MESON Chess Problem Database

Problem Display
PID: 275487 (B6B/1rQpN3/4p2b/3r1N1q/3PkppR/R5pP/1nP3P1/1b4Kn w - - 0 1)

Novitski, Petr Adrinovich

Problemist Ukraini, 2023

B6B/1rQpN3/4p2b/3r1N1q/3PkppR/R5pP/1nP3P1/1b4Kn

#2

12 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qe5#
    • 1...Ra5
      • 2.Sd6#
    • 1...Rdb5
      • 2.Sd6#
    • 1...Rc5
      • 2.Sd6#
    • 1...Re5
      • 2.Qxe5#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rb3
      • 2.Qe5#
    • 1...Rb4
      • 2.Sd6#
      • 2.Qe5#
    • 1...Rbb5
      • 2.Sd6#
      • 2.Qe5#
    • 1...Rb6
      • 2.Qe5#
    • 1...Ra7
      • 2.Sd6#
      • 2.Qe5#
    • 1...Rxc7
      • 2.Sd6#
    • 1...Rb8
      • 2.Sd6#
      • 2.Qe5#
    • 1...f3
      • 2.gxf3#
    • 1...gxh3
      • 2.Re3#
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qe1#
      • 1...gxh3
        • 2.Qe3#
      • 1...f3
        • 2.Qxf3#
      • 1...Rb3
        • 2.Sd6#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(h);N_GUARD,P_SPINR(l),XP(F)::QAR1(I)
    • R(h);N_GUARD,P_SPINR(l)::S(H)
    • R(h);N_GUARD,P_SPINR(l)::QAR1(I),XR(h)
    • R(h);N_GUARD,P_SPINR(l)::S(H),XR(h)
    • R(l);P_SPINR(h)::QAR1(I)
    • R(l);P_SPINR(h),XQ(I)::S(H)
    • P(f);OGATE,P_SPINP(g)::P(C),XP(f)
    • P(g);P_SPINP(f),XP(E)::R1(D)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • P(g);P_SPINP(f),XP(E)::QAR1(I)
      • P(f);P_SPINP(g)::QAB1(I),XP(f)
      • R(l);P_SPINR(h)::S(H)
      • S(c);N_GUARD::QAB1(I)
      • S(c);N_GUARD::QAB1(I),XS(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).