diff --git a/frontend-sba/components/Gameplay/XCheckWizard.vue b/frontend-sba/components/Gameplay/XCheckWizard.vue
new file mode 100644
index 0000000..85b0e55
--- /dev/null
+++ b/frontend-sba/components/Gameplay/XCheckWizard.vue
@@ -0,0 +1,506 @@
+<template>
+  <div class="x-check-wizard" :class="{ 'read-only': readonly }">
+    <!-- Header -->
+    <div class="wizard-header">
+      <h3 class="wizard-title">
+        X-Check: {{ xCheckData.position }} ({{ getPositionName(xCheckData.position) }})
+      </h3>
+      <p v-if="readonly" class="waiting-message">
+        Waiting for opponent to select result...
+      </p>
+    </div>
+
+    <!-- Dice Display -->
+    <div class="dice-display">
+      <div class="dice-group">
+        <div class="dice-label">Range Roll (d20)</div>
+        <div class="dice-value d20">{{ xCheckData.d20_roll }}</div>
+      </div>
+      <div class="dice-group">
+        <div class="dice-label">Error Roll (3d6)</div>
+        <div class="dice-value d6">
+          {{ xCheckData.d6_total }}
+          <span class="dice-breakdown">({{ xCheckData.d6_individual.join(' + ') }})</span>
+        </div>
+      </div>
+    </div>
+
+    <!-- SPD d20 (click to reveal if present) -->
+    <div v-if="xCheckData.spd_d20 !== null" class="spd-container">
+      <button
+        v-if="!spdRevealed"
+        class="spd-reveal-button"
+        :disabled="readonly"
+        @click="spdRevealed = true"
+      >
+        <svg class="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
+        </svg>
+        Tap to Reveal SPD d20
+      </button>
+      <div v-else class="spd-revealed">
+        <div class="dice-label">Speed Check d20</div>
+        <div class="dice-value d20">{{ xCheckData.spd_d20 }}</div>
+      </div>
+    </div>
+
+    <!-- Defensive Positioning Note -->
+    <div v-if="defensivePositioningNote" class="positioning-note">
+      <svg class="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
+      </svg>
+      {{ defensivePositioningNote }}
+    </div>
+
+    <!-- Chart Row Selection -->
+    <div class="chart-selection">
+      <h4 class="selection-title">Select Range Result</h4>
+      <div class="chart-row">
+        <button
+          v-for="(resultCode, index) in xCheckData.chart_row"
+          :key="index"
+          class="chart-column"
+          :class="{
+            selected: selectedColumn === index && !showHashChoice && !showSpdChoice,
+            disabled: readonly,
+          }"
+          :disabled="readonly"
+          @click="selectColumn(index, resultCode)"
+        >
+          <div class="column-header">Range {{ index + 1 }}</div>
+          <div class="column-result">{{ resultCode }}</div>
+          <div class="column-label">{{ getResultLabel(resultCode) }}</div>
+        </button>
+      </div>
+    </div>
+
+    <!-- Hash Result Sub-Choice (G2#/G3# → G2 or SI2) -->
+    <div v-if="showHashChoice" class="sub-choice">
+      <h4 class="sub-choice-title">Speed Test Result</h4>
+      <p class="sub-choice-description">
+        Check batter's speed rating on their card. Did they pass the speed test?
+      </p>
+      <div class="sub-choice-buttons">
+        <button
+          v-for="option in hashOptions"
+          :key="option"
+          class="sub-choice-button"
+          :class="{ selected: selectedResult === option }"
+          :disabled="readonly"
+          @click="selectHashResult(option)"
+        >
+          <div class="option-code">{{ option }}</div>
+          <div class="option-label">{{ getResultLabel(option) }}</div>
+        </button>
+      </div>
+    </div>
+
+    <!-- SPD Result Sub-Choice -->
+    <div v-if="showSpdChoice" class="sub-choice">
+      <h4 class="sub-choice-title">Speed Check</h4>
+      <p class="sub-choice-description">
+        Check batter's speed rating vs. the d20 roll. Safe or out?
