MESON Chess Problem Database

Problem Display
PID: 204523 (2N3B1/1rP1q1P1/2p5/2k1nQp1/P1P3p1/P2nKb2/2RN1B2/8 w - - 0 1)

Homey, Hans

Arbeiter Schachzeitung, 1925

2N3B1/1rP1q1P1/2p5/2k1nQp1/P1P3p1/P2nKb2/2RN1B2/8

#2

12 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qf8
      • 2.Qxf8#
      • 2.gxf8Q#
      • 2.gxf8B#
    • 1...Rb3
      • 2.Sxb3#
    • 1...Rb5
      • 2.cxb5#
    • 1...Ra7
      • 2.Sb3#
    • 1...Rxc7
      • 2.Sb3#
    • 1...Bd1
      • 2.Se4#
    • 1...Be2
      • 2.Se4#
    • 1...Be4
      • 2.Sxe4#
    • 1...Sb4
      • 2.Sb3#
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxe7#
      • 1...Sxc4+
        • 2.Kxd3#
      • 1...Sg6+
        • 2.Kxd3#
      • 1...Sf7+
        • 2.Kxd3#
      • 1...Qxf8
        • 2.gxf8Q#
        • 2.gxf8B#
      • 1...Rxc7
        • 2.Sb3#
      • 1...Qd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::S(B),XR(h)
    • R(h);OGATE::R(A)+P(G),XR(h)
    • R(h);N_GUARD::S(B)
    • R(h);N_GUARD,XP(I)::S(B)
    • B(b);N_GUARD::S(B)
    • B(b);N_GUARD::S(B),XB(b)
    • S(a);S_CUTR(h)::S(B)
  • Actual
    • Q(H);N_PINS(e),P_PINQ(i)
    • Threat
      • QAB(H),XQ(i)
    • Vars
      • S(e);CHECK,P_SPINS(e),XP(G)::B(C)+K(E),XS(a)
      • S(e);CHECK::B(C)+K(E),XS(a)
      • Q(i);N_SPINQ(i),OGATE,XQ(H)::PXQ(i)=Q
      • R(h);N_GUARD,XP(I)::S(B)
      • Q(i);OGATE::QAB1(H),XQ(i)
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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).