diff --git a/custom_formats/HDR10 (Missing).yml b/custom_formats/HDR10 (Missing).yml
index e9b4fea..f4b81fc 100644
--- a/custom_formats/HDR10 (Missing).yml	
+++ b/custom_formats/HDR10 (Missing).yml	
@@ -24,19 +24,24 @@ conditions:
   pattern: HDR10 (Missing Groups)
   required: true
   type: release_title
+- name: Not SDR
+  negate: true
+  pattern: SDR
+  required: true
+  type: release_title
 tests:
 - conditionResults:
   - matches: false
     name: Not HDR10
     negate: true
     pattern: HDR10
-    required: false
+    required: true
     type: release_title
   - matches: false
     name: Not HDR10+
     negate: true
     pattern: HDR10+
-    required: false
+    required: true
     type: release_title
   - matches: true
     name: Missing Groups
@@ -44,23 +49,29 @@ tests:
     pattern: HDR10 (Missing Groups)
     required: true
     type: release_title
+  - matches: false
+    name: Not SDR
+    negate: true
+    pattern: SDR
+    required: true
+    type: release_title
   expected: true
   id: 1
   input: Barbie 2023 UHD BluRay 2160p TrueHD Atmos 7.1 DV HEVC HYBRID REMUX-FraMeSToR
-  lastRun: '2024-12-13T09:50:00.736356'
+  lastRun: '2025-01-11T22:58:21.736014'
   passes: true
 - conditionResults:
   - matches: true
     name: Not HDR10
     negate: true
     pattern: HDR10
-    required: false
+    required: true
     type: release_title
   - matches: false
     name: Not HDR10+
     negate: true
     pattern: HDR10+
-    required: false
+    required: true
     type: release_title
   - matches: true
     name: Missing Groups
@@ -68,9 +79,46 @@ tests:
     pattern: HDR10 (Missing Groups)
     required: true
     type: release_title
+  - matches: false
+    name: Not SDR
+    negate: true
+    pattern: SDR
+    required: true
+    type: release_title
   expected: false
   id: 2
   input: Barbie (2023) 2160p UHD BluRay Hybrid REMUX HEVC DV HDR TrueHD Atmos 7.1
     English-FraMeSToR
-  lastRun: '2024-12-13T09:50:00.736356'
+  lastRun: '2025-01-11T22:58:21.736014'
+  passes: true
+- conditionResults:
+  - matches: false
+    name: Not HDR10
+    negate: true
+    pattern: HDR10
+    required: true
+    type: release_title
+  - matches: false
+    name: Not HDR10+
+    negate: true
+    pattern: HDR10+
+    required: true
+    type: release_title
+  - matches: true
+    name: Missing Groups
+    negate: false
+    pattern: HDR10 (Missing Groups)
+    required: true
+    type: release_title
+  - matches: true
+    name: Not SDR
+    negate: true
+    pattern: SDR
+    required: true
+    type: release_title
+  expected: false
+  id: 3
+  input: "For a Few Dollars More aka Per qualche dollaro in pi\xF9 1965 UHD BluRay\
+    \ 2160p DTS-HD MA 5.1 SDR HEVC REMUX-FraMeSToR"
+  lastRun: '2025-01-11T22:58:21.736014'
   passes: true
diff --git a/regex_patterns/SDR.yml b/regex_patterns/SDR.yml
new file mode 100644
index 0000000..d90b3b1
--- /dev/null
+++ b/regex_patterns/SDR.yml
@@ -0,0 +1,27 @@
+name: SDR
+pattern: \bSDR\b
+description: 'Explicitly matches labelled Standard Dynamic Range, i.e. "SDR" '
+tags:
+- HDR
+tests:
+- expected: true
+  id: 1
+  input: Yojimbo.1961.REPACK.2160p.UHD.Blu-ray.Remux.SDR.HEVC.FLAC.1.0-CiNEPHiLES.mkv
+  lastRun: '2025-01-11T22:58:34.197378'
+  matchSpan:
+    end: 47
+    start: 44
+  matchedContent: SDR
+  matchedGroups: []
+  passes: true
+- expected: true
+  id: 2
+  input: "For a Few Dollars More aka Per qualche dollaro in pi\xF9 1965 UHD BluRay\
+    \ 2160p DTS-HD MA 5.1 SDR HEVC REMUX-FraMeSToR"
+  lastRun: '2025-01-11T22:58:34.197378'
+  matchSpan:
+    end: 93
+    start: 90
+  matchedContent: SDR
+  matchedGroups: []
+  passes: true