MESON Chess Problem Database

Problem Display
PID: 223279 (r3n3/Pn1N4/2k1P3/1N1p1B2/5Q2/RR6/2p5/qbB2K2 w - - 0 1)

Slater, George James

English Mechanic and World of Science, 1886

(First published on Fri Dec 31 1886)

r3n3/Pn1N4/2k1P3/1N1p1B2/5Q2/RR6/2p5/qbB2K2

#2

10 + 8

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Ra6#
    • 1...Qc3
      • 2.Ra6#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Qe5
      • 2.Ra6#
    • 1...Qf6
      • 2.Ra6#
    • 1...Qg7
      • 2.Ra6#
    • 1...Qh8
      • 2.Ra6#
    • 1...Qa2
      • 2.Sd4#
    • 1...Qxa3
      • 2.Sd4#
    • 1...Rxa7
      • 2.Sxa7#
    • 1...Rb8
      • 2.axb8S#
    • 1...Ba2
      • 2.Ra6#
    • 1...Sf6
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
    • 1...Sg7
      • 2.Qc7#
    • 1...d4
      • 2.Be4#
      • 2.Qf3#
      • 2.Qe4#
  • Tries
    • 1.Rxa1?
      • threat
        • 2.Sd4#
        • 2.Ra6#
      • 1...Rxa7
        • 2.Sd4#
        • 2.Sxa7#
      • 1...Sa5
        • 2.Sd4#
      • 1...Sc5
        • 2.Sd4#
      • 1...Sd8
        • 2.Sd4#
      • 1...d4
        • 2.Be4#
        • 2.Qf3#
        • 2.Qe4#
      • 1...Ba2
        • 2.Sd4#
      • 1...Sed6
        • 2.Ra6#
      • 1...Sc7
        • 2.Sd4#
        • 2.Qxc7#
      • 1...Sbd6!
    • 1.Qc4+?
      • 1...dxc4
        • 2.Be4#
      • 1...Sc5!
  • Keys
    • 1.Qb8!
      • 1...Qxa3
        • 2.Sd4#
      • 1...Rxa7
        • 2.Sxa7#
      • 1...Rxb8
        • 2.axb8S#
      • 1...d4
        • 2.Be4#
      • 1...Qb2
        • 2.Ra6#
      • 1...Qc3
        • 2.Ra6#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qe5
        • 2.Ra6#
      • 1...Qf6
        • 2.Ra6#
      • 1...Qg7
        • 2.Ra6#
      • 1...Qh8
        • 2.Ra6#
      • 1...Qa2
        • 2.Sd4#
      • 1...Ba2
        • 2.Ra6#
      • 1...Sa5
        • 2.Qb6#
      • 1...Sc5
        • 2.Qb6#
      • 1...Sbd6
        • 2.Qb6#
      • 1...Sd8
        • 2.Qb6#
      • 1...Sed6
        • 2.Qc7#
      • 1...Sf6
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sg7
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD::R(C)
    • Q(a);N_GUARD::S(F),XQ(a)
    • Q(a);N_GUARD::S(F)
    • Q(a);N_GUARD,XR(C)::S(F)
    • R(g);XP(I)::S(F),XR(g)
    • R(g);OGATE::PXR(g)=S
    • B(b);P_PINB(A),S_CUTQ(a)::R(C)
    • S(h);N_GUARD::QAR1(E)
    • S(h);N_GUARD::QAR1(E),XS(h)
  • Tries
    • Try
      • R(C);XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::S(F)
        • B(b);::S(F)
        • S(h);::R(C)
      • Refutation
        • S(f);
    • Try
      • Q(E);CHECK
      • Vars
        • P(d);S_CUTS(f),XQ(E)::B(G)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(E);
    • Vars
      • Q(a);N_GUARD,XR(C)::S(F)
      • R(g);XP(I)::S(F),XR(g)
      • R(g);OGATE,XQ(E)::PXR(g)=S
      • P(d);OGATEB::B(G)
      • Q(a);N_GUARD::R(C)
      • Q(a);N_GUARD::S(F),XQ(a)
      • Q(a);N_GUARD,P_PINB(G)::R(C)
      • Q(a);N_GUARD::S(F)
      • B(b);P_PINB(A),S_CUTQ(a)::R(C)
      • S(f);OGATE::QAR1(E)
      • S(h);N_GUARD::QAR1(E)
      • S(h);N_GUARD::QAR1(E),XS(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).