MESON Chess Problem Database

Problem Display
PID: 224555 (6B1/B7/3pppN1/8/N3k3/8/nQ4K1/8 w - - 0 1)

Boatrite, AV

Nashville Daily American, 1888

6B1/B7/3pppN1/8/N3k3/8/nQ4K1/8

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qb1#
      • 2.Qc2#
    • 1...e5
      • 2.Qb1#
      • 2.Qc2#
    • 1...f5
      • 2.Qd4#
  • Tries
    • 1.Bxe6?
      • threat
        • 2.Qd4#
        • 2.Qb1#
        • 2.Qc2#
        • 2.Qe2#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sc3
        • 2.Qc2#
      • 1...Sb4
        • 2.Qd4#
        • 2.Qe2#
      • 1...Kd3!
    • 1.Qe2+?
      • 1...Kd5
        • 2.Se7#
      • 1...Kf5!
  • Keys
    • 1.Qb5!
      • 1...d5
        • 2.Qb1#
      • 1...e5
        • 2.Qb1#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sb4
        • 2.Sc3#
      • 1...f5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(e);SBLOCK::QAR1(A)
  • Tries
    • Try
      • B(F);XP(d)
      • Threat
        • DUALS(4)
      • Vars
        • S(a);::QAR1(A)
        • S(a);::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINP(d),S_FLIGHT::S(D)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • P(c);SBLOCK::QAB(A)
      • P(d);::QAB(A)
      • S(a);N_GUARD::S(C)
      • S(a);N_GUARD::S(C),XS(a)
      • P(e);SBLOCK::QAR2(A)
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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).