MESON Chess Problem Database

Problem Display
PID: 83461 (8/K7/2p3B1/n7/2p4p/P1k1p2Q/1p1N3p/3RB1b1 w - - 0 1)

Ellerman, Arnoldo

Good Companions (December), 1916

8/K7/2p3B1/n7/2p4p/P1k1p2Q/1p1N3p/3RB1b1

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Sb1#
  • Tries
    • 1.Bxh4?
      • threat
        • 2.Bf6#
      • 1...Sb3
        • 2.Sb1#
      • 1...Kd4!
    • 1.Qf3?
      • threat
        • 2.Qf6#
      • 1...Sb3
        • 2.Sb1#
      • 1...Kd4!
    • 1.Qg3?
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Sb3#
        • 2.Se4#
      • 1...Sb3
        • 2.Sb1#
      • 1...hxg3!
  • Keys
    • 1.Bg3!
      • threat
        • 2.Be5#
      • 1...exd2+
        • 2.Bf2#
      • 1...e2+
        • 2.Bf2#
      • 1...Kd4
        • 2.Se4#
      • 1...hxg3
        • 2.Qh8#
      • 1...Sb3
        • 2.Sb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(h);SBLOCK::B(B)+S(C),DCHECK
  • Tries
    • Try
      • B(B);XP(g)
      • Threat
        • B(B)
      • Vars
        • S(h);SBLOCK::S(C)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • S(h);SBLOCK::B(B)+S(C),DCHECK
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • S(h);SBLOCK::B(B)+S(C),DCHECK
      • Refutation
        • P(g);N_SPINP(e),XQ(E)
  • Actual
    • B(B);N_PINP(e)
    • Threat
      • B(B)
    • Vars
      • P(e);CHECK,OGATEB,XS(C)::QAR(E)+B(B)
      • P(e);CHECK,OGATEB::QAR(E)+B(B)
      • K(d);S_FLIGHT::R(A)+S(C)
      • P(g);OGATE,XB(B)::QAB(E)
      • S(h);SBLOCK::S(C)
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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).