Checkmate in 13. Today’s tsume is with all pieces on board because I got it studying a real opening position.
Difficulty ★★★★★ Checkmate in 35 moves! This checkmate problem is from a real position between Habu and Satou played 20 years ago. Satou played P-88+ and Habu started a 35 moves checkmate sequence!
Difficulty ★★☆☆☆ Checkmate in 5
Difficulty ★★★☆☆ Checkmate in 7
Difficulty ★★★☆☆ Checkmate in 11