Problem Display
PID: 260836 (3B4/2RP4/pPQ1n3/kP6/8/K7/8/8 w - - 0 1)

Dyachuk, Vasyl Vasilovich

2nd Prize, Gravyura, 2020

3B4/2RP4/pPQ1n3/kP6/8/K7/8/8

#2

7 + 3


6490 yacpdb 2022

SOLUTION


  • SOUND
  • Sets
    • 1...axb5
      • 2.Ra7#
  • Tries
    • 1.Bf6?
      • threat
        • 2.Bc3#
      • 1...axb5
        • 2.Ra7#
      • 1...Sd4!
    • 1.Be7?
      • threat
        • 2.Bb4#
      • 1...axb5
        • 2.Ra7#
      • 1...Sc5!
    • 1.Ra7?
      • threat
        • 2.Rxa6#
      • 1...Sc5
        • 2.b7#
      • 1...Sc7!
    • 1.Qc3+?
      • 1...Kxb5
        • 2.Qb4#
      • 1...Kxb6!
    • 1.Qxe6?
      • 1...axb5
        • 2.Ra7#
      • 1...Kxb5!
    • 1.b7?
      • threat
        • 2.Qxa6#
      • 1...Sc5
        • 2.Rc8#
      • 1...axb5!
  • Keys
    • 1.Bh4!
      • threat
        • 2.Be1#
      • 1...axb5
        • 2.Ra7#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,XP(B)::R(E)
  • Tries
    • Try
      • B(G);
      • Threat
        • B(G)
      • Vars
        • P(b);OGATEB,XP(B)::R(E)
      • Refutation
        • S(c);
    • Try
      • B(G);
      • Threat
        • B(G)
      • Vars
        • P(b);OGATEB,XP(B)::R(E)
      • Refutation
        • S(c);
    • Try
      • R(E);P_PINP(b)
      • Threat
        • R1(E),XP(b)
      • Vars
        • S(c);N_GUARD::B(G)+P(C)
      • Refutation
        • S(c);
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT,XP(B)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
    • Try
      • Q(D);XS(c)
      • Vars
        • P(b);OGATEB,SBLOCK,XP(B)::R(E)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • P(C);
      • Threat
        • QAR1(D),XP(b)
      • Vars
        • S(c);N_GUARD::B(G)+R(E)
      • Refutation
        • P(b);XP(B)
  • Actual
    • B(G);
    • Threat
      • B(G)
    • Vars
      • P(b);OGATEB,XP(B)::R(E)


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).