A simple Streamlit form that provides three options using checkboxes.

multi_checkboxes.py

import streamlit as st
import time

form = st.sidebar.form("form", clear_on_submit=True)
with form:
    form.write("**`Choose a box :`**")
    tick_boxes = form.columns(3)
    col_labels = [col.write(f"`Option {idx + 1}`") for idx, col in enumerate(tick_boxes)]
    values = [
        col.checkbox(f"{idx + 1}", key=f"{idx+1}", value=False)
        for idx, col in enumerate(tick_boxes)
    ]
    form.write("")

submit = form.form_submit_button("Submit")
st.info("**Choose an option using the boxes in the sidebar.**")

if submit:
    list_values = [int(i) for i in values]
    if sum(list_values) == 0:
        st.error("**Choose an option!**")
        time.sleep(1)
        st.experimental_rerun()

    elif sum(list_values) > 1:
        st.error("**You can only tick one box!**")
        time.sleep(1)
        st.experimental_rerun()

    elif sum(list_values) == 1:
        # --->
        # the 'value' variable is the one you then use in if-statements:
        # >>> if value == 1:
        value = list_values.index(1) + 1
        # --->
        st.success(f"**Player choose option << {value} >>.**")