[Retros] rstan

[Francois Labelle]

On 10/10/2013 01:55 PM, Andrew Buchanan wrote:

> What about the following, please?

>

> A = [... d5 ... dxe4 ... Qd3+ ... Qxc2]

> B = [... Qd3+ ... Qc2]

> C = [...#]


This works for n = 0:
1. e4 d5 2. Qg4 dxe4 3. Ke2 Qd3+ 4. Ke1 Qxc2 5. Qxc8#

but it fails for n = 1 (5 solutions):
1. e4 d5 2. Ba6 dxe4 3. Kf1 Qd3+ 4. Qe2 Qxc2 5. Qg4 Qd3+ 6. Ke1 Qc2 7. Qxc8#
1. e4 d5 2. Ba6 dxe4 3. Kf1 Qd3+ 4. Qe2 Qxc2 5. Qg4 Qd3+ 6. Ne2 Qc2 7. Qxc8#
1. e4 d5 2. Bc4 dxe4 3. Kf1 Qd3+ 4. Qe2 Qxc2 5. Qg4 Qd3+ 6. Ke1 Qc2 7. Qxc8#
1. e4 d5 2. Bc4 dxe4 3. Kf1 Qd3+ 4. Qe2 Qxc2 5. Qg4 Qd3+ 6. Ne2 Qc2 7. Qxc8#
1. e4 d5 2. Qg4 dxe4 3. Ke2 Qd3+ 4. Ke1 Qxc2 5. Ke2 Qd3+ 6. Ke1 Qc2 7. Qxc8#

     François