MESON Chess Problem Database

Problem Display
PID: 208183 (Q7/4p3/4PN1p/4k2P/1P1N2K1/4p3/2P1B3/8 w - - 0 1)

Anonymous

New York Clipper, 1875

Q7/4p3/4PN1p/4k2P/1P1N2K1/4p3/2P1B3/8

#2

9 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa1#
    • 1...Kd6
      • 2.Qb8#
    • 1...Kxf6
      • 2.Qh8#
  • Tries
    • 1.Kh4?
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kf4
        • 2.Qe4#
        • 2.Qb8#
      • 1...Kd6
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6!
    • 1.Sd7+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxd4!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Sb5#
        • 2.Se8#
        • 2.Qf4#
      • 1...Kxf6!
    • 1.Qc6?
      • 1...Kxd4
        • 2.Qc5#
      • 1...exf6
        • 2.Sf3#
      • 1...Kxf6!
    • 1.Qa5+?
      • 1...Kxd4
        • 2.Qa1#
        • 2.Qc5#
      • 1...Kd6
        • 2.Se4#
        • 2.Se8#
        • 2.Qc5#
      • 1...Kxf6!
    • 1.Qb8+?
      • 1...Kxf6
        • 2.Qh8#
      • 1...Kxd4!
    • 1.Qc8?
      • 1...Kxd4
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6!
    • 1.Qd8?
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6!
    • 1.c3?
      • 1...Kd6
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6!
  • Keys
    • 1.c4!
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kd6
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(I)
    • K(b);S_FLIGHT::QAB(I)
    • K(b);OGATEB,S_FLIGHT,XS(H)::QAB(I)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(I)
        • K(b);S_FLIGHT::QAB(I)
        • K(b);OGATEB,S_FLIGHT,XS(H)::QAB(I)
      • Refutation
        • P(d);XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(I)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(b);S_FLIGHT,XS(H)
    • Try
      • Q(I);
      • Vars
        • K(b);S_FLIGHT,XS(D)::QAB1(I)
        • P(d);SBLOCK,XS(H)::S(D)
      • Refutation
        • K(b);S_FLIGHT,XS(H)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(b);S_FLIGHT,XS(H)
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(H)::QAB(I)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • Q(I);
      • Vars
        • K(b);S_FLIGHT,XS(D)::QAB1(I)
        • K(b);OGATEB,S_FLIGHT,XS(H)::QAB(I)
      • Refutation
        • P(d);XS(H)
    • Try
      • Q(I);
      • Vars
        • K(b);OGATEB,P_SPINP(d),S_FLIGHT,XS(H)::QAB(I)
      • Refutation
        • P(d);XS(H)
    • Try
      • P(A);
      • Vars
        • K(b);S_FLIGHT::QAB(I)
        • K(b);OGATEB,S_FLIGHT,XS(H)::QAB(I)
      • Refutation
        • P(d);XS(H)
  • Actual
    • P(A);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(I)
      • K(b);S_FLIGHT::QAB(I)
      • K(b);OGATEB,S_FLIGHT,XS(H)::QAB(I)
      • P(d);SBLOCK,XS(H)::QAR1(I)
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).