MESON Chess Problem Database

Problem Display
PID: 201669 (1n1R2K1/1P2B3/r1kN4/6Q1/7p/4N2p/5br1/1R5B w - - 0 1)

Ellerman, Arnoldo

Magyar Sakkvilag, 1922

1n1R2K1/1P2B3/r1kN4/6Q1/7p/4N2p/5br1/1R5B

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Rc1#
    • 1...Sd7
      • 2.Rc8#
  • Tries
    • 1.Se8?
      • threat
        • 2.Rd6#
        • 2.Qg6#
      • 1...Bg3
        • 2.Qb5#
        • 2.Qc5#
        • 2.Qd5#
      • 1...Sd7
        • 2.Rc8#
      • 1...Rb6!
    • 1.Bxg2+?
      • 1...Kc7
        • 2.Se8#
      • 1...hxg2!
    • 1.Qxg2+?
      • 1...Kc5
        • 2.Qd5#
      • 1...Kc7
        • 2.Se8#
      • 1...hxg2!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Se8#
      • 1...Kc5
        • 2.Se4#
      • 1...Kc7
        • 2.Se8#
      • 1...Rb6
        • 2.Rc1#
      • 1...Bg3
        • 2.Qc2#
      • 1...Sd7
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::R(A)
    • S(g);SBLOCK::R(H)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);SBLOCK::R(H)
      • Refutation
        • R(e);
    • Try
      • B(B);CHECK,N_SPINQ(D),XR(b)
      • Vars
        • K(f);P-FLIGHT::S(E)
      • Refutation
        • P(c);XB(B)
    • Try
      • Q(D);CHECK,N_SPINQ(D),XR(b)
      • Vars
        • K(f);P-FLIGHT::QAR1(D)
        • K(f);P-FLIGHT::S(E)
      • Refutation
        • P(c);P_SPINP(c),XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+S(E)
    • Vars
      • K(f);N_SPINR(b),P-FLIGHT::B(G)+S(E),DCHECK
      • K(f);N_SPINR(b),P-FLIGHT::S(E)
      • R(e);SBLOCK::R(A)
      • B(a);N_PINQ(D)::QAR(D)
      • S(g);SBLOCK::R(H)
HTML5 logo

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).