Sleeping on Brushwood, Tasting Gall 卧薪尝胆

✓ Engine-verifiedBook result: Red winsMate in 15適情雅趣

📚 Shiqing Yaqu — the famous Ming-dynasty collection of entertaining endgame compositions

楚河漢界cotuong.synerworlds.com將士馬士俥象砲砲俥象傌相兵馬車相卒帥cotuong.synerworlds.com

Red to move and checkmate in 15 — one of the longest solutions you will find in this dictionary. Red has two Rooks, two Cannons, a Knight and both Elephants; Black is down to one Rook, two Knights and a full palace guard. Red is clearly stronger, yet the road to mate stretches out like a long campaign: every move demands patience, and haste is fatal. The position comes from the classical manual Thích Tình Nhã Thú (No. 48) and is named after King Câu Tiễn, who for twenty years tasted a bitter gall bladder at every meal so he would never forget the humiliation of Cối Kê. How the old tale mirrors this 15-move solution is hinted at in this page's Anecdotes section. In your view, what is hardest about solving a 15-move position: calculating far, or staying patient all the way to the final move?

✓ Engine-verified — The Fairy-Stockfish engine (NNUE) confirms Red checkmates in 15 moves — the main line was checked move by move, every move legal. Date checked: 2026-11-03.

📖 Anecdotes

한 왕이 식탁 위에 쓴 쓸개를 걸어 놓고 20년을 매일 맛보았다

한 왕이 자기 자리 바로 위에 쓴 쓸개를 걸어 놓고, 매 끼니마다 한 조각을 맛보며 큰 소리로 물었다. “회계의 수치를 잊었느냐?” 건강 때문이 아니었다. 결코 잊지 못하게 하기 위해서였다. 그는 월왕 구천이었다. 기원전 494년 그는 회계에서 오왕 부차에게 패해 항복해야 했고, 범려와 함께 오나라에서 3년을 종으로 살며 말을 돌보고 주인을 모셨다. 『오월춘추』는 충격적인 세부까지 전한다. 구천이 부차의 대변을 맛보며 그의 병을 ‘진단’해, 자신이 길들여졌다고 부차를 믿게 만들어 풀려났다는 것이다. 고향으로 돌아온 구천은 섶에…

— Đội ngũ SynerWorlds

Stories around this position — storytelling, not part of the engine-verified content.

Source
適情雅趣 第48局
Book result
Red wins
Verification
✓ Engine-verified
Side to move
Red to move
Difficulty
Hard
Red forces
King, Elephant ×2, Horse, Chariot ×2, Cannon ×2, Pawn
Black forces
King, Advisor ×2, Elephant ×2, Horse ×2, Chariot, Pawn
FEN
3k1a1n1/4aR3/4b1C2/4C1R2/2b1N4/2B6/2P6/2nrB4/5p3/4K4 w

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Solution