py_20111025
Click in the right part of the chessboard to move forward, left to move backward... or directly on the move in the solution
s#2 Patrol
: to capture, unit must be observed by friendly unit on the starting square of the moveRaffi RUPPINThe Problemist, 2006
white Bb2 Ke4 Qc5 Pd6d5f6 Se6g7 Ra2
black Pb4b3 Ke5 Rc3 Sg2
s#2 Patrol(9+5)
{}
1.Qc5-g1 ! {}
1...Sg2-e1
2.Qg1-g2 +
2...Se1-f3 #{}
1...Sg2-h4
2.Qg1-g2 +
2...Sh4-f3 #{}
1...Sg2-f4
2.Qg1-g6 +
2...Sf4*g6 #{}
1...Sg2-e3
2.Qg1-g4 +
2...Se3*g4 #{}
1...b3*a2
2.Qg1-e3 +
2...Rc3*e3 #
serial h#12 Circe with neutral pieces
: Black plays n moves in a row helping White to (stale)mate him in one : captured unit is reborn on its original square if free : can be played by a side or the otherChris FEATHERThe Problemist, 20123° Prix
neutral Pe2e3h7
black Pb7a2 Ka1
white Ke1 Rb6
ser-h#12 Circé(2+3+3)e2, e3, h7: Neutral Pawns
{Apparent Play}
1...nPh7-h8=nB #{Real Play}
1.nPh7-h5 2.nPh5-h4 {}
3.nPh4-h3 4.nPh3-h2 {}
5.nPh2-h1=nB 6.nBh1-c6 {}
7.b7*c6[+nBf1] 8.nPe2*f1=nS {}
9.nSf1*e3[+nPe2] 10.nSe3-d1 {}
11.nPe2*d1=nS[+nSb1] 12.a2*b1=R Rb6-a6 #
#2
: opposite units of same kind mutually controlling are paralyzed : it is illegal to have mutual control of opposite units of same kind : prolongated Knight in successive jumpsGerard SMITS,Ruud R.A. BEUGELSDIJKProleemblas, 2008 - 1° Prix
white Bh3h2 Kd1 WNh1 Pe2 Sf4 Rg2
black Bb7 Ke4 BNa5 Qh8 Pd2e3d4d5e5f6 Rd8
#2(7+11)a) Madrasib) Isardam🨢h1, 🨨a5: Nightriders
{}
a) {Madrasi}
1.Sf4-e6 ?
but
1...d4-d3 !{}
1.Bh3-f5 + ?
but
1...Bb7-c8 !{}
1.WNh1-g3 + ?
but
1...BNa5-e7 !{}
1.WNh1-f2 + ?
but
1...e3*f2 !{}
1.Sf4-d3 ! threat:
2.Sd3-c5 #{}
1...BNa5-b3
2.WNh1-g3 #{}
1...Rd8-c8
2.Bh3-f5 #{}
1...Qh8-f8
2.Rg2-g4 #{}
b) {Isardam}
1.Sf4-e6 ?
but
1...Bb7-c8 !{}
1.Bh3-f5 + ?
but
1...BNa5-e7 !{}
1.WNh1-g3 + ?
but
1...Rd8-g8 !{}
1.WNh1-f2 + ?
but
1...e3*f2 !{}
1.Sf4-d3 ! threat:
2.Sd3-c5 #{}
1...BNa5-b3
2.Bh3-f5 #{}
1...Rd8-c8
2.Rg2-g4 #{}
1...Qh8-f8
2.WNh1-g3 #
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