MESON Chess Problem Database

Problem Display
PID: 85697 (3k1K2/r4p2/2QN4/8/6b1/B7/8/8 w - - 0 1)

Speckmann, Werner

Europe Echecs, 1966

3k1K2/r4p2/2QN4/8/6b1/B7/8/8

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Sb7#
      • 2.Sxf7#
    • 1...Ra4
      • 2.Sb7#
      • 2.Sxf7#
    • 1...Ra5
      • 2.Sb7#
      • 2.Sxf7#
    • 1...Ra6
      • 2.Sb7#
      • 2.Sxf7#
    • 1...Rb7
      • 2.Sxb7#
    • 1...Rc7
      • 2.Qe8#
    • 1...Rd7
      • 2.Qc8#
    • 1...Ra8
      • 2.Sb7#
      • 2.Sxf7#
    • 1...Bd1
      • 2.Qc8#
    • 1...Be2
      • 2.Qc8#
    • 1...Bf3
      • 2.Qc8#
    • 1...Bh5
      • 2.Qc8#
    • 1...Bd7
      • 2.Sxf7#
    • 1...Bc8
      • 2.Qxc8#
    • 1...f5
      • 2.Qc8#
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qe8#
      • 1...Rd7
        • 2.Qa8#
      • 1...Re7
        • 2.Bxe7#
      • 1...Bd7
        • 2.Be7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::S(C),XR(b)
    • R(b);SBLOCK::QAR1(B)
    • R(b);S_CUTB(a)::QAR1(B)
    • B(a);N_GUARD::QAR1(B)
    • B(a);S_CUTR(b)::S(C),XP(c)
    • B(a);N_GUARD::QAR1(B),XB(a)
    • P(c);S_CUTB(a)::QAR1(B)
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • R(b);N_GUARD,SBLOCK,S_CUTB(a)::QAR(B)
      • R(b);N_GUARD::B(A),XR(b)
      • B(a);S_CUTR(b)::B(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).