No.436 by Paul Rãican – Exotic positions of the white and black Pawns! PG problem with Sentinels. (JV)
Definitions:
Sentinels: When a piece (Ks included but not pawns) moves, a pawn of the same colour appears on the vacated square unless that square is on the first or eighth ranks or there are 8 pawns of that colour on the board already.
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No.436 Paul Rãican
after H.Grudzinski & F. Tippmann
Romania
original-26.11.2013
PG 15 (16+15) С-
Sentinels
1.a4 b5 2.axb5 d5 3.Rxa7 Bh3 4.Rxc7 e6 5.Rxf7 Bxg2(+Ph3) 6.Rxg7(+Pf7)+ Ke7 7.Rxh7 Bf3(+Pg2) 8.Rh4 Bxe2(+Pf3) 9.Ra4(+Ph4) Bc4(+Pe2)! 10.Ra1 Ba2(+Pc4) 11.fxg8=B! Bb3(+Pa2) 12.Bxe6 Bxc2(+Pb3) 13.Bxd5(+Pe6) Bf5(+Pc2) 14.Be4(+Pd5) Bxe6 15.Bd3(+Pe4) cxd3.
Ceriani-Frolkin B, wR circuit.
The previous versions were successively:
Intention: 1.h4 g5 2.hxg5 e6 3.Rxh7 Ba3 4.Rxf7 Bb4[pa3] 5.Rxd7 Be7 6.Rxc7 Qd4 7.Rxb7 Qc3[pd4] 8.Rxa7 Qg3[pc3] 9.Ra6 Qxg5[pg3] 10.Rxe6[pa6] Qf4[pg5] 11.Rh6 Qe3[pf4] 12.Rh4 Bxa6 13.Rh2[ph4] gxh4 14.Rh1[ph2] Rh1[ph2].
Cooked by Eddy van Beers: 1.e3 e6 2.Qh5 Qh4 3.Qxh7 f5 4.Qxf5 d5 5.Qxd5 Qg3[ph4] 6.Qxb7 Qf4[pg3] 7.Qxa7 Qb4[pf4] 8.Qxc7 Qa3[pb4] 9.Qxg7 Qc3[pa3] 10.Qf6 Qd4[pc3] 11.Qxe6+ Be7 12.Qc4 Ba6 13.Qe2 Qxe3[pd4] 14.Qd1[pe2] Qe6[pe3].
Intention: 1.a4 b5 2.axb5 d5 3.Rxa7 Bh3 4.Rxc7 e6 5.Rxf7 Bxg2(+Ph3) 6.Rxg7(+Pf7)+ Ke7 7.Rxh7 Bf3(+Pg2) 8.Rh4 Bxe2(+Pf3) 9.Ra4(+Ph4) Bc4(+Pe2)! 10.Ra1 Ba2(+Pc4) 11.fxg8=B! Bb3(+Pa2) 12.Bxe6 Bxc2(+Pb3) 13.Bxd5(+Pe6) Bd3(+Pc2) 14.Bxc4(+Pd5) Bxc4(+Pd3).
Dual by Eddy van Beers: 9. … Bd3 10. Ra1 Ra2! 11. fg8=B Ra8 12. Be6 Bc2 13. Bd5 Bb3 14. Bc4 Bc4.
(Author)
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