MESON Chess Problem Database

Problem Display
PID: 109907 (4NN1b/2prP1RP/2Pq3k/2pp3p/8/8/1Q4n1/1K6 w - - 0 1)

Turnauer, A

Caissa, 1980

4NN1b/2prP1RP/2Pq3k/2pp3p/8/8/1Q4n1/1K6

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Rg6#
      • 2.Qf6#
    • 1...Qf4
      • 2.Rg6#
    • 1...Qe5
      • 2.Rg6#
    • 1...Qxe7
      • 2.Rg6#
    • 1...Qf6
      • 2.Qxf6#
    • 1...Qg6+
      • 2.Rxg6#
    • 1...Bxg7
      • 2.Qxg7#
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qg5#
      • 1...Qg6+
        • 2.Rxg6#
      • 1...Qxe5
        • 2.Rg6#
      • 1...Qxe7
        • 2.Rg6#
      • 1...Bxg7
        • 2.Qxg7#
      • 1...Qf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(e);N_GUARD::R1(E)
    • Q(e);N_GUARD,XP(D)::R1(E)
    • Q(e);N_GUARD::QAR2(B),XQ(e)
    • Q(e);CHECK,N_GUARD::R1(E),XQ(e)
    • B(i);OGATE,XR(E)::QAB1(B),XB(i)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • Q(e);CHECK,N_GUARD::R1(E),XQ(e)
      • Q(e);N_GUARD,XQ(B)::R1(E)
      • Q(e);N_GUARD,XP(D)::R1(E)
      • B(i);OGATE,XR(E)::QAB1(B),XB(i)
      • Q(e);N_GUARD::QAR2(B),XQ(e)
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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).