MESON Chess Problem Database

Problem Display
PID: 15500 (8/Bpp2p2/1r3R1K/3B4/1N1kP3/1PpN3R/5r2/n5Qn w - - 0 1)

Quack, Godfrey C

The Problemist, 1984

8/Bpp2p2/1r3R1K/3B4/1N1kP3/1PpN3R/5r2/n5Qn

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Sxc2#
    • 1...Sxb3
      • 2.Sc2#
    • 1...Sg3
      • 2.Qxf2#
    • 1...c2
      • 2.Qxa1#
  • Tries
    • 1.Bxb6+?
      • 1...c5
        • 2.Bxc5#
      • 1...cxb6!
    • 1.Rd6?
      • 1...Sxb3
        • 2.Sc2#
      • 1...cxd6
        • 2.Bxb6#
      • 1...Sg3
        • 2.Qxf2#
      • 1...c2
        • 2.Qxa1#
      • 1...c5
        • 2.Bc6#
      • 1...Sc2
        • 2.Sxc2#
      • 1...c6
        • 2.Bxc6#
      • 1...f5
        • 2.Qg7#
      • 1...f6!
  • Keys
    • 1.Rc6!
      • 1...Sxb3
        • 2.Sc2#
      • 1...bxc6
        • 2.Sxc6#
      • 1...Sg3
        • 2.Qxf2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...c2
        • 2.Qxa1#
      • 1...f5
        • 2.Qg7#
      • 1...f6
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(E),XS(a)
    • S(a);N_GUARD,XP(B)::S(E)
    • S(b);N_GUARD::QAB(A),XR(c)
    • P(d);OGATEB::QAB(A),XS(a)
  • Tries
    • Try
      • B(J);CHECK,N_SPINR(H),XR(f)
      • Vars
        • P(h);P_SPINP(h)::B(J),XP(h)
      • Refutation
        • P(h);XB(J)
    • Try
      • R(H);
      • Vars
        • S(a);N_GUARD,XP(B)::S(E)
        • P(h);N_GUARD,XR(H)::B(J),XR(f)
        • S(b);N_GUARD::QAB(A),XR(c)
        • P(d);OGATEB::QAB(A),XS(a)
        • P(h);N_GUARD::R(H)+B(G)
        • S(a);N_GUARD::S(E),XS(a)
        • P(h);N_GUARD,N_PINR(H)::R(H)+B(G),XP(h)
        • P(i);N_GUARD::QAB(A)
      • Refutation
        • P(i);N_PINR(H)
  • Actual
    • R(H);
    • Vars
      • S(a);N_GUARD,XP(B)::S(E)
      • P(g);XR(H)::S(E),XP(g)
      • S(b);N_GUARD::QAB(A),XR(c)
      • S(a);N_GUARD::S(E),XS(a)
      • P(d);OGATEB::QAB(A),XS(a)
      • P(i);N_GUARD::QAB(A)
      • P(i);N_PINR(H)::R1(H)
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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).