r1bk3r/p2n1p2/3pp2p/1qp1Npb1/2Q3PP/1P1PP3/PBPn4/R2KR3 w - - 0 21
FEN state: r1bk3r/p2n1p2/3pp2p/1qp1Npb1/2Q3PP/1P1PP3/PBPn4/R2KR3 w - - 0 21 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8 and black rook at h8. Black pawn at a7, black knight at d7 and black pawn at f7. Black pawn at d6, black pawn at e6 and black pawn at h6. Black queen at b5, black pawn at c5, white knight at e5, black pawn at f5 and black bishop at g5. White queen at c4, white pawn at g4 and white pawn at h4. White pawn at b3, white pawn at d3 and white pawn at e3. White pawn at a2, white bishop at b2, white pawn at c2 and black knight at d2. White rook at a1, white king at d1 and white rook at e1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.