MESON Chess Problem Database

Problem Display
PID: 189669 (1Q6/p5p1/nb2P1P1/2pB4/2Pk3p/P7/2pB1Pn1/2N4K w - - 0 1)

Nagy, Odon

Pesti Naplo, 1911

1Q6/p5p1/nb2P1P1/2pB4/2Pk3p/P7/2pB1Pn1/2N4K

#2

10 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bc7
      • 2.Qb2#
    • 1...Bd8
      • 2.Qb2#
    • 1...Se1
      • 2.Qf4#
    • 1...Se3
      • 2.Qf4#
      • 2.fxe3#
    • 1...Sf4
      • 2.Qxf4#
  • Tries
    • 1.Be3+?
      • 1...Kc3
        • 2.Qe5#
      • 1...Sxe3!
    • 1.Qg3?
      • threat
        • 2.Se2#
        • 2.Sb3#
        • 2.Bc3#
        • 2.Qc3#
      • 1...Sf4
        • 2.Bc3#
        • 2.Qxf4#
        • 2.Qc3#
        • 2.Qe3#
      • 1...Ba5
        • 2.Se2#
        • 2.Sb3#
      • 1...Se3
        • 2.Qf4#
        • 2.Qxe3#
        • 2.fxe3#
      • 1...hxg3!
  • Keys
    • 1.Bh6!
      • threat
        • 2.Bxg7#
      • 1...Kc3
        • 2.Qe5#
      • 1...gxh6
        • 2.Qh8#
      • 1...Bc7
        • 2.Qb2#
      • 1...Bd8
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(g);OGATE::QAB(J)
    • S(b);N_GUARD::QAR2(J)
    • S(b);N_GUARD::QAR2(J),XS(b)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(J)
      • Refutation
        • S(b);XB(C)
    • Try
      • Q(J);
      • Threat
        • DUALS(4)
      • Refutation
        • P(d);XQ(J)
  • Actual
    • B(C);
    • Threat
      • B(C),XP(i)
    • Vars
      • K(c);S_FLIGHT::QAB(J)
      • P(i);OGATEB,XB(C)::QAB(J)
      • B(g);OGATE::QAB(J)
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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).