MESON Chess Problem Database

Problem Display
PID: 273398 (1bK5/3N1Qp1/5pR1/3PP2p/2pppk2/R2q3B/3N4/6B1 w - - 0 1)

Zilahi, Zoltan

The Problemist, 1932

1bK5/3N1Qp1/5pR1/3PP2p/2pppk2/R2q3B/3N4/6B1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bh2#
    • 1...Qf1
      • 2.Bh2#
    • 1...Qc2
      • 2.Bh2#
    • 1...e3
      • 2.Bh2#
    • 1...f5
      • 2.Qxf5#
  • Tries
    • 1.Bh2+?
      • 1...Qg3
        • 2.Bxg3#
      • 1...Ke3!
    • 1.Rg4+?
      • 1...Kf5
        • 2.Qe6#
        • 2.Qg6#
      • 1...hxg4!
    • 1.Qe6?
      • threat
        • 2.Qf5#
      • 1...e3
        • 2.Bh2#
      • 1...f5
        • 2.Qxf5#
      • 1...Qxh3!
    • 1.Qxg7?
      • threat
        • 2.Rxf6#
        • 2.Qxf6#
        • 2.Qh6#
      • 1...Bxe5
        • 2.Qh6#
      • 1...fxe5
        • 2.Rf6#
        • 2.Qf6#
        • 2.Qh6#
        • 2.Qf8#
        • 2.Qf7#
      • 1...Qg3
        • 2.Rxf6#
        • 2.Qxf6#
      • 1...e3
        • 2.Bh2#
        • 2.Qh6#
      • 1...f5
        • 2.Qh6#
      • 1...Qxh3!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Sd7#
      • 1...Qxh3+
        • 2.Sg4#
      • 1...Kxe5
        • 2.Sd7#
      • 1...Bxe5
        • 2.Sxh5#
      • 1...gxf6
        • 2.Qxf6#
      • 1...e3
        • 2.Bh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::B(A)
    • P(d);SBLOCK,S_CUTQ(a)::B(A)
    • P(g);OGATE::QAR1(I),XP(g)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
      • Refutation
        • K(e);N_SPINP(g),P_SPINQ(a),S_FLIGHT
    • Try
      • R(G);CHECK
      • Refutation
        • P(f);XR(G)
    • Try
      • Q(I);N_PINP(g)
      • Threat
        • QAR1(I)
      • Vars
        • P(d);SBLOCK,S_CUTQ(a)::B(A)
        • P(g);::QAR1(I),XP(g)
      • Refutation
        • Q(a);XB(D)
    • Try
      • Q(I);N_PINP(g),XP(h)
      • Threat
        • DUALS(3)
      • Vars
        • B(i);XP(F)::QAB(I)
        • P(g);::QAB(I)
      • Refutation
        • Q(a);P_PINS(H),XB(D)
  • Actual
    • S(H);XP(g)
    • Threat
      • QAR(I)+S(H)
    • Vars
      • Q(a);CHECK,XB(D)::QAR(I)+S(H)
      • K(e);S_FLIGHT,XP(F)::S(H)
      • B(i);SBLOCK,XP(F)::QAR(I)+S(H),DCHECK,XP(f)
      • P(h);OGATE,P_SPINP(h),XS(H)::QAR2(I),XP(h)
      • P(d);SBLOCK,S_CUTQ(a)::B(A)
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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).