MESON Chess Problem Database

Problem Display
PID: 154395 (Q7/3R2p1/4p1N1/3np3/2N1n2P/P4k1P/8/1B2K1R1 w - - 0 1)

McWilliam, Robert C

Hlas l'udu, 1988

(First published on Thu Oct 13 1988)

Q7/3R2p1/4p1N1/3np3/2N1n2P/P4k1P/8/1B2K1R1

#2

10 + 6

15393 McWilliam Scrapbook 2015
3713 Snap 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Rf7#
    • 1...Sf2
      • 2.Rf7#
    • 1...Sec3
      • 2.Rf7#
    • 1...Sc5
      • 2.Rf7#
    • 1...Sdc3
      • 2.Rd3#
      • 2.Rf7#
    • 1...Se3
      • 2.Sd2#
      • 2.Scxe5#
      • 2.Bxe4#
      • 2.Qxe4#
    • 1...Sb4
      • 2.Bxe4#
      • 2.Rf7#
      • 2.Qxe4#
    • 1...Sf4
      • 2.Sgxe5#
      • 2.Bxe4#
      • 2.Qxe4#
    • 1...Sb6
      • 2.Bxe4#
      • 2.Rd3#
      • 2.Rf7#
      • 2.Qxe4#
    • 1...Sf6
      • 2.Rd3#
    • 1...Sc7
      • 2.Bxe4#
      • 2.Rd3#
      • 2.Rf7#
      • 2.Qxe4#
    • 1...Se7
      • 2.Bxe4#
      • 2.Rd3#
      • 2.Qxe4#
  • Tries
    • 1.Rg4?
      • threat
        • 2.Sgxe5#
        • 2.Bxe4#
      • 1...Sd2
        • 2.Sgxe5#
        • 2.Rf7#
      • 1...Sf2
        • 2.Sgxe5#
        • 2.Rf7#
      • 1...Sec3
        • 2.Sgxe5#
        • 2.Rf7#
      • 1...Sc5
        • 2.Sgxe5#
        • 2.Rf7#
      • 1...Sg5
        • 2.Sgxe5#
      • 1...Sd6
        • 2.Sgxe5#
      • 1...Sef6
        • 2.Sgxe5#
      • 1...Sdc3
        • 2.Sgxe5#
        • 2.Rd3#
        • 2.Rf7#
      • 1...Sdf6
        • 2.Sgxe5#
        • 2.Rd3#
      • 1...Sg3!
    • 1.Rf7+?
      • 1...Sf4
        • 2.Sgxe5#
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Sdf6
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Sef6!
    • 1.Qa7?
      • threat
        • 2.Scxe5#
      • 1...Sb6
        • 2.Rd3#
      • 1...Sc5!
    • 1.Qf8+?
      • 1...Sf4
        • 2.Sgxe5#
        • 2.Rd3#
      • 1...Sdf6
        • 2.Rd3#
      • 1...Sef6!
  • Keys
    • 1.Rb7!
      • 1...Sd2
        • 2.Rf7#
      • 1...Sf2
        • 2.Rf7#
      • 1...Sec3
        • 2.Rf7#
      • 1...Sg3
        • 2.Rb3#
      • 1...Sc5
        • 2.Rf7#
      • 1...Sg5
        • 2.Rb3#
      • 1...Sd6
        • 2.Rb3#
      • 1...Sef6
        • 2.Rb3#
      • 1...Sdc3
        • 2.Rf7#
      • 1...Se3
        • 2.Scxe5#
      • 1...Sb4
        • 2.Rf7#
      • 1...Sf4
        • 2.Sgxe5#
      • 1...Sb6
        • 2.Rf7#
      • 1...Sdf6
        • 2.Rb3#
      • 1...Sc7
        • 2.Rb3#
      • 1...Se7
        • 2.Rb3#

Anticipated by 2722(1879)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,P_SPINS(c)::R(I)
    • S(c);OGATE,P_SPINS(b)::R(I)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);P_SPINS(c)::S(H),XP(d)
      • Refutation
        • S(b);P_SPINS(c)
    • Try
      • R(I);CHECK
      • Refutation
        • S(b);P_SPINS(c)
    • Try
      • Q(J);
      • Threat
        • S(F),XP(d)
      • Vars
        • S(c);OGATE::R(I)
      • Refutation
        • S(b);
    • Try
      • Q(J);CHECK
      • Vars
        • S(c);OGATE,P_SPINS(c)::R(I)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • R(I);
    • Vars
      • S(b);N_GUARD,S_CUTS(c),S_CUTS(c)::R(I)
      • S(c);N_GUARD,S_CUTS(b)::R(I)
      • S(c);SBLOCK::S(F),XP(d)
      • S(c);SBLOCK::S(H),XP(d)
HTML5 logo

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).