MESON Chess Problem Database

Problem Display
PID: 53220 (8/3P4/2p2p2/2N2q1Q/P1Pk1PP1/K2N4/5P1P/2RR4 w - - 0 1)

Burger, Robert Eugene

Chess Life, 1954

8/3P4/2p2p2/2N2q1Q/P1Pk1PP1/K2N4/5P1P/2RR4

#2

13 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3+
      • 2.Rxd3#
    • 1...Qe4
      • 2.Sb3#
    • 1...Qe6
      • 2.Se1#
      • 2.Sb2#
      • 2.Sb4#
    • 1...Qg6
      • 2.d8Q#
      • 2.d8R#
    • 1...Qxd7
      • 2.Se1#
      • 2.Sb2#
      • 2.Sb4#
    • 1...Qxf4
      • 2.Sxf4#
    • 1...Qxc5+
      • 2.Sxc5#
  • Tries
    • 1.Se1+?
      • 1...Qd3+
        • 2.Rxd3#
      • 1...Kxc5!
    • 1.Sb2+?
      • 1...Qd3+
        • 2.Rxd3#
      • 1...Kxc5!
    • 1.Sb4+?
      • 1...Qd3+
        • 2.Rxd3#
      • 1...Kxc5!
    • 1.Se6+?
      • 1...Qxe6
        • 2.Sc5#
      • 1...Ke4!
    • 1.Qh7?
      • 1...Qxd3+
        • 2.Sb3#
      • 1...Qxc5+
        • 2.Sb4#
      • 1...Qxg4
        • 2.Sb3#
        • 2.Qe4#
      • 1...Qxd7
        • 2.Sb3#
        • 2.Qe4#
        • 2.Qxd7#
      • 1...Qxf4
        • 2.Sb3#
        • 2.Se6#
      • 1...Qe4
        • 2.Sb3#
        • 2.Qxe4#
      • 1...Qe6
        • 2.Sb3#
        • 2.Sxe6#
      • 1...Qg6
        • 2.d8Q#
        • 2.d8R#
      • 1...Qd5
        • 2.Sb3#
      • 1...Qe5
        • 2.Sb3#
      • 1...Qg5
        • 2.Sb3#
        • 2.Se6#
        • 2.Qe4#
      • 1...Qh5
        • 2.Sb3#
        • 2.Se6#
        • 2.Qe4#
      • 1...Qxh7!
    • 1.d8Q+?
      • 1...Qd7
        • 2.Se1#
        • 2.Sb2#
        • 2.Sb4#
        • 2.Qxf6#
        • 2.Qxd7#
      • 1...Qd5!
    • 1.d8S?
      • threat
        • 2.Sxc6#
      • 1...Qxd3+
        • 2.Rxd3#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Qe4
        • 2.Sb3#
      • 1...Qe6
        • 2.Se1#
        • 2.Sb2#
        • 2.Sb4#
        • 2.Sdxe6#
      • 1...Qd7
        • 2.Se1#
        • 2.Sb2#
        • 2.Sb4#
      • 1...Qc8
        • 2.Se1#
        • 2.Sb2#
        • 2.Sb4#
      • 1...Qd5!
    • 1.d8R+?
      • 1...Qd7
        • 2.Se1#
        • 2.Sb2#
        • 2.Sb4#
        • 2.Rxd7#
      • 1...Qd5!
  • Keys
    • 1.Qg6!
      • 1...Qxd3+
        • 2.Sb3#
      • 1...Qxc5+
        • 2.Sb4#
      • 1...Qxg4
        • 2.Sb3#
        • 2.Qe4#
        • 2.Qxf6#
      • 1...Qxg6
        • 2.d8Q#
        • 2.d8R#
      • 1...Qxd7
        • 2.Sb3#
        • 2.Qe4#
        • 2.Qxf6#
      • 1...Qxf4
        • 2.Sb3#
        • 2.Se6#
      • 1...Qe4
        • 2.Sb3#
        • 2.Qxe4#
      • 1...Qe6
        • 2.Sb3#
        • 2.Sxe6#
      • 1...Qd5
        • 2.Sb3#
      • 1...Qe5
        • 2.Sb3#
      • 1...Qg5
        • 2.Sb3#
        • 2.Se6#
        • 2.Qe4#
      • 1...Qh5
        • 2.Sb3#
        • 2.Se6#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(F)::R1(B),XQ(b)
    • Q(b);SBLOCK::S(K)
    • Q(b);N_GUARD::P=Q
    • Q(b);XP(I)::R(B)+S(F),XQ(b)
    • Q(b);CHECK,XS(K)::R(B)+S(F),XQ(b)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • Q(b);CHECK,N_GUARD,P_SPINQ(b)::R1(B),XQ(b)
      • Refutation
        • K(a);P_SPINQ(b),S_FLIGHT,XS(K)
    • Try
      • S(F);CHECK
      • Vars
        • Q(b);CHECK,N_GUARD,P_SPINQ(b)::R1(B),XQ(b)
      • Refutation
        • K(a);P_SPINQ(b),S_FLIGHT,XS(K)
    • Try
      • S(F);CHECK
      • Vars
        • Q(b);CHECK,N_GUARD,P_SPINQ(b)::R1(B),XQ(b)
      • Refutation
        • K(a);P_SPINQ(b),S_FLIGHT,XS(K)
    • Try
      • S(K);CHECK
      • Vars
        • Q(b);XS(K)::R(B)+S(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(L);
      • Vars
        • Q(b);CHECK,P_SPINQ(b),XS(F)::S(K)
        • Q(b);CHECK,N_GUARD,SBLOCK,XS(K)::R(B)+S(F)
        • Q(b);N_GUARD::P=Q
        • Q(b);::S(K)
      • Refutation
        • Q(b);XQ(L)
    • Try
      • P(M);CHECK
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • P(M);
      • Threat
        • S(M),XP(c)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XS(F)::R1(B),XQ(b)
        • Q(b);CHECK,XS(K)::R(B)+S(F),XQ(b)
        • Q(b);SBLOCK::S(K)
      • Refutation
        • Q(b);
    • Try
      • P(M);CHECK
      • Refutation
        • Q(b);P_SPINQ(b)
  • Actual
    • Q(L);
    • Vars
      • Q(b);CHECK,P_SPINQ(b),XS(F)::S(K)
      • Q(b);CHECK,N_GUARD,SBLOCK,XS(K)::R(B)+S(F)
      • Q(b);N_GUARD,XQ(L)::P=Q
      • Q(b);::S(K)
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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).