MESON Chess Problem Database

Problem Display
PID: 75547 (8/3pppp1/2p3p1/2B1kPQ1/1N6/1P2K3/8/8 w - - 0 1)

Laue, Kurt

Funkschach, 1926

8/3pppp1/2p3p1/2B1kPQ1/1N6/1P2K3/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...gxf5
      • 2.Qxe7#
    • 1...d5
      • 2.Sd3#
      • 2.Sxc6#
    • 1...d6
      • 2.Bd4#
    • 1...e6
      • 2.f6#
    • 1...f6
      • 2.Qf4#
  • Tries
    • 1.Kf3?
      • 1...gxf5
        • 2.Qxe7#
      • 1...d5
        • 2.Sd3#
        • 2.Sxc6#
      • 1...e6
        • 2.f6#
      • 1...f6
        • 2.Qf4#
      • 1...d6!
    • 1.fxg6+?
      • 1...f5
        • 2.Qxe7#
      • 1...Ke6!
  • Keys
    • 1.Sd3+!
      • 1...Kd5
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • P(c);P_SPINP(c),SBLOCK,XP(E)::QAR2(F),XP(e)
    • P(d);SBLOCK::B(D)
    • P(e);SBLOCK::QAR(F)+P(E)
    • P(f);SBLOCK::QAB1(F)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(c);P_SPINP(c),SBLOCK,XP(E)::QAR2(F),XP(e)
        • P(e);SBLOCK::QAR(F)+P(E)
        • P(f);SBLOCK::QAB1(F)
      • Refutation
        • P(d);
    • Try
      • P(E);CHECK,XP(c)
      • Vars
        • P(f);P_SPINP(f),SBLOCK::QAR2(F),XP(e)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);CHECK
    • Vars
      • K(a);P-FLIGHT::QAB(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).