r1b1k2r/p2p1p2/np3n1p/4p1p1/4PP2/3P2KP/P1PN2P1/b1BQNB1R w - - 2 23
FEN state: r1b1k2r/p2p1p2/np3n1p/4p1p1/4PP2/3P2KP/P1PN2P1/b1BQNB1R w - - 2 23 ; Best move: e1f3
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at d7 and black pawn at f7. Black knight at a6, black pawn at b6, black knight at f6 and black pawn at h6. Black pawn at e5 and black pawn at g5. White pawn at e4 and white pawn at f4. White pawn at d3, white king at g3 and white pawn at h3. White pawn at a2, white pawn at c2, white knight at d2 and white pawn at g2. Black bishop at a1, white bishop at c1, white queen at d1, white knight at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 23. White to move.