MESON Chess Problem Database

Problem Display
PID: 142282 (B7/2pp2K1/1pqrp3/N2Pk1p1/6P1/1QP2P1N/8/8 w - - 0 1)

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

L'Italia Scacchistica, 1918

B7/2pp2K1/1pqrp3/N2Pk1p1/6P1/1QP2P1N/8/8

#2

9 + 8

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3
      • 2.Qxc3#
    • 1...Qc4
      • 2.Sxc4#
  • Tries
    • 1.Sc4+?
      • 1...Kxd5
        • 2.Qb5#
      • 1...Qxc4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.c4#
      • 1...Kxd5
        • 2.Qb5#
      • 1...Qxd5
        • 2.Qh2#
      • 1...Qxc3
        • 2.Qxc3#
      • 1...Rxd5
        • 2.Qh2#
      • 1...exd5
        • 2.Qe2#
      • 1...Qb5
        • 2.Qh2#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Qc5
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(d);OGATE,XP(B)::QAB(A),XQ(d)
    • Q(d);N_GUARD::S(F),XQ(d)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINQ(d),XP(G)::QAR2(A)
      • Refutation
        • Q(d);XS(F)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(B)
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINQ(d),XP(G)::QAR2(A)
      • Q(d);XP(G)::QAB(A)
      • Q(d);OGATE,P_SPINQ(d),XP(B)::QAB(A),XQ(d)
      • R(e);SBLOCK,XP(G)::QAB(A)
      • P(f);SBLOCK,XP(G)::QAR(A)
      • Q(d);::QAB(A)
      • Q(d);N_GUARD::S(F),XQ(d)
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).