Problem Display
PID: 221412 (8/8/7Q/4B3/6pb/5p1k/8/7K w - - 0 1)

Akimov, Nikolai Nikolaevich

64 Shakhmatnoe obozrenie, 2020

8/8/7Q/4B3/6pb/5p1k/8/7K

#2

3 + 4


5454 Near Snap 2022

SOLUTION


  • SOUND
  • Sets
    • 1...g3
      • 2.Qe6#
  • Tries
    • 1.Kg1?
      • 1...g3
        • 2.Qe6#
      • 1...f2+!
    • 1.Bh2?
      • 1...g3
        • 2.Qe6#
      • 1...f2!
    • 1.Bf4?
      • 1...g3
        • 2.Qe6#
      • 1...f2!
    • 1.Bd6?
      • 1...g3
        • 2.Qe6#
      • 1...f2!
    • 1.Bc7?
      • 1...g3
        • 2.Qe6#
      • 1...f2!
    • 1.Bb8?
      • 1...g3
        • 2.Qe6#
      • 1...f2!
    • 1.Qh5?
      • 1...g3
        • 2.Qf5#
      • 1...f2!
    • 1.Qh7?
      • 1...g3
        • 2.Qf5#
        • 2.Qd7#
      • 1...f2!
    • 1.Qh8?
      • 1...g3
        • 2.Qc8#
      • 1...f2!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qh2#
      • 1...Bg3
        • 2.Qxg3#
      • 1...g3
        • 2.Qf5#

Anticipated by 231431(1927)

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAB(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);OGATEB::QAB(C)
      • Refutation
        • P(a);CHECK
    • Try
      • B(B);
      • Vars
        • P(c);OGATEB::QAB(C)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Vars
        • P(c);OGATEB::QAB(C)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Vars
        • P(c);OGATEB::QAB(C)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Vars
        • P(c);OGATEB::QAB(C)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Vars
        • P(c);OGATEB::QAB(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);
      • Vars
        • P(c);OGATEB::QAB(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);
      • Refutation
        • P(a);
    • Try
      • Q(C);
      • Vars
        • P(c);OGATEB::QAB(C)
      • Refutation
        • P(a);
  • Actual
    • Q(C);N_PINB(d)
    • Threat
      • QAR1(C)
    • Vars
      • B(d);N_GUARD::QAR1(C),XB(d)
      • P(c);OGATEB::QAB(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).