MESON Chess Problem Database

Problem Display
PID: 45937 (2r1N1q1/8/rR3pb1/2PPkPpp/8/nPP2Q1P/1Bn1K1N1/1B6 w - - 0 1)

Karpov, Valery N

2nd Comm., 01. Tungsram Cup, 1978

2r1N1q1/8/rR3pb1/2PPkPpp/8/nPP2Q1P/1Bn1K1N1/1B6

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qe4#
      • 2.c4#
    • 1...Se1
      • 2.Qe4#
      • 2.c4#
    • 1...Se3
      • 2.Qe4#
      • 2.c4#
    • 1...Sb4
      • 2.Qe4#
      • 2.cxb4#
      • 2.c4#
    • 1...Sd4+
      • 2.cxd4#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Qe4#
      • 1...Sd4+
        • 2.cxd4#
      • 1...Qxd5
        • 2.Qg3#
      • 1...Bxf5
        • 2.Qxf5#
      • 1...Ra4!
    • 1.Sxf6?
      • threat
        • 2.Sd7#
        • 2.Qe4#
      • 1...Sd4+
        • 2.cxd4#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Rxb6
        • 2.Sd7#
      • 1...Bxf5
        • 2.Qg3#
      • 1...Rc6
        • 2.Sd7#
      • 1...Qf7
        • 2.Qe4#
      • 1...Qh7
        • 2.Qe4#
      • 1...Qg7
        • 2.Qe4#
      • 1...Qd8
        • 2.Qe4#
      • 1...Qe8
        • 2.Qe4#
      • 1...Ra4
        • 2.Sd7#
      • 1...Ra7
        • 2.Qe4#
      • 1...Rc7
        • 2.Qe4#
      • 1...Rd8
        • 2.Qe4#
      • 1...Be8
        • 2.Qe4#
      • 1...Qe6!
    • 1.Bxc2?
      • threat
        • 2.Qe4#
        • 2.c4#
      • 1...Qxd5
        • 2.Qg3#
      • 1...Bxf5
        • 2.Qxf5#
        • 2.c4#
      • 1...Ra4
        • 2.c4#
      • 1...Sb1
        • 2.Qe4#
      • 1...Sc4
        • 2.Qe4#
      • 1...Sb5
        • 2.Qe4#
      • 1...Sxc2!
  • Keys
    • 1.Qe3+!
      • 1...Kxd5
        • 2.Sxf6#
      • 1...Kxf5
        • 2.Sd6#
      • 1...Sxe3
        • 2.c4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);CHECK,OGATE::P(F),XS(a)
  • Tries
    • Try
      • S(M);
      • Threat
        • QAR1(G)
      • Vars
        • S(a);CHECK,OGATE::P(F),XS(a)
        • Q(j);SBLOCK,XP(J)::QAB(G)
        • B(h);OGATE,XP(K)::QAR1(G),XB(h)
      • Refutation
        • R(f);
    • Try
      • S(M);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,OGATE::P(F),XS(a)
        • Q(j);OGATE,XP(J)::QAR1(G),XQ(j)
        • R(f);XR(L)::S(M)
        • B(h);SBLOCK,XP(K)::QAB(G)
        • R(i);::S(M)
        • Q(j);::QAR1(G)
        • R(f);::S(M)
        • R(f);::QAR1(G)
        • R(i);::QAR1(G)
        • B(h);::QAR1(G)
      • Refutation
        • Q(j);
    • Try
      • B(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);SBLOCK,XP(J)::QAB(G)
        • R(f);::B(B)+P(F)
        • S(b);::QAR1(G)
      • Refutation
        • S(b);XB(A)
  • Actual
    • Q(G);CHECK
    • Vars
      • K(c);P-FLIGHT,XP(J)::S(M),XP(g)
      • K(c);P-FLIGHT,P_SPINS(a),XP(K)::S(M)
      • S(a);XQ(G)::B(B)+P(F)
HTML5 logo

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).