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simplified-jigsaw.html
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simplified-jigsaw.html
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<!doctype html>
<html lang='en'>
<head>
<meta charset='utf-8'>
<title>Ultimate simplified Jigsaw loop</title>
<script src='mino-board.js'></script>
<style>
html
{
font-family: sans-serif;
font-size: 14px;
background-color: #e4e4e4;
color: #111;
}
a {color: #0066cc;}
a:visited {color: #6a40c6;}
a:active {color: #ee0000;}
a:hover {background-color: #ffffff;}
section
{
margin-bottom: 2.5rem;
}
mino-board > svg
{
margin-right: 16px;
margin-top: 8px;
margin-bottom: 8px;
}
</style>
</head>
<body>
<noscript><p>This page uses JavaScript to render diagrams.</p></noscript>
<main>
<h1>Ultimate simplified Jigsaw loop</h1>
<p>
This is the Jigsaw DPC loop distilled to the absolute bare minimum needed to reliably complete 14-line, 5-bag PC loops. You are guaranteed to get at least two perfect clears every 14 lines, as long as you don't mess up. The patterns were found by stickmancomic.
</p>
<p>
This simplified Jigsaw loop can be gradually expanded towards "full" Jigsaw, one of the most popular methods for claiming high ranks on the TETR.IO Blitz and Jstris Ultra leaderboards. This is unlike <a href='https://harddrop.com/wiki/Crowbar'>Crowbar v1</a> (another easy 14-line PC loop) or <a href='https://tetrisopener.wicurio.com/index.php?ET%E7%A0%B2'>ET Cannon</a> (also a 14-line loop, but not easy), which are dead ends that can't be improved much further.
</p>
<section>
<h2>Bag 1</h2>
<p>
At least one of these four patterns can be built (Z<T, S<T, TS<Z, TZ<S respectively). These lead to the same resulting field.
</p>
<mino-board>
ILLLT_____
ILZTT_____
IZZSSOOJJJ
IZSSTOO__J
</mino-board>
<mino-board>
_____TJJJI
_____TTSJI
LLLOOZZSSI
L__OOTZZSI
</mino-board>
<br>
<mino-board>
IZZLL_____
ITZZL_____
ITTSSOOJJJ
ITSSLOO__J
</mino-board>
<mino-board>
_____JJSSI
_____JSSTI
LLLOOZZTTI
L__OOJZZTI
</mino-board>
<br>
<mino-board>
XXXXX_____
XXXXX_____
XXXXXXX__X
</mino-board>
<mino-board>
_____XXXXX
_____XXXXX
X__XXXXXXX
</mino-board>
<p>
If multiple choices are available, prefer the first two because they give an extra t-spin. The t-spin can also sometimes be delayed to upgrade it to a t-spin single.
</p>
</section>
<section>
<h2>Bag 2</h2>
<p>
At least one of these two patterns can be built. The second one is only rarely needed (IO<Z<L, 1/12 chance). These lead to the same resulting field.
</p>
<mino-board>
T___J_____
TTSSJ_____
TSSJJ_IIII
XXXXXLLLOO
XXXXXLZZOO
XXXXXXXZZX
</mino-board>
<mino-board>
T___J_____
TTSSJ_____
TSSJJ_ZZOO
XXXXXLLLOO
XXXXXLIIII
XXXXXXXZZX
</mino-board>
<br>
<mino-board>
X___X_____
XXXXX_____
XXXXX_XXXX
</mino-board>
<p>
Look out for a potential PC with the first pattern (doable roughly 10% of the time).
</p>
</section>
<section>
<h2>Bag 3</h2>
<p>
At least one of these two patterns can be built (O<J or O<L, JL<O respectively), and guarantee a perfect clear with the S piece unused.
</p>
<mino-board>
ZZTTTIJJLL
XZZTXIJOOL
XXXXXIJOOL
XXXXXIXXXX
</mino-board>
<mino-board>
ZZTTTILOOJ
XZZTXILOOJ
XXXXXILLJJ
XXXXXIXXXX
</mino-board>
</section>
<section>
<h2>Bag 4 (+ bag 3 leftover)</h2>
<p>
At least one of these two patterns can be built (Z<J, J<Z respectively), and lead to the same resulting field. Place bag 3's S piece in the corner first.
</p>
<mino-board>
I_________
IOO_______
IOO_S_LJJJ
ISSTSSLZZJ
SSTTTSLLZZ
</mino-board>
<mino-board>
I_________
IOO_______
IOO_S_ZZLL
ISSTSSJZZL
SSTTTSJJJL
</mino-board>
<br>
<mino-board>
X_________
XXX_______
XXX_X_XXXX
</mino-board>
</section>
<section>
<h2>Bag 5</h2>
<p>
At least one of these two patterns can be built (O<J or O<L, JL<O respectively), and guarantee a perfect clear. Congratulations, you have completed a PC loop!
</p>
<mino-board>
TTTSSIJJLL
XTSSZIJOOL
XXXZZIJOOL
XXXZXIXXXX
</mino-board>
<mino-board>
TTTSSILOOJ
XTSSZILOOJ
XXXZZILLJJ
XXXZXIXXXX
</mino-board>
</section>
<section>
<h2>Optimising for score</h2>
<p>
Here are some things you can learn to improve the scoring prospects of this loop.
</p>
<section>
<h3>Bag 3</h3>
<p>
Learn the other <a href='second-pc.html#tub-plus-horizontal-i'>tub + I 2nd PC solves</a>. Besides the two solves shown above, there are six more solves that can be used to increase the chance of getting a tetris PC (from 2/7 to 4/7) and the chance of saving O going into the next bag.
</p>
</section>
<section>
<h3>Bags 4 and 5</h3>
<p>
Learn DPC for extra S/Z and extra O. (At the time of writing, there is no good up-to-date resource on DPC that is not a <a href='https://www.youtube.com/watch?v=bG242y1XIjs'>video</a>.)
</p>
<p>
One of the extra-S/Z setups is kinda nasty (extra S, S before O, aka "lime DPC"). You may, optionally, continue using the setup shown here as a fallback.
</p>
</section>
<section>
<h3>Bag 2</h3>
<p>
Learn the other <a href='https://docs.google.com/document/d/13EGXMdc4s_zRhp9VFD7Wq8VhLhAj_6MA4Cge0pvo0m8/edit'>Jigsaw perfect clear solves</a>. You will also need to learn the accompanying 2nd PC cases that can result from them, as well as the remaining DPC cases (I, T, and J/L).
</p>
</section>
</section>
</main>
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