Updated every Monday, Wednesday and Friday ... and maybe other days too.
Either I'm missing something obvious or Justin's left us a tough one here...
Well, I have worked out (a): 1. Rg1 forces the advance of either e-pawn or f-pawn, else 2. Rxe3:1. ... f2 2. Rf1 e2 3. Rxf2+ Ke7 (3. ... Kg7 4. Rg3+ Kh6 5. Rh3#) 4. Rxe2+ Kd6 5. Rxd2;1. ... e2 2. Rxf3+ Ke7 3. Rff1! and demonstrate your knowledge of K+R mate technique.But I don't yet have (b). Some kind of mate using the ranks, perhaps?
I considered 1. Rg1 too, but what about 1. ... f2, 2. Rf1 d1=Q, 3. Rxd1 e2rather than the immediate 2. ... e2?Now there's no Rxf2 check.
Also,1. Rg1 f2, 2. Rd1 e2 (not the mirror of the previous line with 2. ... f1=Q because 3. Rxf1 is check so there's no time for Blac to play ...e3-e2
Thought I had it then (borrowing an idea from your second line)1. Rg1 f1, 2. Rf1 d1=Q, 3. Rxd1 e2, 4. Rf3+ Kg7, 5. Rg3+ Kf6, 6. Rgg1Black can't do anything with the pawns ... but then I thought what if he just advances the King. Can White actually take either of the pawns without losing the other rook?
Oh of course he can...6. ... Ke5, 7. Rge1that does it I think.
1. Rf6+ 1... Ke7 2. Rxe3+ Kxf6 3. Rxf3+ etc1... Kg7 2. Rd6 1... Kg8 2. Ra8+ Kg7 3. Rd6 Kf7 4. Ra7+ Ke8 5. Ka2 f2 (5...e2 6. Rh6) 6.Re6+ and 7. Rh6/b6Richard
Without further computer assistance? What computer assistance have we had up to that point? Nice puzzle btw (probably because I managed to solve it!).Andrew
I'm thinking that you probably can't see the diagram without computer assistance....
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