MESON Chess Problem Database

Problem Display
PID: 255672 (4r1B1/8/3pq1p1/3R1bR1/1Pk2n2/P1N2Q2/PB6/2b2N1K w - - 0 1)

van der Hem, M

Probleemblad, 1984

4r1B1/8/3pq1p1/3R1bR1/1Pk2n2/P1N2Q2/PB6/2b2N1K

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb2
      • 2.Sd2#
    • 1...Bd2
      • 2.Sxd2#
  • Tries
    • 1.Rc5+?
      • 1...Kd4
        • 2.Se2#
        • 2.Sb5#
      • 1...dxc5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qb3#
      • 1...Kxd5
        • 2.Sed2#
      • 1...Qxd5
        • 2.Sxd6#
      • 1...Qxe4
        • 2.Rc5#
      • 1...Bxe4
        • 2.Rd4#
      • 1...Sxd5
        • 2.Qe2#
      • 1...Be3
        • 2.Sxe3#
      • 1...Sd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD,XB(D)::S(A)
    • B(a);N_GUARD::S(A),XB(a)
  • Tries
    • Try
      • R(I);CHECK,P_PINQ(f)
      • Refutation
        • P(e);XR(I)
  • Actual
    • S(F);
    • Threat
      • QAB1(G)
    • Vars
      • K(b);P_SPINB(d),P_SPINQ(f),S_CUTB(a),S_FLIGHT,XR(I)::QAB(G)+S(F)
      • Q(f);N_GUARD,P_SPINQ(f),XR(I)::S(F),XP(e)
      • Q(f);P_PINQ(G),XS(F)::B(K)+R(I),DCHECK
      • B(d);P_PINQ(G),XS(F)::R1(I)
      • S(c);N_GUARD,SBLOCK,XR(I)::QAB(G)
      • B(a);N_GUARD::S(A),XB(a)
      • S(c);N_GUARD::QAB1(G),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).