MESON Chess Problem Database

Problem Display
PID: 121308 (8/4Kb2/8/4Q1Rq/7k/4p2p/5n1N/5r1n w - - 0 1)

Cumpe, Josef

Jas, 1929

8/4Kb2/8/4Q1Rq/7k/4p2p/5n1N/5r1n

#2

4 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qg6
      • 2.Sf3#
    • 1...Qh6
      • 2.Sf3#
    • 1...Qh7
      • 2.Sf3#
    • 1...Qh8
      • 2.Sf3#
    • 1...Ba2
      • 2.Rxh5#
    • 1...Bb3
      • 2.Rxh5#
    • 1...Bc4
      • 2.Rxh5#
    • 1...Bd5
      • 2.Rxh5#
    • 1...Be6
      • 2.Rxh5#
    • 1...Bg8
      • 2.Rxh5#
    • 1...Sg3
      • 2.Qxg3#
  • Tries
    • 1.Qf4+?
      • 1...Qg4
        • 2.Sf3#
      • 1...Sg4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Sf3#
      • 1...Kxg5
        • 2.Qf6#
      • 1...Sg4
        • 2.Rxg4#
      • 1...Bd5
        • 2.Qxh5#
      • 1...Sd1
        • 2.Rg4#
      • 1...Sd3
        • 2.Rg4#
      • 1...Se4
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 11
  • Sets
    • Q(g);N_GUARD::S(A),XQ(g)
    • Q(g);N_GUARD::S(A)
    • B(h);N_GUARD::R1(C),XQ(g)
    • S(b);N_GUARD::QAB1(B),XS(b)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • Q(g);P_SPINQ(g)::S(A)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(B);P_PINQ(g)
    • Threat
      • S(A)
    • Vars
      • K(f);N_SPINQ(g),OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • S(c);N_GUARD::R1(C),XS(c)
      • B(h);N_GUARD::QAR1(B),XQ(g)
      • S(c);N_GUARD::R1(C)
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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).