MESON Chess Problem Database

Problem Display
PID: 273164 (1BB1n3/K2P2rR/ppk2bbR/1NP5/1P1p4/2p1N3/4Q3/3r4 w - - 0 1)

Persson, Lars Holger

Schackvarlden, 1932

1BB1n3/K2P2rR/ppk2bbR/1NP5/1P1p4/2p1N3/4Q3/3r4

#2

11 + 10

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7+
      • 2.Bxd7#
    • 1...Rg8
      • 2.Bb7#
    • 1...Be7
      • 2.dxe8Q#
      • 2.dxe8B#
    • 1...Bd3
      • 2.Sxd4#
    • 1...Bf7
      • 2.d8S#
  • Keys
    • 1.Qc4!
      • threat
        • 2.cxb6#
      • 1...Rxd7+
        • 2.Bxd7#
      • 1...axb5
        • 2.Qd5#
      • 1...bxc5
        • 2.Qxc5#
      • 1...Be7
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Bd3
        • 2.Sxd4#
      • 1...Bf7
        • 2.d8S#
      • 1...Sd6
        • 2.cxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(i);CHECK,OGATE,XP(H)::B(K),XR(i)
    • R(i);N_PINP(H)::B(K)
    • B(g);N_PINP(H),P_SPINB(h)::PXS(j)=Q
    • B(h);P_SPINB(g),S_CUTR(a)::S(D),XP(c)
    • B(h);N_PINP(H),P_SPINB(g)::P=S
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+P(E),XP(e)
    • Vars
      • R(i);CHECK,OGATE,XP(H)::B(K),XR(i)
      • P(d);SBLOCK,XS(D)::QAB1(A)
      • P(e);OGATE,P_SPINP(e),XP(E)::QAR1(A),XP(e)
      • B(g);N_PINP(H),P_SPINB(h)::PXS(j)=Q
      • B(h);P_SPINB(g),S_CUTR(a)::S(D),XP(c)
      • B(h);N_PINP(H),P_SPINB(g)::P=S
      • S(j);OGATE::QAR(A)+P(E),XS(j)
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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).