MESON Chess Problem Database

Problem Display
PID: 204428 (1q4Q1/2Rp1N2/3N4/2pk1B2/1p6/4P3/3P3K/5b2 w - - 0 1)

Kofman, Rafael Moiseevich

Revista de Sah, 1925

1q4Q1/2Rp1N2/3N4/2pk1B2/1p6/4P3/3P3K/5b2

#2

8 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa8
      • 2.Qxa8#
    • 1...Bg2
      • 2.Qxg2#
    • 1...Bc4
      • 2.Qg2#
    • 1...Bb5
      • 2.Qg2#
    • 1...Ba6
      • 2.Qg2#
  • Tries
    • 1.Qe8?
      • threat
        • 2.Be4#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Qxc7
        • 2.Be4#
        • 2.Qe4#
      • 1...Bg2
        • 2.Qe5#
      • 1...Bd3
        • 2.Qe5#
      • 1...Qxe8!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sd8#
      • 1...Qxc7+
        • 2.Sfe5#
      • 1...Kxc4
        • 2.Sd6#
      • 1...Qxg8
        • 2.Sb6#
      • 1...Bxc4
        • 2.Qg2#
      • 1...Qb6
        • 2.Sxb6#
        • 2.Sfd6#
      • 1...Qd8
        • 2.Sb6#
        • 2.Sxd8#
      • 1...Qe8
        • 2.Sb6#
      • 1...Qf8
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(f);OGATE::QAB(H),XQ(f)
    • B(a);N_GUARD::QAB(H),XB(a)
    • B(a);N_GUARD::QAB(H)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);::QAR1(H)
      • Refutation
        • Q(f);XQ(H)
  • Actual
    • S(E);P_SPINR(F)
    • Threat
      • QAB(H)+S(G)
    • Vars
      • Q(f);CHECK,N_GUARD,XR(F)::QAB(H)+S(G)
      • K(d);P_SPINP(c),S_FLIGHT,XS(E)::QAB(H)+S(G),DCHECK
      • Q(f);N_GUARD,N_PINR(F),XQ(H)::S(E)
      • B(a);N_GUARD,SBLOCK,XS(E)::QAB(H)
      • Q(f);N_GUARD,N_PINR(F)::S(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).