MESON Chess Problem Database

Problem Display
PID: 200665 (2Q5/3p4/8/5p2/1N2kP2/4P2K/1b1r1PP1/q2r1n1N w - - 0 1)

Friedberg, P

Vatarescu, Paul

Stella Polaris, 1967

2Q5/3p4/8/5p2/1N2kP2/4P2K/1b1r1PP1/q2r1n1N

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qe8#
    • 1...Sh2
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
  • Tries
    • 1.Qc4+?
      • 1...Bd4
        • 2.Qd5#
      • 1...Rd4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.f3#
      • 1...Rxf2
        • 2.Sxf2#
      • 1...Sxe3
        • 2.Qxe3#
      • 1...Rd4
        • 2.Qe7#
        • 2.Qe5#
      • 1...Bd4
        • 2.Qd5#
      • 1...Sh2
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(e);S_CUTB(d)::QAR(H)
    • S(c);N_GUARD::S(A)
    • S(c);N_GUARD::S(A),XS(c)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • B(d);P_SPINB(d),S_CUTR(e)::QAB1(H)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • Q(H);
    • Threat
      • P(B)
    • Vars
      • R(e);XP(B)::S(A),XR(e)
      • S(c);OGATE,XP(D)::QAR1(H),XS(c)
      • B(d);S_CUTR(e)::QAB1(H)
      • S(c);N_GUARD::S(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).