While composing a study (White to move and win), I have a very unclear position at some point. The main idea and all its variations are working just fine, but I also need any other line (try) by white to fail (black to hold the draw).
After about 30 moves into the line, some variations reveal the following position, or similar (I get a lot of positions with bK at the edge, rooks somewhere on the f and g files, wP at b7, bP at a4 or a5 and bQ in the middle of the board):
Now, if the black pawn were missing, Nalimov sais that it's a draw by a very fine thread (which is just fine for me). But I am very concerned whether the black pawn doesn't actually interfere with the perpetual check attempts by the black queen. For instance, diagram2, 1...Qa1 2.Rf1! is a draw or not?
Any ideas how to analyse this? Does any of you have access to 7-men database (I know it's huge)?
While composing a study (White to move and win), I have a very unclear position at some point. The main idea and all its variations are working just fine, but I also need any other line (try) by white to fail (black to hold the draw).
After about 30 moves into the line, some variations reveal the following position, or similar (I get a lot of positions with bK at the edge, rooks somewhere on the f and g files, wP at b7, bP at a4 or a5 and bQ in the middle of the board):
Now, if the black pawn were missing, Nalimov sais that it's a draw by a very fine thread (which is just fine for me). But I am very concerned whether the black pawn doesn't actually interfere with the perpetual check attempts by the black queen. For instance, diagram2, 1...Qa1 2.Rf1! is a draw or not?Any ideas how to analyse this? Does any of you have access to 7-men database (I know it's huge)?