Problem Display
PID: 262729 (3B4/8/2pkp3/1pNP3R/1K6/1p2pN2/3P4/3Q4 w - - 0 1)

Kapustin, Fedor Mikhailovich

4th Comm., SuperProblem, 2018

3B4/8/2pkp3/1pNP3R/1K6/1p2pN2/3P4/3Q4

#2

8 + 6


6490 yacpdb 2022

SOLUTION


  • SOUND
  • Sets
    • 1...exd5
      • 2.Rh6#
  • Tries
    • 1.Rh7?
      • threat
        • 2.Rd7#
      • 1...Kxd5
        • 2.Rd7#
        • 2.dxe3#
      • 1...cxd5!
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...cxd5
        • 2.Qa6#
      • 1...e5
        • 2.Qxe5#
      • 1...b2!
    • 1.dxe3?
      • threat
        • 2.dxe6#
      • 1...exd5
        • 2.Rh6#
      • 1...e5
        • 2.Rh6#
      • 1...cxd5!
    • 1.dxe6?
      • threat
        • 2.dxe3#
      • 1...exd2
        • 2.Qxd2#
      • 1...e2!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sf7#
      • 1...Kxd5
        • 2.dxe3#
      • 1...cxd5
        • 2.Sb7#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATEB,SBLOCK,XP(F)::R(G)
  • Tries
    • Try
      • R(G);
      • Threat
        • R1(G)
      • Refutation
        • P(d);XP(F)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);OGATEB,XP(F)::QAR(A)
        • P(f);::QAB1(A),XP(f)
      • Refutation
        • P(a);
    • Try
      • P(B);XP(b)
      • Threat
        • QAR(A)+P(F),XP(f)
      • Vars
        • P(f);OGATEB,P_SPINP(f),XP(F)::R(G)
        • P(f);OGATEB::R(G)
      • Refutation
        • P(d);P_SPINP(d),XP(F)
    • Try
      • P(F);XP(f)
      • Threat
        • QAR(A)+P(B),XP(b)
      • Vars
        • P(b);OGATE,P_SPINP(b),XP(B)::QAR(A),XP(b)
      • Refutation
        • P(b);
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(e);P-FLIGHT,XP(F)::QAR(A)+P(B),XP(b)
      • P(d);SBLOCK,XP(F)::S(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).