MESON Chess Problem Database

Problem Display
PID: 202529 (4Qn2/3ppq2/3BkNn1/2Ppp1P1/6Pp/5R2/2K5/4R3 w - - 0 1)

Sooky, Gabor

Uj Nemezdek, 1923

4Qn2/3ppq2/3BkNn1/2Ppp1P1/6Pp/5R2/2K5/4R3

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.Rxf6#
    • 1...Sf4
      • 2.Rxe5#
    • 1...Sh8
      • 2.Rxe5#
    • 1...Sh7
      • 2.Qxd7#
  • Tries
    • 1.Qxe7+?
      • 1...Sxe7
        • 2.Rxe5#
      • 1...Qxe7!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Qxf7#
      • 1...Qf5+
        • 2.gxf5#
      • 1...Qxe8
        • 2.Sg7#
      • 1...Qxf3
        • 2.Sg7#
      • 1...Qg8
        • 2.Rf6#
      • 1...Qf4
        • 2.Sg7#
      • 1...Qf6
        • 2.Rxf6#
      • 1...Qg7
        • 2.Sxg7#
      • 1...Qh7
        • 2.Rf6#
      • 1...Sf4
        • 2.Rxe5#
      • 1...Sh8
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(h);OGATE,XS(H)::R1(C),XQ(h)
    • S(e);N_GUARD::R1(A),XP(c)
    • S(i);N_GUARD::QAB1(I),XP(f)
  • Tries
    • Try
      • Q(I);CHECK,XP(g)
      • Vars
        • S(e);XQ(I)::R1(A),XP(c)
      • Refutation
        • Q(h);XQ(I)
  • Actual
    • S(H);
    • Threat
      • QAB1(I),XQ(h)
    • Vars
      • Q(h);CHECK,OGATE::P(D),XQ(h)
      • Q(h);N_GUARD,XQ(I)::S(H)
      • Q(h);N_GUARD,XR(C)::S(H)
      • Q(h);N_GUARD::R1(C)
      • Q(h);N_GUARD::S(H)
      • Q(h);N_GUARD::R1(C),XQ(h)
      • Q(h);N_GUARD::S(H),XQ(h)
      • S(e);N_GUARD::R1(A),XP(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).