MESON Chess Problem Database

Problem Display
PID: 260738 (5k1K/3R4/6B1/5r1n/8/5b2/5Q2/8 w - - 0 1)

Speckmann, Werner

Neue Zurcher Zeitung, 1959

5k1K/3R4/6B1/5r1n/8/5b2/5Q2/8

#2

4 + 4

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Qc5#
    • 1...Rc5
      • 2.Qxc5#
    • 1...Bd5
      • 2.Qc5#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Qd8#
        • 2.Qd6#
        • 2.Qb8#
      • 1...Rf7
        • 2.Qd8#
        • 2.Qb8#
      • 1...Rb5
        • 2.Qd8#
        • 2.Qd6#
      • 1...Rc5
        • 2.Qxc5#
        • 2.Qd8#
        • 2.Qd6#
      • 1...Rd5
        • 2.Qd8#
        • 2.Qb8#
      • 1...Rf6
        • 2.Qd8#
        • 2.Qb8#
      • 1...Bc6
        • 2.Qd8#
        • 2.Qb8#
      • 1...Bb7
        • 2.Qd8#
        • 2.Qd6#
      • 1...Sf6
        • 2.Qd6#
      • 1...Sg7
        • 2.Qd6#
      • 1...Re5!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qg8#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Rd5
        • 2.Qa8#
      • 1...Bd5
        • 2.Qa3#
      • 1...Sf6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::QAB(A)
    • R(b);N_GUARD,P_SPINB(a)::QAB(A),XR(b)
    • B(a);P_SPINR(b)::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);::QAB(A)
      • Refutation
        • R(b);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(b);N_GUARD::QAR1(A),XR(b)
      • R(b);S_CUTB(a)::QAR(A)
      • B(a);S_CUTR(b)::QAB(A)
      • S(c);S_CUTR(b)::QAR1(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).