No.599 by Sébastien Luce – A long back-forward journey of Locust! One another play by the scheme used by Chris Feather in Fairings-4(2009), N17! (JV)
Definitions:
Locust(L): Moves along Queen lines only by capturing an enemy unit, arriving on the square immediately beyond that unit, which must be vacant.
PWC: When a capture is made, the captured unit (except a King) is replaced on the square the capturing unit just leaves. A Pawn is immovable on its 1st rank.
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No.599 Sébastien Luce
France
original – 15.09.2014
After Chris Feather, Fairings-4(2009),N17
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Solution: (click to show/hide)
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White Kh1 Lb2 Ph3 Pg2
Black Ka1 Pc4 Ph4 Pg3 Ph2
h#11 (4+5)
PWC
Locust b2
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1.c4-c3 Lb2*c3-d4[+bPb2] 2.Ka1-a2 Ld4*b2-a1[+bPd4] + {
} 3.Ka2-b3 La1*d4-e5[+bPa1=B] 4.Ba1-d4 Le5*d4-c3[+bBe5] + {
} 5.Kb3-a4 Lc3*e5-f6[+bBc3] 6.Ka4-a5 Lf6*c3-b2[+bBf6] {
} 7.Bf6-d4 Lb2*d4-e5[+bBb2] 8.Bb2-d4 Le5*d4-c3[+bBe5] {
} 9.Be5-c7 Lc3*c7-c8[+bBc3] 10.Ka5-b6 Lc8*c3-c2[+bBc8] {
} 11.Bc8*h3[+wQc8] Qc8-a6 # {
(C+ by Popeye 4.69 and WinChloe 3.28)}
My begining point of inspiration was a problem of Chris Feather, Fairings 4, 2009 N17, h‡10 (2+7) C+ Circe echange LO=Locuste
White : Rg1 LOg5 Black : Re1 Th2 Fh1 Pg3h3d2g2
where white King is in jail leaving all the play to white Locust.
1.Rd1 LOxd2-c1(g5)+ 2.Re2 LOxg5-h6(Fc1) 3.Fg5 LOxg5-f4(Fh6) 4.Fg5 LOxg5-h6(Ff4) 5.Rd1 LOxf4-e3(Fh6) 6.Fxe3(LOh6)+ LOxe3-d2(Fh6) 7.Fe3+ LOxe3-f4(Fd2) 8.Fe3+ LOxe3-d2(Ff4) 9.Fd6 LOxd6-d7(Fd2) 10.Re1 LOxd2-d1(Fd7)‡
But I didn't like that black Rook h2 and Bishop h1 don't take part in the action. In the h#11, white King is also in jail, but the solution is very different: after captures of black "c" pawn by the Locust, the pawn is promoted in Bishop of black square. Then the Locust follows to capture black Bishop. During this time, black King goes to…b6 ! The reason appears on the 9th move (with white Locust in c8 & black Bishop in c3). The capture of Bishop c3 allows his change of colour in…c8! Then the capture of white pawn h3 allows…his promotion in Queen in c8 which can give unexpected mate in a6. (Author)
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No.599 