MESON Chess Problem Database

Problem Display
PID: 172131 (Q2b1r2/p1k3qR/2N1P3/2P1R3/2N1n3/r7/p4P1B/K7 w - - 0 1)

Apro, Laszlo

Finkey, J

Prize, Radio Ujsag, 1937

Q2b1r2/p1k3qR/2N1P3/2P1R3/2N1n3/r7/p4P1B/K7

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Rxd7#
    • 1...Sc3
      • 2.Rf5#
    • 1...Sd6
      • 2.cxd6#
    • 1...Sf6
      • 2.Re3#
  • Tries
    • 1.Sxa7?
      • threat
        • 2.Sb5#
        • 2.Qc8#
      • 1...Rb3
        • 2.Qc8#
      • 1...Ra5
        • 2.Qc8#
      • 1...Bh4
        • 2.Sb5#
      • 1...Bg5
        • 2.Sb5#
      • 1...Bf6
        • 2.Sb5#
      • 1...Be7
        • 2.Sb5#
      • 1...Sc3
        • 2.Rf5#
        • 2.Qc8#
      • 1...Sd6
        • 2.cxd6#
      • 1...Rxa7!
    • 1.Rxg7+?
      • 1...Be7
        • 2.Rxe7#
      • 1...Rf7!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sd5#
      • 1...Rd3
        • 2.Sa6#
      • 1...Sc3
        • 2.Rf5#
      • 1...Sf6
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(f);N_PINR(F),OGATE::R1(I),XQ(f)
    • S(c);N_PINR(F)::B(C)+R(F)
    • S(c);OGATE::P(E),XS(c)
  • Tries
    • Try
      • S(G);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR1(J)
        • B(g);::S(G)
        • B(g);N_SPINQ(f)::S(G)
        • S(c);OGATE::P(E),XS(c)
      • Refutation
        • R(b);XS(G)
    • Try
      • R(I);CHECK,N_SPINR(F),XQ(f)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::R(I),XB(g)
      • Refutation
        • R(h);P_SPINR(h)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • R(b);N_GUARD::S(G)
      • S(c);N_PINR(F)::B(C)+R(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).