![Mona Caïssa on Twitter: "#chess #chessproblem #ChessStudy #chesscomposition #шахматы 🇬🇧 [191-Solution] 5# (1/2) 1.Ba8!! Bf2 (only move to avoid Rf1#) 2.Bxf2 (Rxf2? Kg1!) With 5 rook-opposition variations: 2…Rxh7 3.Rb8! (menace Rb1#) Rb7 Mona Caïssa on Twitter: "#chess #chessproblem #ChessStudy #chesscomposition #шахматы 🇬🇧 [191-Solution] 5# (1/2) 1.Ba8!! Bf2 (only move to avoid Rf1#) 2.Bxf2 (Rxf2? Kg1!) With 5 rook-opposition variations: 2…Rxh7 3.Rb8! (menace Rb1#) Rb7](https://pbs.twimg.com/media/Ff1P68bX0AItZZe.jpg)
Mona Caïssa on Twitter: "#chess #chessproblem #ChessStudy #chesscomposition #шахматы 🇬🇧 [191-Solution] 5# (1/2) 1.Ba8!! Bf2 (only move to avoid Rf1#) 2.Bxf2 (Rxf2? Kg1!) With 5 rook-opposition variations: 2…Rxh7 3.Rb8! (menace Rb1#) Rb7
![Mona Caïssa on Twitter: "#chess #chessproblem #echecs #Étude #ChessStudy #chesscomposition #schach #шахматы [124] 🇫🇷Un Seeberger extraordinaire. Mat en 5. Solution la semaine prochaine (si je peux)... 🇬🇧An extraordinary Seeberger. Mate in 5. Mona Caïssa on Twitter: "#chess #chessproblem #echecs #Étude #ChessStudy #chesscomposition #schach #шахматы [124] 🇫🇷Un Seeberger extraordinaire. Mat en 5. Solution la semaine prochaine (si je peux)... 🇬🇧An extraordinary Seeberger. Mate in 5.](https://pbs.twimg.com/media/FRRK393XEAAlioS.jpg)
Mona Caïssa on Twitter: "#chess #chessproblem #echecs #Étude #ChessStudy #chesscomposition #schach #шахматы [124] 🇫🇷Un Seeberger extraordinaire. Mat en 5. Solution la semaine prochaine (si je peux)... 🇬🇧An extraordinary Seeberger. Mate in 5.
![Mona Caïssa on Twitter: "#chess #chessproblem #ChessStudy #chesscomposition #schach #шахматы 🇬🇧 [138-Solution] +- (1/2) 1.Qc1+ Ka4 2.Qc4! Qd8 (only move) 3.Qa6+ Qa5 (Kb3? 4.Qa2+ Kc3 5.Qc2+ Kd4 6.Qd2+ ~ 7.Qxd8 +-) 4.Nb6+! Mona Caïssa on Twitter: "#chess #chessproblem #ChessStudy #chesscomposition #schach #шахматы 🇬🇧 [138-Solution] +- (1/2) 1.Qc1+ Ka4 2.Qc4! Qd8 (only move) 3.Qa6+ Qa5 (Kb3? 4.Qa2+ Kc3 5.Qc2+ Kd4 6.Qd2+ ~ 7.Qxd8 +-) 4.Nb6+!](https://pbs.twimg.com/media/FUANmIYXwAAEPCW.jpg)
Mona Caïssa on Twitter: "#chess #chessproblem #ChessStudy #chesscomposition #schach #шахматы 🇬🇧 [138-Solution] +- (1/2) 1.Qc1+ Ka4 2.Qc4! Qd8 (only move) 3.Qa6+ Qa5 (Kb3? 4.Qa2+ Kc3 5.Qc2+ Kd4 6.Qd2+ ~ 7.Qxd8 +-) 4.Nb6+!
![An illustration of the knight task. The chess players were asked to... | Download Scientific Diagram An illustration of the knight task. The chess players were asked to... | Download Scientific Diagram](https://www.researchgate.net/publication/314279317/figure/fig2/AS:607173935656960@1521772955890/An-illustration-of-the-knight-task-The-chess-players-were-asked-to-rapidly-locate-the.png)