MESON Chess Problem Database

Problem Display
PID: 135350 (7K/4p2b/3pr3/8/1B1p4/2N2Q2/Rb1kP3/1rR3N1 w - - 0 1)

Laib, Kurt Friedrich

Die Schwalbe, 1934

7K/4p2b/3pr3/8/1B1p4/2N2Q2/Rb1kP3/1rR3N1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Scxe2#
    • 1...Rg6
      • 2.Qf4#
    • 1...Rh6
      • 2.Qf4#
    • 1...Be4
      • 2.Qf4#
    • 1...dxc3
      • 2.Qxc3#
  • Tries
    • 1.Qd3+?
      • 1...Kxc1
        • 2.Qd1#
      • 1...Bxd3!
  • Keys
    • 1.e4!
      • threat
        • 2.Sce2#
      • 1...Kxc1
        • 2.Qd1#
      • 1...Rxc1
        • 2.Qe2#
      • 1...dxc3
        • 2.Qxc3#
      • 1...dxe4 ep
        • 2.Qd1#
      • 1...d3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(f);XP(D)::B(G)+S(E),XR(f)
    • R(f);N_GUARD::QAB(F)
    • B(h);S_CUTR(f)::QAB(F)
    • P(d);OGATE,P_SPINP(d),XS(E)::QAB1(F),XP(d)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);N_SPINB(b),OGATE,S_FLIGHT,XR(A)::QAR1(F)
      • Refutation
        • B(h);XQ(F)
  • Actual
    • P(D);
    • Threat
      • B(G)+S(E)
    • Vars
      • K(c);N_SPINB(b),S_FLIGHT,XR(A)::QAR1(F)
      • R(a);SBLOCK,XR(A)::QAR1(F)
      • P(d);OGATE,P_SPINP(d),XS(E)::QAB1(F),XP(d)
      • P(d);EP,P_PINS(E),XP(D)::QAR1(F)
      • P(d);P_PINS(E),SBLOCK::QAB(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).