MESON Chess Problem Database

Problem Display
PID: 114922 (8/1Q5K/6B1/2b4N/3k2rR/N7/1n1P4/8 w - - 0 1)

Barth, Gustav A

Checkmate, 1903

8/1Q5K/6B1/2b4N/3k2rR/N7/1n1P4/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxe4#
  • Tries
    • 1.Bf7?
      • threat
        • 2.Qd5#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kd3!
    • 1.Qd7+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...Ke5!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qd5#
      • 1...Rg7+
        • 2.Qxg7#
      • 1...Ke5
        • 2.Qd5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Rg5
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAR1(F),XR(c)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR1(F)
      • Vars
        • K(b);N_SPINR(c),S_FLIGHT::QAR1(F)
      • Refutation
        • K(b);N_SPINR(c),P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAR2(F),XB(d)
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT
  • Actual
    • B(E);N_PINR(c)
    • Threat
      • QAR1(F)
    • Vars
      • R(c);CHECK,N_GUARD::QAB(F),XR(c)
      • K(b);S_FLIGHT::QAR1(F)
      • R(c);OGATE,P_SPINR(c),XB(E)::QAR1(F),XR(c)
      • R(c);::QAB(F),XS(a)
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).