MESON Chess Problem Database

Problem Display
PID: 139950 (2b1rq2/5p1Q/2Bb1N2/N1P2P2/1R6/Kn1pk1P1/6Rn/8 w - - 0 1)

Bron, Vladimir Akimovich

2nd Comm., BCF 128. Ty., 1971-1972

2b1rq2/5p1Q/2Bb1N2/N1P2P2/1R6/Kn1pk1P1/6Rn/8

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Sg4#
    • 1...Sf3
      • 2.Sg4#
      • 2.Sd5#
    • 1...Sg4
      • 2.Sxg4#
    • 1...Sd4
      • 2.Sc4#
  • Tries
    • 1.Re4+?
      • 1...Kf3
        • 2.Re5#
        • 2.Re6#
        • 2.Re7#
        • 2.Rxe8#
      • 1...Rxe4!
    • 1.Qh4?
      • threat
        • 2.Sc4#
      • 1...Sxa5
        • 2.Qd4#
      • 1...Re4
        • 2.Qxe4#
      • 1...d2
        • 2.Rxb3#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Be6
        • 2.Qe4#
      • 1...Sg4
        • 2.Sxg4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Ba6!
    • 1.Qh6+?
      • 1...Bf4
        • 2.Qxf4#
      • 1...Qxh6!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Sd5#
      • 1...d2
        • 2.Qe2#
      • 1...Re5
        • 2.Qg5#
      • 1...Be6
        • 2.Re4#
      • 1...Sg4
        • 2.Sxg4#
      • 1...Sd4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::S(I)
    • S(a);N_GUARD::S(I),XS(a)
    • S(b);SBLOCK::S(E)
  • Tries
    • Try
      • R(D);CHECK,P_SPINP(F)
      • Refutation
        • R(h);XR(D)
    • Try
      • Q(J);
      • Threat
        • S(E)
      • Vars
        • S(b);N_GUARD,XS(E)::QAB1(J)
        • R(h);N_GUARD::QAR1(J),XR(h)
        • P(c);OGATEB::R(D),XS(b)
        • B(e);N_GUARD::QAB1(J),XB(e)
        • B(g);S_CUTR(h)::QAR1(J)
        • S(a);N_GUARD::S(I),XS(a)
        • S(b);N_GUARD::QAB1(J)
      • Refutation
        • B(g);
    • Try
      • Q(J);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAB1(J),XB(e)
      • Refutation
        • Q(i);XQ(J)
  • Actual
    • Q(J);
    • Threat
      • S(I)
    • Vars
      • P(c);N_GUARD::QAR1(J)
      • R(h);S_CUTB(e)::QAB(J)
      • B(g);S_CUTR(h)::R1(D)
      • S(a);N_GUARD::S(I),XS(a)
      • S(b);SBLOCK::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).