MESON Chess Problem Database

Problem Display
PID: 117034 (8/2RB1b2/3p4/2Pkp3/R2p2pQ/4Pp2/3K4/3N4 w - - 0 1)

Kopnin, Aleksey Grigorevich

Uralski Skazi, 1990

8/2RB1b2/3p4/2Pkp3/R2p2pQ/4Pp2/3K4/3N4

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sc3#
    • 1...dxe3+
      • 2.Sxe3#
    • 1...d3
      • 2.Sc3#
      • 2.e4#
    • 1...g3
      • 2.e4#
    • 1...e4
      • 2.Qg5#
  • Tries
    • 1.Bf5?
      • threat
        • 2.e4#
      • 1...dxe3+
        • 2.Sxe3#
      • 1...dxc5
        • 2.Qd8#
      • 1...e4!
    • 1.Qg5?
      • threat
        • 2.Rxd4#
      • 1...dxe3+
        • 2.Sxe3#
      • 1...Ke4
        • 2.Sc3#
      • 1...d3
        • 2.Sc3#
        • 2.Rd4#
        • 2.e4#
      • 1...dxc5!
    • 1.Qxg4?
      • threat
        • 2.e4#
      • 1...dxe3+
        • 2.Sxe3#
      • 1...e4
        • 2.Qf5#
        • 2.Qg5#
      • 1...Bg6
        • 2.Be6#
      • 1...dxc5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qa8#
      • 1...dxe3+
        • 2.Sxe3#
      • 1...Ke4
        • 2.Sc3#
      • 1...dxc5
        • 2.Bf5#
      • 1...e4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINP(b),S_FLIGHT::S(A)
    • P(b);CHECK,XP(C)::S(A),XP(b)
    • P(c);::P(C)
    • P(e);OGATEB,SBLOCK::QAR(E)
  • Tries
    • Try
      • B(H);
      • Threat
        • P(C)
      • Vars
        • P(b);CHECK,XP(C)::S(A),XP(b)
        • P(f);OGATEB,XP(F)::QAR(E)
      • Refutation
        • P(e);
    • Try
      • Q(E);P_PINP(e)
      • Threat
        • R1(D),XP(b)
      • Vars
        • P(b);CHECK,XP(C)::S(A),XP(b)
        • K(d);N_SPINP(e),P_SPINP(b),S_FLIGHT::S(A)
      • Refutation
        • P(f);XP(F)
    • Try
      • Q(E);XP(c)
      • Threat
        • P(C)
      • Vars
        • P(b);CHECK,XP(C)::S(A),XP(b)
        • B(g);N_GUARD::B(H)
      • Refutation
        • P(f);XP(F)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • P(b);CHECK,XP(C)::S(A),XP(b)
      • K(d);P_SPINP(b),S_FLIGHT::S(A)
      • P(f);OGATEB,XP(F)::QAR(E)+B(H)
      • P(e);OGATEB,SBLOCK::QAR(E)
HTML5 logo

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).