MESON Chess Problem Database

Problem Display
PID: 18433 (n7/1r2p3/4P1p1/2N1krp1/4NpK1/8/7Q/3R4 w - - 0 1)

Levett, AJ

Time & Tide, 1955

n7/1r2p3/4P1p1/2N1krp1/4NpK1/8/7Q/3R4

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Qxb2#
    • 1...Ra7
      • 2.Qb2#
    • 1...Rc7
      • 2.Qb2#
    • 1...Sb6
      • 2.Qb2#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qd5#
      • 1...Rb3
        • 2.Qd4#
        • 2.Qd5#
      • 1...Rb4
        • 2.Qd5#
      • 1...Sb6
        • 2.Qc3#
        • 2.Qb2#
        • 2.Qd4#
      • 1...Sc7
        • 2.Qc3#
        • 2.Qd4#
      • 1...Rd7!
  • Keys
    • 1.Sf6!
      • 1...Kxf6
        • 2.Qh8#
      • 1...Rxf6
        • 2.Qe2#
      • 1...exf6
        • 2.Qe2#
      • 1...Rb1
        • 2.Sfd7#
      • 1...Rb2
        • 2.Sfd7#
        • 2.Qxb2#
      • 1...Rb3
        • 2.Sfd7#
      • 1...Rb4
        • 2.Sfd7#
      • 1...Rb5
        • 2.Sfd7#
      • 1...Rb6
        • 2.Sfd7#
      • 1...Ra7
        • 2.Qb2#
      • 1...Rc7
        • 2.Qb2#
      • 1...Rd7
        • 2.Sfxd7#
      • 1...Rb8
        • 2.Sfd7#
      • 1...Sb6
        • 2.Qb2#
      • 1...Sc7
        • 2.Sfd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • R(f);N_GUARD::QAB(B),XR(f)
    • R(f);N_GUARD::QAB(B)
    • S(h);S_CUTR(f)::QAB(B)
  • Tries
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • DUALS(3)
      • Vars
        • R(f);::QAR1(B)
      • Refutation
        • R(f);
  • Actual
    • S(C);
    • Vars
      • K(b);N_SPINP(a),OGATEB,S_FLIGHT,XS(C)::QAB(B)
      • R(c);SBLOCK,XS(C)::QAR(B)
      • P(g);SBLOCK,XS(C)::QAR(B)
      • R(f);N_GUARD::S(C)
      • R(f);N_GUARD::QAB(B)
      • R(f);N_GUARD::S(C),XR(f)
      • S(h);S_CUTR(f)::QAB(B)
      • S(h);S_CUTR(f)::S(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).