MESON Chess Problem Database

Problem Display
PID: 201412 (b1B4n/b1p2N2/Q7/B5Np/R1r1pk1n/5p1P/2P2p1P/5K2 w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1922

b1B4n/b1p2N2/Q7/B5Np/R1r1pk1n/5p1P/2P2p1P/5K2

#2

10 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Bd2#
    • 1...Rc6
      • 2.Rxe4#
    • 1...e3
      • 2.Bxc7#
  • Tries
    • 1.Qd6+?
      • 1...Ke3
        • 2.Bd2#
        • 2.Qd2#
      • 1...cxd6!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Sh7#
      • 1...Ke3
        • 2.Se6#
      • 1...Sxf7
        • 2.Sxf7#
      • 1...Rc5
        • 2.Bd2#
      • 1...Rc6
        • 2.Rxe4#
      • 1...Sf5
        • 2.Se6#
      • 1...e3
        • 2.Bxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);P_SPINP(d),S_CUTB(h)::B(F)
    • R(c);OGATE,P_SPINP(d)::R1(E),XP(d)
    • P(d);P_SPINR(c),SBLOCK::B(F),XP(i)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • P(i);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+S(G)
    • Vars
      • K(e);S_FLIGHT::QAB(H)+S(G)
      • S(k);XS(I)::QAB(H)+S(G),XS(k)
      • R(c);P_SPINP(d),S_CUTB(h)::B(F)
      • R(c);OGATE,P_SPINP(d)::R1(E),XP(d)
      • S(f);SBLOCK::QAB(H)+S(G),DCHECK
      • P(d);P_SPINR(c),SBLOCK::B(F),XP(i)
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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).