No. 196, August 2002
11583 - Alexander Zolotarev
Die Schwalbe, Heft 196, August 2002
12+11. Add a black pawn
and release the position (4bB)
[qR6/bb1p2p1/Kpp1pP2/3P4/k1P5/bbP5/RPP3P1/QB6]
11584 - Andrej Frolkin
Die Schwalbe, Heft 196, August 2002
12+13. Release the position!
[5KQ1/p2prpR1/4p1Rk/5prb/5Npn/P2P1P1B/1P1p1PP1/2b5]
11585 - Peter Olzewski
Die Schwalbe, Heft 196, August 2002
9+15. a) h#2 in such a way that b) has a solution
b) h#1 after the key of a)
c) Kf4->f8; h#2 in such a way that d) has a solution
d) h#1 after the key of c)
[r7/P1ppp2P/p5pr/4nqb1/3pPk2/3b1Pp1/3P1P2/2nRK1N1]
11586 - Alexander Jarosch
Die Schwalbe, Heft 196, August 2002
13+9. Retract a white move
for #3
[4k2r/Npp2pp1/4prPb/4QR2/5P2/1P2P1P1/P3P2P/R3K3]
11587 - Rustam Ubaidullaev
Die Schwalbe, Heft 196, August 2002
14+16. Proof game in 23.0
moves
[r4Bn1/pnpppp1Q/kq3Rpr/1p3B1p/P7/N3KR1P/2PPPP1N/b6b]
11588 - Andrej Kornilov/Andrej Frolkin
Die Schwalbe, Heft 196, August 2002
0+24. Color the pieces and
add the minimal number
of pieces for the shortest
possible proof game.
[6b1/1p1ppppp/p2ppp1b/6k1/8/5k1p/pp1nbpp1/3rbq2]
11589 - Wolfgang Dittmann
Die Schwalbe, Heft 196, August 2002
6+7. Retract 4 black and white
moves for a s#1 (Proca retractor,
Anticirce Cheylan)
[8/6p1/6p1/5Prb/6Rk/6p1/1P1K2P1/n2R4]
11590 - Bernd Gräfrath
Die Schwalbe, Heft 196, August 2002
11+7. Who can castle?
Last move? (Fischerrandom)
[1r3k2/pppp4/6p1/8/B3P2P/8/1PPP1PP1/R4KR1]
Fischerrandom
The starting position of the pieces (not pawns) is chosen randomly
(the black position being symmetric to the white), with two conditions:
The bishops end up on different colored squares, and the king
ends up between the two rooks.
Castling follows the same rules (not while in check, no castling through
guarded squares, squares between king and rook should be unoccupied).
Queenside castling is done by moving the king to c1 and the rook closest
to the a-line to d1. Both squares should be empty, or occupied by the
king/rook. Similarly, kingside castling finishes with a king on g1 and
a rook on f1.
In the diagram position, two castlings are possibly legal: black queenside
castling, and white kingside castlings.
The initial position in 11590 is:
[qrbnnkrb/pppppppp/8/8/8/8/PPPPPPPP/QRBNNKRB]