MESON Chess Problem Database

Problem Display
PID: 240124 (b7/b1B1p3/2n1Pp2/4q2R/1r2Nkp1/rn6/P3Q2R/4KN2 w - - 0 1)

Zilahi, Zoltan

Skakbladet, 1939

b7/b1B1p3/2n1Pp2/4q2R/1r2Nkp1/rn6/P3Q2R/4KN2

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rf2#
      • 2.Qe3#
    • 1...Rb6
      • 2.Rf2#
      • 2.Qe3#
    • 1...Bf2+
      • 2.Rxf2#
    • 1...Be3
      • 2.Qxe3#
    • 1...Bb8
      • 2.Rf2#
      • 2.Qe3#
    • 1...Sd4
      • 2.Qe3#
    • 1...g3
      • 2.R2h4#
  • Tries
    • 1.Qf3+?
      • 1...gxf3
        • 2.R2h4#
      • 1...Kxf3!
  • Keys
    • 1.Seg3!
      • threat
        • 2.Rf5#
      • 1...Bf2+
        • 2.Rxf2#
      • 1...Sbd4
        • 2.Qe4#
      • 1...Scd4
        • 2.Qe3#
      • 1...f5
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(i);CHECK,N_GUARD::R(E),XB(i)
    • B(i);N_GUARD::QAB1(D),XB(i)
    • S(g);S_CUTB(i)::QAB1(D)
    • P(e);OGATEB::R(E)
  • Tries
    • Try
      • Q(D);CHECK,P_SPINS(F)
      • Vars
        • P(e);SBLOCK,XQ(D)::R(E)
      • Refutation
        • K(d);N_SPINQ(f),P-FLIGHT,XQ(D)
  • Actual
    • S(F);P_SPINQ(D)
    • Threat
      • R1(G)
    • Vars
      • B(i);CHECK,N_GUARD::R(E),XB(i)
      • S(b);S_CUTR(c)::QAR1(D)
      • S(g);S_CUTB(i)::QAB1(D)
      • P(h);::R1(G),XP(h)
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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).