MESON Chess Problem Database

Problem Display
PID: 72258 (2q3B1/B7/rn1Nnp2/p4Qb1/3k3r/4R3/N1p2P2/2K1R3 w - - 0 1)

Casa, Alex

2nd Prize, Chess, 1953

2q3B1/B7/rn1Nnp2/p4Qb1/3k3r/4R3/N1p2P2/2K1R3

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qd3#
    • 1...Rf4
      • 2.Rd3#
    • 1...Bxe3+
      • 2.fxe3#
    • 1...Sf4
      • 2.Sb5#
    • 1...Sc5
      • 2.Sb5#
    • 1...Sg7
      • 2.Sb5#
      • 2.Qd5#
    • 1...Sd8
      • 2.Sb5#
      • 2.Qd5#
    • 1...Sf8
      • 2.Sb5#
      • 2.Qd5#
  • Tries
    • 1.Bxb6+?
      • 1...Qc5
        • 2.Qd3#
      • 1...Sc5
        • 2.Sb5#
        • 2.Qd3#
        • 2.Qd5#
      • 1...Rxb6!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Sf5#
      • 1...Bxe3+
        • 2.fxe3#
      • 1...Qc5
        • 2.Qd3#
      • 1...Rf4
        • 2.Rd3#
      • 1...Sf4
        • 2.Re4#
      • 1...Sc5
        • 2.Qb2#
      • 1...Sc7
        • 2.Qc4#
      • 1...Sg7
        • 2.Qd5#
      • 1...Sd8
        • 2.Qd5#
      • 1...Sf8
        • 2.Qd5#
      • 1...f5
        • 2.Sxf5#
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(j);N_SPINS(g),SBLOCK::QAR1(F)
    • R(c);N_PINR(E)::R1(E)
    • B(e);CHECK,OGATE,XR(E)::P(D),XB(e)
    • S(h);N_PINR(E)::S(G)
    • S(h);N_SPINS(g)::S(G)
  • Tries
    • Try
      • B(H);CHECK,XS(g)
      • Vars
        • Q(j);P_SPINQ(j)::QAR1(F)
      • Refutation
        • R(f);XB(H)
  • Actual
    • Q(F);
    • Threat
      • S(G)
    • Vars
      • B(e);CHECK,OGATE,XR(E)::P(D),XB(e)
      • Q(j);N_SPINS(g),SBLOCK::QAR1(F)
      • R(c);N_PINR(E)::R1(E)
      • S(h);N_PINR(E)::R1(E)
      • S(h);N_SPINS(g),SBLOCK,S_CUTQ(j)::QAB(F)
      • S(h);S_CUTQ(j)::QAR1(F)
      • S(h);::QAR1(F)
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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).