MESON Chess Problem Database

Problem Display
PID: 244173 (K7/4B1p1/4N1r1/R2Pk3/3rPpP1/8/3N1pq1/4Q3 w - - 0 1)

Brabec, Juraj

Pravda, 1971

K7/4B1p1/4N1r1/R2Pk3/3rPpP1/8/3N1pq1/4Q3

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sf3#
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qxe4
      • 2.Sf3#
    • 1...Qg1
      • 2.Sf3#
    • 1...Qh2
      • 2.Sf3#
    • 1...Rd3
      • 2.Sc4#
    • 1...Rc4
      • 2.Sxc4#
    • 1...Rxe4
      • 2.Sc4#
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxd4#
      • 1...Qxe4
        • 2.Sc4#
      • 1...Rxe6
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(b);N_GUARD::S(B)
    • Q(b);N_GUARD::S(B),XQ(b)
    • Q(b);N_GUARD,P_PINP(F),P_SPINQ(b),XP(C)::S(B)
    • R(c);N_GUARD::S(B)
    • R(c);N_GUARD::S(B),XR(c)
    • R(c);N_GUARD,P_SPINR(c),XP(C)::S(B)
  • Actual
    • Q(A);P_PINR(c)
    • Threat
      • QAB1(A),XR(c)
    • Vars
      • Q(b);P_PINP(F),SBLOCK,XP(C)::S(B)
      • R(f);SBLOCK,XS(G)::R(E)+P(F)
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).