VPH Compact Go Game Set with Frame - 0.8'' Bamboo Reversible 19x19 Board, Old Yunzi Single-Convex Stones & Spruce Wood Jars

1. About the Set This is a professional-grade floor board Go set featuring: ①Reversible moso bamboo board with dual surfaces: Go side: 19×19 standard grid Xiangqi side: Traditional Chinese chess pattern ②Natural material construction: ⑴Vertical-grain moso bamboo with laser-etched lines (0.15mm precision) ⑵Carbonized surface treatment for enhanced durability ③Spruce wood containers with exposed growth rings for rustic elegance

2. Board & Container Specifications ①Floor board dimensions: 20.9"×19.7"×4.13" (L×W×H) ②Playing surface: 18.5"×17.3"×0.98" ③Grid unit size: 0.94"×0.86" ④Spruce containers: 5.7"H ×3.7"Ø

3. Single-Convex Vintage Yunzi Stones 361 tournament-grade stones (181B/180W) featuring: ①Traditional craftsmanship: ⑴12-step manual production process: 1.Material selection 2.Formula compounding 3.High-temperature melting (1,900°F) 4.Hand-dropped forming 5.72-hour gradual annealing 6.Wet-stone polishing 7.Ultrasonic cleaning 8.Visual grading 9.Final inspection 10.Wax-sealed packaging ②Aesthetic characteristics: ⑴Black stones: Jet-black with jade undertones ⑵White stones: Warm ivory hue ⑶Dimensions: 0.83"Ø ×0.24"H

4. Key Advantages ①EGF Certified: Official equipment of the European Go Federation ②Dual functionality: Suitable for both professional tournaments and casual play ③Social catalyst: Ideal for family gatherings and friendly competitions

5. Historical Legacy of Yunzi ①Early 20th Century: Original production techniques nearly lost ②1960s Revival: Government-initiated restoration project ③1974-1975: Research team at Kunming No.12 Middle School successfully replicated "Yongchang Chess" formula ④1980: Establishment of Yunnan Weiqi Factory for mass production ⑤Diplomatic Milestones: ⑴1986: Gifted to Japanese PM Yasuhiro Nakasone ⑵Presented to Queen Elizabeth II of England