MESON Chess Problem Database

Problem Display
PID: 190168 (8/8/2b1qb2/2p1ppp1/4k3/2QR1p2/1p3K2/8 w - - 0 1)

Keeney, Palmer Gunkel

Pittsburgh Gazette-Times, 1913

8/8/2b1qb2/2p1ppp1/4k3/2QR1p2/1p3K2/8

#2

3 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qc8
      • 2.Qc4#
    • 1...Qe7
      • 2.Qc4#
    • 1...Qe8
      • 2.Qc4#
  • Tries
    • 1.Re3+?
      • 1...Kd5
        • 2.Qd3#
      • 1...Kf4!
    • 1.Rd4+?
      • 1...cxd4
        • 2.Qxf3#
      • 1...exd4!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qxf3#
        • 2.Qc4#
      • 1...Kf4
        • 2.Qxf3#
      • 1...Kxd5
        • 2.Qd3#
      • 1...Qxd5
        • 2.Qe3#
      • 1...Bxd5
        • 2.Qe3#
      • 1...Bb5
        • 2.Qxf3#
      • 1...c4
        • 2.Qxf3#
        • 2.Qxc4#
      • 1...f4
        • 2.Qd3#
      • 1...g4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_GUARD::QAR2(B),XQ(i)
    • Q(i);N_GUARD::QAR2(B)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • P(d);SBLOCK,XR(C)::QAB1(B),XP(b)
      • Refutation
        • P(e);XR(C)
  • Actual
    • R(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P-FLIGHT::QAR1(B),XP(b)
      • K(c);S_FLIGHT,XR(C)::QAR2(B)
      • Q(i);SBLOCK,XR(C)::QAR1(B)
      • B(h);SBLOCK,XR(C)::QAR1(B)
      • B(h);::QAB1(B),XP(b)
      • P(f);SBLOCK::QAB1(B)
      • P(g);::QAR2(B)
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).