MESON Chess Problem Database

Problem Display
PID: 202561 (8/4N1Q1/3Br1r1/2P1qb1N/2pnk1p1/5p2/2nR1P1p/3B3K w - - 0 1)

Vajda, Alfred

Nepszava, 1923

8/4N1Q1/3Br1r1/2P1qb1N/2pnk1p1/5p2/2nR1P1p/3B3K

#2

9 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Sxg3#
    • 1...Qf6
      • 2.Sg3#
    • 1...Qxg7
      • 2.Sg3#
    • 1...Qxc5
      • 2.Sg3#
    • 1...Qd5
      • 2.Sg3#
    • 1...Se2
      • 2.Bxc2#
    • 1...Sb3
      • 2.Bxc2#
    • 1...Sb5
      • 2.Bxc2#
    • 1...Sc6
      • 2.Bxc2#
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sc3#
      • 1...Kxd5
        • 2.Qb7#
      • 1...Qxd5
        • 2.Sg3#
      • 1...Se2
        • 2.Bxc2#
      • 1...Sb3
        • 2.Bxc2#
      • 1...Sb5
        • 2.Bxc2#
      • 1...Sc6
        • 2.Bxc2#
      • 1...c3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(h);N_GUARD::S(F),XQ(h)
    • Q(h);N_GUARD::S(F)
    • Q(h);N_GUARD,XQ(I)::S(F)
    • Q(h);N_GUARD,XP(E)::S(F)
    • S(e);N_GUARD::B(A),XS(a)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(f);OGATEB,P_SPINS(e),S_FLIGHT,XS(H)::QAB(I)
      • Q(h);N_GUARD,SBLOCK,XS(H)::S(F)
      • S(e);N_GUARD::B(A),XS(a)
      • P(d);::S(H),XP(d)
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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).