EntityQ1472582· pop 24· linked from 551 articlesGrob's AttackSign in to savechess opening 1. g4Connectionsirregular chess openingEntityList of ECO codesEntityonline chessEntityBerlinEntitychessEntityMikhail GorbachevEntityGenoaEntityInternational Standard Book NumberEntitypawnEntitykingEntityrookEntityAnatoly KarpovEntityqueenEntityknightEntitybishopEntityFIDEEntitycastlingEntityGrandmasterEntitychess openingEntityChess OlympiadEntityCategoriesChess openings