MESON Chess Problem Database

Problem Display
PID: 54172 (3n1rb1/3Q3r/R2Np2b/1q1k1p2/1P6/n1PPR1B1/6N1/2K5 w - - 0 1)

Spence, Jack Lee

Chess Life, 1956

3n1rb1/3Q3r/R2Np2b/1q1k1p2/1P6/n1PPR1B1/6N1/2K5

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Sf7#
    • 1...Qa5
      • 2.Sf7#
    • 1...Rh8
      • 2.Sxb5#
    • 1...Bxe3+
      • 2.Sxe3#
    • 1...Bf4
      • 2.Sxf4#
    • 1...Bg7
      • 2.Sf4#
      • 2.Sxb5#
    • 1...Bf7
      • 2.Sxb5#
    • 1...Sb1
      • 2.Qxb5#
    • 1...Sc2
      • 2.Qxb5#
    • 1...Sc4
      • 2.Qxb5#
    • 1...Sc6
      • 2.Sf7#
    • 1...Sf7
      • 2.Qxe6#
  • Keys
    • 1.Bf4!
      • threat
        • 2.Re5#
      • 1...Bxf4
        • 2.Sxf4#
      • 1...Bg7
        • 2.Sxb5#
      • 1...Sc4
        • 2.Qxb5#
      • 1...Sc6
        • 2.Sf7#
      • 1...Sf7
        • 2.Qxe6#
      • 1...e5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(b);N_GUARD,P_PINP(C)::QAR(J)+S(I)
    • Q(b);N_GUARD::QAR(J)+S(I)
    • R(g);N_GUARD::QAR(J)+S(I),XQ(b)
    • B(f);CHECK,XR(E)::S(B),XB(f)
    • B(f);N_GUARD::S(B),XB(f)
    • B(j);S_CUTR(g)::QAR(J)+S(I),XQ(b)
    • S(a);N_GUARD::QAR2(J),XQ(b)
    • S(h);S_CUTQ(b)::QAR(J)+S(I)
    • S(h);N_GUARD,S_CUTB(j)::QAB1(J),XP(e)
  • Actual
    • B(F);N_SPINR(E)
    • Threat
      • R1(E)
    • Vars
      • B(f);P_PINR(E),XB(F)::S(B),XB(f)
      • B(f);S_CUTR(g)::QAR(J)+S(I),XQ(b)
      • S(a);N_GUARD::QAR2(J),XQ(b)
      • S(h);S_CUTQ(b)::QAR(J)+S(I)
      • S(h);N_GUARD,S_CUTB(j)::QAB1(J),XP(e)
      • P(e);::R1(E),XP(e)
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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).