chessable.com

https://chessable.com· First analyzed 12 May 2026· Updated 12 May 2026

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chessable.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.26.5.56

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

oswald.ns.cloudflare.com.bethany.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

637 ms10%

Speed Index

828 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5.9 MB

72 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

Analytics

Libraries

CSS Frameworks

Icon Libraries

Tag Managers

Customer Support

Popups & Forms

CDN

SEO Analysis

C66/100

Meta Tags11/15

Content9/12

Headings7/8

Technical11/21

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile3/4

Indexability3/3

chessable.comchessable.com

Chessable - Where Science Meets Chess

#1 science-backed chess training app to study openings, tactics, strategy and endgames. Learning chess from top players and coaches made easier. Register 100...

Description truncated.

Title Length37 chars

Recommended: 50-60 chars (~230px / 580px)

Description Length170 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (71/77) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Local SEO

Local Search Readiness

3/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D42/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

14/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:5%

Words:1,282

Token eff.:Optimal

Sections/1K:0.8

Structured Data

No Schema

Citation Readiness

Opening Summary31w

Descriptive Headingsavg 3w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

78/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

15/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

7/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

1 recommendation

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

36/100

615 mg

CO₂e / view

5.9 MB

Page Weight

Cleaner Than

New Visitor

702 mg

Returning (cached)

351 mg

Annual (10K/mo)

73.7 kg

Emission Segments

Data Center

30 mg

Network

181 mg

Device

404 mg

Resource Breakdown

JavaScript

3.5 MB

Images

2.1 MB

CSS

181.7 KB

HTML

10.8 KB

Other

195.1 KB

Green Hosting Verified

Cloudflare

GWF Verified

8 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

A+

Security Score

93%Excellent

Static / Informational

HTTPS

WAF

53d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

06.04.2026

Valid Until

05.07.2026

Subject Alternative Names (4)

*.chessable.com*.sandbox.chessable.com*.sandbox2.chessable.comchessable.com

SHA-256 Fingerprint

8A:56:3E:CE:E1:60:89:87:69:35:97:F7:4E:96:13:21:FE:9F:E7:05...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9fac2b231ea41430-FRA

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

aspmx.l.google.com

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

+1 more

Domain Information

chessable.com

Domain Age

10y 6m

Created

27.10.2015

Expires

27.10.2030

Last Updated

07.08.2024

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Osano

Cookie Consent Banner

Osano

GDPR Indicators

Cookie consent banner detected

CMP: Osano

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

71/100

Mobile Friendly5 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1, shrink-to-fit=no, maximum-scale=1

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Poppins + SF Pro Display

WCAG Partial

67/100

Readability

/30

18/30

15px · LH 1.80

Hierarchy

/20

16/20

3.73x ratio

WCAG

/25

15/25

1.99:1 min contrast

Performance

/25

18/25

2 fonts · 6 req

Heading Font

Poppins

Sans56px

Body Font

SF Pro Display

Sans15px

Contrast Ratio

1.99:1

3 issues

Reading Comfort

~36 CPL

Narrow lines

56px

48px

17px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 2.0:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 3.7x larger than body text.

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFluid TypeFlesch 53

Color Palette

10 unique colors

3.95:1 AA Large Light

#ffffff

Background· 67.4%

#828079

Other· 2.9%

#000000

Primary· 0%

#323143

Secondary· 9.799999999999999%

#1284c5

Accent· 3.9%

#ebe8d2

Primary· 3.7%

#a2c6ae

Secondary· 3.1%

#8d9a76

Secondary· 2.9%

Business & Marketing Stack

4 Tools Detected

Advanced

Customer Support

IntercomMid-Market

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OsanoMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)googletagmanager.com(4)justone.ai(3)widget.intercom.io(1)cfg.dycdn.net(1)

Website Identity

chessable.com

10 years old

Location detected: 🇨🇦 Canadavia ip

GoDaddy.com, LLC📧 Google Workspaceen

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Last analyzed: 12 May 2026 at 20:28

Historical Analysis & Change Tracking