MESON Chess Problem Database

Problem Display
PID: 195162 (8/B7/8/2p5/7K/8/4P1p1/Q4B1k w - - 0 1)

Barnett, Bernard

Pittsburgh Gazette-Times, 1918

8/B7/8/2p5/7K/8/4P1p1/Q4B1k

#2

5 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Bxg2+?
      • 1...Kh2
        • 2.Qh1#
      • 1...Kxg2!
  • Keys
    • 1.Kg3!
      • threat
        • 2.Bxg2#
      • 1...gxf1S+
        • 2.Qxf1#
      • 1...g1Q+
        • 2.Bg2#
      • 1...g1R+
        • 2.Bg2#
      • 1...Kg1
        • 2.Bxg2#
      • 1...gxf1Q
        • 2.Qxf1#
      • 1...gxf1B
        • 2.Qxf1#
      • 1...gxf1R
        • 2.Qxf1#
      • 1...g1S
        • 2.Bg2#
      • 1...g1B
        • 2.Bg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XB(B)
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • QAR(A)+B(B),DCHECK,XP(b)
    • Vars
      • P(b);CHECK,OGATE,P_SPINS(b),XB(B)::QAR2(A),XS(b)
      • P(b);CHECK::B(B)
      • K(a);P-FLIGHT,P_SPINP(c)::QAR(A)+B(B),XP(b)
      • P(b);OGATE,P_SPINQ(b),XB(B)::QAR2(A),XQ(b)
      • P(b);OGATE,P_SPINB(b),XB(B)::QAR2(A),XB(b)
      • P(b);OGATE,P_SPINR(b),XB(B)::QAR2(A),XR(b)
      • P(b);::B(B)
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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).