MESON Chess Problem Database

Problem Display
PID: 119779 (1Q4nb/3bP3/1p3kP1/3P1p1K/1BP1pp2/8/8/8 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Dame und Laufer, 1911

1Q4nb/3bP3/1p3kP1/3P1p1K/1BP1pp2/8/8/8

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg7
      • 2.Qf8#
    • 1...Be6
      • 2.e8S#
    • 1...Bc8
      • 2.e8S#
    • 1...Sh6
      • 2.Qxh8#
    • 1...Sxe7
      • 2.Bc3#
      • 2.Qxh8#
  • Tries
    • 1.Qd6+?
      • 1...Be6
        • 2.Bc3#
        • 2.e8S#
      • 1...Kg7!
    • 1.Qxb6+?
      • 1...Ke5
        • 2.Bc3#
      • 1...Bc6
        • 2.Qd4#
      • 1...Be6
        • 2.Qd4#
      • 1...Kg7!
    • 1.Qa8?
      • threat
        • 2.Qa1#
      • 1...Ke5
        • 2.Qa1#
      • 1...Kg7
        • 2.Qf8#
      • 1...Ba4!
    • 1.Qd8?
      • threat
        • 2.Bc3#
      • 1...Kg7
        • 2.Qf8#
      • 1...Ke5!
    • 1.Qxg8?
      • threat
        • 2.Qxh8#
      • 1...Ke5
        • 2.Qxh8#
      • 1...Bg7!
    • 1.e8Q?
      • threat
        • 2.Bc3#
        • 2.Qbe5#
        • 2.Qf7#
        • 2.Qee5#
        • 2.Qf8#
      • 1...Kg7
        • 2.Qf7#
        • 2.Qf8#
      • 1...Be6
        • 2.Bc3#
      • 1...Bg7
        • 2.Bc3#
        • 2.Qbe5#
        • 2.Qf7#
        • 2.Qee5#
      • 1...Sh6
        • 2.Bc3#
        • 2.Qbe5#
        • 2.Qee5#
        • 2.Qe7#
        • 2.Qxh8#
      • 1...Se7
        • 2.Bc3#
        • 2.Qf7#
        • 2.Qxe7#
        • 2.Qf8#
        • 2.Qxh8#
      • 1...Bxe8!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qa1#
      • 1...Ke5
        • 2.Qa1#
      • 1...Kg7
        • 2.e8S#
      • 1...Ba4
        • 2.Bc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(e);S_FLIGHT::QAB1(G)
    • B(f);N_GUARD::P=S
    • S(g);OGATE::QAB(G),XB(h)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(G);CHECK,XP(d)
      • Vars
        • K(e);S_FLIGHT::B(A)
        • B(f);P_SPINB(f)::QAB(G)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • K(e);S_FLIGHT::QAB(G)
        • K(e);S_FLIGHT::QAB1(G)
      • Refutation
        • B(f);
    • Try
      • Q(G);
      • Threat
        • B(A)
      • Vars
        • K(e);S_FLIGHT::QAB1(G)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(G);XS(g)
      • Threat
        • QAB(G),XB(h)
      • Vars
        • K(e);S_FLIGHT::QAB(G),XB(h)
      • Refutation
        • B(h);
    • Try
      • P(F);
      • Threat
        • DUALS(5)
      • Vars
        • B(f);::B(A)
      • Refutation
        • B(f);P_PINP(E),XQ(F)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • K(e);S_FLIGHT::QAB(G)
      • K(e);S_FLIGHT::P=S
      • B(f);::B(A)
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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).