MESON Chess Problem Database

Problem Display
PID: 173269 (8/2Kp4/p7/pkB5/r1np4/1N1n4/2Q1B3/1R1r1b2 w - - 0 1)

Tikkanen, Tapani

Die Schwalbe, 1984

8/2Kp4/p7/pkB5/r1np4/1N1n4/2Q1B3/1R1r1b2

#2

6 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qxc4#
    • 1...Sxc5
      • 2.Sxd4#
    • 1...Sd2
      • 2.Sxd4#
    • 1...Sa3
      • 2.Sxd4#
    • 1...Se3
      • 2.Sxd4#
    • 1...Se5
      • 2.Sxd4#
    • 1...Sb6
      • 2.Sxd4#
    • 1...Sd6
      • 2.Sxd4#
  • Keys
    • 1.Bd6!
      • threat
        • 2.Sxd4#
      • 1...Sdb2
        • 2.Qf5#
      • 1...Sb4
        • 2.Qxc4#
      • 1...Scb2
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • S(c);P_SPINS(e),S_CUTR(d)::QAB1(B),XS(e)
    • S(c);P_SPINS(e),SBLOCK,XB(E)::R(A)+S(D),DCHECK,XP(f)
    • S(e);P_SPINS(c)::R(A)+S(D),DCHECK,XP(f)
  • Actual
    • B(E);
    • Threat
      • R(A)+S(D),DCHECK,XP(f)
    • Vars
      • S(c);OGATE,P_SPINS(e)::QAR(B)
      • S(c);P_SPINS(e),S_CUTR(d)::QAB1(B),XS(e)
      • S(e);OGATE,P_SPINS(c)::QAR1(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).