MESON Chess Problem Database

Problem Display
PID: 214755 (8/4K3/4N2p/3pk3/4p1P1/5n2/6QR/b6n w - - 0 1)

Wheeler, Charles Henry

Detroit Free Press, 1877

8/4K3/4N2p/3pk3/4p1P1/5n2/6QR/b6n

#2

5 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
    • 1...Se1
      • 2.Rh5#
    • 1...Sg1
      • 2.Rh5#
    • 1...Sd2
      • 2.Rh5#
  • Tries
    • 1.Qxf3?
      • threat
        • 2.Rh5#
        • 2.Qf4#
        • 2.Qf5#
        • 2.Qf6#
      • 1...d4
        • 2.Rh5#
        • 2.Qf5#
      • 1...Sg3
        • 2.Qxg3#
        • 2.Qf4#
        • 2.Qf6#
      • 1...e3
        • 2.Rh5#
        • 2.Qxe3#
        • 2.Qf4#
        • 2.Qf5#
      • 1...h5
        • 2.Rxh5#
        • 2.Qf4#
        • 2.Qf5#
        • 2.Qf6#
      • 1...exf3!
    • 1.Qb2+?
      • 1...Sd4
        • 2.Rh5#
        • 2.Qb8#
      • 1...d4
        • 2.Qb5#
      • 1...Bxb2!
    • 1.Qc2?
      • threat
        • 2.Qc7#
      • 1...d4
        • 2.Qc5#
      • 1...e3
        • 2.Qf5#
      • 1...Bc3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qf4#
      • 1...Sxd2
        • 2.Rh5#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::QAB(A)
    • S(b);N_GUARD::QAB(A),XS(b)
    • S(c);N_GUARD::R(B)
  • Tries
    • Try
      • Q(A);XS(c)
      • Threat
        • DUALS(4)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);OGATEB,P_SPINP(e)::QAR(A)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(e);OGATEB::QAR2(A)
        • P(d);OGATE::QAR1(A)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • S(c);N_GUARD,XQ(A)::R(B)
      • P(d);OGATEB::QAR2(A),XP(d)
      • P(e);OGATEB::QAR(A)
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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).