MESON Chess Problem Database

Problem Display
PID: 21608 (6KB/8/3P1r2/2p1k2p/2Q4N/5p2/5P2/3R4 w - - 0 1)

Grimshaw, Percy

Chess Amateur (The), 1920

6KB/8/3P1r2/2p1k2p/2Q4N/5p2/5P2/3R4

#2

7 + 5

3360 Simple Two-move Themes 1924
5501 Chess Cameos 1936
1085 Australian Chess Problem Magazine 1996
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qe3#
      • 1...Ke4
        • 2.Qe3#
      • 1...Kf4!
    • 1.Qc1?
      • threat
        • 2.Qe3#
      • 1...Ke4
        • 2.Qe3#
      • 1...Ke6!
    • 1.Qa4?
      • 1...Ke6
        • 2.Qe8#
      • 1...c4!
    • 1.Qxc5+?
      • 1...Ke4
        • 2.Rd4#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Kf4
        • 2.Rd4#
      • 1...Ke6!
  • Keys
    • 1.Kg7!
      • 1...Rg6+
        • 2.Kxg6#
      • 1...Rf7+
        • 2.Kxf7#
      • 1...Rxd6
        • 2.Re1#
      • 1...Rf4
        • 2.Qd5#
      • 1...Rf5
        • 2.Sg6#
      • 1...Re6
        • 2.Rd5#
      • 1...Rh6
        • 2.Kxh6#
      • 1...Rf8
        • 2.Kxf8#

This anticipates 16386(1940), 51372(1958)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • K(c);N_SPINR(e),P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);N_SPINR(e),S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • K(c);N_SPINR(e),P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);N_SPINR(e),P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(c);N_SPINR(e),P-FLIGHT::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK,XP(b)
      • Vars
        • K(c);N_SPINR(e),S_FLIGHT::R(A)
      • Refutation
        • K(c);N_SPINR(e),P-FLIGHT
  • Actual
    • K(F);N_PINR(e),P-FLIGHT
    • Vars
      • R(e);CHECK::B(G)+K(F),XR(e)
      • R(e);SBLOCK,XP(E)::R(A)
      • R(e);SBLOCK::QAR1(C)
      • R(e);N_GUARD,SBLOCK::S(D)
      • R(e);SBLOCK::R1(A)
      • R(e);::B(G)+K(F),XR(e)
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).