Tools & Wizards About Us
vi.lichess.org screenshot

Report Summary

  • 80

    Performance

    Renders faster than
    86% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

vi.lichess.org

lichess.org • Free Online Chess

Page Load Speed

1.5 sec in total

First Response

448 ms

Resources Loaded

815 ms

Page Rendered

208 ms

vi.lichess.org screenshot

About Website

Visit vi.lichess.org now to see the best up-to-date Vi Li Chess content for United States and also check out these interesting facts you probably never knew about vi.lichess.org

Free online chess server. Play chess in a clean interface. No registration, no ads, no plugin required. Play chess with the computer, friends or random opponents.

Visit vi.lichess.org

Key Findings

We analyzed Vi.lichess.org page load time and found that the first response time was 448 ms and then it took 1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

vi.lichess.org performance score

80

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

49/100

25%

SI (Speed Index)

Value3.2 s

91/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.1 s

87/100

10%

Network Requests Diagram

vi.lichess.org

448 ms

css

102 ms

common.css

52 ms

board.css

45 ms

home.css

55 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that 4% of them (1 request) were addressed to the original Vi.lichess.org, 48% (11 requests) were made to Lichess1.org and 13% (3 requests) were made to D27t3nufpewl0w.cloudfront.net. The less responsive or slowest element that took the longest time to load (448 ms) belongs to the original domain Vi.lichess.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 259.0 kB (64%)

Content Size

402.6 kB

After Optimization

143.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vi.lichess.org main page is 402.6 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Javascripts take 237.0 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 39.2 kB

  • Original 49.4 kB
  • After minification 44.5 kB
  • After compression 10.3 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 39.2 kB or 79% of the original size.

Image Optimization

-0%

Potential reduce by 10 B

  • Original 28.6 kB
  • After minification 28.6 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Vi Li Chess images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 153.9 kB

  • Original 237.0 kB
  • After minification 236.1 kB
  • After compression 83.2 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 153.9 kB or 65% of the original size.

CSS Optimization

-75%

Potential reduce by 65.9 kB

  • Original 87.6 kB
  • After minification 86.4 kB
  • After compression 21.6 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Vi.lichess.org needs all CSS files to be minified and compressed as it can save up to 65.9 kB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (61%)

Requests Now

18

After Optimization

7

  • Images
  • JavaScript
  • CSS

The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vi Li Chess. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vi.lichess.org

vi.lichess.org

448 ms

css

css

102 ms

common.css

common.css

52 ms

board.css

board.css

45 ms

home.css

home.css

55 ms

cburnett.css

cburnett.css

42 ms

bb5e97a98333e2e9a59d041bf3a249437bca4f5f_chess_efficiency_marketing-512.png

bb5e97a98333e2e9a59d041bf3a249437bca4f5f_chess_efficiency_marketing-512.png

146 ms

jquery.min.js

jquery.min.js

62 ms

deps.min.js

deps.min.js

62 ms

moment.min.js

moment.min.js

74 ms

big.js

big.js

61 ms

lichess.lobby.min.js

lichess.lobby.min.js

44 ms

vi.js

vi.js

187 ms

vi.js

vi.js

197 ms

140b14ba2d229e56d261cfcc7f890ab0405bc043_tshirt.png

140b14ba2d229e56d261cfcc7f890ab0405bc043_tshirt.png

146 ms

3d03bf529bc2e6a0c5ef9b64d489c2285de2da23_explorer-icon.png

3d03bf529bc2e6a0c5ef9b64d489c2285de2da23_explorer-icon.png

143 ms

brown.png

brown.png

6 ms

analytics.js

analytics.js

85 ms

LeFlHvsZjXu2c3ZRgBq9nKCWcynf_cDxXwCLxiixG1c.ttf

LeFlHvsZjXu2c3ZRgBq9nKCWcynf_cDxXwCLxiixG1c.ttf

32 ms

PIbvSEyHEdL91QLOQRnZ14nF5uFdDttMLvmWuJdhhgs.ttf

PIbvSEyHEdL91QLOQRnZ14nF5uFdDttMLvmWuJdhhgs.ttf

60 ms

lichess.woff

lichess.woff

24 ms

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

61 ms

collect

collect

38 ms

Accessibility Review

vi.lichess.org accessibility score

92

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

Best Practices

vi.lichess.org best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

vi.lichess.org SEO score

82

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    VI

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vi.lichess.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Vietnamese language. Our system also found out that Vi.lichess.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

vi.lichess.org

Open Graph data is detected on the main page of Vi Li Chess. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: