MESON Chess Problem Database

Problem Display
PID: 250893 (3r3q/QPNP2pb/1p2R3/2pP2K1/Np1k1P2/1P1p4/3pnPP1/3B2B1 w - - 0 1)

Janevski, Zivko

Uralski Problemist, 2011

3r3q/QPNP2pb/1p2R3/2pP2K1/Np1k1P2/1P1p4/3pnPP1/3B2B1

#2

14 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.f3#
    • 1...Sc3
      • 2.f3#
    • 1...Sg3
      • 2.fxg3#
      • 2.f3#
    • 1...Sxf4
      • 2.f3#
    • 1...c4
      • 2.Qxb6#
    • 1...b5
      • 2.Qxc5#
  • Tries
    • 1.Re4+?
      • 1...Kxe4
        • 2.f3#
      • 1...Bxe4!
    • 1.Re5?
      • threat
        • 2.Sb5#
        • 2.Se6#
      • 1...Qe8
        • 2.Sb5#
      • 1...Qg8
        • 2.Sb5#
      • 1...Re8
        • 2.Sb5#
      • 1...Bf5
        • 2.Sb5#
      • 1...Bg8
        • 2.Sb5#
      • 1...Sc3
        • 2.Se6#
        • 2.f3#
      • 1...b5
        • 2.Sxb5#
        • 2.Se6#
        • 2.Qxc5#
      • 1...Sxf4!
    • 1.Rxb6?
      • threat
        • 2.Rxb4#
      • 1...Ke4
        • 2.f3#
      • 1...c4
        • 2.Re6#
      • 1...Sxf4!
    • 1.Qa6?
      • threat
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
        • 2.Qxb6#
      • 1...b5!
  • Keys
    • 1.Sxb6!
      • threat
        • 2.Sb5#
      • 1...Kc3
        • 2.Qa1#
      • 1...c4
        • 2.Sa4#
      • 1...Sc3
        • 2.f3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::B(B)+P(C)
    • S(b);N_GUARD,XP(G)::B(B)+P(C)
    • P(f);OGATEB,P_SPINP(g)::QAB(K),XP(g)
    • P(g);OGATE,P_SPINP(f)::QAB1(K),XP(f)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • K(e);P-FLIGHT,XR(J)::P(C)
      • Refutation
        • B(i);XR(J)
    • Try
      • R(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(k);::S(M)
        • R(j);::S(M)
        • B(i);::S(M)
      • Refutation
        • S(b);XP(G)
    • Try
      • R(J);XP(g)
      • Threat
        • R(J),XP(d)
      • Vars
        • K(e);P-FLIGHT,S_CUTS(b)::P(C)
        • P(f);OGATEB::QAB(K)+R(J)
      • Refutation
        • S(b);XP(G)
    • Try
      • Q(K);
      • Threat
        • QAR1(K)
      • Refutation
        • P(g);
  • Actual
    • S(F);XP(g)
    • Threat
      • S(M)
    • Vars
      • K(e);S_CUTS(b),S_FLIGHT::QAB(K)
      • P(f);::QAB(K)+S(F)
      • S(b);N_GUARD,SBLOCK::B(B)+P(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).