[Retros] Two SPG's from Paul Monsky

Nicolas.Dupont at math.univ-lille1.fr Nicolas.Dupont at math.univ-lille1.fr
Tue Mar 13 21:35:40 EDT 2007

Hi Noam,

> rnbqk3/ppppb1p1/4p3/8/8/1BP1P3/PPQPNn1P/R1BKNr1R (S)PG-12.0

6600 solutions. The expected one is surely

1.Pe2-e3 Pf7-f5 2.Ff1-d3 Pf5-f4 3.Fd3xh7 Pf4-f3
4.Fh7xg8 Pf3xg2 5.Fg8-b3 Pe7-e6 6.Cb1-c3 Ff8-e7
7.Cc3-e2 Th8-f8 8.Pc2-c3 Tf8xf2 9.Cg1-f3 Pg2-g1=C
10.Dd1-c2 Cg1-h3 11.Re1-d1 Tf2-f1 12.Cf3-e1 Ch3-f2

as this is the only one without any dual. Here is a cooking line :

1.Cb1-c3 Pe7-e6 2.Pe2-e3 Pf7-f5 3.Ff1-c4 Ph7-h5
4.Fc4-b3 Th8-h6 5.Dd1xh5 Th6-g6 6.Cg1-f3 Cg8-f6
7.Cc3-e2 Ff8-e7 8.Dh5xf5 Tg6xg2 9.Pc2-c3 Cf6-g4
10.Re1-d1 Tg2-g1 11.Cf3-e1 Tg1-f1 12.Df5-c2 Cg4xf2

> 1nb2b1r/2pnpkrp/2p5/8/2p4q/2p5/2p4P/5KRR (S)PG-22.0moves)

More than 10000 solutions, eg

1.Cb1-a3 Pb7-b5 2.Ca3-c4 Cg8-f6 3.Cc4-b6 Pa7xb6
4.Pb2-b4 Ta8xa2 5.Pc2-c4 Pb5xc4 6.Pd2-d4 Pg7-g5
7.Pe2-e4 Ta2xf2 8.Pe4-e5 Tf2xg2 9.Pe5-e6 Pf7xe6
10.Fc1xg5 Re8-f7 11.Fg5-e3 Tg2-g7 12.Pd4-d5 Pe6xd5
13.Fe3-c5 Pb6xc5 14.Cg1-e2 Pc5xb4 15.Ce2-c3 Pb4xc3
16.Ff1-g2 Pc3-c2 17.Dd1-d3 Pc4-c3 18.Dd3-c4 Pd5xc4
19.Fg2-c6 Pd7xc6 20.Re1-e2 Dd8-d4 21.Ta1-g1 Dd4-h4
22.Re2-f1 Cf6-d7

If the intention is to build a column of pawns, the task has been
completely achieved (by myself) :

1.Ph2-h4 Pg7-g5 2.Ph4xg5 Cg8-f6 3.Pg5xf6 Ff8-h6
4.Pf6xe7 Fh6-e3 5.Pd2xe3 Pb7-b5 6.Dd1-d6 Pb5-b4
7.Dd6-g3 Pb4-b3 8.Pa2xb3 Pc7-c5 9.Ta1-a4 Pc5-c4
10.Pb3xc4 Pd7-d5 11.Pc4xd5 Fc8-e6 12.Pd5xe6 Dd8-d5
13.Ta4-h4 Dd5-f3 14.Pg2xf3 Th8-g8 15.Ff1-g2 Tg8-g4
16.Re1-f1 Tg4-e4 17.Pf3xe4 Pa7-a5 18.Pf2-f4 Pa5-a4
19.Cg1-f3 Ta8-a5 20.Th1-g1 Ta5-e5 21.Pf4xe5

> He also asks whether quintupled (or sextupled!) pawns have already been

> shown in a sound proof game.

I suppose that you are speaking of promoted pawns. Look at that
extraordinary pg by Michel Caillaud :

1.d4 h5 2.d5 h4 3.d6 h3 4.d×ç7 h×g2 5.h4 a5 6.h5 a4 7.h6 a3 8.h7 a×b2
9.h×g8=T Th4 10.a4 Tg4 11.Thh8 Ta5 12.Ch3 Th5 13.a5 d5 14.a6 d4 15.a7 Dd5
16.a8=T Cd7 17.Tb8 g1=F 18.Taa8 Fh2 19.Ca3 b1=T 20.é4 Tb6 21.é5 Tbh6
22.é6 Cb6 23.é×f7+ Rd7 24.ç4 é5 25.ç5 Fd6 26.f8=T é4 27.Té8 Fdg3
28.ç6+ Rd6 29.Fb5 Fé6 30.ç8=T é3 31.ç7 é2 32.Fd7 é×d1=F 33.Rf1 d3
34.f4 d2 35.f5 d×ç1=D 36.f6 Dé3 37.f7 Fa4 38.f8=T Ff7 39.Tçd8 Déé6
40.ç8=T Fb5+ 41.Cç4+



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