MESON Chess Problem Database

Problem Display
PID: 263857 (3Q3K/3PRp2/2rk4/1p6/1PpNrP2/8/8/8 w - - 0 1)

Ferber, Eugene

Tijdschrift vd NSB, 1908

3Q3K/3PRp2/2rk4/1p6/1PpNrP2/8/8/8

#2

7 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.dxc8Q#
      • 2.dxc8S#
      • 2.dxc8B#
      • 2.dxc8R#
  • Tries
    • 1.Qb6?
      • threat
        • 2.d8Q#
      • 1...Kxe7
        • 2.d8Q#
      • 1...Rxe7
        • 2.Qxc6#
      • 1...Kd5!
    • 1.Qb8+?
      • 1...Kxe7
        • 2.d8Q#
      • 1...Rc7
        • 2.d8Q#
      • 1...Kd5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.d8Q#
      • 1...Rc8+
        • 2.dxc8S#
      • 1...Kd5
        • 2.d8Q#
        • 2.d8R#
      • 1...Kc7
        • 2.d8Q#
      • 1...Kxe7
        • 2.d8Q#
      • 1...Rxe7
        • 2.Qxc6#
      • 1...Rc7
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);P_PINR(d)
      • Threat
        • P=Q
      • Vars
        • K(e);N_SPINR(d),S_FLIGHT,XR(E)::P=Q
        • R(b);SBLOCK,XR(E)::QAR1(F),XR(d)
      • Refutation
        • K(e);N_SPINR(d),P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);S_FLIGHT,XR(E)::P=Q
        • R(d);P_SPINR(d)::P=Q
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • P=Q
    • Vars
      • R(d);CHECK,OGATE::PXR(d)=S
      • K(e);P-FLIGHT,P_SPINR(d)::P=Q
      • K(e);S_FLIGHT::P=Q
      • K(e);S_FLIGHT,XR(E)::P=Q
      • R(b);SBLOCK,XR(E)::QAR1(F),XR(d)
      • R(d);SBLOCK::S(B)
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).