MESON Chess Problem Database

Problem Display
PID: 89751 (1Kn5/2Q5/1p1P1r2/4k1Pp/3r1NP1/p4P2/B3N3/2B5 w - - 0 1)

Brabec, Juraj

Die Schwalbe, 1962

1Kn5/2Q5/1p1P1r2/4k1Pp/3r1NP1/p4P2/B3N3/2B5

#2

10 + 7

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sxd3#
    • 1...Ra4
      • 2.Sd3#
    • 1...Rb4
      • 2.Sd3#
    • 1...Re4
      • 2.Sd3#
    • 1...Rdxd6
      • 2.Sd3#
    • 1...Rf5
      • 2.Sg6#
    • 1...Rfxd6
      • 2.Sg6#
    • 1...Rg6
      • 2.Sxg6#
    • 1...Rf7
      • 2.Sg6#
    • 1...Rf8
      • 2.Sg6#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qxd4#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Rxf4
        • 2.Bxf4#
      • 1...Rxd6
        • 2.Sd3#
      • 1...hxg4!
    • 1.Qc5+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...bxc5!
    • 1.Qe7+?
      • 1...Re6
        • 2.Sg6#
        • 2.Qxe6#
      • 1...Sxe7!
    • 1.d7+?
      • 1...Rdd6
        • 2.Sd3#
      • 1...Rfd6
        • 2.Sg6#
      • 1...Sd6!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qxf6#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Rxf4
        • 2.Bxf4#
      • 1...Rxd6
        • 2.Sg6#

This anticipates 147322(1984)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::S(E),XR(b)
    • R(b);N_GUARD::S(E)
    • R(b);N_GUARD,P_SPINR(b),XP(H)::S(E)
    • R(f);N_GUARD::S(E)
    • R(f);N_GUARD,P_SPINR(f),XP(H)::S(E)
    • R(f);N_GUARD::S(E),XR(f)
  • Tries
    • Try
      • Q(I);P_PINR(b)
      • Threat
        • QAB1(I),XR(b)
      • Vars
        • K(c);N_SPINR(b),OGATEB,S_FLIGHT,XP(H)::QAB1(I)
        • R(f);OGATE,XS(E)::B(A),XR(f)
        • R(f);SBLOCK,XP(H)::S(E)
      • Refutation
        • P(d);XP(F)
    • Try
      • Q(I);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(I),XR(b)
      • Refutation
        • P(e);XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • S(g);XQ(I)
    • Try
      • P(H);CHECK
      • Vars
        • R(b);P_SPINR(b)::S(E)
        • R(f);P_SPINR(f)::S(E)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • Q(I);P_PINR(f)
    • Threat
      • QAB1(I),XR(f)
    • Vars
      • K(c);N_SPINR(f),OGATEB,S_FLIGHT,XP(H)::QAB1(I)
      • R(b);OGATE,XS(E)::B(A),XR(b)
      • R(b);SBLOCK,XP(H)::S(E)
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).