MESON Chess Problem Database

Problem Display
PID: 265206 (8/5n1B/N6b/1PR1P3/1p1kn3/1P6/Q7/K2N3b w - - 0 1)

Carra, Arturo

Problemas, 1951

8/5n1B/N6b/1PR1P3/1p1kn3/1P6/Q7/K2N3b

#2

9 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Rd5#
    • 1...Sd2
      • 2.Qb2#
    • 1...Sf2
      • 2.Qb2#
    • 1...Sg3
      • 2.Qb2#
    • 1...Seg5
      • 2.Qb2#
      • 2.Qd2#
      • 2.Qf2#
    • 1...Sed6
      • 2.Qb2#
    • 1...Sf6
      • 2.Qb2#
  • Tries
    • 1.Qb2+?
      • 1...Kd3
        • 2.Sxb4#
        • 2.Rd5#
      • 1...Sc3!
    • 1.Qf2+?
      • 1...Kd3
        • 2.Sb2#
        • 2.Sxb4#
        • 2.Rd5#
      • 1...Be3
        • 2.Qxe3#
      • 1...Sxf2!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Rd5#
      • 1...Kd3
        • 2.Rd5#
      • 1...Kxc5
        • 2.Qa7#
      • 1...Sxc5
        • 2.Qb2#
      • 1...Sd2
        • 2.Se6#
      • 1...Sf2
        • 2.Se6#
      • 1...Sc3
        • 2.Se6#
      • 1...Sg3
        • 2.Se6#
      • 1...Seg5
        • 2.Qf2#
      • 1...Sed6
        • 2.Se6#
      • 1...Sf6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,P-FLIGHT,P_SPINS(d)::R(F)
    • S(d);N_GUARD::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(C);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAB1(C),XB(e)
      • Refutation
        • S(d);XQ(C)
  • Actual
    • S(H);
    • Threat
      • R1(F)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(d)::R(F)
      • K(c);OGATEB,S_FLIGHT,XR(F)::QAB(C)
      • S(d);N_GUARD,SBLOCK,XR(F)::QAB(C)
      • S(d);::S(H)
      • S(d);N_GUARD,S_CUTB(e)::QAB(C)
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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).