MESON Chess Problem Database

Problem Display
PID: 137128 (Kb1R4/n1p5/Q2PR1P1/3kNPq1/p2P1pN1/2P2P2/1n2B3/Br3b2 w - - 0 1)

Koludrovic, Branko

Liga Problemista, 1981/3

Kb1R4/n1p5/Q2PR1P1/3kNPq1/p2P1pN1/2P2P2/1n2B3/Br3b2

#2

14 + 10

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Sxf6#
    • 1...Qh6
      • 2.Sf6#
      • 2.dxc7#
    • 1...Qe7
      • 2.dxe7#
    • 1...Qxg4
      • 2.dxc7#
    • 1...Qxf5
      • 2.dxc7#
    • 1...Qh5
      • 2.Sf6#
      • 2.dxc7#
    • 1...Qxg6
      • 2.dxc7#
    • 1...Sd1
      • 2.Qc4#
      • 2.c4#
    • 1...Sd3
      • 2.Qc4#
      • 2.c4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sb5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qb5#
      • 2.Qxc6#
    • 1...Sc8
      • 2.Qc6#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sb4#
        • 2.Re5#
      • 1...Qxf5
        • 2.dxc7#
      • 1...Sxd3
        • 2.c4#
      • 1...Sb5
        • 2.Sb4#
      • 1...Qf6
        • 2.Sb4#
        • 2.Sxf4#
        • 2.Sxf6#
      • 1...Qe7
        • 2.Sb4#
        • 2.Sxf4#
        • 2.dxe7#
      • 1...Sd1
        • 2.Re5#
        • 2.c4#
      • 1...Sc6
        • 2.Qb5#
      • 1...c5
        • 2.Re5#
      • 1...Sc4!
    • 1.Sc4?
      • threat
        • 2.Re5#
      • 1...Qxf5
        • 2.dxc7#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Qe7
        • 2.dxe7#
      • 1...Sc6
        • 2.Qb5#
      • 1...Sd3!
    • 1.Sc6?
      • threat
        • 2.Sb4#
        • 2.Re5#
      • 1...Qxd8
        • 2.Sb4#
      • 1...Sxc6
        • 2.Qb5#
      • 1...Qf6
        • 2.Sxf6#
        • 2.Sb4#
      • 1...Qe7
        • 2.Sb4#
        • 2.Sxe7#
        • 2.dxe7#
      • 1...Sd1
        • 2.Re5#
        • 2.Qc4#
        • 2.c4#
      • 1...Sd3
        • 2.c4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Qxf5!
    • 1.Bxb2?
      • threat
        • 2.Qc4#
        • 2.c4#
      • 1...Qxf5
        • 2.Qc4#
        • 2.dxc7#
      • 1...Rxb2
        • 2.Qc4#
      • 1...Rc1
        • 2.Qc4#
      • 1...Sb5
        • 2.Qc6#
        • 2.c4#
      • 1...Bxe2!
    • 1.Qd3?
      • threat
        • 2.Qe4#
      • 1...Sxd3
        • 2.c4#
      • 1...Qxf5!
    • 1.Qb5+?
      • 1...c5
        • 2.Qxc5#
      • 1...Sxb5!
    • 1.Qb7+?
      • 1...Sc6
        • 2.Qxc6#
        • 2.Qb5#
      • 1...c6!
    • 1.Qa5+?
      • 1...c5
        • 2.Qxc5#
      • 1...Sb5!
    • 1.Qb6?
      • threat
        • 2.Qc5#
      • 1...Qxf5
        • 2.dxc7#
      • 1...Sd3
        • 2.c4#
      • 1...c5
        • 2.Qxc5#
      • 1...cxb6!
    • 1.c4+?
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Kxd4!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Re5#
      • 1...Qxf5
        • 2.dxc7#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Qe7
        • 2.dxe7#
      • 1...Sd3
        • 2.c4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_GUARD::S(F),XQ(g)
    • Q(g);OGATE::R(N)+P(J),XQ(g)
    • Q(g);N_GUARD,XS(F)::R(N)+P(J),XP(i)
    • Q(g);N_GUARD,XP(H)::R(N)+P(J),XP(i)
    • Q(g);N_GUARD,XP(L)::R(N)+P(J),XP(i)
    • S(c);N_GUARD::QAB1(I),XS(c)
    • S(h);N_GUARD::QAB1(I)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);N_GUARD,XP(H)::R(N)+P(J),XP(i)
        • S(c);N_GUARD,XS(G)::P(C)
        • S(h);::S(G)
        • S(h);N_GUARD,S_CUTP(i)::QAR2(I)
        • P(i);::R1(K)
      • Refutation
        • S(c);
    • Try
      • S(G);
      • Threat
        • R1(K)
      • Vars
        • Q(g);N_GUARD,XP(H)::R(N)+P(J),XP(i)
        • S(c);OGATE,XS(G)::QAB1(I),XS(c)
        • Q(g);N_GUARD::S(F),XQ(g)
        • Q(g);OGATE::R(N)+P(J),XQ(g)
        • S(h);N_GUARD,S_CUTP(i)::QAR2(I)
      • Refutation
        • S(c);
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);XR(N)::S(G)
        • S(h);N_GUARD,XS(G)::QAR2(I)
        • S(c);N_GUARD::P(C)
        • S(c);N_GUARD::QAB1(I),XS(c)
      • Refutation
        • Q(g);XP(H)
    • Try
      • B(A);XS(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XB(A)::QAB1(I)
        • R(a);::QAB1(I)
      • Refutation
        • B(b);XB(B)
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • S(c);N_GUARD,XQ(I)::P(C)
      • Refutation
        • Q(g);XP(H)
    • Try
      • Q(I);CHECK
      • Vars
        • P(i);P_SPINP(i)::QAR1(I),XP(i)
      • Refutation
        • S(h);XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • Q(I);CHECK
      • Vars
        • P(i);P_SPINP(i)::QAR1(I),XP(i)
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • Q(g);N_GUARD,XP(H)::R(N)+P(J),XP(i)
        • S(c);N_GUARD::P(C)
        • P(i);::QAR1(I),XP(i)
      • Refutation
        • P(i);XQ(I)
    • Try
      • P(C);CHECK
      • Vars
        • S(c);OGATE,XP(C)::QAB1(I),XS(c)
      • Refutation
        • K(f);P-FLIGHT,P_SPINS(c),XP(E)
  • Actual
    • S(G);
    • Threat
      • R1(K)
    • Vars
      • Q(g);N_GUARD,XP(H)::R(N)+P(J),XP(i)
      • Q(g);N_GUARD::S(F),XQ(g)
      • Q(g);OGATE::R(N)+P(J),XQ(g)
      • S(c);N_GUARD::P(C)
      • S(c);N_GUARD::QAB1(I),XS(c)
      • S(h);N_GUARD,S_CUTP(i)::QAR2(I)
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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).