MESON Chess Problem Database

Problem Display
PID: 133811 (1B1N4/K1pQp3/1p1r4/bp4P1/1p1kP3/1P1P4/1PB3N1/3R4 w - - 0 1)

Kovalic, Jan

Hlas l'udu, 1981

1B1N4/K1pQp3/1p1r4/bp4P1/1p1kP3/1P1P4/1PB3N1/3R4

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qxd5#
    • 1...c5
      • 2.Sc6#
    • 1...e5
      • 2.Se6#
  • Tries
    • 1.Bxc7?
      • 1...Ke5
        • 2.Sc6#
        • 2.d4#
      • 1...Rxd7
        • 2.Se6#
      • 1...Rd5
        • 2.Se6#
        • 2.Qxd5#
      • 1...e5
        • 2.Se6#
        • 2.Qxd6#
      • 1...e6
        • 2.Qxd6#
      • 1...Kc5!
  • Keys
    • 1.Qxc7!
      • 1...Ke5
        • 2.d4#
      • 1...Rxd8
        • 2.Qe5#
      • 1...Rd5
        • 2.Se6#
      • 1...Rc6
        • 2.Qe5#
      • 1...Re6
        • 2.Sxe6#
      • 1...Rf6
        • 2.Qe5#
      • 1...Rg6
        • 2.Qe5#
      • 1...Rh6
        • 2.Qe5#
      • 1...Rd7
        • 2.Se6#
      • 1...e5
        • 2.Qxd6#
      • 1...e6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • R(f);OGATE::QAR1(J),XR(f)
    • P(g);SBLOCK::S(L)
    • P(h);SBLOCK::S(L)
  • Tries
    • Try
      • B(K);XP(g)
      • Vars
        • R(f);N_SPINR(f),P_PINB(K),XQ(J)::S(L)
        • P(h);N_GUARD::QAR2(J),XR(f)
      • Refutation
        • K(b);N_SPINR(f),S_FLIGHT
  • Actual
    • Q(J);N_PINR(f),XP(g)
    • Vars
      • K(b);OGATE,P_SPINR(f),S_FLIGHT::P(F)
      • R(f);OGATE,XS(L)::QAB1(J)
      • R(f);N_GUARD::S(L)
      • R(f);OGATE::QAB1(J)
      • R(f);N_GUARD::S(L),XR(f)
      • R(f);N_GUARD,P_PINQ(J)::S(L)
      • P(h);N_GUARD::QAR2(J),XR(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).