MESON Chess Problem Database

Problem Display
PID: 85772 (2KR4/4k1bN/4n3/4n3/8/4R3/8/5Q2 w - - 0 1)

Speckmann, Werner

Berliner Morgenpost, 1961

2KR4/4k1bN/4n3/4n3/8/4R3/8/5Q2

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Qxf6#
    • 1...Bh6
      • 2.Qf6#
    • 1...Bf8
      • 2.Qf6#
  • Tries
    • 1.Rxe5?
      • 1...Bf6
        • 2.Qxf6#
      • 1...Bh6
        • 2.Qf6#
      • 1...Bf8
        • 2.Qf6#
        • 2.Qxf8#
      • 1...Bh8
        • 2.Qf8#
      • 1...Bxe5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qe8#
      • 1...Kf7
        • 2.Qe8#
      • 1...Sxd8
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sc7
        • 2.Qd7#
      • 1...Sc6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(d);N_GUARD::QAB1(A),XB(d)
    • B(d);N_GUARD::QAB1(A)
  • Tries
    • Try
      • R(B);P_PINS(b),XS(a)
      • Vars
        • B(d);N_GUARD::QAB1(A),XB(d)
        • B(d);N_GUARD::QAB1(A)
      • Refutation
        • B(d);N_SPINS(b),XR(B)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);P-FLIGHT::QAB1(A)
      • S(b);P_SPINS(a),XR(E)::QAR1(A)
      • S(a);N_GUARD,P_SPINS(b)::QAR1(A),XS(a)
      • S(b);P_SPINS(a)::QAR1(A)
      • S(a);N_GUARD,P_SPINS(b)::QAR(A)
HTML5 logo

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).