MESON Chess Problem Database

Problem Display
PID: 99189 (7B/4R2B/1K1pN1rn/1pp2kNp/5p1n/2pr3P/3qQ3/7b w - - 0 1)

Jakab, Arpad

Magyar Sakkelet, 1958

7B/4R2B/1K1pN1rn/1pp2kNp/5p1n/2pr3P/3qQ3/7b

#2

8 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Sg2
      • 2.Qe4#
    • 1...Sf3
      • 2.Qe4#
    • 1...Sf7
      • 2.Rxf7#
    • 1...f3
      • 2.Qe4#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.Qxd3+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Qxd3!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sg7#
      • 1...Bxe4
        • 2.Qxh5#
      • 1...f3
        • 2.Sg3#
      • 1...d5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(d);S_CUTB(a)::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
    • S(f);S_CUTB(a)::QAB1(A)
    • S(m);N_GUARD::R(F),XS(m)
    • P(e);S_CUTB(a)::QAB1(A)
    • P(k);N_GUARD,P_PINS(E)::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK,XR(d)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • Q(b);XQ(A)
  • Actual
    • S(C);
    • Threat
      • S(E)
    • Vars
      • B(a);SBLOCK,XS(C)::QAR2(A),XP(j)
      • P(e);N_GUARD,S_CUTR(d)::S(C)
      • P(k);P_PINS(E),S_CUTR(d)::S(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).