MESON Chess Problem Database

Problem Display
PID: 139760 (n5B1/B2N4/1r3Q1K/3NP1p1/2pkn1bR/8/1PP1R2b/7q w - - 0 1)

Ellerman, Arnoldo

Ajedrez Argentino, 1925

n5B1/B2N4/1r3Q1K/3NP1p1/2pkn1bR/8/1PP1R2b/7q

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Rd2#
    • 1...Bh3
      • 2.Rd2#
    • 1...Bf5
      • 2.Rd2#
    • 1...Bh5
      • 2.Rd2#
    • 1...Be6
      • 2.Rd2#
    • 1...Sc3
      • 2.bxc3#
    • 1...Sd6
      • 2.Qf2#
  • Tries
    • 1.Bxb6+?
      • 1...Sc5
        • 2.Bxc5#
        • 2.Qf2#
      • 1...Sxb6!
    • 1.Qxb6+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sxb6!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sc6#
      • 1...Bxe2
        • 2.Sf5#
      • 1...Bxd7
        • 2.Qd6#
      • 1...Sxf6
        • 2.Sf5#
      • 1...Be6
        • 2.Qf2#
      • 1...Sd2
        • 2.Sf5#
      • 1...Sf2
        • 2.Sf5#
      • 1...Sc3
        • 2.Sf5#
      • 1...Sg3
        • 2.e6#
      • 1...Sc5
        • 2.Sf5#
      • 1...Sd6
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • B(f);P_SPINS(e)::R(C)
    • B(f);N_PINQ(G),P_SPINS(e)::R(C)
    • S(e);OGATE,P_SPINB(f)::P(A),XS(e)
    • S(e);N_PINQ(G),P_SPINB(f)::QAB(G)
  • Tries
    • Try
      • B(I);CHECK,N_SPINQ(G),XR(h)
      • Refutation
        • S(i);XB(I)
    • Try
      • Q(G);CHECK,N_SPINQ(G),XR(h)
      • Vars
        • S(e);N_GUARD,P_SPINB(f),P_SPINS(e)::QAB1(G),XS(e)
      • Refutation
        • S(i);P_SPINS(i),XQ(G)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • B(f);N_GUARD,P_SPINS(e),XR(C)::S(E)
      • B(f);P_SPINS(e),XS(J)::QAR2(G)
      • S(e);P_SPINB(f),XQ(G)::S(E)
      • B(f);N_PINQ(G),P_SPINS(e)::QAB(G)
      • S(e);P_SPINB(f)::S(E)
      • S(e);N_GUARD,P_SPINB(f),S_CUTB(b)::QAB(G)+P(F)
      • S(e);N_SPINR(h),P_SPINB(f)::S(E)
      • S(e);N_PINQ(G),P_SPINB(f)::QAB(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).