MESON Chess Problem Database

Problem Display
PID: 90082 (k7/2B3p1/1p3brn/1NN3pQ/6p1/4P3/3P4/4K2R w K - 0 1)

Schirdewan, Ulrich

Die Schwalbe, 1949

k7/2B3p1/1p3brn/1NN3pQ/6p1/4P3/3P4/4K2R

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Qf3#
  • Tries
    • 1.Qxg4?
      • threat
        • 2.Qf3#
        • 2.Qc8#
        • 2.Qg2#
        • 2.Qa4#
        • 2.Qe4#
      • 1...bxc5
        • 2.Qf3#
        • 2.Qc8#
        • 2.Qg2#
        • 2.Qe4#
      • 1...Ba1
        • 2.Qc8#
        • 2.Qa4#
      • 1...Bb2
        • 2.Qc8#
        • 2.Qa4#
      • 1...Bc3
        • 2.Qc8#
      • 1...Bd4
        • 2.Qc8#
      • 1...Be5
        • 2.Qc8#
        • 2.Qa4#
      • 1...Be7
        • 2.Qc8#
        • 2.Qa4#
      • 1...Bd8
        • 2.Qc8#
        • 2.Qa4#
      • 1...Sf5
        • 2.Qf3#
        • 2.Qg2#
        • 2.Qa4#
        • 2.Qe4#
      • 1...Sxg4!
  • Keys
    • 1.0-0!
      • threat
        • 2.Qh1#
      • 1...Ba1
        • 2.Rxa1#
        • 2.Rf8#
      • 1...Bb2
        • 2.Rf8#
      • 1...Bc3
        • 2.Rf8#
      • 1...Bd4
        • 2.Rf8#
      • 1...Be5
        • 2.Rf8#
      • 1...Be7
        • 2.Ra1#
      • 1...Bd8
        • 2.Ra1#
      • 1...g3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE::QAB(G)
  • Tries
    • Try
      • Q(G);XP(a)
      • Threat
        • DUALS(5)
      • Vars
        • B(d);P_PINP(C)::QAR2(G)
        • B(d);::QAR2(G)
      • Refutation
        • S(f);XQ(G)
  • Actual
    • K(A);0-0
    • Threat
      • QAB(G)
    • Vars
      • B(d);OGATE::R(B)
      • B(d);OGATE,P_PINP(D)::R(B)
      • B(d);N_GUARD::R(B)
      • P(a);OGATE::QAB(G)
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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).