MESON Chess Problem Database

Problem Display
PID: 215925 (8/4rn2/R1R5/P2k1p1K/r2N1P2/1PpPBN2/1q4B1/8 w - - 0 1)

van der Scheur, D

Probleemblad, 1980

8/4rn2/R1R5/P2k1p1K/r2N1P2/1PpPBN2/1q4B1/8

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Se5#
    • 1...Qc1
      • 2.Se5#
    • 1...Qa3
      • 2.Se5#
    • 1...Qb1
      • 2.Se5#
    • 1...Qxb3
      • 2.Se5#
    • 1...Rc4
      • 2.bxc4#
    • 1...Rxa5
      • 2.Rxa5#
    • 1...Ra7
      • 2.Sd2#
    • 1...Rb7
      • 2.Sd2#
    • 1...Rc7
      • 2.Sd2#
    • 1...Rd7
      • 2.Sd2#
    • 1...c2
      • 2.Se5#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Rc5#
      • 1...Rxe3
        • 2.Sc7#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Qa3
        • 2.Sxc3#
      • 1...Rc4
        • 2.bxc4#
      • 1...Rc7
        • 2.Sxc7#
      • 1...Rd4!
    • 1.b4?
      • threat
        • 2.Rc5#
      • 1...Qxb4
        • 2.Se5#
      • 1...Rxa5
        • 2.Rxa5#
      • 1...Rc7
        • 2.Sd2#
      • 1...Rxb4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Rc5#
      • 1...Rxa5
        • 2.Sd2#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Qa3
        • 2.Sfd4#
      • 1...Rc4
        • 2.bxc4#
      • 1...Rc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::B(A)+S(E)
    • Q(a);N_GUARD,XP(B)::B(A)+S(E)
    • R(c);OGATE::P(B),XR(c)
    • R(c);OGATE,XP(H)::R(J),XR(c)
    • R(f);N_GUARD::B(A)+S(E)
    • P(b);S_CUTQ(a)::B(A)+S(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(K)
      • Vars
        • R(f);N_GUARD,XB(D)::S(F)
        • S(g);N_GUARD::R1(K),XS(g)
        • Q(a);N_GUARD::S(F),XP(b)
        • R(c);OGATE::P(B),XR(c)
        • R(f);N_GUARD::S(F),XR(f)
      • Refutation
        • R(c);
    • Try
      • P(B);
      • Threat
        • R1(K)
      • Vars
        • Q(a);N_GUARD,XP(B)::B(A)+S(E)
        • R(c);OGATE,XP(H)::R(J),XR(c)
        • R(f);N_GUARD::B(A)+S(E)
      • Refutation
        • R(c);XP(B)
  • Actual
    • S(F);
    • Threat
      • R1(K)
    • Vars
      • R(c);N_GUARD,XP(H)::B(A)+S(E)
      • S(g);N_GUARD::R1(K),XS(g)
      • Q(a);N_GUARD::B(A)+S(E)
      • R(c);OGATE::P(B),XR(c)
      • R(f);N_GUARD::S(F),XR(f)
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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).