MESON Chess Problem Database

Problem Display
PID: 274545 (2R5/3NK2b/P4p2/2p5/Pqk1P3/1p2Q3/3B4/1n6 w - - 0 1)

Ward, A (Miss)

The Problemist, 1933

2R5/3NK2b/P4p2/2p5/Pqk1P3/1p2Q3/3B4/1n6

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sb6#
    • 1...Qxa4
      • 2.Rxc5#
    • 1...Qb6
      • 2.Sxb6#
    • 1...Qb7
      • 2.Rxc5#
    • 1...Qb8
      • 2.Rxc5#
    • 1...Bxe4
      • 2.Qxe4#
    • 1...f5
      • 2.Se5#
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Qd3#
      • 1...Qxc5+
        • 2.Rxc5#
      • 1...Qb7+
        • 2.Sxb7#
      • 1...Qxd2
        • 2.Sd3#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Qc3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD::S(F)
    • Q(c);N_GUARD,XP(C)::R1(H),XP(e)
    • Q(c);N_GUARD::S(F),XQ(c)
    • Q(c);N_GUARD,P_PINS(F)::R1(H),XP(e)
    • Q(c);N_GUARD::R1(H),XP(e)
    • B(g);OGATE,XP(D)::QAR2(B),XB(g)
    • P(f);N_GUARD::S(F)
  • Actual
    • S(F);P_SPINS(F),XP(e)
    • Threat
      • QAB1(B)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::R1(H),XQ(c)
      • Q(c);CHECK,N_PINS(F)::R(H)+S(F),XQ(c)
      • Q(c);N_PINS(F),XB(A)::R(H)+S(F)
      • B(g);OGATE,XP(D)::QAR2(B),XB(g)
      • Q(c);N_PINS(F)::R(H)+S(F)
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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).