MESON Chess Problem Database

Problem Display
PID: 202997 (8/1b4nq/5pR1/2N1kp2/5p1N/3Q1P2/3P2K1/8 w - - 0 1)

Berhausen, Fritz

Funkschach, 1926

8/1b4nq/5pR1/2N1kp2/5p1N/3Q1P2/3P2K1/8

#2

7 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg6+
      • 2.Sxg6#
    • 1...Bxf3+
      • 2.Sxf3#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Sd3#
        • 2.d4#
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...Be4
        • 2.d4#
      • 1...Ba6
        • 2.d4#
      • 1...Se6
        • 2.Sd3#
      • 1...Bd5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.d4#
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...Bd5
        • 2.Qxf6#
      • 1...Se6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(g);CHECK,XR(G)::S(E),XQ(g)
    • B(e);CHECK,XP(D)::S(E),XB(e)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,XR(G)::S(E),XQ(g)
        • B(e);CHECK,XP(D)::S(E),XB(e)
        • B(e);::P(A)
        • B(e);N_PINP(D)::P(A)
        • S(f);::S(F)
      • Refutation
        • B(e);
  • Actual
    • Q(C);
    • Threat
      • P(A)
    • Vars
      • Q(g);CHECK,XR(G)::S(E),XQ(g)
      • B(e);CHECK,XP(D)::S(E),XB(e)
      • B(e);SBLOCK::QAB1(C),XP(d)
      • S(f);SBLOCK::S(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).