py_20121120
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#2 with Siren and Triton
: move as a Queen and capture as a : plays as a Rook and capture as aBrian D. STEPHENSON
white Pe4c3a4a3 Sc8e5 Kh8 SIa2
black Pd3b7 Sb8 Bf1 TRb1 Kc5
#2(8+6)🨻b1: Triton🨴a2: Siren
{}
1.SIa2-d5 + ?
1...b7-b5
2.SId5-d4 #
but
1...TRb1-b5 !{}
1.SIa2-c4 + ?
but
1...Sb8-c6 !{}
1.SIa2-b3 ! threat:
2.SIb3-b6 #{}
1...TRb1*b3-b4
2.a3*b4 #{}
1...b7-b5
2.SIb3-b4 #{}
1...b7-b6
2.SIb3-b5 #{}
1...Sb8-c6
2.Se5-d7 #{}
1...Sb8-d7
2.SIb3-c4 #
serial s#11 Optionnal replacement
: White plays n moves in a row and only legal move for Black is checkmate White King : After a capture, capturing side can replace captured unit on any legal square or push it out of the chessboardOleg V. PARADZINSKYThe Problemist 20042° Honnor Mention
white Pc4d4 Kc6
black Sa8c1 Bd1 Ka6
ser-s#11(3+4)Optionnal Replacement
{}
1.Kc6-c5 2.Kc5-b4 {}
3.c4-c5 4.c5-c6 {}
5.c6-c7 6.c7-c8=R {}
7.Rc8*c1[+bSc8] 8.Rc1*c8[+bSc5] {}
9.d4*c5[+bSa4] 10.Kb4*a4[+bSc2] {}
11.Rc8*a8[+bSb7] + Sb7*c5[+wPa7] #
Proof Game Magnetic Chess
: sequence of legal moves played from the start position Magnetic chess : on the arrival square, you push a unit from your side or pull one from the opposing sideAlain BROBECKERThe Problemist 2010
white Bc1f1 Ke1 Qd1 Pa2b2c2d2f2e2g2h2 Sb1g1 Ra1h1
black Bc8f8 Ke8 Qd8 Pa7b7c7d7e7f7g7h7 Sb8g8 Ra8h8
PG Magnetic Chess(16+16)
a) 3.0-0#b) 3.F..#c) 3…Fd6-f8#d) 3…Fg7#
{}
a) {3.0-0#}
1.g2-g4 [-g7][+bPg5] f7-f5 [-f2][+wPf4]
2.Bf1-h3 [-h7][+bPh4] f5*g4 [-g1][+wSg3]
3.0-0 [-f4][+wPf7] #{}
b) {3.F??#}
1.d2-d4[-d7][+bPd5] g7-g5 [-g2][+wPg4][-d5][+bPa5] 2.Bc1-f4 [-f7][+bPf5][-d4][+wPa4][-g4][+wPh4] g5*h4 [-h2][+wPh3][-f4][+wBg4]
3.Bg4-h5 [-h7][+bPh6][-f5][+bPg5] # {}
c) {3...Fd6-f8#}
1.c2-c3 [-c7][+bPc4] f7-f5 [-f2][+wPf4] 2.e2-e4 [-e7][+bPe5][-c4][+bPd4][-f4][+wPh4] Bf8-d6 [-d4][+bPd3]
3.c3-c4 [-c8][+bBc5] Bd6-f8 [-f5][+bPf2] #{}
d) {3...Fg7#}
1.e2-e3 [-e7][+bPe4] Sg8-e7 2.g2-g4 [-g7][+bPg5][-e4][+bPf4] Se7-f5 [-f4][+bPf3][-g5][+bPh5]
3.g4*h5 [-h7][+bPh6][-f5][+bSg5] Bf8-g7 [-g5][+bSg2][-f7][+bPe7] #
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