1r2k1nr/1p1npp1p/5bp1/2N1PbP1/1pp4P/P2P4/R1P2KP1/2B2BNR w k - 1 21
FEN state: 1r2k1nr/1p1npp1p/5bp1/2N1PbP1/1pp4P/P2P4/R1P2KP1/2B2BNR w k - 1 21 ; Best move: c5d7
The current state of the chess board is: Black rook at b8, black king at e8, black knight at g8 and black rook at h8. Black pawn at b7, black knight at d7, black pawn at e7, black pawn at f7 and black pawn at h7. Black bishop at f6 and black pawn at g6. White knight at c5, white pawn at e5, black bishop at f5 and white pawn at g5. Black pawn at b4, black pawn at c4 and white pawn at h4. White pawn at a3 and white pawn at d3. White rook at a2, white pawn at c2, white king at f2 and white pawn at g2. White bishop at c1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 21. White to move.