MESON Chess Problem Database

Problem Display
PID: 9684 (8/4K3/8/6Rb/7k/5n1p/Q6N/8 w - - 0 1)

Moravec, Josef

Casopis ceskoslovenskych sachistu, 1908

8/4K3/8/6Rb/7k/5n1p/Q6N/8

#2

4 + 4

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Sxf3#
    • 1...Bf7
      • 2.Sxf3#
    • 1...Be8
      • 2.Sxf3#
    • 1...Sxg5
      • 2.Qf2#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qg3#
      • 1...Sxg5
        • 2.Qf2#
      • 1...Bg4
        • 2.Qxg4#
      • 1...hxg2!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qxh5#
      • 1...Kxg5
        • 2.Qf6#
      • 1...Bxf7
        • 2.Sxf3#
      • 1...Sxg5
        • 2.Qf2#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Bg6
        • 2.Sxf3#
        • 2.Qf4#

This anticipates 96815(1945)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(d);N_GUARD::S(B),XS(a)
    • S(a);SBLOCK,XR(C)::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);SBLOCK,XR(C)::QAB(A)
        • B(d);N_GUARD::QAR1(A),XB(d)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XB(d)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(A)
      • B(d);N_GUARD,XQ(A)::S(B),XS(a)
      • S(a);OGATE,SBLOCK,XR(C)::QAB(A)
      • B(d);N_GUARD::R1(C),XB(d)
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).