MESON Chess Problem Database

Problem Display
PID: 186700 (5R1N/6p1/4p1Bb/4k1qR/2P1p3/B2p3b/2NQ2n1/2Kn4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Chess, 1960

5R1N/6p1/4p1Bb/4k1qR/2P1p3/B2p3b/2NQ2n1/2Kn4

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sde3
      • 2.Qc3#
    • 1...Se1
      • 2.Qf4#
    • 1...Sge3
      • 2.Qh2#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sh4
      • 2.Qf4#
    • 1...dxc2
      • 2.Bd6#
    • 1...e3
      • 2.Qa5#
  • Tries
    • 1.Qxg5+?
      • 1...Bf5
        • 2.Sf7#
      • 1...Bxg5+!
  • Keys
    • 1.Be7!
      • threat
        • 2.Sf7#
      • 1...Sde3
        • 2.Qc3#
      • 1...Sge3
        • 2.Qh2#
      • 1...e3
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(a);N_PINQ(C)::QAB(C)
    • S(b);N_GUARD::QAB1(C)
    • S(b);N_PINQ(C)::QAB(C)
    • S(b);N_GUARD,N_PINQ(C)::QAB1(C),XS(b)
    • P(c);XS(B)::B(D)
    • P(e);N_PINQ(C)::QAR(C)
  • Tries
    • Try
      • Q(C);CHECK,XQ(g)
      • Vars
        • B(d);P_SPINB(d)::S(I)
      • Refutation
        • B(i);CHECK,P_SPINB(i),XQ(C)
  • Actual
    • B(D);
    • Threat
      • S(I)
    • Vars
      • S(a);N_PINQ(C)::QAB(C)
      • S(b);N_PINQ(C)::QAB(C)
      • P(e);N_PINQ(C)::QAR(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).