Problem Display
PID: 231001 (8/3p1PRB/Pp1p4/3kp3/2r1N3/2P5/6K1/5Q2 w - - 0 1)

Slater, George James

Preston Guardian, 1883

(First published on Wed Mar 14 1883)

8/3p1PRB/Pp1p4/3kp3/2r1N3/2P5/6K1/5Q2

#2

8 + 6


15239 Valois Notebooks 2021

SOLUTION


  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qxc4#
  • Tries
    • 1.Sf6+?
      • 1...Kc6
        • 2.Qxc4#
      • 1...Ke6
        • 2.f8S#
      • 1...Kc5!
    • 1.Qd3+?
      • 1...Kc6
        • 2.Qxc4#
      • 1...Ke6
        • 2.Qxd6#
        • 2.f8S#
      • 1...Rd4!
    • 1.f8Q?
      • threat
        • 2.Qxd6#
      • 1...Kc6
        • 2.Qxc4#
      • 1...Ke6
        • 2.Bg8#
        • 2.Qxd6#
        • 2.Q1f7#
        • 2.Q8f7#
        • 2.Qg8#
      • 1...Rc6
        • 2.Q1f7#
        • 2.Q8f7#
        • 2.Qg8#
      • 1...Rxe4!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Rxd6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kc6
        • 2.Qxc4#
      • 1...Rxe4
        • 2.Qb5#
      • 1...Rc6
        • 2.Qd3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(A),XR(a)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A),XR(a)
        • K(b);S_FLIGHT::P=S
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A),XR(a)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • P(F);
      • Threat
        • QAR1(F),XP(e)
      • Vars
        • K(b);S_FLIGHT::QAR2(A),XR(a)
      • Refutation
        • R(a);XS(D)
  • Actual
    • R(G);
    • Threat
      • R1(G),XP(e)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(D)::QAB1(A)
      • K(b);P_SPINP(e),S_FLIGHT::QAR2(A),XR(a)
      • R(a);OGATE,SBLOCK,XS(D)::QAR2(A)
      • R(a);N_GUARD,SBLOCK::QAR2(A)


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).