Mauricio Flores Rios is a grandmaster from Chile. He achieved the title at eighteen, and is a regular member of Chile's Olympad team. Mauricio combines his career as a chess player and trainer with his PhD studies in Mathematics at the University of Minnesota.

"There is also masses of stuff in the book that made me go ‘Oooh!' and ‘Aaah!' so I think it will have the same effect on you! In particular, I loved Rios' exposition of White's plan of exerting queenside pressure against Hedgehog systems. I'd seen one of the games he quotes in his chapter but I'd never remotely made any link to a structured way of fighting the Hedgehog structure, so this chapter was a real eye-opener for me…In conclusion, warmly recommended. Lots to learn!" - GM Matthew Sadler, New in Chess

Mauricio Flores Rios is a grandmaster from Chile. He achieved the title at eighteen, and is a regular member of Chile's Olympad team. Mauricio combines his career as a chess player and trainer with his PhD studies in Mathematics at the University of Minnesota.

"There is also masses of stuff in the book that made me go ‘Oooh!' and ‘Aaah!' so I think it will have the same effect on you! In particular, I loved Rios' exposition of White's plan of exerting queenside pressure against Hedgehog systems. I'd seen one of the games he quotes in his chapter but I'd never remotely made any link to a structured way of fighting the Hedgehog structure, so this chapter was a real eye-opener for me…In conclusion, warmly recommended. Lots to learn!" - GM Matthew Sadler, New in Chess

Mauricio Flores Rios is a grandmaster from Chile. He achieved the title at eighteen, and is a regular member of Chile's Olympad team. Mauricio combines his career as a chess player and trainer with his PhD studies in Mathematics at the University of Minnesota.

"There is also masses of stuff in the book that made me go ‘Oooh!' and ‘Aaah!' so I think it will have the same effect on you! In particular, I loved Rios' exposition of White's plan of exerting queenside pressure against Hedgehog systems. I'd seen one of the games he quotes in his chapter but I'd never remotely made any link to a structured way of fighting the Hedgehog structure, so this chapter was a real eye-opener for me…In conclusion, warmly recommended. Lots to learn!" - GM Matthew Sadler, New in Chess