MESON Chess Problem Database

Problem Display
PID: 92122 (7b/4Q3/1pK3B1/3NPP2/3pkq2/3Rp3/8/4N3 w - - 0 1)

Wielgos, Oskar

Deutsche Schachblatter, 1982

7b/4Q3/1pK3B1/3NPP2/3pkq2/3Rp3/8/4N3

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.f6#
    • 1...Qxe5
      • 2.f6#
    • 1...Qh4
      • 2.f6#
    • 1...Bxe5
      • 2.Sf6#
    • 1...Bf6
      • 2.Sxf6#
  • Tries
    • 1.Rxe3+?
      • 1...Qxe3
        • 2.f6#
      • 1...dxe3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qxd4#
      • 1...Kxe5
        • 2.Qe7#
      • 1...Qxe5
        • 2.Rxe3#
      • 1...Bxe5
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(d);N_GUARD::B(G)+P(E)
    • Q(d);N_GUARD,P_SPINQ(d),XP(D)::B(G)+P(E)
    • B(f);N_GUARD,P_SPINB(f),XP(D)::S(C)
    • B(f);N_GUARD::S(C),XB(f)
  • Tries
    • Try
      • R(B);CHECK,XP(a)
      • Vars
        • Q(d);XR(B)::B(G)+P(E)
      • Refutation
        • P(b);XR(B)
  • Actual
    • Q(H);P_PINP(b)
    • Threat
      • QAR1(H),XP(b)
    • Vars
      • K(c);N_SPINP(b),OGATEB,P-FLIGHT,XP(D)::QAR2(H)
      • Q(d);N_GUARD,SBLOCK,XP(D)::R1(B),XP(a)
      • B(f);SBLOCK,XP(D)::S(C)
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).