[Retros] A fruitful concept

[Nicolas.Dupont at math.univ-lille1.fr]

Dear Andrey and all,


> your previous pattern, with the bishop Rundlauf, was

> in my opinion more beautiful from the aesthetic point of view.


This is the crual law of establishing records : the goal is to go fast,
not to produce something nice...


> This counterpart capture of switchback mate concept has proved to be

> amazingly fruitful, hasn't it?


Surely it is. A friend of mine had a new related task, but we have to
verify its real interest before presenting it on that retro corner.

Here are the current best results, containing a new record by Itamar. I
indicate only the "final" author, as it becomes difficult in some cases to
list co-authors.

More than one capture :

Knight 21 (Nicolas Dupont) 1.Cb1-c3 Pe7-e6 2.Cc3-e4 Re8-e7 3.Ce4-f6 Re7-d6
4.Cf6xg8 Rd6-c5 5.Pb2-b4 Rc5xb4 6.Fc1-b2 Dd8-h4 7.Fb2-f6 Rb4-a3 8.Cg8-e7
Dh4-a4 9.Ce7-d5 Ff8-b4 10.Cd5-c3 Pc7-c5 11.Cc3-b1

Bishop 17 (Itamar Faybish) 1.Pe2-e4 Pe7-e5 2.Ff1-a6 Pb7-b5 3.Fa6xc8 Re8-e7

4.Fc8-b7 Re7-f6 5.Fb7-d5 Rf6-g5 6.Cg1-h3 Rg5-h4 7.Pg2-g3 Rh4xh3 8.Fd5-c4
Dd8-h4 9.Fc4-f1

Rook 18 (Itamar Faybish) 1.Pe2-e3 Ph7-h5 2.Dd1-g4 Ph5xg4 3.Re1-e2 Th8xh2

4.Re2-d3 Th2xh1 5.Rd3-e4 Pf7-f5 6.Re4xf5 Pg7-g6 7.Rf5xg6 Cg8-h6 8.Rg6-h7
Ch6-f7 9.Rh7-g8 Th1-h8

Queen 16 (Andrey Frolkin) 1.Sg1-f3 Pe7-e5 2.Sf3xe5 Bf8-b4 3.Se5xd7 Bb4xd2

4.Ke1xd2 Ke8xd7 5.Kd2-e3 Kd7-c6 6.Ke3-f4 Qd8xd1 7.Kf4-g5 Ph7-h5 8.Bc1-f4
Qd1-d8

Only one capture :

Knight 23 (Olli Heimo) 1.Sg1-f3 Pd7-d6 2.Sf3-d4 Ke8-d7 3.Sd4-c6 Kd7-e6   
4.Sc6xb8 Ke6-f5 5.Sb8-c6 Kf5-g4 6.Sc6-d4 Pc7-c6 7.Pg2-g3 Qd8-a5 8.Bf1-g2
Qa5-h5 9.Bg2-f3 Kg4-h3 10.Pe2-e4 Pg7-g5 11.Sd4-e2 Bf8-h6 12.Se2-g1

Bishop 18 (Andrey Frolkin) 1.Pe2-e3 Pd7-d5 2.Ke1-e2 Bc8-h3 3.Pg2-g4 Bh3xf1

4.Ke2-f3 Bf1-a6 5.Kf3-f4 Pe7-e5 6.Kf4-f5 Bf8-a3 7.Pb2-b4 Ba3-b2 8.Pa2-a3
Pb7-b5 9.Ra1-a2 Ba6-c8

Rook 23 (Andrew Buchanan) 1.Ph2-h4 Pa7-a5 2.Ph4-h5 Pa5-a4 3.Th1-h4 Pa4-a3 
4.Th4-a4 Pc7-c6 5.Ta4xa8 Dd8-a5 6.Ta8-a6 Re8-d8 7.Ta6-b6 Rd8-c7 8.Tb6-b4  
Rc7-d6 9.Tb4-h4 Rd6-e5 10.Pg2-g4 Re5-f4 11.Pf2-f3 Rf4-g3 12.Cg1-h3 Rg3-h2

13.Ch3-f2 Rh2-g1 14.Th4-h1

Queen 18 (Andrey Frolkin) 1.Pd2-d3 Pe7-e5 2.Ke1-d2 Qd8-g5 3.Kd2-c3 Qg5-d2

4.Kc3-c4 Qd2xd1 5.Kc4-b5 Qd1-d2 6.Pc2-c4 Qd2-g5 7.Bc1-f4 Pc7-c5 8.Sb1-d2
Pa7-a6 9.Kb5-b6 Qg5-d8

Best,

Nicolas.