MESON Chess Problem Database

Problem Display
PID: 145343 (K5B1/1pP2n2/R3N3/p2k1p2/1bN4Q/1n1P4/4R3/q7 w - - 0 1)

Sheppard, Charles William

Comm., American Chess Bulletin, 1942

K5B1/1pP2n2/R3N3/p2k1p2/1bN4Q/1n1P4/4R3/q7

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qh1#
    • 1...Qc3
      • 2.Qh1#
    • 1...Qf6
      • 2.Qh1#
    • 1...Qh1
      • 2.Qxh1#
    • 1...Qa2
      • 2.Qh1#
    • 1...Qa3
      • 2.Qh1#
    • 1...Qa4
      • 2.Qh1#
    • 1...Be1
      • 2.Qh1#
    • 1...Sc1
      • 2.Qh1#
    • 1...Se5
      • 2.Se3#
  • Tries
    • 1.Re5+?
      • 1...Sxe5
        • 2.Se3#
      • 1...Qxe5!
  • Keys
    • 1.c8Q!
      • threat
        • 2.Qxb7#
      • 1...bxa6
        • 2.Qb7#
      • 1...Qa4
        • 2.Qh1#
      • 1...Sd4
        • 2.Sf4#
      • 1...Sc5
        • 2.Sc7#
      • 1...Se5
        • 2.Se3#
      • 1...Sd6
        • 2.Sb6#
      • 1...Sd8
        • 2.Sxd8#
      • 1...b5
        • 2.Qb7#
        • 2.Qc6#
      • 1...b6
        • 2.Qb7#

This is a version

Version by E. Ferron.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::QAB(D)
    • Q(a);N_GUARD::QAB(D),XQ(a)
    • B(c);S_CUTQ(a)::QAB(D)
    • S(b);S_CUTQ(a)::QAB(D)
    • S(h);SBLOCK::S(C)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • S(h);SBLOCK,XR(A)::S(C)
      • Refutation
        • Q(a);XR(A)
  • Actual
    • P(G);
    • Threat
      • QAB(G),XP(g)
    • Vars
      • P(g);XR(E)::QAB(G)
      • Q(a);N_GUARD::QAB(D)
      • S(b);SBLOCK::S(F)
      • S(h);SBLOCK::S(C)
      • S(h);::B(I)+S(F),XS(h)
      • P(g);::QAB(G)
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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).