MESON Chess Problem Database

Problem Display
PID: 204558 (5R1n/KQ3q1n/3pbk1P/3P1p1P/5B2/7N/8/6R1 w - - 0 1)

Ballo, Gyorgy

Ujsag, 1925

5R1n/KQ3q1n/3pbk1P/3P1p1P/5B2/7N/8/6R1

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.Rxg6#
  • Tries
    • 1.Rxf7+?
      • 1...Sxf7
        • 2.Rg6#
      • 1...Bxf7!
  • Keys
    • 1.Re1!
      • threat
        • 2.Rxe6#
      • 1...Bxd5
        • 2.Qe7#
      • 1...Sxf8
        • 2.Bg5#
      • 1...Bd7
        • 2.Qb2#
      • 1...Bc8
        • 2.Qe7#
      • 1...Sg5
        • 2.Bxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(g);N_GUARD::R1(A),XS(g)
  • Tries
    • Try
      • R(I);CHECK,N_SPINQ(H),XQ(e)
      • Vars
        • S(g);XR(I)::R1(A)
      • Refutation
        • B(c);XR(I)
  • Actual
    • R(A);
    • Threat
      • R1(A),XB(c)
    • Vars
      • B(c);XP(D)::QAB1(H)
      • S(f);N_GUARD,N_SPINQ(e),XR(I)::B(C)
      • B(c);N_PINQ(H)::QAB(H)
      • B(c);::QAB1(H)
      • S(f);N_GUARD::B(C),XS(f)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).