MESON Chess Problem Database

Problem Display
PID: 265153 (8/8/2K2p1B/4N1nr/2pkn1B1/4R2p/3b3Q/5N2 w - - 0 1)

Carra, Arturo

Norsk Sjakkblad, 1928

8/8/2K2p1B/4N1nr/2pkn1B1/4R2p/3b3Q/5N2

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Qxd2#
    • 1...Sg3
      • 2.Qxd2#
    • 1...Sd6
      • 2.Qxd2#
    • 1...Sf3
      • 2.Sxf3#
    • 1...Se6
      • 2.Sf3#
    • 1...Sf7
      • 2.Sf3#
    • 1...Sh7
      • 2.Sf3#
    • 1...c3
      • 2.Rd3#
  • Tries
    • 1.Qxd2+?
      • 1...Kxe5
        • 2.Qd6#
      • 1...Sxd2!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Sf5#
      • 1...Kxe3
        • 2.Sf5#
      • 1...Kxe5
        • 2.Se2#
      • 1...Bxe3
        • 2.Se2#
      • 1...Sxg3
        • 2.Qxd2#
      • 1...Sd6
        • 2.Qxd2#
      • 1...Sf3
        • 2.Se2#
        • 2.Sxf3#
      • 1...Se6
        • 2.Se2#
        • 2.Sf3#
      • 1...Sf7
        • 2.Se2#
        • 2.Sf3#
      • 1...Sh7
        • 2.Se2#
        • 2.Sf3#
      • 1...f5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(e);N_GUARD::QAR2(B),XB(a)
    • S(f);N_GUARD::S(E),XS(f)
    • S(f);N_GUARD::S(E)
    • P(c);N_GUARD::R1(C)
  • Tries
    • Try
      • Q(B);CHECK,XB(a)
      • Vars
        • K(d);OGATE,P_SPINS(e),S_FLIGHT,XS(E)::QAB1(B)
      • Refutation
        • S(e);XQ(B)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(d);P_SPINS(f),S_FLIGHT,XR(C)::S(A)
      • K(d);N_GUARD,P_SPINS(e),S_FLIGHT,XS(E)::QAB(B)+S(A)
      • B(a);SBLOCK,XR(C)::S(A)
      • S(e);N_GUARD,XS(A)::QAR2(B),XB(a)
      • S(e);N_GUARD::QAR2(B),XB(a)
      • P(h);::S(A),XP(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).