MESON Chess Problem Database

Problem Display
PID: 110746 (8/8/1p2pK2/1P2B1P1/2P1k3/7Q/3P1Pn1/4n2b w - - 0 1)

Kubbel, Evgeny Ivanovich

Shakhmatny Listok, 1926

8/8/1p2pK2/1P2B1P1/2P1k3/7Q/3P1Pn1/4n2b

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.d3#
    • 1...Sd3
      • 2.f3#
    • 1...Sf3
      • 2.Qh7#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sf4
      • 2.Qe3#
    • 1...Sh4
      • 2.Qe3#
  • Tries
    • 1.Kxe6?
      • threat
        • 2.Qf5#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sf4+!
    • 1.Qb3?
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc2
        • 2.f3#
      • 1...Sf3
        • 2.Qc2#
        • 2.Qb1#
        • 2.d3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sd3!
    • 1.Qc3?
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc2
        • 2.f3#
      • 1...Sf3
        • 2.Qc2#
        • 2.d3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sd3!
    • 1.Qg3?
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc2
        • 2.d3#
      • 1...Sd3
        • 2.f3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sf3!
    • 1.f3+?
      • 1...Sxf3
        • 2.Qh7#
      • 1...Kd3!
    • 1.f4?
      • 1...Sxf4
        • 2.Qe3#
      • 1...Sf3
        • 2.Qh7#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc2
        • 2.d3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sd3!
    • 1.g6?
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc2
        • 2.d3#
      • 1...Sd3
        • 2.f3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sf3!
  • Keys
    • 1.Qa3!
      • 1...Sd3
        • 2.Qa8#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc2
        • 2.f3#
      • 1...Sf3
        • 2.d3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::P(A)
    • S(a);N_GUARD,SBLOCK::P(B)
    • S(a);SBLOCK::QAB(C)
    • S(c);N_GUARD::QAR1(C),XS(c)
    • S(c);N_GUARD::QAR1(C)
  • Tries
    • Try
      • K(H);P-FLIGHT,XP(f)
      • Threat
        • QAB1(C)
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);CHECK
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::P(B)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::P(B)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::P(A)
        • S(a);N_GUARD,SBLOCK::P(B)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • P(B);CHECK
      • Vars
        • S(a);SBLOCK,XP(B)::QAB(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • P(B);
      • Vars
        • S(c);N_GUARD,XP(B)::QAR1(C)
        • S(a);SBLOCK::QAB(C)
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::P(A)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • P(G);
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(a);N_GUARD::P(A)
        • S(a);N_GUARD,SBLOCK::P(B)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Vars
      • S(a);SBLOCK::QAB(C)
      • S(c);N_GUARD::QAR1(C),XS(c)
      • S(a);N_GUARD::P(B)
      • S(a);N_GUARD,SBLOCK::P(A)
      • S(c);N_GUARD::QAR1(C)
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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).