rnbk1r2/pp1p1p1p/2pQ1n1b/4p1p1/1P5P/2PPB1P1/P3PP1R/RN2KBN1 b Q - 0 13
FEN state: rnbk1r2/pp1p1p1p/2pQ1n1b/4p1p1/1P5P/2PPB1P1/P3PP1R/RN2KBN1 b Q - 0 13 ; Best move: f6g4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at d8 and black rook at f8. Black pawn at a7, black pawn at b7, black pawn at d7, black pawn at f7 and black pawn at h7. Black pawn at c6, white queen at d6, black knight at f6 and black bishop at h6. Black pawn at e5 and black pawn at g5. White pawn at b4 and white pawn at h4. White pawn at c3, white pawn at d3, white bishop at e3 and white pawn at g3. White pawn at a2, white pawn at e2, white pawn at f2 and white rook at h2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 13. Black to move.