MESON Chess Problem Database

Problem Display
PID: 154342 (2Rr4/1pB2B1p/5p2/Q2p3K/1Nk3PR/2p2q2/2P5/8 w - - 0 1)

McWilliam, Robert C

Evening News, 1955

(First published on Tue Mar 15 1955)

2Rr4/1pB2B1p/5p2/Q2p3K/1Nk3PR/2p2q2/2P5/8

#2

9 + 8

15393 McWilliam Scrapbook 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4+
      • 2.Rxg4#
    • 1...Qf5+
      • 2.gxf5#
  • Tries
    • 1.Sa2?
      • threat
        • 2.Qb4#
      • 1...Qxg4+
        • 2.Rxg4#
      • 1...Qf5+
        • 2.gxf5#
      • 1...Kd4!
    • 1.Sc6?
      • threat
        • 2.Qb4#
      • 1...Qxg4+
        • 2.Rxg4#
      • 1...Qf5+
        • 2.gxf5#
      • 1...bxc6!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Qb4#
      • 1...Qxg4+
        • 2.Rxg4#
      • 1...Qxd5+
        • 2.g5#
      • 1...Qf5+
        • 2.gxf5#
      • 1...Rxd5+
        • 2.Be5#
      • 1...Kd4
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::R(D),XQ(b)
    • Q(b);CHECK,N_PINP(C)::R(D)+P(C),XQ(b)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(E)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::R(D),XQ(b)
        • Q(b);CHECK,N_PINP(C)::R(D)+P(C),XQ(b)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT
    • Try
      • S(B);
      • Threat
        • QAR1(E)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::R(D),XQ(b)
        • Q(b);CHECK,N_PINP(C)::R(D)+P(C),XQ(b)
      • Refutation
        • P(f);XS(B)
  • Actual
    • S(B);XP(d)
    • Threat
      • QAR1(E)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::R(D),XQ(b)
      • Q(b);CHECK,N_PINP(C),P_SPINQ(b),XS(B)::R(D)+P(C)
      • Q(b);CHECK,N_PINP(C)::R(D)+P(C),XQ(b)
      • R(h);CHECK,N_GUARD,P_SPINR(h),XS(B)::R(I)+B(G)
      • K(c);P-FLIGHT::QAR2(E)
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).