MESON Chess Problem Database

Problem Display
PID: 229247 (1Q2n3/2rRK3/4p3/rb2kp2/3R4/4PB1n/8/8 w - - 0 1)

Kiszela, Geza

Nepszava, 1926

1Q2n3/2rRK3/4p3/rb2kp2/3R4/4PB1n/8/8

#2

6 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.exf4#
    • 1...Sd6
      • 2.Qh8#
    • 1...Sf6
      • 2.Qxc7#
    • 1...Sg7
      • 2.Qxc7#
  • Tries
    • 1.Rxc7?
      • threat
        • 2.Rc5#
      • 1...Sxc7
        • 2.Qxc7#
        • 2.Qh8#
      • 1...Ra7
        • 2.Qxb5#
      • 1...Bc6!
    • 1.Qxc7+?
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qc5#
      • 1...Sxc7!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Rc5#
      • 1...Bxc4
        • 2.Qb2#
      • 1...Bxd7
        • 2.Qb2#
      • 1...Ba4
        • 2.Qb2#
      • 1...Ba6
        • 2.Qb2#
      • 1...Bc6
        • 2.Qb2#
      • 1...Sf4
        • 2.exf4#
      • 1...Sd6
        • 2.Qh8#
      • 1...Sf6
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATE::P(A),XS(a)
    • S(h);N_SPINR(g),OGATE::QAB(F)
    • S(h);N_GUARD::QAB(F),XR(g)
  • Tries
    • Try
      • R(D);N_SPINR(D),XR(g)
      • Threat
        • QAB(F)+R(D),DCHECK
      • Vars
        • R(b);N_GUARD,P_PINR(D)::QAR(F),XB(c)
      • Refutation
        • B(c);
    • Try
      • Q(F);CHECK,N_SPINR(D),XR(g)
      • Refutation
        • S(h);XQ(F)
  • Actual
    • R(C);
    • Threat
      • R(C)
    • Vars
      • B(c);OGATE,XR(C)::QAB(F)
      • B(c);OGATE,XR(D)::QAB(F)
      • B(c);OGATE::QAB(F)
      • S(a);OGATE::P(A),XS(a)
      • S(h);N_SPINR(g),OGATE::QAB(F)
      • S(h);N_GUARD::QAB(F),XR(g)
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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).