py_20120103
Click in the right part of the chessboard to move forward, left to move backward... or directly on the move in the solution
#2 Lortap
: a unit can capture only if it is not "observed" by a unit of its sideHubert GOCKELJubilé C. Lytton-70The Problemist 2009-10 - 2° Prix
white Pe4f3 Kh6 Re7 Se8e2 Bh5
black Bg3h3 Kf5 Qb8 Pf6h2 Sh7h4 Ra4c5
#2 Anti-Patrol(7+10)
{}
1.Se8-d6 + ?
1...Bg3*d6
2.Re7-e5 #
but
1...Qb8*d6 !{}
1.Bh5-g4 ! threat:
2.Kh6-g6 #{}
1...Bg3-c7
2.Se8-d6 #{}
1...Bg3-d6
2.Re7-e5 #{}
1...Bg3-e5
2.f3-f4 #{}
1...Bg3-f4
2.Se2-g3 #{}
1...Sh7-f8
2.Kh6-g5 #
h#4 Functionnaries
: a unit can only move or capture if it is "observed" by an opponent unit
white Rd1 Be4 Kc1
black Re1 Kh1 Bg2
h#4 Functionnaries(3+3)b) ♚h1-->c4
{}
a) {}
1.Re1-g1 Be4-f3 2.Bg2-h3 Rd1-e1 {} 3.Kh1-h2 Re1-f1 4.Rg1-g3 Rf1-h1 #{}
b) bKh1-->c4{Kh1-->c4}
1.Bg2-f3 Be4-d3 + 2.Kc4-c3 Bd3-e2 {} 3.Bf3-d5 Rd1-d4 4.Bd5-b3 Rd4-c4 #
h#1,5 super-circe
: a captured unit is replaced on any legal square at the choice of capturing sideKohey YAMADAThe Problemist 2005
neutral Pf7
black Pe7 Kh8
white Kf8
h#1,5 Super-Circe(1+2+1)2 solutions🨅f7: neutral pawn
{}
1...Kf8*f7[+nPg1=nR] {} 2.nRg1-g6 Kf7*g6[+nRe8] #{}
1...Kf8*e7[+bPb1=B] {} 2.Bb1-h7 Ke7*f7[+nPa1=nB] #
h#2,5 Sentinels
: unit moving (except pawns) let a pawn on departure square : unit moving like a Bishop or a Knight : unit moving like a Knight or a Zebra ((1,2) or (2,3))Ivan ANTONOV
neutral Royal PRh1
h#2,5 Sentinels(0+0+1)
h1: neutral Royal Princessb) h1: neutral Royal Okapi
{}
a) {h1: neutral Royal Princess}
1...nrPRh1-d5 {} 2.nrPRd5-c7[+bPd5] nrPRc7-b6[+wPc7] {} 3.nrPRb6-a8[+bPb6] c7-c8=Q # {}
b) +nrOKh1 {h1: neutral Royal Okapi}
1...nrOKh1-f4 {} 2.nrOKf4-d7[+bPf4] nrOKd7-c5[+wPd7] {} 3.nrOKc5-a8[+bPc5] d7-d8=Q #
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