MESON Chess Problem Database

Problem Display
PID: 189423 (R3nk2/1Q6/6b1/2R5/8/8/8/4K3 w - - 0 1)

Mach, Julius Zdenek

Wiener Schachzeitung, 1911

R3nk2/1Q6/6b1/2R5/8/8/8/4K3

#2

4 + 3

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Rxe8+?
      • 1...Kxe8
        • 2.Rc8#
      • 1...Bxe8!
  • Keys
    • 1.Rg5!
      • 1...Kg8
        • 2.Rxe8#
      • 1...Bb1
        • 2.Qg7#
      • 1...Bc2
        • 2.Qg7#
      • 1...Bd3
        • 2.Qg7#
      • 1...Be4
        • 2.Qg7#
      • 1...Bf5
        • 2.Qg7#
      • 1...Bh5
        • 2.Qg7#
      • 1...Bf7
        • 2.Qb4#
      • 1...Bh7
        • 2.Qg7#

This anticipates 124424(0000), 47406(1919), 76437(1930), 78015(1955), 29033(1991)

This is a version of 9808

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK,XS(b)
      • Vars
        • K(c);P-FLIGHT,XR(D)::R(B)
      • Refutation
        • B(a);XR(D)
  • Actual
    • R(B);
    • Vars
      • K(c);P-FLIGHT,P_SPINB(a)::R(D),XS(b)
      • B(a);::QAB1(C)
      • B(a);SBLOCK::QAB(C)
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).