MESON Chess Problem Database

Problem Display
PID: 135366 (5R1n/5N1B/3Pp1r1/4p1B1/4k3/5N1Q/3R2n1/6Kb w - - 0 1)

Laib, Kurt Friedrich

3rd Comm., Die Schwalbe, 1940

5R1n/5N1B/3Pp1r1/4p1B1/4k3/5N1Q/3R2n1/6Kb

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qg4#
    • 1...Sh4
      • 2.Qg4#
    • 1...Sxf7
      • 2.Bxg6#
  • Tries
    • 1.Sh4?
      • threat
        • 2.Qd3#
        • 2.Qf3#
      • 1...Sxh4
        • 2.Qg4#
        • 2.Qd3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Se1
        • 2.Qg4#
        • 2.Qe3#
      • 1...Sf4!
    • 1.Qxg2?
      • threat
        • 2.Qg4#
      • 1...Kf5
        • 2.Sh4#
      • 1...Bxg2!
    • 1.d7?
      • threat
        • 2.Sd6#
      • 1...Sxf7
        • 2.Bxg6#
      • 1...Sf4!
  • Keys
    • 1.Bh6!
      • 1...Se1+
        • 2.Qg4#
      • 1...Se3+
        • 2.S7g5#
      • 1...Sf4+
        • 2.S3g5#
      • 1...Sh4+
        • 2.Qg4#
      • 1...Sxf7
        • 2.Bxg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,P_PINB(E)::QAR2(D)
    • S(g);N_GUARD,XS(G)::B(H),XR(f)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD,P_PINB(E)::QAR1(D),XS(b)
      • Refutation
        • S(b);P_PINB(E)
    • Try
      • Q(D);XS(b)
      • Threat
        • QAR2(D)
      • Vars
        • K(c);S_FLIGHT::S(C)
      • Refutation
        • B(a);XQ(D)
    • Try
      • P(F);
      • Threat
        • S(G)
      • Vars
        • S(g);N_GUARD,XS(G)::B(H),XR(f)
      • Refutation
        • S(b);P_PINB(E)
  • Actual
    • B(E);
    • Vars
      • S(b);CHECK,N_GUARD::QAR2(D)
      • S(b);CHECK,SBLOCK::S(G)
      • S(b);CHECK,SBLOCK::S(C)
      • S(g);N_GUARD,XS(G)::B(H),XR(f)
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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).