MESON Chess Problem Database

Problem Display
PID: 272524 (nbq2BB1/1p5K/1Rn1P3/1RPk1N2/2p2P2/2PPP3/6b1/8 w - - 0 1)

Hage, Poul

Die Schwalbe, 1932

nbq2BB1/1p5K/1Rn1P3/1RPk1N2/2p2P2/2PPP3/6b1/8

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7+
      • 2.exd7#
    • 1...Qc7+
      • 2.e7#
    • 1...Qd8
      • 2.e7#
    • 1...Bf1
      • 2.e4#
    • 1...Bh3
      • 2.e4#
    • 1...Bd6
      • 2.cxd6#
    • 1...Sb4
      • 2.Se7#
      • 2.c6#
    • 1...Sd4
      • 2.Se7#
    • 1...Sa5
      • 2.Se7#
      • 2.c6#
    • 1...Se5
      • 2.Se7#
      • 2.c6#
    • 1...Sa7
      • 2.Se7#
    • 1...Se7
      • 2.Sxe7#
      • 2.c6#
    • 1...Sd8
      • 2.Se7#
      • 2.c6#
    • 1...Sxb6
      • 2.cxb6#
  • Keys
    • 1.Sd6!
      • threat
        • 2.dxc4#
      • 1...Qd7+
        • 2.exd7#
      • 1...Qc7+
        • 2.e7#
      • 1...Be4+
        • 2.dxe4#
      • 1...Bxd6
        • 2.cxd6#
      • 1...Sxb6
        • 2.cxb6#
      • 1...cxd3
        • 2.c4#
      • 1...Bf1
        • 2.e4#
      • 1...Sa5
        • 2.c6#
      • 1...Se5
        • 2.c6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(h);CHECK,OGATE::B(L)+P(I),XQ(h)
    • Q(h);CHECK,N_GUARD::B(L)+P(I)
    • Q(h);N_GUARD::B(L)+P(I)
    • B(a);N_GUARD::P(C)
    • B(g);OGATE::R(E)+P(F),XB(g)
    • S(d);N_GUARD::S(G)
    • S(f);OGATE,XR(H)::R(E)+P(F),XS(f)
  • Actual
    • S(G);
    • Threat
      • P(B),XP(b)
    • Vars
      • Q(h);CHECK,OGATE::B(L)+P(I),XQ(h)
      • Q(h);CHECK,N_GUARD::B(L)+P(I)
      • B(a);CHECK,OGATE::P(B),XB(a)
      • B(g);OGATE,XS(G)::R(E)+P(F),XB(g)
      • S(f);OGATE,XR(H)::R(E)+P(F),XS(f)
      • P(b);OGATE,XP(B)::P(A)
      • B(a);N_GUARD::P(C)
      • S(d);OGATE::R(E)+P(F)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).