MESON Chess Problem Database

Problem Display
PID: 58543 (B6b/1q4Qb/2R5/1p1kNN2/1p2pP2/8/8/5K2 w - - 0 1)

Charosh, Mannis

The Chess Review, 1936

B6b/1q4Qb/2R5/1p1kNN2/1p2pP2/8/8/5K2

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Qd7#
      • 2.Qf7#
    • 1...Qxa8
      • 2.Qd7#
      • 2.Qf7#
    • 1...Qb6
      • 2.Qd7#
      • 2.Qf7#
    • 1...Qd7
      • 2.Qxd7#
    • 1...Qf7
      • 2.Qxf7#
    • 1...Qb8
      • 2.Qf7#
    • 1...e3
      • 2.Qg2#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Rd6#
        • 2.Qd4#
        • 2.Qc5#
      • 1...Bxf5
        • 2.Qc5#
      • 1...Bxe5
        • 2.Qc5#
      • 1...e3
        • 2.Qh1#
        • 2.Qg2#
      • 1...Qb6
        • 2.Se7#
        • 2.Rxb6#
        • 2.Rd6#
      • 1...Qa7
        • 2.Rd6#
      • 1...Qe7
        • 2.Sxe7#
        • 2.Rd6#
        • 2.Qd4#
      • 1...Qxc6!
    • 1.Qg8+?
      • 1...Qf7
        • 2.Qxf7#
      • 1...Bxg8!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sxb4#
      • 1...Kxc6
        • 2.Qxb7#
      • 1...Qxc6
        • 2.Qf7#
      • 1...exd3
        • 2.Qg2#
      • 1...e3
        • 2.Qg2#
      • 1...Qe7
        • 2.Se3#
        • 2.Sxe7#
      • 1...b3
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_GUARD::QAR2(F),XQ(e)
    • Q(e);N_GUARD::QAB(F),XQ(e)
    • Q(e);N_GUARD::QAB(F)
    • P(b);OGATEB::QAB(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);XS(D)::QAR1(F)
        • B(g);XS(C)::QAR1(F)
        • Q(e);::B(G)+R(E),DCHECK
      • Refutation
        • Q(e);P_SPINQ(e),XR(E)
    • Try
      • Q(F);CHECK
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e)::QAB(F),XQ(e)
      • Refutation
        • B(f);XQ(F)
  • Actual
    • S(C);
    • Threat
      • S(C),XP(a)
    • Vars
      • K(d);OGATEB,P_SPINQ(e),S_FLIGHT,XR(E)::QAB1(F),XQ(e)
      • Q(e);N_GUARD,P_SPINQ(e),XR(E)::QAB(F)
      • P(b);OGATEB,XS(C)::QAB(F)
      • P(b);OGATEB::QAB(F)
      • P(a);::S(C)
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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).