MESON Chess Problem Database

Problem Display
PID: 22024 (1b4K1/4pQPp/7r/2BN3p/5p2/Rb3kP1/3p1N1P/3qnB2 w - - 0 1)

Ellerman, Arnoldo

2nd Place, Good Companions (February), 1923

1b4K1/4pQPp/7r/2BN3p/5p2/Rb3kP1/3p1N1P/3qnB2

#2

10 + 11

5137 1001 Problemas 1945

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qxh5#
    • 1...Rb6
      • 2.Qxh5#
    • 1...Rc6
      • 2.Qxh5#
    • 1...Rd6
      • 2.Qxh5#
      • 2.Qxf4#
    • 1...Re6
      • 2.Qxh5#
    • 1...Rf6
      • 2.Qxh5#
    • 1...Ba7
      • 2.Qxf4#
  • Tries
    • 1.Rxb3+?
      • 1...Sd3
        • 2.Rxd3#
      • 1...Qxb3!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Qd5#
      • 1...Qc2
        • 2.Be2#
      • 1...Qe2
        • 2.Bxe2#
      • 1...Qb1
        • 2.Be2#
      • 1...Rd6
        • 2.Se6#
      • 1...Re6
        • 2.Qxh5#
      • 1...Sd3
        • 2.Bg2#
      • 1...e5
        • 2.Sg6#
      • 1...e6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(h);N_GUARD::QAB(H),XP(g)
    • R(h);N_GUARD,N_SPINP(f)::QAB(H),XP(g)
    • B(k);N_GUARD::QAR1(H),XP(f)
  • Tries
    • Try
      • R(D);CHECK,XB(d)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R(D),XS(b)
      • Refutation
        • Q(a);XR(D)
  • Actual
    • S(G);P_SPINQ(H),XP(f)
    • Threat
      • QAB(H)
    • Vars
      • Q(a);N_GUARD::B(A)
      • Q(a);N_GUARD::B(A),XQ(a)
      • R(h);N_GUARD,S_CUTB(k)::QAR(H)+S(G)
      • R(h);N_PINQ(H)::QAB(H),XP(g)
      • S(b);N_GUARD,N_SPINB(d)::B(A)
      • P(i);S_CUTB(k)::QAR(H)+S(G)
      • P(i);N_PINQ(H)::QAB(H)
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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).