MESON Chess Problem Database

Problem Display
PID: 147732 (8/3p4/2pP2n1/1pQ2p2/1p1P1k2/1P1K1NpP/3P2P1/8 w - - 0 1)

Zilahi, Zoltan

L'Italia Scacchistica, 1930

8/3p4/2pP2n1/1pQ2p2/1p1P1k2/1P1K1NpP/3P2P1/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sh4
      • 2.Qe5#
    • 1...Se5+
      • 2.Qxe5#
    • 1...Se7
      • 2.Qe5#
    • 1...Sf8
      • 2.Qe5#
    • 1...Sh8
      • 2.Qe5#
  • Tries
    • 1.Kc2?
      • 1...Sh4
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Se7
        • 2.Qe5#
      • 1...Sf8
        • 2.Qe5#
      • 1...Sh8
        • 2.Qe5#
      • 1...Ke4!
    • 1.Ke2?
      • 1...Sh4
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Se7
        • 2.Qe5#
      • 1...Sf8
        • 2.Qe5#
      • 1...Sh8
        • 2.Qe5#
      • 1...Ke4!
    • 1.d5?
      • threat
        • 2.Qe3#
        • 2.Qxb4#
        • 2.Qd4#
      • 1...cxd5
        • 2.Qe3#
        • 2.Qd4#
      • 1...Se5+!
  • Keys
    • 1.Qxb4!
      • threat
        • 2.d5#
      • 1...Se5+
        • 2.dxe5#
      • 1...c5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(g);N_GUARD::QAB1(H)
    • S(g);CHECK,N_GUARD::QAB1(H),XS(g)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • S(g);N_GUARD::QAB1(H)
        • S(g);N_GUARD::QAB1(H),XS(g)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • S(g);N_GUARD::QAB1(H)
        • S(g);N_GUARD::QAB1(H),XS(g)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(G);
      • Threat
        • DUALS(3)
      • Refutation
        • S(g);CHECK
  • Actual
    • Q(H);XP(b)
    • Threat
      • QAR(H)+P(G)
    • Vars
      • S(g);CHECK,OGATE::QAR(H)+P(G),XS(g)
      • P(f);OGATE::QAR(H)+P(G),XP(f)
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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).