3-GPU overnight self-play: 3090 Ti + 2080 Ti + RTX 4000

Round-robin load balancing across three Ollama instances:
- 141:11434 (RTX 3090 Ti 24GB)
- 141:11435 (RTX 2080 Ti 11GB) — new second instance
- 179:11434 (RTX 4000 16GB)

Each tier cycles to a different GPU. 3x throughput overnight.
Cycles: Tier 1 drills → Tier 2 self-critique → Tier 3 adversarial → repeat

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

training/scripts/overnight_selfplay.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+# overnight_selfplay.sh — Run 3-tier self-play overnight on dev server
+# Cycles: Tier 1 (1hr) → Tier 2 (1hr) → Tier 3 (1hr) → repeat
+#
+# Usage: nohup ./overnight_selfplay.sh > /var/log/selfplay_overnight.log 2>&1 &
+#
+# Kill with: pkill -f overnight_selfplay
+
+MODEL="${1:-mortdecai-v4}"
+RCON_HOST="${2:-192.168.0.244}"
+RCON_PORT="${3:-25578}"
+ROUNDS_PER_TIER=20  # ~20 rounds per hour at ~3min/round
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+# Load balance between three Ollama instances / GPUs
+OLLAMA_URLS=("http://192.168.0.141:11434" "http://192.168.0.141:11435" "http://192.168.0.179:11434")
+# 141:11434 = RTX 3090 Ti (24GB)
+# 141:11435 = RTX 2080 Ti (11GB)
+# 179:11434 = RTX 4000 (16GB)
+URL_IDX=0
+
+next_ollama() {
+    OLLAMA_URL="${OLLAMA_URLS[$URL_IDX]}"
+    URL_IDX=$(( (URL_IDX + 1) % ${#OLLAMA_URLS[@]} ))
+}
+
+echo "=== Mortdecai Overnight Self-Play ==="
+echo "Model: $MODEL"
+echo "Ollama instances: ${OLLAMA_URLS[*]}"
+echo "RCON: $RCON_HOST:$RCON_PORT"
+echo "Rounds per tier: $ROUNDS_PER_TIER"
+echo "Cycle: Tier 1 (drills) → Tier 2 (self-critique) → Tier 3 (adversarial) → repeat"
+echo "Started: $(date)"
+echo "============================================"
+
+CYCLE=0
+while true; do
+    CYCLE=$((CYCLE + 1))
+    echo ""
+    echo "=== CYCLE $CYCLE — $(date) ==="
+
+    for TIER in 1 2 3; do
+        next_ollama
+        TIER_NAMES=("" "Command Drills" "Self-Critique" "Adversarial")
+        echo "--- Tier $TIER: ${TIER_NAMES[$TIER]} (using $OLLAMA_URL) ---"
+        python3 "$SCRIPT_DIR/self_play.py" \
+            --model "$MODEL" \
+            --ollama-url "$OLLAMA_URL" \
+            --rcon-host "$RCON_HOST" \
+            --rcon-port "$RCON_PORT" \
+            --tier "$TIER" \
+            --rounds "$ROUNDS_PER_TIER" \
+            --output "$SCRIPT_DIR/../../data/processed/self_play.jsonl"
+        echo "Tier $TIER done: $(date)"
+    done
+
+    echo "=== CYCLE $CYCLE COMPLETE — $(date) ==="
+    echo "Self-play data: $(wc -l < "$SCRIPT_DIR/../../data/processed/self_play.jsonl" 2>/dev/null || echo 0) examples"
+done