window.chesscom = window.chesscom || {}; window.chesscom.features = (window.chesscom.features || []).concat([ 'chessboard_slam_animation', 'cc_glyph_icons_2025', 'chessboard_disable_rook_castling', 'chessboard_no_mobile_padding', 'events_banner_ads', 'friend_service_read_enabled', 'play_base_global_resources', 'play_leagues_division_start_modal', 'play_sidebar_redesign', 'turnstile_in_registration_modal', 'user_activity_service_on_chesscom', 'web_coach_games_in_archive', 'wide_eval_bar', 'web_fe_oauth', 'ads_confiant_rollout', 'amplitude_domain_proxy', 'amplitude_navbar_click_events', 'amplitude_navbar_events', 'amplitude_navbar_viewed_event', 'analysis_improve_show_moves', 'analysis_wasm_torch', 'apple_pay_3rd_party_browsers_support', 'board_settings_move_classification_style', 'cf_managed_challenge_handler', 'chat_club_chats_visibility', 'chessboard_beta', 'chessboard_hotkeys', 'client_play-computer_beta', 'clubs_service_migration_clubs-search', 'coach_audio_multiple_languages', 'emit_strongly_typed_events', 'enable_banned_email_validation_onboarding', 'enable_fcm_push_event_v2', 'engine_threads_setting', 'engine_time_limit', 'evaluate_starting_fen_plus_moves', 'events_live_ratings', 'events_search_v2', 'fcm_track_user_activity_enabler_test', 'friend_page_use_friends_service', 'friends_remove_social_widget', 'friends_search_fe_battle_and_classroom', 'friends_search_fe_friends_dropdown', 'friends_search_fe_membership_gift', 'friends_search_fe_navbar_search', 'friends_search_fe_online_count', 'friends_search_fe_stats', 'friends_search_fe_stats_tactics', 'friends_search_prioritize_exact_match', 'game_chat_events', 'hide_game_stats_accuracy', 'hide_verified_link', 'home_coach_nudges', 'home_game_review_optimization', 'home_hide_activity_optimization', 'home_hide_awards_optimization', 'home_hide_clubs_and_club_events_optimization', 'home_hide_friends_optimization', 'home_hide_leagues_optimization', 'home_hide_streamers_optimization', 'home_hide_tournaments_optimization', 'home_nudge_v2_master_game_review', 'intercom_new_config', 'kount_sdk_async', 'learn_event_tracking', 'learn_path_new', 'lesson_complete_modal', 'lessons_wait_for_save', 'livechess_kill_engines', 'liveramp_gam_key', 'marketing_banners', 'marketing_middleware_serverside_device_id_generation', 'master_advice_learn', 'move_event_search_building_to_backend', 'navigation_xss_notification_prevention', 'new_eco_data_webapp', 'new_explorer_service', 'new_profile_page', 'new_second_chance_note_waive_appeal', 'no_invalid_position_eval', 'no_json_handling_on_register_errors', 'onboarding_how_did_you_hear_about_us', 'onboarding_theme_step_update', 'otvc_suspicious_login_protection', 'payments_proto_tax_lines', 'play_challenge_idl_events', 'presence_pubsub_transport', 'profile_amplitude_events', 'profile_coach_reviews', 'puzzle_difficulty_setting', 'puzzles_free_trial_redesign', 'puzzles_v2_settings_hint', 'recommended_matches_v2', 'record_turnstile_frontend_data', 'recovery_turnstile_captcha', 'refactored_vml_web_component', 'register_disable_facebook_registration', 'remove_home_nudge_v2_game_review', 'reopen_account_endpoint', 'sanction_belarus_flag', 'sanction_russia_flag', 'save_coach_games', 'security_private_diagram', 'share_modal_markings', 'shutdown_amplitude', 'sidebar_search_use_friends_service', 'speech_audio_new_url', 'stockfish_15_1', 'stockfish_16', 'stockfish_16_1_torch_2', 'stockfish_release_a', 'sunset_komodo', 'tiptap_on_profile_pages', 'toaster_center_tab_tooltips', 'trans_util_sanitization', 'trust_and_safety_enable_otvc_web', 'turnstile_widget_metrics', 'use_fake_worker_stockfish', 'username_search_autocomplete_email', 'web_audio_use_new_sound_url', 'web_coach_switch_user_activity', 'web_consistent_onboarding_design', 'web_courses_client', 'web_courses_how_it_works_widget', 'web_courses_paid_items', 'web_courses_preview', 'web_discord_flair', 'web_duolingo_flair', 'web_fe_oauth_refresh_pubsub_connection', 'web_index_with_fold', 'web_hoist_chessbomb_api_url', 'web_opm_modal_friends_family_announcement', 'web_opm_modal_staff_flair_cancun', 'web_phone_number_core', 'web_phone_number_registration', 'web_phone_number_signup', 'web_report_with_game_id', 'web_settings_redesign', 'web_summer_sale_incentive', 'web_smart_email_opt_in', 'web_use_kick_updated_api', 'web_user_navigated_event', 'youtube_nocookie_rewrite' ]); window.chesscom.featuresConfig = Object.assign( window.chesscom.featuresConfig || {}, 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); window.chesscom = window.chesscom || {}; // Before adding global experiments please check in #experiments_chat slack channel for the performance costs window.chesscom.experiments = {"web_index_with_fold_test":null,"index_page_test_lessons_cta_and_header_update":null,"puzzles_v2_with_coach_web":null,"ab_onboarding_signup_takeover":null,"web_ad_quality_vendor_testing":null} 18,090,010 Games Today 123,446 Playing Now "Puzzles are the best way to improve pattern recognition, and no site does it better." "Chess.com lessons make it easy to learn to play, then challenge you to continue growing."
