MESON Chess Problem Database

Problem Display
PID: 216195 (4N1n1/5p2/QnR4B/2p2k2/2P2P2/2P4P/4K3/8 w - - 0 1)

Collins, Francis Charles

A Collection of 107 Chess Problems, 1881

4N1n1/5p2/QnR4B/2p2k2/2P2P2/2P4P/4K3/8

#2

9 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sd6#
  • Tries
    • 1.Kd3?
      • threat
        • 2.Sg7#
      • 1...Sxh6
        • 2.Rf6#
      • 1...Sf6
        • 2.Rxf6#
      • 1...f6!
    • 1.Kf3?
      • threat
        • 2.Sg7#
      • 1...Sf6
        • 2.Rxf6#
      • 1...f6!
    • 1.Rf6+?
      • 1...Ke4
        • 2.Sd6#
      • 1...Sxf6!
  • Keys
    • 1.Qb7!
      • 1...Ke4
        • 2.Sd6#
      • 1...Sxc4
        • 2.Qb1#
      • 1...Sxh6
        • 2.Rf6#
      • 1...Sf6
        • 2.Rxf6#
      • 1...f6
        • 2.Qh7#
      • 1...Sa4
        • 2.Qb1#
      • 1...Sd5
        • 2.Qb1#
      • 1...Sd7
        • 2.Qb1#
      • 1...Sa8
        • 2.Qb1#
      • 1...Sc8
        • 2.Qb1#
      • 1...Se7
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(I)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • S(I)
      • Vars
        • S(e);N_GUARD,XB(H)::R1(G)
        • S(e);N_GUARD::R1(G),XS(e)
      • Refutation
        • P(d);
    • Try
      • K(A);S_FLIGHT
      • Threat
        • S(I)
      • Vars
        • S(e);N_GUARD::R1(G),XS(e)
      • Refutation
        • P(d);
    • Try
      • R(G);CHECK
      • Vars
        • K(b);S_FLIGHT::S(I)
      • Refutation
        • S(e);XR(G)
  • Actual
    • Q(F);
    • Vars
      • K(b);S_FLIGHT::S(I)
      • S(c);OGATE,XP(D)::QAB(F)
      • S(e);N_GUARD,XB(H)::R1(G)
      • S(e);N_GUARD::R1(G),XS(e)
      • P(d);OGATE::QAB(F)
      • S(c);OGATE::QAB(F)
      • S(e);N_GUARD::R1(G)
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).