MESON Chess Problem Database

Problem Display
PID: 275841 (8/1B2K3/5R2/8/1NN5/7p/3pk1rR/1Q2bbn1 w - - 0 1)

Andersson, Harry

Schackvarlden, 1935

8/1B2K3/5R2/8/1NN5/7p/3pk1rR/1Q2bbn1

#2

7 + 7

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Re6#
    • 1...Bg3
      • 2.Qxf1#
    • 1...Bh4
      • 2.Qxf1#
    • 1...d1Q
      • 2.Qe4#
    • 1...d1S
      • 2.Qd3#
    • 1...d1B
      • 2.Qd3#
      • 2.Qe4#
    • 1...d1R
      • 2.Qe4#
  • Tries
    • 1.Sa2?
      • threat
        • 2.Sc3#
      • 1...d1Q
        • 2.Qe4#
      • 1...d1S
        • 2.Sc1#
      • 1...d1B
        • 2.Sc1#
        • 2.Qe4#
      • 1...d1R
        • 2.Qe4#
      • 1...Sf3!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Re6#
      • 1...d1S
        • 2.Sc1#
      • 1...Bf2
        • 2.Sf4#
      • 1...Bg3
        • 2.Qxf1#
      • 1...Bh4
        • 2.Qxf1#
      • 1...Sf3
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(f);::R(E)
    • B(a);OGATE::QAB1(A),XB(b)
    • B(a);OGATE,P_PINR(E)::QAB1(A),XB(b)
    • P(d);SBLOCK::QAR2(A)
    • P(d);::QAB1(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • P(d);SBLOCK::QAR2(A)
        • P(d);N_GUARD,SBLOCK::S(C)
      • Refutation
        • S(c);
  • Actual
    • S(C);
    • Threat
      • R(E)
    • Vars
      • P(d);N_GUARD,SBLOCK::S(C)
      • B(a);N_SPINR(f),SBLOCK::S(C)
      • B(a);OGATE::QAB1(A),XB(b)
      • B(a);OGATE,P_PINR(E)::QAB1(A),XB(b)
      • S(c);N_GUARD::B(F),XS(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).