MESON Chess Problem Database

Problem Display
PID: 18858 (8/3Qp3/3p3K/2p1p2p/2n1n3/1N1k1N2/1PR1RP2/r2b3q w - - 0 1)

van Dijk, Nils Gustav Gerard

3rd Prize, Tidskrift for Schack, 1958

8/3Qp3/3p3K/2p1p2p/2n1n3/1N1k1N2/1PR1RP2/r2b3q

#2

8 + 11

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Se1#
    • 1...Qe1
      • 2.Sxe1#
    • 1...Qh2
      • 2.Se1#
    • 1...Qh3
      • 2.Se1#
    • 1...Qh4
      • 2.Se1#
    • 1...Rc1
      • 2.Sxc1#
    • 1...Ra2
      • 2.Sc1#
    • 1...Ra3
      • 2.Sc1#
    • 1...Ra4
      • 2.Sc1#
    • 1...Ra5
      • 2.Sc1#
    • 1...Ra6
      • 2.Sc1#
    • 1...Ra7
      • 2.Sc1#
    • 1...Ra8
      • 2.Sc1#
    • 1...Sxb2
      • 2.Sxe5#
    • 1...Sa3
      • 2.Sxe5#
    • 1...Se3
      • 2.Sxe5#
    • 1...Sa5
      • 2.Sxe5#
    • 1...Sb6
      • 2.Sxe5#
    • 1...Sxf2
      • 2.Sxc5#
    • 1...Sc3
      • 2.Sxc5#
    • 1...Sg3
      • 2.Sxc5#
    • 1...Sg5
      • 2.Sxc5#
    • 1...Sf6
      • 2.Sxc5#
    • 1...d5
      • 2.Qxd5#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qxe4#
      • 1...Bxe2
        • 2.Rc3#
      • 1...Sd2
        • 2.Rexd2#
      • 1...Qh4
        • 2.Se1#
      • 1...Se3
        • 2.Red2#
      • 1...d5
        • 2.Sxc5#
      • 1...Qxf3!
    • 1.Qxd6+?
      • 1...Scxd6
        • 2.Sxe5#
      • 1...Sexd6
        • 2.Sxc5#
      • 1...exd6!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxc4#
      • 1...Bxc2
        • 2.Re3#
      • 1...Sd2
        • 2.Rcxd2#
      • 1...Ra4
        • 2.Sc1#
      • 1...Sc3
        • 2.Rcd2#
      • 1...d5
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 21
  • Sets
    • Q(c);N_GUARD::S(F)
    • Q(c);N_GUARD::S(F),XQ(c)
    • R(a);N_GUARD::S(E),XR(a)
    • R(a);N_GUARD::S(E)
    • S(e);N_GUARD,XP(A)::S(F),XP(h)
    • S(e);N_GUARD::S(F),XP(h)
    • S(f);N_GUARD,XP(D)::S(E),XP(g)
    • S(f);N_GUARD::S(E),XP(g)
    • P(j);OGATE::QAR2(H),XP(j)
  • Tries
    • Try
      • Q(H);N_PINP(j),P_PINS(f)
      • Threat
        • QAB1(H),XS(f)
      • Vars
        • B(b);SBLOCK,XR(C)::R1(B)
        • S(e);N_GUARD::R1(C),XS(e)
        • Q(c);N_GUARD::S(F)
        • S(e);N_GUARD::R1(C)
        • P(j);N_GUARD::S(E),XP(g)
      • Refutation
        • Q(c);XS(F)
    • Try
      • Q(H);CHECK,XP(j)
      • Vars
        • S(e);XQ(H)::S(F),XP(h)
        • S(f);XQ(H)::S(E),XP(g)
      • Refutation
        • P(k);XQ(H)
  • Actual
    • Q(H);N_PINP(j),P_PINS(e)
    • Threat
      • QAB1(H),XS(e)
    • Vars
      • B(b);SBLOCK,XR(B)::R1(C)
      • S(f);N_GUARD::R1(B),XS(f)
      • R(a);N_GUARD::S(E)
      • S(f);N_GUARD::R1(B)
      • P(j);N_GUARD::S(F),XP(h)
HTML5 logo

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).