Fix relative paths

parent 62fb0dc4
......@@ -15,7 +15,7 @@ title: Analysing the 125,262 puzzles in the lichess puzzle set
# Ratings
[![](/s/img/20180921/plot-ratings-attempts-cnormal-sm.svg)](/s/img/20180921/plot-ratings-attempts-cnormal-lg.svg)
[![](./s/img/20180921/plot-ratings-attempts-cnormal-sm.svg)](./s/img/20180921/plot-ratings-attempts-cnormal-lg.svg)
The lichess puzzleset is quite diverse, with ratings spanning from 767
([puzzle #11219](https://lichess.org/training/11219)) from 2926
......@@ -28,7 +28,7 @@ range: 90% of attempted puzzles have a rating below 2000.
[![](/s/img/20180921/plot-votes-avg-sm.svg)](/s/img/20180921/plot-votes-avg-lg.svg)
[![](./s/img/20180921/plot-votes-avg-sm.svg)](./s/img/20180921/plot-votes-avg-lg.svg)
Puzzles generally receive positive votes by players. However, higher
rated puzzles tend to receive more negative votes. Maybe players vent
......@@ -37,7 +37,7 @@ correctly by voting them down.
[![](/s/img/20180921/plot-player-ratings-sm.svg)](/s/img/20180921/plot-player-ratings-lg.svg)
[![](./s/img/20180921/plot-player-ratings-sm.svg)](./s/img/20180921/plot-player-ratings-lg.svg)
Puzzle rating dosen't seem to be strongly correlated with the rating
of the players from the source game.
......@@ -46,7 +46,7 @@ of the players from the source game.
# Depth
[![](/s/img/20180921/plot-depth-avg-sm.svg)](/s/img/20180921/plot-depth-avg-lg.svg)
[![](./s/img/20180921/plot-depth-avg-sm.svg)](./s/img/20180921/plot-depth-avg-lg.svg)
As expected, higher rated puzzles require more calculation on average,
but the standard deviation is still very high: harder puzzles are all
......@@ -54,14 +54,14 @@ over the place, when it comes to calculation depth.
# Time
[![](/s/img/20180921/plot-plies-cnormal-sm.svg)](/s/img/20180921/plot-plies-cnormal-lg.svg)
[![](./s/img/20180921/plot-plies-cnormal-sm.svg)](./s/img/20180921/plot-plies-cnormal-lg.svg)
Tactical opportunities seem to happen regularly throughout the
game. Half of the puzzles happen before the 23rd move. 80% of puzzles
take place between the 11th and the 42nd move.
[![](/s/img/20180921/plot-times-sm.svg)](/s/img/20180921/plot-times-lg.svg)
[![](/s/img/20180921/plot-times-cnormal-sm.svg)](/s/img/20180921/plot-times-cnormal-lg.svg)
[![](./s/img/20180921/plot-times-sm.svg)](./s/img/20180921/plot-times-lg.svg)
[![](./s/img/20180921/plot-times-cnormal-sm.svg)](./s/img/20180921/plot-times-cnormal-lg.svg)
The majority of puzzles come from either blitz or rapid games. Puzzles
from bullet games are slightly in the lower end of the rating range,
......@@ -73,29 +73,29 @@ and correspondence games yield slightly more highly rated puzzles.
[Ormulogun](https://artefact2.gitlab.io/ormulogun/), which is far
from perfect at identifying everything. Chess is hard.*
[![](/s/img/20180921/plot-motifs-freq-sm.svg)](/s/img/20180921/plot-motifs-freq-lg.svg)
[![](./s/img/20180921/plot-motifs-freq-sm.svg)](./s/img/20180921/plot-motifs-freq-lg.svg)
Easier puzzles feature more forks, harder puzzles feature more
discovered attacks and pins. The other motifs seem roughly consistent
across the whole rating range.
[![](/s/img/20180921/plot-motifs-cnormal-sm.svg)](/s/img/20180921/plot-motifs-cnormal-lg.svg)
[![](./s/img/20180921/plot-motifs-cnormal-sm.svg)](./s/img/20180921/plot-motifs-cnormal-lg.svg)
Puzzles with forks tend to be the easiest, with a median rating of about 1450, while puzzles with
discovered checks or pins tend to be the hardest, with a median rating of about 2200.
# Puzzle types
[![](/s/img/20180921/plot-types-freq-sm.svg)](/s/img/20180921/plot-types-freq-lg.svg)
[![](/s/img/20180921/plot-types-cnormal-sm.svg)](/s/img/20180921/plot-types-cnormal-lg.svg)
[![](./s/img/20180921/plot-types-freq-sm.svg)](./s/img/20180921/plot-types-freq-lg.svg)
[![](./s/img/20180921/plot-types-cnormal-sm.svg)](./s/img/20180921/plot-types-cnormal-lg.svg)
Checkmate puzzles tend to be significantly easier than other kinds of
puzzles, and get rarer as puzzle rating increases.
# Endings
[![](/s/img/20180921/plot-endings-cnormal-sm.svg)](/s/img/20180921/plot-endings-cnormal-lg.svg)
[![](/s/img/20180921/plot-endings-freq-sm.svg)](/s/img/20180921/plot-endings-freq-lg.svg)
[![](./s/img/20180921/plot-endings-cnormal-sm.svg)](./s/img/20180921/plot-endings-cnormal-lg.svg)
[![](./s/img/20180921/plot-endings-freq-sm.svg)](./s/img/20180921/plot-endings-freq-lg.svg)
Ending type seems uncorrelated with puzzle difficulty. Rook endings are
the most common by a fair margin.
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