diff --git a/public/piece/mono/B.svg b/public/piece/mono/B.svg
index 277cdab7ab761..0abd87f4bd7b1 100644
--- a/public/piece/mono/B.svg
+++ b/public/piece/mono/B.svg
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/public/piece/mono/K.svg b/public/piece/mono/K.svg
index e0247b25e9620..dc46ea056d86c 100644
--- a/public/piece/mono/K.svg
+++ b/public/piece/mono/K.svg
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/public/piece/mono/N.svg b/public/piece/mono/N.svg
index 7cbba109a0e32..6167094cffc5f 100644
--- a/public/piece/mono/N.svg
+++ b/public/piece/mono/N.svg
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/public/piece/mono/P.svg b/public/piece/mono/P.svg
index d5ac3f9e994c4..16eb478c92615 100644
--- a/public/piece/mono/P.svg
+++ b/public/piece/mono/P.svg
@@ -1 +1 @@
-<svg height="45" width="45" xmlns="http://www.w3.org/2000/svg"><path d="m22 9c-2.21 0-4 1.79-4 4 0 .89.29 1.71.78 2.38-1.95 1.12-3.28 3.21-3.28 5.62 0 2.03.94 3.84 2.41 5.03-3 1.06-7.41 5.55-7.41 13.47h23c0-7.92-4.41-12.41-7.41-13.47 1.47-1.19 2.41-3 2.41-5.03 0-2.41-1.33-4.5-3.28-5.62.49-.67.78-1.49.78-2.38 0-2.21-1.79-4-4-4z" fill="#888" stroke="#888" stroke-linecap="round" stroke-width="1.5"/></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 45 45"><path fill="#888" stroke="#888" stroke-linecap="round" stroke-width="1.5" d="M22 9c-2.21 0-4 1.79-4 4 0 .89.29 1.71.78 2.38-1.95 1.12-3.28 3.21-3.28 5.62 0 2.03.94 3.84 2.41 5.03-3 1.06-7.41 5.55-7.41 13.47h23c0-7.92-4.41-12.41-7.41-13.47 1.47-1.19 2.41-3 2.41-5.03 0-2.41-1.33-4.5-3.28-5.62.49-.67.78-1.49.78-2.38 0-2.21-1.79-4-4-4z"/></svg>
\ No newline at end of file
diff --git a/public/piece/mono/Q.svg b/public/piece/mono/Q.svg
index 466e542758e67..6313174a74aaa 100644
--- a/public/piece/mono/Q.svg
+++ b/public/piece/mono/Q.svg
@@ -1 +1 @@
-<svg height="45" width="45" xmlns="http://www.w3.org/2000/svg"><g style="fill:#888;fill-rule:evenodd;stroke:#888;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round"><circle cx="6" cy="12" r="2.75"/><circle cx="14" cy="9" r="2.75"/><circle cx="22.5" cy="8" r="2.75"/><circle cx="31" cy="9" r="2.75"/><circle cx="39" cy="12" r="2.75"/><path d="m9 26c8.5-1.5 21-1.5 27 0l2.5-12.5-7.5 11.5-.3-14.1-5.2 13.6-3-14.5-3 14.5-5.2-13.6-.3 14.1-7.5-11.5z"/><path d="m9 26c0 2 1.5 2 2.5 4 1 1.5 1 1 .5 3.5-1.5 1-1.5 2.5-1.5 2.5-1.5 1.5.5 2.5.5 2.5 6.5 1 16.5 1 23 0 0 0 1.5-1 0-2.5 0 0 .5-1.5-1-2.5-.5-2.5-.5-2 .5-3.5 1-2 2.5-2 2.5-4-8.5-1.5-18.5-1.5-27 0z"/><path d="m11 38.5a35 35 1 0 0 23 0" fill="none"/></g></svg>
\ No newline at end of file
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diff --git a/public/piece/mono/R.svg b/public/piece/mono/R.svg
index 3816f8dc2a770..d9ab590170d0c 100644
--- a/public/piece/mono/R.svg
+++ b/public/piece/mono/R.svg
@@ -1 +1 @@
-<svg height="45" width="45" xmlns="http://www.w3.org/2000/svg"><path d="M9 39h27v-3H9zm3.5-7l1.5-2.5h17l1.5 2.5zm-.5 4v-4h21v4zm2-6.5v-13h17v13zm0-13L11 14h23l-3 2.5zM11 14V9h4v2h5V9h5v2h5V9h4v5z" fill="#888" fill-rule="evenodd" stroke="#888" stroke-width="1.5" stroke-linejoin="round"/></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 45 45"><path fill="#888" fill-rule="evenodd" stroke="#888" stroke-linejoin="round" stroke-width="1.5" d="M9 39h27v-3H9zm3.5-7 1.5-2.5h17l1.5 2.5zm-.5 4v-4h21v4zm2-6.5v-13h17v13zm0-13L11 14h23l-3 2.5zM11 14V9h4v2h5V9h5v2h5V9h4v5z"/></svg>
\ No newline at end of file