MESON Chess Problem Database

Problem Display
PID: 245079 (1b6/1K6/1Rpp1N2/BPk5/2r5/1P1b1NQ1/3R1PB1/8 w - - 0 1)

Erokhin, Vladimir Alekseevich

Scacchi e Scienze Applicate, 1987

1b6/1K6/1Rpp1N2/BPk5/2r5/1P1b1NQ1/3R1PB1/8

#2

11 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Sd7#
    • 1...Bf1
      • 2.Sd7#
    • 1...Bc2
      • 2.Sd7#
    • 1...Be2
      • 2.Sd7#
    • 1...Be4
      • 2.Sd7#
    • 1...Bg6
      • 2.Sd7#
    • 1...Bh7
      • 2.Sd7#
    • 1...cxb5
      • 2.Rc6#
    • 1...d5
      • 2.Sd7#
  • Tries
    • 1.Ka6?
      • threat
        • 2.Rxc6#
      • 1...Be4
        • 2.Sd7#
      • 1...cxb5!
    • 1.Qe5+?
      • 1...d5
        • 2.Sd7#
      • 1...dxe5!
    • 1.Qg5+?
      • 1...Bf5
        • 2.Sd7#
      • 1...d5!
    • 1.Qg8?
      • threat
        • 2.Sd7#
      • 1...Bf5
        • 2.Qxc4#
      • 1...d5!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Se6#
      • 1...Kxd4
        • 2.Qe3#
      • 1...Rxd4
        • 2.Sd7#
      • 1...Bf5
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • B(a);::S(J)
    • P(d);SBLOCK,XP(H)::R1(I)
    • P(e);SBLOCK::S(J)
  • Tries
    • Try
      • K(K);S_FLIGHT
      • Threat
        • R1(I),XP(d)
      • Vars
        • B(a);::S(J)
      • Refutation
        • P(d);XP(H)
    • Try
      • Q(F);CHECK
      • Vars
        • P(e);P_SPINP(e)::S(J)
      • Refutation
        • P(e);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • B(a);P_SPINB(a)::S(J)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • Q(F);
      • Threat
        • S(J)
      • Vars
        • B(a);N_GUARD::QAR1(F),XR(b)
      • Refutation
        • P(e);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(c);OGATEB,P_SPINB(a),S_FLIGHT,XS(E)::QAB1(F)
      • R(b);SBLOCK,XS(E)::S(J)
      • B(a);::R1(I),XP(d)
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).