MESON Chess Problem Database

Problem Display
PID: 189885 (8/1bRp4/pnP1r3/2k1NN2/P3P3/b5p1/5nK1/1Q6 w - - 0 1)

Dunka, Gyorgy Jusztin

Pesti Naplo, 1912

8/1bRp4/pnP1r3/2k1NN2/P3P3/b5p1/5nK1/1Q6

#2

8 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.cxb7#
    • 1...Re7
      • 2.cxb7#
    • 1...Re8
      • 2.cxb7#
    • 1...Sc4
      • 2.Sxd7#
    • 1...a5
      • 2.Qb5#
    • 1...d6
      • 2.cxb7#
  • Tries
    • 1.Sd3+?
      • 1...Kc4
        • 2.Qc2#
      • 1...Sxd3!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qa5#
      • 1...Rxe5
        • 2.cxb7#
      • 1...Sc4
        • 2.Sxd7#
      • 1...Bb4
        • 2.Qe3#
      • 1...a5
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD,XS(E)::R(H)+P(G),XB(h)
    • R(g);N_GUARD::R(H)+P(G),XB(h)
    • S(f);N_GUARD,SBLOCK::S(E),XP(i)
    • P(e);N_GUARD::QAR1(A)
    • P(i);S_CUTR(g)::R(H)+P(G),XB(h)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • S(a);XS(E)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • R(g);N_GUARD,XS(E)::R(H)+P(G),XB(h)
      • S(f);N_GUARD,SBLOCK::S(E),XP(i)
      • B(b);SBLOCK::QAB(A)
      • P(e);::QAR2(A),XP(e)
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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).