MESON Chess Problem Database

Problem Display
PID: 83644 (1nr5/4Q2p/B3nN1K/3PP2R/1pNk1p2/1P5R/3P3B/r7 w - - 0 1)

Ellerman, Arnoldo

O Diario, 1943

1nr5/4Q2p/B3nN1K/3PP2R/1pNk1p2/1P5R/3P3B/r7

#2

12 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Bxg1#
    • 1...Ra2
      • 2.Bg1#
    • 1...Ra3
      • 2.Bg1#
    • 1...Ra4
      • 2.Bg1#
    • 1...Ra5
      • 2.Bg1#
    • 1...Rxa6
      • 2.Bg1#
  • Tries
    • 1.Sa3?
      • threat
        • 2.Sb5#
        • 2.Rd3#
      • 1...Rxa3
        • 2.Bg1#
        • 2.Rd3#
      • 1...Sxa6
        • 2.Sb5#
      • 1...bxa3
        • 2.Rd3#
      • 1...Rc3
        • 2.Sb5#
      • 1...Rc4
        • 2.Sb5#
      • 1...Rc5
        • 2.Rd3#
      • 1...Sc5
        • 2.Sc2#
        • 2.Sb5#
      • 1...Sc7
        • 2.Sc2#
        • 2.Rd3#
        • 2.Qxb4#
      • 1...f3!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sb5#
      • 1...Kc5
        • 2.Qa7#
      • 1...Ra5
        • 2.Bg1#
      • 1...Rc5
        • 2.Rd3#
      • 1...Sc7
        • 2.Sf5#
      • 1...f3
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::B(B),XR(a)
    • R(a);N_GUARD::B(B)
    • R(a);N_GUARD,XB(I)::B(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);XB(I)::S(E)
        • P(b);XS(E)::R1(D)
        • R(h);::S(E)
        • R(h);::R1(D)
      • Refutation
        • P(d);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(c);S_FLIGHT::QAB(L)
      • R(a);N_GUARD::B(B)
      • R(h);SBLOCK::R1(D)
      • S(e);::S(E)
      • P(d);::S(E)
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).