Problem Display
PID: 152419 (6B1/bqrN4/p4Q1R/1kp5/1P6/Kp6/3R4/4N3 w - - 0 1)

Newmann, Edwin H

Good Companions (November First Attempt Ty.), 1915

6B1/bqrN4/p4Q1R/1kp5/1P6/Kp6/3R4/4N3

#2

8 + 7


SOLUTION


  • SOUND
  • Sets
    • 1...Qh1
      • 2.Qxa6#
    • 1...Qg2
      • 2.Qxa6#
    • 1...Qf3
      • 2.Qxa6#
    • 1...Qe4
      • 2.Qxa6#
    • 1...Qd5
      • 2.Qxa6#
    • 1...Qa8
      • 2.Qxa6#
    • 1...Qb8
      • 2.Qxa6#
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qf1#
      • 1...Kc4
        • 2.Rxc5#
      • 1...Qxd5
        • 2.Qxa6#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_GUARD::QAB1(E),XP(d)
  • Actual
    • R(B);P_PINP(c)
    • Threat
      • QAB(E)
    • Vars
      • K(b);N_SPINP(c),S_FLIGHT::B(H)+R(B),DCHECK,XP(c)
      • Q(f);N_GUARD,N_SPINP(c),XR(B)::QAB1(E),XP(d)


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).