MESON Chess Problem Database

Problem Display
PID: 165896 (8/7B/2pB4/1p6/8/1qPP3K/kP4QR/N6R w - - 0 1)

Witt, Andreas

Die Schwalbe, 2017

8/7B/2pB4/1p6/8/1qPP3K/kP4QR/N6R

#2

10 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.b3#
    • 1...Qc4
      • 2.b3#
    • 1...Qg8
      • 2.Bxg8#
      • 2.Qxg8#
    • 1...Qxb2
      • 2.Bg8#
      • 2.Qxb2#
      • 2.Qg8#
    • 1...Qa3
      • 2.bxa3#
    • 1...Qxc3
      • 2.bxc3#
  • Tries
    • 1.Bg8?
      • threat
        • 2.Bxb3#
      • 1...Qe6+
        • 2.Bxe6#
      • 1...Qxg8
        • 2.Qxg8#
      • 1...Qc4
        • 2.b3#
      • 1...Qf7
        • 2.Bxf7#
      • 1...Qd5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qxb3#
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Qxg8
        • 2.Bxg8#
      • 1...Qc4
        • 2.b3#
      • 1...Qd5
        • 2.Qa8#
      • 1...Qf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(b);OGATE::QAR(D)+P(C)
    • Q(b);OGATE::QAR(D)+P(C),XQ(b)
    • Q(b);OGATE,P_PINP(G),XP(F)::QAR(D)+P(C),XQ(b)
  • Tries
    • Try
      • B(J);P_PINQ(b)
      • Threat
        • B(J),XQ(b)
      • Vars
        • Q(b);CHECK,OGATEB::B(J),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XB(J)::QAB(D),XQ(b)
        • Q(b);OGATE::QAR(D)+P(C)
        • Q(b);OGATEB::B(J),XQ(b)
      • Refutation
        • Q(b);
  • Actual
    • Q(D);P_PINQ(b)
    • Threat
      • QAB1(D),XQ(b)
    • Vars
      • Q(b);CHECK,OGATEB::QAB(D),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XQ(D)::B(J),XQ(b)
      • Q(b);OGATE::R(E)+P(C)
      • Q(b);N_GUARD::QAR(D)
      • Q(b);OGATEB::QAB(D),XQ(b)
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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).