MESON Chess Problem Database

Problem Display
PID: 33175 (6BK/3bb1pp/1ppR3N/4k1Pq/1P2N1P1/n2P4/5Q2/3r1n2 w - - 0 1)

Howard, David M

Problem Observer, 2001

6BK/3bb1pp/1ppR3N/4k1Pq/1P2N1P1/n2P4/5Q2/3r1n2

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Sf7#
    • 1...Qf7
      • 2.Sxf7#
    • 1...Qh1
      • 2.Sf7#
    • 1...Qh2
      • 2.Sf7#
    • 1...Qh3
      • 2.Sf7#
    • 1...Qh4
      • 2.Sf7#
    • 1...Qxg5
      • 2.Sf7#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Be8
      • 2.Qf5#
    • 1...Sd2
      • 2.Qg3#
    • 1...Sh2
      • 2.Qg3#
    • 1...Se3
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
    • 1...c5
      • 2.Rd5#
    • 1...g6
      • 2.Sf7#
  • Tries
    • 1.Re6+?
      • 1...Kd5
        • 2.Sc3#
      • 1...Bxe6!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qd4#
      • 1...Kxd6
        • 2.Qf4#
      • 1...Qxg4
        • 2.Sf7#
      • 1...Bxd6
        • 2.d4#
      • 1...Se3
        • 2.Qg3#
      • 1...Sc2
        • 2.Sc4#
      • 1...Sb5
        • 2.Sc4#
      • 1...c5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • Q(e);N_GUARD,XP(E)::S(H)
    • Q(e);N_GUARD::S(H),XQ(e)
    • Q(e);N_GUARD::S(H)
    • Q(e);N_GUARD,XP(F)::S(H)
    • B(h);N_GUARD::QAR1(A),XB(h)
    • B(h);N_GUARD::QAR1(A)
    • S(b);N_GUARD::QAB(A)
    • S(b);N_GUARD::QAB(A),XS(b)
    • P(g);N_GUARD::R1(G)
    • P(j);S_CUTQ(e)::S(H)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(d);P-FLIGHT::S(D)
      • Refutation
        • B(h);XR(G)
  • Actual
    • S(D);
    • Threat
      • QAB1(A)
    • Vars
      • K(d);S_FLIGHT,XR(G)::QAB(A)
      • Q(e);N_GUARD,XP(E)::S(H)
      • B(i);SBLOCK,XR(G)::P(B)
      • S(b);N_GUARD::QAB(A)
      • S(c);N_GUARD::S(D)
      • P(g);N_GUARD::R1(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).