rnb1kb2/1p1ppppr/2p5/p1n4q/1N1P4/PP6/R1P1PPPP/1Q2KBNR w Kq - 6 13
FEN state: rnb1kb2/1p1ppppr/2p5/p1n4q/1N1P4/PP6/R1P1PPPP/1Q2KBNR w Kq - 6 13 ; Best move: d4c5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black bishop at f8. Black pawn at b7, black pawn at d7, black pawn at e7, black pawn at f7, black pawn at g7 and black rook at h7. Black pawn at c6. Black pawn at a5, black knight at c5 and black queen at h5. White knight at b4 and white pawn at d4. White pawn at a3 and white pawn at b3. White rook at a2, white pawn at c2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White queen at b1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside and black queenside castles are available. Half move number is 6. Full move number is 13. White to move.