1rbk3r/p2p1p1p/n1pb1np1/8/qpNP3P/1P6/P4P1R/RK3BN1 w - - 4 23
FEN state: 1rbk3r/p2p1p1p/n1pb1np1/8/qpNP3P/1P6/P4P1R/RK3BN1 w - - 4 23 ; Best move: b3a4
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at d8 and black rook at h8. Black pawn at a7, black pawn at d7, black pawn at f7 and black pawn at h7. Black knight at a6, black pawn at c6, black bishop at d6, black knight at f6 and black pawn at g6. Black queen at a4, black pawn at b4, white knight at c4, white pawn at d4 and white pawn at h4. White pawn at b3. White pawn at a2, white pawn at f2 and white rook at h2. White rook at a1, white king at b1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 23. White to move.