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"Unofficial Champion" when he published the first modern chess book "Libre dels jochs partits dels schacs en nombre de 100" or "Book of 100 games of chess" printed in the city of Valencia.
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Francesc Vicnet
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"Unofficial Champion" after publishing his chess book "Questo libro e da imparare giocare a scachi et de li partiti" or "This book is for learning to play chess and its strategies" printed in Rome and the death of Francesc Vicnet. -
Pedro Damiano