MESON Chess Problem Database

Problem Display
PID: 261423 (2RK4/1p5p/n2k1P1r/3P2Rp/n1pBp2p/4rp2/4b3/4Q3 w - - 0 1)

Zipf, Volker

Neue Zurcher Zeitung, 2001

2RK4/1p5p/n2k1P1r/3P2Rp/n1pBp2p/4rp2/4b3/4Q3

#2

7 + 13

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...h3
      • 2.Qg3#
    • 1...b5
      • 2.Rc6#
    • 1...b6
      • 2.Rc6#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Be5#
      • 1...Rd3
        • 2.Qf4#
      • 1...Bd3
        • 2.Qh2#
      • 1...Sc7!
    • 1.Qxh4?
      • threat
        • 2.Qg3#
        • 2.Qh2#
        • 2.Qf4#
      • 1...f2
        • 2.Qf4#
      • 1...Rxf6!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Be5#
      • 1...S4c5
        • 2.Qb6#
      • 1...S6c5
        • 2.Qc7#
      • 1...b5
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(g);N_GUARD::QAB(A)
    • P(l);N_GUARD::R1(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • B(B)
      • Vars
        • R(b);OGATE::QAB(A)
        • B(a);OGATE::QAB(A)
      • Refutation
        • S(i);
    • Try
      • Q(A);XP(g)
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAB(A)
      • Refutation
        • R(k);XP(E)
  • Actual
    • Q(A);
    • Threat
      • B(B)
    • Vars
      • S(d);N_GUARD::QAR2(A)
      • S(i);N_GUARD::QAB1(A)
      • P(l);N_GUARD::R1(F)
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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).