MESON Chess Problem Database

Problem Display
PID: 273987 (8/8/8/B3K1Q1/8/5p2/R1n1nk1p/4RBb1 w - - 0 1)

Lindeberg, FM

Schackvarlden, 1933

8/8/8/B3K1Q1/8/5p2/R1n1nk1p/4RBb1

#2

6 + 6

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qh4#
    • 1...Sc1
      • 2.Qh4#
    • 1...Sc3
      • 2.Qh4#
    • 1...Sg3
      • 2.Qe3#
    • 1...Sd4
      • 2.Qh4#
    • 1...Sf4
      • 2.Qh4#
  • Tries
    • 1.Rxe2+?
      • 1...fxe2
        • 2.Qf4#
      • 1...Kxf1!
    • 1.Qh4+?
      • 1...Sg3
        • 2.Rxc2#
        • 2.Qd4#
      • 1...Ke3!
  • Keys
    • 1.Bh3!
      • threat
        • 2.Rf1#
      • 1...Sxe1
        • 2.Bb6#
      • 1...Sc3
        • 2.Qh4#
      • 1...Se3
        • 2.Qh4#
      • 1...Sc1
        • 2.Qh4#
      • 1...Sg3
        • 2.Qe3#
      • 1...Sed4
        • 2.Qh4#
      • 1...Sf4
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);P_SPINS(c),SBLOCK::QAB(F)
    • S(c);N_GUARD,P_SPINS(b)::QAB(F)
    • S(c);P_SPINS(b),SBLOCK::QAB1(F)
  • Tries
    • Try
      • R(A);CHECK,XS(c)
      • Vars
        • P(f);XR(A)::QAR2(F)
      • Refutation
        • K(d);P-FLIGHT,XB(B)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(d);P_SPINS(c),S_FLIGHT
  • Actual
    • B(B);
    • Threat
      • R1(A)
    • Vars
      • S(b);N_GUARD,P_SPINS(c),SBLOCK,XR(A)::B(D)
      • S(c);N_GUARD,P_SPINS(b)::QAB(F)
      • S(b);P_SPINS(c),SBLOCK::QAB(F)
      • S(c);P_SPINS(b),SBLOCK::QAB1(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).