+      </p>
+      <div class="sub-choice-buttons">
+        <button
+          class="sub-choice-button"
+          :class="{ selected: selectedResult === 'G3' }"
+          :disabled="readonly"
+          @click="selectSpdResult('G3')"
+        >
+          <div class="option-code">G3</div>
+          <div class="option-label">Out (failed check)</div>
+        </button>
+        <button
+          class="sub-choice-button"
+          :class="{ selected: selectedResult === 'SI1' }"
+          :disabled="readonly"
+          @click="selectSpdResult('SI1')"
+        >
+          <div class="option-code">SI1</div>
+          <div class="option-label">Safe (passed check)</div>
+        </button>
+      </div>
+    </div>
+
+    <!-- Error Selection -->
+    <div class="error-selection">
+      <h4 class="selection-title">Select Error Result</h4>
+      <p class="selection-description">
+        Check defender's error rating on their card based on 3d6 total ({{ xCheckData.d6_total }})
+      </p>
+      <div class="error-row">
+        <button
+          v-for="errorCode in ERROR_OPTIONS"
+          :key="errorCode"
+          class="error-button"
+          :class="{
+            selected: selectedError === errorCode,
+            disabled: readonly,
+            'no-error': errorCode === 'NO',
+          }"
+          :disabled="readonly"
+          @click="selectError(errorCode)"
+        >
+          <div class="error-code">{{ errorCode }}</div>
+          <div class="error-label">{{ getErrorLabel(errorCode) }}</div>
+        </button>
+      </div>
+    </div>
+
+    <!-- Submit Button -->
+    <div class="wizard-actions">
+      <button
+        class="submit-button"
+        :disabled="!canSubmit || readonly"
+        @click="handleSubmit"
+      >
+        <svg v-if="!readonly" class="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7" />
+        </svg>
+        {{ readonly ? 'Waiting...' : 'Submit Result' }}
+      </button>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed } from 'vue'
+import type { XCheckData } from '~/types/game'
+import {
+  getResultLabel,
+  getErrorLabel,
+  isHashResult,
+  isSpdResult,
+  getHashConversions,
+} from '~/constants/xCheckResults'
+
+interface Props {
+  xCheckData: XCheckData
+  readonly: boolean
+}
+
+const props = defineProps<Props>()
+
+const emit = defineEmits<{
+  submit: [payload: { resultCode: string; errorResult: string }]
+}>()
+
+// State
+const selectedColumn = ref<number | null>(null)
+const selectedResult = ref<string | null>(null)
+const selectedError = ref<string>('NO') // Default to no error
+const showHashChoice = ref(false)
+const showSpdChoice = ref(false)
+const hashOptions = ref<string[]>([])
+const spdRevealed = ref(false)
+
+const ERROR_OPTIONS = ['NO', 'E1', 'E2', 'E3', 'RP']
+
+// Position name mapping
+const POSITION_NAMES: Record<string, string> = {
+  P: 'Pitcher',
+  C: 'Catcher',
+  '1B': 'First Base',
+  '2B': 'Second Base',
+  '3B': 'Third Base',
+  SS: 'Shortstop',
+  LF: 'Left Field',
+  CF: 'Center Field',
+  RF: 'Right Field',
+}
+
+function getPositionName(position: string): string {
+  return POSITION_NAMES[position] || position
+}
+
+// Defensive positioning note (if applicable)
+const defensivePositioningNote = computed(() => {
+  // TODO: Get from game state - check if playing in affects range
+  // For now, just return null
+  return null
+})
+
+// Selection handlers
+function selectColumn(index: number, resultCode: string) {
+  if (props.readonly) return
+
+  selectedColumn.value = index
+
+  // Check if this is a hash result (G2#/G3#)
+  if (isHashResult(resultCode)) {
+    const conversions = getHashConversions(resultCode)
+    if (conversions) {
+      showHashChoice.value = true
+      showSpdChoice.value = false
+      hashOptions.value = conversions
+      selectedResult.value = null // Reset until player picks
+    }
+  }
+  // Check if this is SPD
+  else if (isSpdResult(resultCode)) {
