MESON Chess Problem Database

Problem Display
PID: 270864 (b3Q2b/2p3Bp/3p4/3k1K1R/3q4/N5p1/4n3/3R4 w - - 0 1)

Ternblad, Helmer Ludvig

Schackvarlden, 1941

b3Q2b/2p3Bp/3p4/3k1K1R/3q4/N5p1/4n3/3R4

#2

6 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb5#
    • 1...Qxd1
      • 2.Kg4#
    • 1...Qd2
      • 2.Kg4#
    • 1...Qd3+
      • 2.Kg4#
    • 1...c5
      • 2.Qe4#
      • 2.Qxa8#
    • 1...h6
      • 2.Kg6#
  • Tries
    • 1.Rxd4+?
      • 1...Kc5
        • 2.Qb5#
      • 1...Sxd4+!
    • 1.Qxe2?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...c5
        • 2.Qf3#
        • 2.Qg2#
        • 2.Qe4#
      • 1...Qd3+!
    • 1.Qe5+?
      • 1...Kc6
        • 2.Qb5#
      • 1...dxe5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc4#
      • 1...Qd3+
        • 2.Kf6#
      • 1...Kc5
        • 2.Qb5#
      • 1...c5
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(d);N_SPINQ(c),P-FLIGHT,S_CUTP(f)::QAR1(F)
    • Q(c);N_SPINQ(c),XR(A)::R(D)+K(C)
    • Q(c);::R(D)+K(C)
    • Q(c);CHECK::R(D)+K(C)
    • P(g);::R(D)+K(C)
  • Tries
    • Try
      • R(A);CHECK,XQ(c)
      • Vars
        • K(d);P-FLIGHT::QAR1(F)
      • Refutation
        • S(a);CHECK,XR(A)
    • Try
      • Q(F);XS(a)
      • Threat
        • QAB1(F)
      • Vars
        • K(d);N_SPINQ(c),P-FLIGHT,S_CUTP(f)::QAR1(F)
        • K(d);N_SPINQ(c),S_CUTP(f),S_FLIGHT::QAB1(F)
      • Refutation
        • Q(c);CHECK
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);N_SPINQ(c),OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • P(e);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • Q(c);CHECK::R(D)+K(C)
      • K(d);N_SPINQ(c),P-FLIGHT,S_CUTP(f)::QAR1(F)
      • P(f);N_GUARD,SBLOCK::QAB(F),XB(h)
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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).