MESON Chess Problem Database

Problem Display
PID: 138134 (1b3R1q/2p3pp/K1N1B2r/2p3n1/2p1kB1R/2Q1Pp2/1n3p2/5b2 w - - 0 1)

Ellerman, Arnoldo

2nd Prize, Deutsches Wochenschach, 1920

1b3R1q/2p3pp/K1N1B2r/2p3n1/2p1kB1R/2Q1Pp2/1n3p2/5b2

#2

8 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6
      • 2.Bh2#
      • 2.Bg3#
      • 2.Be5#
      • 2.Bxg5#
      • 2.Bd6#
      • 2.Bxc7#
    • 1...Bd3
      • 2.Qe5#
    • 1...Sd3
      • 2.Qxc4#
    • 1...Sf7
      • 2.Bxh6#
  • Tries
    • 1.Qc2+?
      • 1...Sd3
        • 2.Qxc4#
      • 1...Bd3!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qe5#
      • 1...Rxe6+
        • 2.Bd6#
      • 1...cxb4
        • 2.Qd4#
      • 1...Sd3
        • 2.Qxc4#
      • 1...Sf7
        • 2.Bxh6#
      • 1...c6
        • 2.Bf5#
      • 1...g6
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::QAR1(A)
    • S(b);N_GUARD,S_CUTB(a)::QAR2(A),XP(e)
    • S(h);OGATE::R(D)+B(C),XR(i)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b),S_CUTB(a)::QAR2(A),XP(e)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(F);P_SPINB(G)
    • Threat
      • QAR1(A)
    • Vars
      • R(i);CHECK,N_GUARD,XB(G)::R(D)+B(C)
      • P(g);N_GUARD,XS(F)::QAR1(A)
      • S(b);N_GUARD,S_CUTB(a)::QAR2(A),XP(e)
      • S(h);OGATE::R(D)+B(C),XR(i)
      • P(j);N_PINB(G)::B(G)
      • P(k);N_PINB(G)::B(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).