r1b1k2r/1pqp1p1p/n4n2/1Nb3p1/2PP1pP1/8/PP2PK1P/R1B2BNR w - - 4 13
FEN state: r1b1k2r/1pqp1p1p/n4n2/1Nb3p1/2PP1pP1/8/PP2PK1P/R1B2BNR w - - 4 13 ; Best move: b5c7
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at b7, black queen at c7, black pawn at d7, black pawn at f7 and black pawn at h7. Black knight at a6 and black knight at f6. White knight at b5, black bishop at c5 and black pawn at g5. White pawn at c4, white pawn at d4, black pawn at f4 and white pawn at g4. White pawn at a2, white pawn at b2, white pawn at e2, white king at f2 and white pawn at h2. White rook at a1, white bishop at c1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 13. White to move.