MESON Chess Problem Database

Problem Display
PID: 190270 (B5N1/2pK1p2/2rb1r2/3QNk2/2P2p1P/4P3/1n6/Bq3b2 w - - 0 1)

Persa, Istvan

Schweizerische Schachzeitung, 1983

B5N1/2pK1p2/2rb1r2/3QNk2/2P2p1P/4P3/1n6/Bq3b2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.e4#
    • 1...Qxa1
      • 2.e4#
    • 1...Qc1
      • 2.e4#
    • 1...Qd1
      • 2.e4#
    • 1...Be7
      • 2.Sxe7#
    • 1...Sd3
      • 2.e4#
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxf4#
      • 1...Kxe5
        • 2.Qd5#
      • 1...Rxc4
        • 2.Qh5#
      • 1...Bxe5
        • 2.Se7#
      • 1...Qe4
        • 2.Qh5#
      • 1...Sd3
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::P(B)
    • Q(a);N_GUARD,XB(A)::P(B)
    • B(g);N_GUARD::S(I),XB(g)
    • S(c);S_CUTQ(a)::P(B)
  • Actual
    • Q(E);P_PINP(d)
    • Threat
      • QAR1(E),XP(d)
    • Vars
      • K(e);N_SPINP(d),OGATEB,P-FLIGHT,P_SPINS(c),XS(F)::QAR1(E)
      • R(f);XP(C)::QAR2(E)
      • B(g);N_GUARD,SBLOCK,XS(F)::S(I)
      • Q(a);SBLOCK::QAR2(E)
      • S(c);S_CUTQ(a)::P(B)
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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).