MESON Chess Problem Database

Problem Display
PID: 96735 (B1qnQ1N1/3p4/r1r5/p2nb3/R2pk1Pp/3p1R2/3P1K2/2N5 w - - 0 1)

Svennerstedt, Stig Herman Svennin

Problem (Zagreb), 1955

B1qnQ1N1/3p4/r1r5/p2nb3/R2pk1Pp/3p1R2/3P1K2/2N5

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Sf6#
    • 1...Se3
      • 2.Sf6#
    • 1...Sb4
      • 2.Sf6#
    • 1...Sf4
      • 2.Sf6#
    • 1...Sb6
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sc7
      • 2.Sf6#
    • 1...Se6
      • 2.Qg6#
  • Tries
    • 1.Rf4+?
      • 1...Sxf4
        • 2.Sf6#
      • 1...Kxf4!
  • Keys
    • 1.Se2!
      • threat
        • 2.Rxd4#
      • 1...dxe2
        • 2.d3#
      • 1...Sb4
        • 2.Sf6#
      • 1...Se7
        • 2.Sc3#
      • 1...Rc4
        • 2.Rf4#
      • 1...Re6
        • 2.Re3#
      • 1...Se6
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(f);N_GUARD,P_SPINR(i)::S(I)
    • S(f);N_GUARD,N_SPINP(b),P_SPINR(i)::S(I)
    • S(f);N_GUARD,P_SPINR(i)::S(I),XS(f)
    • S(l);N_SPINB(g),S_CUTR(i)::QAB(H)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • S(f);P_SPINR(i),SBLOCK,XR(D)::S(I)
      • Refutation
        • K(c);N_SPINB(g),P-FLIGHT,XR(D)
  • Actual
    • S(A);
    • Threat
      • R1(E),XP(b)
    • Vars
      • P(a);OGATE,XS(A)::P(B)
      • S(f);N_GUARD,N_SPINP(b),P_SPINR(i)::S(I)
      • S(f);N_GUARD,N_SPINB(g),P_SPINR(i)::S(A)
      • R(i);N_SPINP(b),P_SPINS(f)::R1(D)
      • R(i);N_SPINB(g),P_SPINS(f)::R1(D)
      • S(l);N_SPINB(g),S_CUTR(i)::QAB(H)
HTML5 logo

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).