| 
                                    
                                        gptkbp:instanceOf
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:chess_opening
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:alsoKnownAs
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Russian_Defense
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:characterizedBy
                                    
                                 | 
                                
                                    
                                        
                                            
                                            early queen exchange possibilities
                                        
                                        
                                         
                                    
                                        
                                            
                                            symmetrical pawn structure
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:commonTrap
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Cochrane_Gambit
                                        
                                         
                                    
                                        
                                            gptkb:Lasker_Trap
                                        
                                         
                                    
                                        
                                            gptkb:Stafford_Gambit
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:counterTo
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:King's_Pawn_Opening
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:drawishReputation
                                    
                                 | 
                                
                                    
                                        
                                            
                                            yes
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:ECOCode
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:C43
                                        
                                         
                                    
                                        
                                            
                                            C42
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:family
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Open_Game
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:favoredBy
                                    
                                 | 
                                
                                    
                                        
                                            
                                            defensive players
                                        
                                        
                                         
                                    
                                        
                                            
                                            players seeking equality as Black
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:firstBook
                                    
                                 | 
                                
                                    
                                        
                                            
                                            1.e4 e5 2.Nf3 Nf6
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:firstDescribed
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:19th_century
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:frequentlyLeadsTo
                                    
                                 | 
                                
                                    
                                        
                                            
                                            endgame positions
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:mainLine
                                    
                                 | 
                                
                                    
                                        
                                            
                                            3.Nxe5 d6 4.Nf3 Nxe4
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:namedAfter
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Alexander_Petrov
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:notableGame
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Caruana_vs_Karjakin,_Candidates_2018
                                        
                                         
                                    
                                        
                                            gptkb:Karpov_vs_Kasparov,_World_Championship_1985
                                        
                                         
                                    
                                        
                                            gptkb:Kasparov_vs_Kramnik,_Linares_1996
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:popularFor
                                    
                                 | 
                                
                                    
                                        
                                            
                                            classical chess
                                        
                                        
                                         
                                    
                                        
                                            
                                            high-level chess
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:relatedTo
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Ruy_Lopez
                                        
                                         
                                    
                                        
                                            gptkb:Italian_Game
                                        
                                         
                                    
                                        
                                            gptkb:Philidor_Defense
                                        
                                         
                                    
                                        
                                            gptkb:Scotch_Game
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:suitableFor
                                    
                                 | 
                                
                                    
                                        
                                            
                                            all levels of play
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:theme
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:symmetry
                                        
                                         
                                    
                                        
                                            
                                            central control
                                        
                                        
                                         
                                    
                                        
                                            
                                            counterattack
                                        
                                        
                                         
                                    
                                        
                                            
                                            solid defense
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:theory
                                    
                                 | 
                                
                                    
                                        
                                            
                                            well-analyzed
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:typicalOpeningMoves
                                    
                                 | 
                                
                                    
                                        
                                            
                                            1.e4 e5 2.Nf3 Nf6
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:usedBy
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Garry_Kasparov
                                        
                                         
                                    
                                        
                                            gptkb:Magnus_Carlsen
                                        
                                         
                                    
                                        
                                            gptkb:Vladimir_Kramnik
                                        
                                         
                                    
                                        
                                            gptkb:Boris_Gelfand
                                        
                                         
                                    
                                        
                                            gptkb:Fabiano_Caruana
                                        
                                         
                                    
                                        
                                            gptkb:Ian_Nepomniachtchi
                                        
                                         
                                    
                                        
                                            gptkb:Sergey_Karjakin
                                        
                                         
                                    
                                        
                                            gptkb:Vishwanathan_Anand
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:variant
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Cochrane_Gambit
                                        
                                         
                                    
                                        
                                            gptkb:Nimzowitsch_Attack
                                        
                                         
                                    
                                        
                                            gptkb:Steinitz_Attack
                                        
                                         
                                    
                                        
                                            gptkb:Classical_Variation
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bfsParent
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Vladimir_Kramnik
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bfsLayer
                                    
                                 | 
                                
                                    
                                        
                                            
                                            6
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        https://www.w3.org/2000/01/rdf-schema#label
                                    
                                 | 
                                
                                    
                                        
                                            
                                            Petrov Defense
                                        
                                        
                                         
                                    
                                 |