MESON Chess Problem Database

Problem Display
PID: 187138 (3r3q/1N3n1p/8/N2P2BK/3kP2R/2p2p2/b1Pp4/3QR3 w - - 0 1)

Howard, Kenneth Samuel

The Observer, 1934

(First published on Sun Oct 14 1934)

3r3q/1N3n1p/8/N2P2BK/3kP2R/2p2p2/b1Pp4/3QR3

#2

10 + 9

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Sc6#
    • 1...Rxd5
      • 2.e5#
    • 1...Bc4
      • 2.Sc6#
    • 1...Se5
      • 2.Be3#
  • Tries
    • 1.Qxd2+?
      • 1...Ke5
        • 2.Sc6#
        • 2.Qxc3#
      • 1...cxd2!
  • Keys
    • 1.Bxd2!
      • threat
        • 2.Bf4#
      • 1...Qe5+
        • 2.Bg5#
      • 1...Rxd5+
        • 2.e5#
      • 1...Ke5
        • 2.Bxc3#
      • 1...cxd2
        • 2.Qa1#
      • 1...Bc4
        • 2.Sc6#
      • 1...Se5
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINP(b),S_FLIGHT::S(F)
    • R(h);P_PINB(H),SBLOCK,XP(G)::R(E)+P(D)
    • B(a);SBLOCK::S(F)
    • S(f);SBLOCK::B(H)
  • Tries
    • Try
      • Q(A);CHECK,XP(b)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • B(H);XP(b)
    • Threat
      • QAR(A)+B(H)
    • Vars
      • Q(i);CHECK,SBLOCK::QAR(A)+B(H)
      • R(h);CHECK,SBLOCK,XP(G)::R(E)+P(D)
      • K(e);S_FLIGHT::B(H),XP(c)
      • P(c);OGATEB,P_SPINP(c),XB(H)::QAB(A)
      • B(a);SBLOCK::S(F)
      • S(f);SBLOCK::QAR(A)+B(H),DCHECK
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).