1r1k1b1r/p2bnp2/n4Bp1/1N2p3/1PppP2P/5P2/P5P1/1R1QKB1R w K - 0 20
FEN state: 1r1k1b1r/p2bnp2/n4Bp1/1N2p3/1PppP2P/5P2/P5P1/1R1QKB1R w K - 0 20 ; Best move: b5d6
The current state of the chess board is: Black rook at b8, black king at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black bishop at d7, black knight at e7 and black pawn at f7. Black knight at a6, white bishop at f6 and black pawn at g6. White knight at b5 and black pawn at e5. White pawn at b4, black pawn at c4, black pawn at d4, white pawn at e4 and white pawn at h4. White pawn at f3. White pawn at a2 and white pawn at g2. White rook at b1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 20. White to move.