MESON Chess Problem Database

Problem Display
PID: 231250 (4NrN1/3P1k1p/K7/5p1P/2R5/p5Qp/B6r/2b2b2 w - - 0 1)

Ellerman, Arnoldo

Hartong, Jan

La Prensa, 1927

4NrN1/3P1k1p/K7/5p1P/2R5/p5Qp/B6r/2b2b2

#2

8 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Re4#
    • 1...Bxc4+
      • 2.Bxc4#
    • 1...h6
      • 2.Qg6#
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qd5#
      • 1...Bxc4+
        • 2.Bxc4#
      • 1...Kxg8
        • 2.Qg7#
      • 1...Rxe8
        • 2.dxe8Q#
      • 1...Rxg8
        • 2.Qf6#
      • 1...Rd2
        • 2.Sh6#
      • 1...Re2
        • 2.Rc2#
      • 1...Bg2
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(b);N_PINR(C)::B(A)+R(C)
    • B(b);CHECK,OGATE,P_SPINB(b),XR(C)::B(A),XB(b)
    • P(h);N_GUARD::QAB1(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • B(b);CHECK,OGATE,P_SPINB(b),XR(C)::B(A),XB(b)
      • K(g);S_FLIGHT,XS(H)::QAR1(B)
      • R(i);OGATE,XS(G)::PXR(i)=Q
      • R(i);SBLOCK,XS(H)::QAR1(B)
      • R(c);S_CUTB(a)::S(H)
      • R(c);N_PINR(C)::B(A)+R(C)
      • B(b);N_PINR(C)::B(A)+R(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).