Problem Display
PID: 150345 (3rN3/2p5/8/8/2K1k2N/3p2p1/8/BB4Q1 w - - 0 1)

Nesbitt, HA

Hampstead and Highgate Express, 1895

(First published on Sat Dec 7 1895)

3rN3/2p5/8/8/2K1k2N/3p2p1/8/BB4Q1

#2

6 + 5


14867 BCPS Library 2014

SOLUTION


  • SOUND
  • Sets
    • 1...Rd4+
      • 2.Qxd4#
    • 1...Ra8
      • 2.Qd4#
    • 1...Rb8
      • 2.Qd4#
    • 1...Rc8
      • 2.Qd4#
    • 1...Rxe8
      • 2.Qd4#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Qe3#
      • 1...Rxd4+
        • 2.Qxd4#
      • 1...Kf4!
    • 1.Qf2?
      • threat
        • 2.Sf6#
        • 2.Qf3#
      • 1...Rd4+
        • 2.Qxd4#
      • 1...Rxe8
        • 2.Bxd3#
        • 2.Qd4#
        • 2.Qf3#
      • 1...Rd6
        • 2.Qf3#
      • 1...gxf2!
    • 1.Qxg3?
      • threat
        • 2.Sf6#
        • 2.Qe5#
        • 2.Qf3#
      • 1...Rxe8
        • 2.Bxd3#
        • 2.Qf3#
      • 1...Rd5
        • 2.Sf6#
        • 2.Qf3#
      • 1...Rd6
        • 2.Qe5#
        • 2.Qf3#
      • 1...Rd4+!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qe1#
      • 1...Rd4+
        • 2.Qxd4#
      • 1...Kxe5
        • 2.Qe3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(e);CHECK,N_GUARD::QAR1(C),XR(e)
    • R(e);N_GUARD::QAR1(C)
    • R(e);N_GUARD,XS(F)::QAR1(C)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR1(C)
      • Vars
        • R(e);CHECK,OGATE,XB(A)::QAR1(C),XR(e)
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,N_GUARD::QAR1(C),XR(e)
        • R(e);::QAB1(C)
      • Refutation
        • P(b);XQ(C)
    • Try
      • Q(C);XP(b)
      • Threat
        • DUALS(3)
      • Refutation
        • R(e);CHECK
  • Actual
    • B(A);
    • Threat
      • QAR(C)
    • Vars
      • R(e);CHECK,N_GUARD::QAR1(C),XR(e)
      • K(c);N_SPINP(a),P-FLIGHT,XB(A)::QAR2(C)


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).