MESON Chess Problem Database

Problem Display
PID: 89895 (4r1r1/8/B6p/R4p2/K2pknpQ/pp1NnN2/1q4P1/4R3 w - - 0 1)

Laib, Kurt Friedrich

Die Schwalbe, 1949

4r1r1/8/B6p/R4p2/K2pknpQ/pp1NnN2/1q4P1/4R3

#2

8 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sf2#
      • 2.Sd2#
    • 1...Qc1
      • 2.Sf2#
    • 1...Qc3
      • 2.Sf2#
    • 1...Qb1
      • 2.Sf2#
      • 2.Sd2#
    • 1...Qd2
      • 2.Sxd2#
    • 1...Qf2
      • 2.Sxf2#
    • 1...Re5
      • 2.Rxe5#
    • 1...Ra8
      • 2.Re5#
    • 1...Rb8
      • 2.Re5#
    • 1...Rc8
      • 2.Re5#
    • 1...Rd8
      • 2.Re5#
    • 1...Ref8
      • 2.Re5#
    • 1...Se6
      • 2.Re5#
    • 1...gxf3
      • 2.Qxf4#
    • 1...g3
      • 2.Qxf4#
  • Tries
    • 1.Qe7+?
      • 1...Se6
        • 2.Re5#
        • 2.Qb7#
      • 1...Rxe7!
  • Keys
    • 1.Qxh6!
      • threat
        • 2.Qxf4#
      • 1...Sxg2
        • 2.Qc6#
      • 1...Sxd3
        • 2.Bb7#
      • 1...Sh3
        • 2.Qc6#
      • 1...Rg5
        • 2.Sxg5#
      • 1...Se2
        • 2.Sf2#
      • 1...Sd5
        • 2.Sc5#
      • 1...Sh5
        • 2.Qc6#
      • 1...Se6
        • 2.Re5#
      • 1...Sg6
        • 2.Sg5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_GUARD::S(C)
    • Q(a);N_GUARD::S(D),XQ(a)
    • Q(a);N_GUARD::S(C),XQ(a)
    • R(k);N_GUARD::R1(G),XR(k)
    • R(k);N_GUARD::R1(G)
    • S(g);P_SPINP(h),S_CUTR(k)::R1(G)
    • P(h);OGATE,XS(D)::QAR1(F),XS(g)
    • P(h);OGATE::QAR1(F),XS(g)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • R(k);XQ(F)
  • Actual
    • Q(F);XP(j)
    • Threat
      • QAR1(F),XS(g)
    • Vars
      • S(g);N_GUARD,XP(B)::QAB(F)
      • S(g);N_GUARD,SBLOCK,XS(C)::B(H)
      • S(g);N_GUARD::QAB(F)
      • R(l);N_GUARD::S(D),XR(l)
      • S(g);N_SPINS(d),S_CUTQ(a)::S(C)
      • S(g);SBLOCK::S(C)
      • S(g);S_CUTR(k)::R1(G)
      • S(g);S_CUTR(l)::S(D)
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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).