MESON Chess Problem Database

Problem Display
PID: 44785 (1K6/N3n3/1B2n1N1/1Bp1R1p1/3k1bR1/p2P1P2/1r1P4/Q2b4 w - - 0 1)

Francey, James

Recomm., BCF 043. Ty., 1942-1943

1K6/N3n3/1B2n1N1/1Bp1R1p1/3k1bR1/p2P1P2/1r1P4/Q2b4

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Qg1#
    • 1...Be2
      • 2.Qg1#
    • 1...Bb3
      • 2.Qg1#
    • 1...Bxf3
      • 2.Qg1#
    • 1...Ba4
      • 2.Qg1#
    • 1...Sc7
      • 2.Bxc5#
    • 1...Sg7
      • 2.Bxc5#
    • 1...Sd8
      • 2.Bxc5#
    • 1...Sf8
      • 2.Bxc5#
    • 1...Sd5
      • 2.Sc6#
    • 1...Sf5
      • 2.Sc6#
    • 1...Sc6+
      • 2.Sxc6#
    • 1...Sxg6
      • 2.Sc6#
    • 1...Sc8
      • 2.Sc6#
    • 1...Sg8
      • 2.Sc6#
    • 1...a2
      • 2.Qxb2#
  • Tries
    • 1.Ba5?
      • threat
        • 2.Bc3#
      • 1...Sc6+
        • 2.Sxc6#
      • 1...Sd5
        • 2.Sc6#
      • 1...c4!
    • 1.Rxf4+?
      • 1...Sxf4
        • 2.Bxc5#
      • 1...gxf4!
    • 1.Qc1?
      • threat
        • 2.Qc3#
        • 2.Qc4#
      • 1...Sc6+
        • 2.Sxc6#
      • 1...Rxd2
        • 2.Qc4#
      • 1...Sxg6
        • 2.Sc6#
        • 2.Qc3#
      • 1...Rb3
        • 2.Qc4#
      • 1...Rb4
        • 2.Qc3#
      • 1...Bc2
        • 2.Qg1#
      • 1...Bb3
        • 2.Qg1#
        • 2.Qc3#
      • 1...Sd5
        • 2.Sc6#
        • 2.Qc4#
      • 1...Rc2!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Sb5#
      • 1...Sc6+
        • 2.Sxc6#
      • 1...Sxg6
        • 2.Sc6#
      • 1...Ba4
        • 2.Qg1#
      • 1...Sc7
        • 2.Re4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 12
  • Sets
    • B(a);OGATE::QAB(A)
    • B(a);OGATE,XP(D)::QAB(A)
    • S(h);N_GUARD,N_PINR(G)::B(H),XP(f)
    • S(h);N_GUARD::B(H),XP(f)
    • S(i);N_GUARD::S(J)
    • S(i);CHECK,N_GUARD::S(J),XS(i)
    • S(i);N_GUARD,XS(I)::S(J)
    • P(c);N_GUARD::QAB(A),XR(b)
  • Tries
    • Try
      • B(H);N_PINP(f),P_SPINB(F)
      • Threat
        • B(H)
      • Vars
        • S(i);CHECK,N_GUARD::S(J),XS(i)
        • S(i);N_GUARD::S(J)
      • Refutation
        • P(f);
    • Try
      • R(E);CHECK,N_SPINR(G),XB(e)
      • Vars
        • S(h);XR(E)::B(H),XP(f)
      • Refutation
        • P(g);XR(E)
    • Try
      • Q(A);N_PINR(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);CHECK,N_GUARD::S(J),XS(i)
        • R(b);XP(B)::QAR1(A)
        • R(b);::QAR1(A)
        • R(b);::QAB1(A)
        • B(a);OGATE::QAB(A)
      • Refutation
        • R(b);
  • Actual
    • B(F);P_SPINB(H)
    • Threat
      • S(J)
    • Vars
      • S(i);CHECK,N_GUARD::S(J),XS(i)
      • S(i);N_GUARD,XS(I)::S(J)
      • B(a);OGATE::QAB(A)
      • S(h);N_PINR(G)::R1(G)
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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).