MESON Chess Problem Database

Problem Display
PID: 89957 (8/2p1p3/2p1Kp2/P1k3B1/1p1N1p2/1P2P3/5p1Q/8 w - - 0 1)

Michael, John

Die Schwalbe, 1991

8/2p1p3/2p1Kp2/P1k3B1/1p1N1p2/1P2P3/5p1Q/8

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f1S
      • 2.Qc2#
    • 1...f1R
      • 2.Qc2#
    • 1...f5
      • 2.Bxe7#
  • Tries
    • 1.Bxf6?
      • threat
        • 2.Bxe7#
        • 2.Qh5#
      • 1...fxe3
        • 2.Qe5#
        • 2.Qh5#
      • 1...exf6!
    • 1.Qh1?
      • threat
        • 2.Qxc6#
        • 2.Qc1#
      • 1...f1Q
        • 2.Qxc6#
      • 1...f1S
        • 2.Qxc6#
      • 1...f1B
        • 2.Qxc6#
      • 1...f1R
        • 2.Qxc6#
      • 1...f3
        • 2.Qc1#
      • 1...fxe3!
    • 1.Qh3?
      • threat
        • 2.Qf5#
      • 1...f5
        • 2.Bxe7#
        • 2.Qxf5#
      • 1...fxe3!
    • 1.Qh7?
      • threat
        • 2.Qc2#
        • 2.Qf5#
        • 2.Qxe7#
      • 1...f1Q
        • 2.Qf5#
        • 2.Qxe7#
      • 1...f1B
        • 2.Qf5#
        • 2.Qxe7#
      • 1...f5
        • 2.Bxe7#
        • 2.Qxf5#
        • 2.Qxe7#
      • 1...fxe3!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Bxf6#
      • 1...fxg5
        • 2.Qxg5#
      • 1...f5
        • 2.Bxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • P(a);OGATE::QAR(A)
    • P(f);OGATE::B(F),XP(h)
  • Tries
    • Try
      • B(F);XP(f)
      • Threat
        • DUALS(2)
      • Refutation
        • P(h);XB(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(A),XP(e)
        • P(c);::QAR(A)
      • Refutation
        • P(c);XP(C)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Refutation
        • P(c);XP(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • P(c);XP(C)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+B(F),XP(f)
    • Vars
      • P(f);OGATE,P_SPINP(f),XB(F)::QAR(A),XP(f)
      • P(f);OGATE::B(F),XP(h)
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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).