MESON Chess Problem Database

Problem Display
PID: 30914 (3q4/8/1B1pp3/1RN2pp1/1p1k2Pp/1P1PNQP1/3pPP2/3b3K w - - 0 1)

Dame, E

La Strategie, 1867

3q4/8/1B1pp3/1RN2pp1/1p1k2Pp/1P1PNQP1/3pPP2/3b3K

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Sd7#
    • 1...Qf6
      • 2.Sa4#
      • 2.Se4#
    • 1...Qe7
      • 2.Sa4#
      • 2.Se4#
    • 1...Qd7
      • 2.Sa4#
      • 2.Se4#
    • 1...Qa8
      • 2.Sa4#
      • 2.Se4#
    • 1...Qe8
      • 2.Sa4#
      • 2.Se4#
    • 1...Qf8
      • 2.Sa4#
      • 2.Se4#
    • 1...Qg8
      • 2.Sa4#
      • 2.Se4#
    • 1...Qh8
      • 2.Sa4#
      • 2.Se4#
  • Tries
    • 1.Sxd1?
      • threat
        • 2.Sxe6#
      • 1...Ke5
        • 2.Sd7#
      • 1...d5
        • 2.Qe3#
      • 1...e5
        • 2.Se6#
        • 2.Rxb4#
        • 2.e3#
      • 1...dxc5!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Sa4#
      • 1...exd5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qa1#
      • 1...Qxa8+
        • 2.Se4#
      • 1...Kc3
        • 2.Qa1#
      • 1...Ke5
        • 2.Sd7#
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);S_FLIGHT::R(J)+S(K),DCHECK
  • Tries
    • Try
      • S(F);XB(a)
      • Threat
        • B(L)+S(K),DCHECK,XP(i)
      • Vars
        • K(d);S_FLIGHT::R(J)+S(K),DCHECK
        • P(h);SBLOCK::QAB1(G)
      • Refutation
        • P(h);P_SPINP(h),XS(K)
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);S_FLIGHT::S(K)
      • Refutation
        • P(i);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • Q(j);CHECK,N_GUARD,XQ(G)::B(L)+S(K)
      • K(d);S_FLIGHT::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).