MESON Chess Problem Database

Problem Display
PID: 57510 (1R6/K3N2B/2p2B2/2p1n2b/p1k1p3/2N3q1/1P2n3/3Q4 w - - 0 1)

Korponai, Jozsef

Chess Life, 1956

1R6/K3N2B/2p2B2/2p1n2b/p1k1p3/2N3q1/1P2n3/3Q4

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qxa4#
    • 1...Sf3
      • 2.Qxe2#
    • 1...Sg6
      • 2.Bg8#
    • 1...e3
      • 2.Qxa4#
  • Tries
    • 1.Rb4+?
      • 1...Kxb4
        • 2.Qxa4#
      • 1...cxb4!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Sd6#
      • 1...Qd3
        • 2.Qxa4#
      • 1...Sd3
        • 2.Sd2#
      • 1...Sf3
        • 2.Qxe2#
      • 1...Sg4
        • 2.Sd2#
      • 1...Sg6
        • 2.Bg8#
      • 1...Sd7
        • 2.Sd2#
      • 1...Sf7
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK::QAR2(A),XP(c)
    • S(g);N_GUARD,S_CUTB(h),S_CUTQ(b)::QAB(A),XS(a)
    • S(g);N_GUARD,S_CUTB(h),S_CUTQ(b)::B(G)
    • P(e);::QAR2(A),XP(c)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • K(d);P-FLIGHT,XR(H)::QAR1(A),XP(c)
      • Refutation
        • P(f);XR(H)
  • Actual
    • S(C);XP(e)
    • Threat
      • S(C)
    • Vars
      • Q(b);SBLOCK::QAR2(A),XP(c)
      • S(g);::S(C)
      • S(g);N_GUARD,S_CUTB(h),S_CUTQ(b)::QAB(A),XS(a)
      • S(g);N_GUARD,S_CUTB(h),S_CUTQ(b)::B(G)
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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).