MESON Chess Problem Database

Problem Display
PID: 232556 (2K5/1N1B1p2/3R3B/2p1k1Nb/4P3/Q6p/3n3q/b7 w - - 0 1)

Gruber, Lutz-Dieter

Freie Presse, 1989

2K5/1N1B1p2/3R3B/2p1k1Nb/4P3/Q6p/3n3q/b7

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Qxg3#
    • 1...Qf4
      • 2.Qxc5#
      • 2.Qxa1#
    • 1...Qh1
      • 2.Qg3#
    • 1...Qe2
      • 2.Qg3#
  • Tries
    • 1.Sxf7+?
      • 1...Kxe4
        • 2.Sxc5#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Bxf7!
    • 1.Qc3+?
      • 1...Kf4
        • 2.Rf6#
      • 1...Bxc3!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Sd3#
      • 1...Kf4
        • 2.Sxf7#
      • 1...Kxd6
        • 2.Sd3#
      • 1...Qg3
        • 2.Qxg3#
      • 1...Qe2
        • 2.Qg3#
      • 1...Be2
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::QAB(A),XQ(c)
    • Q(c);N_GUARD::QAB(A)
  • Tries
    • Try
      • S(C);CHECK,XP(h)
      • Refutation
        • B(g);XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);S_FLIGHT::R(D)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • S(F);XP(e)
    • Threat
      • S(F)
    • Vars
      • K(f);S_FLIGHT::B(E)+S(C),XP(h)
      • K(f);S_FLIGHT,XR(D)::QAB(A)+S(F)
      • Q(c);N_GUARD::QAB(A),XQ(c)
      • Q(c);N_GUARD::QAB(A)
      • B(g);N_GUARD::S(C),XP(h)
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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).