+    showSpdChoice.value = true
+    showHashChoice.value = false
+    selectedResult.value = null // Reset until player picks
+  }
+  // Simple result - select immediately
+  else {
+    showHashChoice.value = false
+    showSpdChoice.value = false
+    selectedResult.value = resultCode
+  }
+}
+
+function selectHashResult(option: string) {
+  if (props.readonly) return
+  selectedResult.value = option
+  showHashChoice.value = false
+}
+
+function selectSpdResult(option: string) {
+  if (props.readonly) return
+  selectedResult.value = option
+  showSpdChoice.value = false
+}
+
+function selectError(errorCode: string) {
+  if (props.readonly) return
+  selectedError.value = errorCode
+}
+
+// Can submit when both result and error are selected
+const canSubmit = computed(() => {
+  return selectedResult.value !== null && selectedError.value !== null
+})
+
+function handleSubmit() {
+  if (!canSubmit.value || props.readonly) return
+
+  emit('submit', {
+    resultCode: selectedResult.value!,
+    errorResult: selectedError.value,
+  })
+}
+</script>
+
+<style scoped>
+.x-check-wizard {
+  @apply bg-white rounded-lg shadow-lg p-6 space-y-6 max-w-4xl mx-auto;
+}
+
+.x-check-wizard.read-only {
+  @apply opacity-75;
+}
+
+/* Header */
+.wizard-header {
+  @apply text-center pb-4 border-b border-gray-200;
+}
+
+.wizard-title {
+  @apply text-2xl font-bold text-gray-900;
+}
+
+.waiting-message {
+  @apply mt-2 text-sm text-orange-600 font-medium;
+}
+
+/* Dice Display */
+.dice-display {
+  @apply flex justify-center gap-8;
+}
+
+.dice-group {
+  @apply text-center;
+}
+
+.dice-label {
+  @apply text-sm font-medium text-gray-600 mb-2;
+}
+
+.dice-value {
+  @apply text-4xl font-bold rounded-lg px-6 py-3 shadow-md;
+}
+
+.dice-value.d20 {
+  @apply bg-blue-100 text-blue-900;
+}
+
+.dice-value.d6 {
+  @apply bg-green-100 text-green-900;
+}
+
+.dice-breakdown {
+  @apply text-lg text-gray-600 ml-2;
+}
+
+/* SPD Container */
+.spd-container {
+  @apply text-center py-4 bg-yellow-50 rounded-lg border-2 border-yellow-200;
+}
+
+.spd-reveal-button {
+  @apply inline-flex items-center gap-2 px-6 py-3 bg-yellow-500 text-white font-semibold rounded-lg hover:bg-yellow-600 transition-colors disabled:opacity-50 disabled:cursor-not-allowed;
+}
+
+.spd-revealed {
+  @apply space-y-2;
+}
+
+/* Positioning Note */
+.positioning-note {
+  @apply flex items-center gap-2 px-4 py-2 bg-blue-50 text-blue-800 rounded-lg text-sm;
+}
+
+/* Chart Selection */
+.chart-selection {
+  @apply space-y-4;
+}
+
+.selection-title {
+  @apply text-lg font-semibold text-gray-900;
+}
+
+.selection-description {
+  @apply text-sm text-gray-600;
+}
+
+.chart-row {
+  @apply grid grid-cols-5 gap-3;
+}
+
+.chart-column {
+  @apply flex flex-col items-center p-4 border-2 border-gray-300 rounded-lg hover:border-blue-500 hover:bg-blue-50 transition-all cursor-pointer disabled:cursor-not-allowed disabled:opacity-50;
+}
+
+.chart-column.selected {
+  @apply border-blue-600 bg-blue-100 ring-2 ring-blue-500;
+}
+
+.chart-column.disabled {
+  @apply hover:border-gray-300 hover:bg-white;
+}
+
+.column-header {
+  @apply text-xs font-medium text-gray-500 mb-1;
+}
+
+.column-result {
+  @apply text-2xl font-bold text-gray-900 mb-1;
+}
+
+.column-label {
+  @apply text-xs text-gray-600 text-center;
+}
+
+/* Sub-Choice */
+.sub-choice {
+  @apply p-6 bg-gradient-to-br from-purple-50 to-blue-50 rounded-lg border-2 border-purple-300 space-y-4;
+}
+
+.sub-choice-title {
+  @apply text-lg font-bold text-purple-900;
+}
+
+.sub-choice-description {
+  @apply text-sm text-gray-700;
+}
+
+.sub-choice-buttons {
+  @apply flex gap-4 justify-center;
+}
+
+.sub-choice-button {
+  @apply flex flex-col items-center p-6 border-2 border-purple-300 rounded-lg hover:border-purple-600 hover:bg-purple-100 transition-all cursor-pointer min-w-[150px] disabled:cursor-not-allowed disabled:opacity-50;
+}
+
+.sub-choice-button.selected {
+  @apply border-purple-700 bg-purple-200 ring-2 ring-purple-600;
