What a position looks like is not evidence, only what it plays like
Here Black cannot make progress with best play unless White foolishly takes the g-pawn or moves the K. Then Black wins. White's R remains on the a-file unless checking safely. Neither side can change the position to their advantage.
Draw
The second way that the defending side can lose is to allow the rook to move away from the queening square with a tempo:
As long as White avoids walking into these two traps the drawing technique is quite easy. In the example in the original message, White will simply move his rook between a7 and a8, checking the Black king if it moves to b2, trying to defend the queening square. If the Black king moves up to attack the rook, White just plays it down to a3.
Originally posted by kuoniDo you mean I'm correct when I say that the original position is drawn with best play on both sides?
Fat lady is correct.
As it is black to move, simply ... Rg1 wins. If you require the moves please advise-there may be a hole.
1. ... Rg1 fails to 2. Kxg1. Although Black has vacated a1 for his pawn, he has lost the rook which prevented White from capturing it as soon as it promoted. Play would probably continue 2. ... Kb2 3. Rxa2 Kxa2 4. Kxg3.
Originally posted by Fat LadyYes. As i say I misplaced the white rook-I had it at b7.
Do you mean I'm correct when I say that the original position is drawn with best play on both sides?
1. ... Rg1 fails to 2. Kxg1. Although Black has vacated a1 for his pawn, he has lost the rook which prevented White from capturing it as soon as it promoted. Play would probably continue 2. ... Kb2 3. Rxa2 Kxa2 4. Kxg3.