MESON Chess Problem Database

Problem Display
PID: 173695 (NbBR1Q2/np5p/2k3qR/p4p2/Pp1p1P2/B7/8/1K6 w - - 0 1)

Boros, Sandor

Magyar Sakkvilag, 1934

NbBR1Q2/np5p/2k3qR/p4p2/Pp1p1P2/B7/8/1K6

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Qc5#
      • 2.Qe8#
  • Tries
    • 1.Rxg6+?
      • 1...Bd6
        • 2.Qxd6#
      • 1...hxg6!
    • 1.Qxb4?
      • threat
        • 2.Bxb7#
        • 2.Qc5#
        • 2.Qc4#
        • 2.Qb6#
        • 2.Qxb7#
      • 1...Sxc8
        • 2.Qc5#
        • 2.Qc4#
        • 2.Qb5#
      • 1...Qd6
        • 2.Bxb7#
        • 2.Qc5#
        • 2.Qc4#
        • 2.Qxb7#
      • 1...Bd6
        • 2.Bxb7#
        • 2.Qxb7#
      • 1...Bc7
        • 2.Bxb7#
        • 2.Qc5#
        • 2.Qc4#
        • 2.Qxb7#
      • 1...Sb5
        • 2.Qc5#
        • 2.Qc4#
        • 2.Qxb5#
        • 2.axb5#
      • 1...b5
        • 2.Qc5#
      • 1...b6
        • 2.Qc4#
        • 2.Qxb6#
      • 1...axb4!
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Qc2#
      • 1...Qd6
        • 2.Bd7#
      • 1...Bd6
        • 2.Bd7#
      • 1...Sb5
        • 2.axb5#
      • 1...b3
        • 2.Bd7#
        • 2.Qe4#
      • 1...d3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK,XQ(f)
      • Vars
        • B(j);N_GUARD,P_SPINB(j)::QAR1(I),XB(j)
      • Refutation
        • P(i);XR(E)
    • Try
      • Q(I);XP(a)
      • Threat
        • DUALS(5)
      • Vars
        • P(h);::QAR1(I)
      • Refutation
        • P(c);XQ(I)
  • Actual
    • Q(I);P_SPINQ(I),XP(d)
    • Threat
      • QAR(I)
    • Vars
      • Q(f);N_PINQ(I)::B(G)
      • B(j);N_SPINQ(f),SBLOCK::B(G)
      • S(g);OGATE::P(C),XS(g)
      • P(b);N_PINQ(I)::QAB1(I)
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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).