+}
+
+.option-code {
+  @apply text-3xl font-bold text-purple-900 mb-2;
+}
+
+.option-label {
+  @apply text-sm text-gray-700 text-center;
+}
+
+/* Error Selection */
+.error-selection {
+  @apply space-y-4;
+}
+
+.error-row {
+  @apply flex gap-3 justify-center flex-wrap;
+}
+
+.error-button {
+  @apply flex flex-col items-center px-6 py-4 border-2 border-gray-300 rounded-lg hover:border-red-500 hover:bg-red-50 transition-all cursor-pointer min-w-[100px] disabled:cursor-not-allowed disabled:opacity-50;
+}
+
+.error-button.selected {
+  @apply border-red-600 bg-red-100 ring-2 ring-red-500;
+}
+
+.error-button.no-error {
+  @apply border-green-300 hover:border-green-500 hover:bg-green-50;
+}
+
+.error-button.no-error.selected {
+  @apply border-green-600 bg-green-100 ring-2 ring-green-500;
+}
+
+.error-code {
+  @apply text-xl font-bold text-gray-900 mb-1;
+}
+
+.error-label {
+  @apply text-xs text-gray-600 text-center;
+}
+
+/* Actions */
+.wizard-actions {
+  @apply pt-4 border-t border-gray-200;
+}
+
+.submit-button {
+  @apply w-full inline-flex items-center justify-center gap-2 px-6 py-4 bg-blue-600 text-white font-bold text-lg rounded-lg hover:bg-blue-700 transition-colors disabled:opacity-50 disabled:cursor-not-allowed disabled:bg-gray-400;
+}
+
+/* Mobile Responsive */
+@media (max-width: 768px) {
+  .x-check-wizard {
+    @apply p-4 space-y-4;
+  }
+
+  .dice-display {
+    @apply flex-col gap-4;
+  }
+
+  .chart-row {
+    @apply grid-cols-2 gap-2;
+  }
+
+  .chart-column {
+    @apply p-3;
+  }
+
+  .column-result {
+    @apply text-xl;
+  }
+
+  .error-row {
+    @apply grid grid-cols-3 gap-2;
+  }
+
+  .error-button {
+    @apply px-4 py-3 min-w-0;
+  }
+
+  .sub-choice-buttons {
+    @apply flex-col;
+  }
+}
+</style>
diff --git a/frontend-sba/constants/xCheckResults.ts b/frontend-sba/constants/xCheckResults.ts
new file mode 100644
index 0000000..4366570
--- /dev/null
+++ b/frontend-sba/constants/xCheckResults.ts
@@ -0,0 +1,87 @@
+/**
+ * X-Check Result Code Labels and Descriptions
+ *
+ * Display labels for all possible result codes that can appear in
+ * defensive x-check chart rows (5 columns).
+ */
+
+export const X_CHECK_RESULT_LABELS: Record<string, string> = {
+  // Groundball results
+  G1: 'Groundball Out (best)',
+  G2: 'Groundball Out (good)',
+  G3: 'Groundball Out (weak)',
+  'G2#': 'Groundball (speed test)',
+  'G3#': 'Groundball (speed test)',
+
+  // Singles
+  SI1: 'Single (clean)',
+  SI2: 'Single (through)',
+
+  // Doubles
+  DO2: 'Double (2-base)',
+  DO3: 'Double (3-base)',
+
+  // Triples
+  TR3: 'Triple',
+
+  // Flyball results
+  F1: 'Flyout (deep)',
+  F2: 'Flyout (medium)',
+  F3: 'Flyout (shallow)',
+
+  // Catcher-specific
+  SPD: 'Speed Check',
+  FO: 'Fly Out',
+  PO: 'Pop Out',
+}
+
+export const X_CHECK_ERROR_LABELS: Record<string, string> = {
+  NO: 'No Error',
+  E1: 'Error (+1 base)',
+  E2: 'Error (+2 bases)',
+  E3: 'Error (+3 bases)',
+  RP: 'Rare Play (+3 bases)',
+}
+
+/**
+ * Hash result conversions (player mentally resolves based on batter speed)
+ */
+export const HASH_CONVERSIONS: Record<string, string[]> = {
+  'G2#': ['G2', 'SI2'],
+  'G3#': ['G3', 'SI2'],
+}
+
+/**
+ * Get display label for a result code
+ */
+export function getResultLabel(code: string): string {
+  return X_CHECK_RESULT_LABELS[code] || code
+}
+
+/**
+ * Get display label for an error result
+ */
+export function getErrorLabel(code: string): string {
+  return X_CHECK_ERROR_LABELS[code] || code
+}
+
+/**
+ * Check if a result code is a hash result (requires speed test)
+ */
+export function isHashResult(code: string): boolean {
+  return code.endsWith('#')
+}
+
+/**
+ * Check if a result code is SPD (speed check)
+ */
+export function isSpdResult(code: string): boolean {
+  return code === 'SPD'
+}
+
+/**
+ * Get conversion options for a hash result
+ */
+export function getHashConversions(code: string): string[] | null {
+  return HASH_CONVERSIONS[code] || null
+}