MESON Chess Problem Database

Problem Display
PID: 142484 (Rbb4k/pp2p3/5PP1/8/5p2/2p4p/B7/K1Q5 w - - 0 1)

Melvin, Herbert A ('Hamel' or Zaak, HA)

The Problemist, 1961

Rbb4k/pp2p3/5PP1/8/5p2/2p4p/B7/K1Q5

#2

6 + 9

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Rxc8#
    • 1...Bd6
      • 2.Rxc8#
    • 1...f3
      • 2.Qh6#
  • Tries
    • 1.f7?
      • threat
        • 2.f8Q#
      • 1...Be6
        • 2.Qxc3#
      • 1...Kg7!
  • Keys
    • 1.Qxc3!
      • threat
        • 2.Qxc8#
      • 1...exf6
        • 2.Qxf6#
      • 1...Be6
        • 2.f7#
      • 1...Bc7
        • 2.Qxh3#
      • 1...Be5
        • 2.Rxc8#
      • 1...Bg4
        • 2.fxe7#
      • 1...Bf5
        • 2.fxe7#
      • 1...Bd7
        • 2.fxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(g);OGATE,P_SPINB(h)::R(F),XB(h)
    • P(c);OGATE::QAR2(B)
  • Tries
    • Try
      • P(D);
      • Threat
        • P=Q
      • Vars
        • B(h);P_SPINB(g),S_CUTP(f)::QAB(B),XP(a)
      • Refutation
        • K(i);S_FLIGHT
  • Actual
    • Q(B);XP(a)
    • Threat
      • QAR(B),XB(h)
    • Vars
      • P(f);OGATE,P_SPINP(f),XP(D)::QAB(B),XP(f)
      • B(h);P_SPINB(g),S_CUTP(f)::QAB(B)+P(D)
      • B(g);P_SPINB(h)::QAR(B),XP(b)
      • B(g);OGATE,P_PINQ(B),P_SPINB(h)::R(F),XB(h)
      • B(h);P_SPINB(g)::QAB(B)+P(D),XP(f)
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).