MESON Chess Problem Database

Problem Display
PID: 70103 (8/3KpP1P/1pP1PP2/1RQNkrqR/1r1p1Np1/1p6/1n6/b5BB w - - 0 1)

Gvozdjak, Peter

4th Prize, StrateGems, 2006

8/3KpP1P/1pP1PP2/1RQNkrqR/1r1p1Np1/1p6/1n6/b5BB

#2

13 + 11

145 StrateGems 2008
56 The Problemist 2009
23 Die Schwalbe 2012
15323 FIDE Album (2004-2006) 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Sg6#
    • 1...Qg6
      • 2.Sxg6#
    • 1...Rxb5
      • 2.Bxd4#
      • 2.Qxd4#
    • 1...Sd1
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sa4
      • 2.Sd3#
    • 1...Sc4
      • 2.Sd3#
    • 1...exf6
      • 2.Qd6#
  • Tries
    • 1.Sc3+?
      • 1...Kxf4
        • 2.Se2#
      • 1...Kxf6
        • 2.f8Q#
      • 1...bxc5!
    • 1.Sxb6+?
      • 1...Kxf6
        • 2.f8Q#
      • 1...Kxf4!
    • 1.Bh2?
      • threat
        • 2.Sd3#
        • 2.Sg6#
      • 1...Qxf4
        • 2.Bxf4#
      • 1...Rxf4
        • 2.Rxg5#
      • 1...Rxf6
        • 2.Sxb6#
      • 1...Qg6
        • 2.Sd3#
        • 2.Sxg6#
      • 1...Sd3
        • 2.Sxd3#
        • 2.Sg6#
      • 1...d3
        • 2.Sxd3#
        • 2.Sg6#
      • 1...g3!
    • 1.Qc1?
      • threat
        • 2.Qe1#
      • 1...Qxf4
        • 2.Qxf4#
      • 1...Rxf4
        • 2.Qxf4#
      • 1...Rxf6
        • 2.Sxb4#
      • 1...Qh4
        • 2.Sg6#
      • 1...Sd1
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sc4
        • 2.Sd3#
      • 1...d3!
    • 1.h8Q?
      • threat
        • 2.Qb8#
      • 1...Rxf4
        • 2.Sxb6#
      • 1...Rxf6
        • 2.Rxg5#
      • 1...Sc4
        • 2.Sd3#
      • 1...Qg8!
  • Keys
    • 1.Qxe7!
      • threat
        • 2.Qd6#
      • 1...Rxf4
        • 2.Sxb4#
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Sc4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(i);N_GUARD,P_SPINR(h)::S(C)
    • Q(i);N_GUARD,P_SPINR(h)::S(C),XQ(i)
    • S(b);N_GUARD::S(C)
    • S(b);N_GUARD::S(C),XS(b)
    • P(k);N_GUARD,XP(J)::QAB1(E)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(g);S_FLIGHT,XS(C)::S(F)
        • K(g);S_FLIGHT,XP(J)::P=Q
      • Refutation
        • P(j);P_SPINP(j),XQ(E)
    • Try
      • S(F);CHECK,XP(j)
      • Vars
        • K(g);S_FLIGHT,XP(J)::P=Q
      • Refutation
        • K(g);S_FLIGHT,XS(C)
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);OGATE,P_SPINQ(i),P_SPINR(h),XS(C)::B(A),XQ(i)
        • R(h);OGATEB,P_SPINQ(i),P_SPINR(h),XS(C)::R(G),XQ(i)
        • R(h);P_SPINQ(i),SBLOCK,XP(J)::QAR(E)+S(F),XP(j)
      • Refutation
        • P(f);
    • Try
      • Q(E);
      • Threat
        • QAR(E)
      • Vars
        • Q(i);OGATE,P_SPINR(h),XS(C)::QAB1(E),XQ(i)
        • R(h);OGATE,P_SPINQ(i),XS(C)::QAB1(E),XR(h)
        • R(h);P_SPINQ(i),SBLOCK,XP(J)::R(D)+S(F),XR(d)
        • Q(i);N_GUARD,P_SPINR(h)::S(C)
        • S(b);N_GUARD::S(C)
        • S(b);N_GUARD::S(C),XS(b)
      • Refutation
        • P(e);
    • Try
      • P(M);
      • Threat
        • QAB(M)
      • Vars
        • R(h);P_SPINQ(i),SBLOCK,XS(C)::QAR(E)+S(F),XP(j)
        • R(h);OGATEB,P_SPINQ(i),P_SPINR(h),XP(J)::R(G),XQ(i)
        • S(b);N_GUARD::S(C)
      • Refutation
        • Q(i);P_SPINR(h)
  • Actual
    • Q(E);XP(k)
    • Threat
      • QAB1(E)
    • Vars
      • R(h);P_SPINQ(i),SBLOCK,XS(C)::R(D)+S(F),XR(d)
      • R(h);OGATE,P_SPINQ(i),XP(J)::QAB1(E),XR(h)
      • S(b);N_GUARD::S(C)
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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).