1n2nr1k/r2pqp1p/b3p1p1/1pp3P1/p1P1P2P/PP1B1PK1/3P3R/b1BN1QN1 w - - 1 21
FEN state: 1n2nr1k/r2pqp1p/b3p1p1/1pp3P1/p1P1P2P/PP1B1PK1/3P3R/b1BN1QN1 w - - 1 21 ; Best move: c4b5
The current state of the chess board is: Black knight at b8, black knight at e8, black rook at f8 and black king at h8. Black rook at a7, black pawn at d7, black queen at e7, black pawn at f7 and black pawn at h7. Black bishop at a6, black pawn at e6 and black pawn at g6. Black pawn at b5, black pawn at c5 and white pawn at g5. Black pawn at a4, white pawn at c4, white pawn at e4 and white pawn at h4. White pawn at a3, white pawn at b3, white bishop at d3, white pawn at f3 and white king at g3. White pawn at d2 and white rook at h2. Black bishop at a1, white bishop at c1, white knight at d1, white queen at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. White to move.