MESON Chess Problem Database

Problem Display
PID: 259756 (3K1RB1/3R4/8/3pk3/3r4/6N1/1Q6/1q1r3b w - - 0 1)

Kabakov, A

Pravda Vostoka, 1951

(First published on Sat Oct 13 1951)

3K1RB1/3R4/8/3pk3/3r4/6N1/1Q6/1q1r3b

#2

6 + 6

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Rf5#
      • 2.Qb8#
    • 1...Qd3
      • 2.Qb8#
    • 1...Qe4
      • 2.Qb8#
    • 1...Qf5
      • 2.Rxf5#
      • 2.Qb8#
    • 1...Qh7
      • 2.Qb8#
    • 1...Qa1
      • 2.Rf5#
      • 2.Qb8#
    • 1...Qc1
      • 2.Rf5#
    • 1...Qxb2
      • 2.Rf5#
    • 1...Rd3
      • 2.Rf5#
  • Tries
    • 1.Rf3?
      • threat
        • 2.Rxd5#
      • 1...Qxb2
        • 2.Rf5#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Qa2
        • 2.Rf5#
        • 2.Qb8#
      • 1...Qe4
        • 2.Qb8#
      • 1...Bxf3!
    • 1.Qe2+?
      • 1...Qe4
        • 2.Rf5#
      • 1...Be4
        • 2.Rf5#
      • 1...Re4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Re7#
      • 1...Kxe4
        • 2.Qe2#
      • 1...Qxe4
        • 2.Qb8#
      • 1...Bxe4
        • 2.Qh2#
      • 1...dxe4
        • 2.Rd5#
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::QAB(A)
    • Q(a);N_GUARD::R1(E)
    • Q(a);N_GUARD,N_SPINR(d),XQ(A)::R1(E)
    • R(b);S_CUTQ(a)::R1(E)
  • Tries
    • Try
      • R(E);
      • Threat
        • R1(C),XP(e)
      • Vars
        • Q(a);N_GUARD,N_SPINR(d),XQ(A)::R1(E)
        • Q(a);N_GUARD::R1(E),XQ(a)
        • Q(a);N_GUARD::QAB(A)
      • Refutation
        • B(c);XR(E)
    • Try
      • Q(A);CHECK,N_PINR(d)
      • Vars
        • Q(a);P_SPINQ(a)::R1(E)
        • B(c);P_SPINB(c)::R1(E)
      • Refutation
        • R(d);P_SPINR(d)
  • Actual
    • S(B);
    • Threat
      • R(C)
    • Vars
      • K(f);N_SPINR(d),OGATEB,P-FLIGHT,XS(B)::QAR2(A)
      • Q(a);N_GUARD,SBLOCK,XS(B)::QAB(A)
      • B(c);SBLOCK,XS(B)::QAB(A)
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).