MESON Chess Problem Database

Problem Display
PID: 202439 (3r1N1n/p1p1Qpp1/rp5p/PP1k4/3PN1n1/6Kb/6P1/b2R1B2 w - - 0 1)

van Dijk, Johannes

Falkirk Herald, 1923

3r1N1n/p1p1Qpp1/rp5p/PP1k4/3PN1n1/6Kb/6P1/b2R1B2

#2

10 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bxd4
      • 2.Sc3#
    • 1...Sf2
      • 2.Qe5#
    • 1...Sh2
      • 2.Qe5#
    • 1...Se3
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sf6
      • 2.Qe5#
    • 1...c5
      • 2.Qb7#
    • 1...f5
      • 2.Qe6#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qxd8#
      • 1...Rxf8
        • 2.Qd7#
      • 1...Sxf2
        • 2.Qe5#
      • 1...bxa5
        • 2.Qc5#
      • 1...Rd6
        • 2.Qe4#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Ra8
        • 2.Qd7#
      • 1...Rb8
        • 2.Qd7#
      • 1...Rc8
        • 2.Qd7#
      • 1...Re8
        • 2.Qd7#
      • 1...Sh2
        • 2.Qe5#
      • 1...Se3
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf6
        • 2.Qe5#
      • 1...Bxd4!
    • 1.Sf6+?
      • 1...Sxf6
        • 2.Qe5#
      • 1...gxf6!
    • 1.Qxf7+?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Sxf7!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qxd8#
      • 1...Kxd4
        • 2.Sb1#
      • 1...Rxf8
        • 2.Qd7#
      • 1...Bxd4
        • 2.Bc4#
      • 1...bxa5
        • 2.Qc5#
      • 1...Rd6
        • 2.Qe4#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Ra8
        • 2.Qd7#
      • 1...Rb8
        • 2.Qd7#
      • 1...Rc8
        • 2.Qd7#
      • 1...Re8
        • 2.Qd7#
      • 1...Sf2
        • 2.Qe5#
      • 1...Sh2
        • 2.Qe5#
      • 1...Se3
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::S(F),XB(a)
    • B(a);N_GUARD,P_SPINB(a),XP(E)::S(F)
    • S(c);N_GUARD::QAR1(I)
    • S(c);N_GUARD::QAR1(I),XS(c)
    • P(i);OGATE::QAB(I)
    • P(j);N_GUARD::QAB1(I)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR(I),XR(l)
      • Vars
        • R(l);N_GUARD,XS(J)::QAR2(I)
        • S(c);N_GUARD,XS(F)::QAR1(I)
        • P(f);N_GUARD,XP(G)::QAR1(I)
        • R(l);SBLOCK::QAB1(I)
        • R(l);N_GUARD::QAR2(I),XR(l)
        • R(l);N_GUARD::QAR2(I)
        • S(c);N_GUARD::QAR1(I)
        • S(c);N_GUARD::QAR1(I),XS(c)
      • Refutation
        • B(a);P_SPINB(a),XP(E)
    • Try
      • S(F);CHECK
      • Vars
        • S(c);XS(F)::QAR1(I)
      • Refutation
        • P(k);XS(F)
    • Try
      • Q(I);CHECK,XP(j)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(I)
      • Refutation
        • S(m);XQ(I)
  • Actual
    • S(F);
    • Threat
      • QAR(I),XR(l)
    • Vars
      • K(d);P-FLIGHT,XP(E)::R(A)+S(F)
      • R(l);N_GUARD,XS(J)::QAR2(I)
      • B(a);SBLOCK,XP(E)::B(B)
      • P(f);N_GUARD,XP(G)::QAR1(I)
      • R(l);SBLOCK::QAB1(I)
      • R(l);N_GUARD::QAR2(I),XR(l)
      • R(l);N_GUARD::QAR2(I)
      • S(c);N_GUARD::QAR1(I)
      • S(c);N_GUARD::QAR1(I),XS(c)
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).