNoRows) {
+			b.SendMessage(ctx, &bot.SendMessageParams{
+				Text:   " There's no captchas for that chat you came from.",
+				ChatID: u.Message.Chat.ID,
+			})
+			return
+		}
+	} else {
+		err = db.Get(&captcha, `select * from captchas where user_id = $1 and correct_answer != 0`, userID)
+		if err != nil {
+			b.SendMessage(ctx, &bot.SendMessageParams{
+				Text:   " There's no captchas for that chat you came from.",
+				ChatID: u.Message.Chat.ID,
+			})
+			return
+		}
+	}
+
+	if captcha.CorrectAnswer == 0 {
+		captcha.CorrectAnswer = 42
+		msg, err := b.SendMessage(ctx, &bot.SendMessageParams{
+			Text:   "Get me the answer!",
+			ChatID: u.Message.Chat.ID,
+		})
+		if err == nil {
+			captcha.MessageID = msg.ID
+		}
+		_, err = db.NamedExec("update captchas set correct_answer = :correct_answer, message_id = :message_id where id = :id", captcha)
+		if err != nil {
+			log.Println("Can't update captcha:", err)
+		}
+	} else {
+		b.SendMessage(ctx, &bot.SendMessageParams{
+			Text:   fmt.Sprintf("You already have captcha for chat %d", captcha.ChatID),
+			ChatID: u.Message.Chat.ID,
+		})
+	}
+}
diff --git a/src/main.go b/src/main.go
index cc00375..126ac83 100644
--- a/src/main.go
+++ b/src/main.go
@@ -2,8 +2,11 @@ package main
 
 import (
 	"context"
+	"log"
 	"os"
 	"os/signal"
+	"strings"
+	"time"
 
 	_ "github.com/glebarez/go-sqlite"
 	"github.com/go-telegram/bot"
@@ -36,5 +39,45 @@ func main() {
 	b.RegisterHandlerMatchFunc(func(update *models.Update) bool {
 		return update.Message != nil && len(update.Message.NewChatMembers) > 0
 	}, handleNewJoined)
+	b.RegisterHandlerMatchFunc(func(update *models.Update) bool {
+		return update.Message != nil && update.Message.Chat.Type == "private" && strings.HasPrefix(update.Message.Text, "/start")
+	}, handlePrivateStartCaptcha)
+
+	go timedTask(ctx, b)
+
 	b.Start(ctx)
 }
+
+func timedTask(ctx context.Context, b *bot.Bot) {
+	timer := time.NewTicker(time.Second * 30)
+
+task:
+	for {
+		select {
+		case <-timer.C:
+			deleteOldMessages(ctx, b)
+		case <-ctx.Done():
+			break task
+		}
+	}
+}
+
+func deleteOldMessages(ctx context.Context, b *bot.Bot) {
+	now := time.Now().Unix()
+	messages := []MessageToDelete{}
+	err := db.Select(&messages, `SELECT * from messagesToDelete WHERE delete_date < $1`, now)
+	if err != nil {
+		log.Println("delete_old: can't get messages: ", err)
+	}
+	for _, message := range messages {
+		success, err := b.DeleteMessage(ctx, &bot.DeleteMessageParams{ChatID: message.ChatId, MessageID: message.MessageId})
+		if !success {
+			log.Println("delete_old, message wasn't deleted: ", message.MessageId, " :: ", err)
+			db.Exec(`UPDATE messagesToDelete set tries = tries + 1 where id = $1`, message.Id)
+			if message.Tries < 3 {
+				continue
+			}
+		}
+		db.Exec(`DELETE FROM messagesToDelete WHERE id = $1`, message.Id)
+	}
+}
diff --git a/src/middleware.go b/src/middleware.go
index b39c441..1685669 100644
--- a/src/middleware.go
+++ b/src/middleware.go
@@ -17,6 +17,7 @@ func checkRegistered(next bot.HandlerFunc) bot.HandlerFunc {
 		}
 		chat := update.Message.Chat
 		if chat.Type == "private" {
+			next(ctx, b, update)
 			return
 		}
 		if !IsChatActive(chat.ID) && !strings.HasPrefix(update.Message.Text, "/register") {