MESON Chess Problem Database

Problem Display
PID: 272893 (1R4bK/2B5/pn6/NPk4p/1n1p1N2/P2P2Q1/8/1R4bq w - - 0 1)

Ceder, Sven Ture

Schackvarlden, 1938

1R4bK/2B5/pn6/NPk4p/1n1p1N2/P2P2Q1/8/1R4bq

#2

10 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...S4d5
      • 2.Sb7#
    • 1...Sc6
      • 2.Sb7#
    • 1...Sa4
      • 2.axb4#
    • 1...Sc4
      • 2.Sb3#
      • 2.axb4#
    • 1...S6d5
      • 2.Sb3#
    • 1...Sd7
      • 2.axb4#
    • 1...Sa8
      • 2.axb4#
    • 1...Sc8
      • 2.axb4#
    • 1...axb5
      • 2.axb4#
  • Tries
    • 1.Bxb6+?
      • 1...Kxb5
        • 2.Rxb4#
      • 1...Kd6!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qxb4#
      • 1...Kxb5
        • 2.Qxb4#
      • 1...Sxd3
        • 2.Qe7#
      • 1...Sa2
        • 2.Qe7#
      • 1...Sc2
        • 2.Qe7#
      • 1...S4d5
        • 2.Sb7#
      • 1...Sc6
        • 2.Sb7#
      • 1...S6d5
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(c);S_CUTQ(b)::S(F)
    • S(h);::P(B),XS(c)
    • S(h);S_CUTB(i)::S(F)
    • P(g);SBLOCK,XP(G)::P(B),XS(c)
  • Tries
    • Try
      • B(H);CHECK,XS(h)
      • Vars
        • K(e);N_GUARD,P-FLIGHT,P_SPINS(c),XP(G)::R1(A),XS(c)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAB1(D),XS(c)
    • Vars
      • K(e);P-FLIGHT,P_SPINS(c),XP(G)::QAR1(D),XS(c)
      • S(c);XP(C)::QAB(D)
      • S(c);::QAB(D)
      • S(c);S_CUTQ(b)::S(F)
      • S(h);S_CUTB(i)::S(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).