MESON Chess Problem Database

Problem Display
PID: 120666 (8/6Kp/2p5/1n2k3/3RnNP1/1N3p2/6R1/2Q5 w - - 0 1)

Meredith, William

Checkmate, 1901

8/6Kp/2p5/1n2k3/3RnNP1/1N3p2/6R1/2Q5

#2

7 + 6

6490 yacpdb 2009
14868 Pirnie Collection 2011
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qc5#
    • 1...Sf2
      • 2.Qc5#
    • 1...Sg3
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sg5
      • 2.Qc5#
    • 1...Sed6
      • 2.Qc5#
    • 1...c5
      • 2.Rd5#
  • Tries
    • 1.Sa5?
      • threat
        • 2.Sxc6#
      • 1...Kxd4
        • 2.Sxc6#
      • 1...Sxd4
        • 2.Sc4#
      • 1...c5
        • 2.Sc6#
        • 2.Rd5#
      • 1...Sa7!
    • 1.Sg6+?
      • 1...Ke6
        • 2.Qc4#
      • 1...hxg6!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sxf3#
      • 1...Kxd4
        • 2.Sxf3#
      • 1...Kxf4
        • 2.Sc4#
      • 1...Sxd2
        • 2.Qc5#
      • 1...Sxd4
        • 2.Sc4#
      • 1...fxg2
        • 2.Sf3#
      • 1...Sg5
        • 2.Qc5#
      • 1...f2
        • 2.Sf3#

Anticipated by 141340(1893), 141339(1900)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::QAR2(A)
    • S(b);N_GUARD::QAR2(A),XS(b)
    • P(e);N_GUARD::R1(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C),XP(e)
      • Vars
        • K(d);S_FLIGHT,XR(D)::S(C),XP(e)
        • S(c);SBLOCK,XR(D)::S(C)
      • Refutation
        • S(c);
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(A)
      • Refutation
        • P(f);XS(E)
  • Actual
    • S(C);
    • Threat
      • S(C),XP(a)
    • Vars
      • K(d);S_FLIGHT,XR(D)::S(C),XP(a)
      • K(d);P_SPINS(b),S_FLIGHT,XS(E)::QAB(A)+S(C)
      • S(b);N_GUARD,XS(C)::QAR2(A)
      • S(c);SBLOCK,XR(D)::S(C)
      • P(a);XR(B)::S(C)
      • S(b);N_GUARD::QAR2(A)
      • P(a);::S(C)
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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).