MESON Chess Problem Database

Problem Display
PID: 51732 (1qB3nK/1p3pQ1/1N1P1R1p/r3k2p/p6p/5P2/5B2/3n4 w - - 0 1)

Kennard, Walter Irving

Checkmate, 1904

1qB3nK/1p3pQ1/1N1P1R1p/r3k2p/p6p/5P2/5B2/3n4

#2

8 + 11

5064 100 Years of the American Two-move Chess Problem 1962

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Rf5#
    • 1...Rd5
      • 2.Sc4#
      • 2.Sd7#
  • Tries
    • 1.Rxf7+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Kxd6!
    • 1.Qg3+?
      • 1...Kxf6
        • 2.Qg7#
      • 1...hxg3!
    • 1.Qg4?
      • threat
        • 2.Bd4#
        • 2.Qf5#
        • 2.Qd4#
        • 2.Qf4#
      • 1...Kxf6
        • 2.Sd7#
        • 2.Qg7#
      • 1...Qxd6
        • 2.Rf5#
        • 2.Qf5#
        • 2.Qf4#
      • 1...Qxc8
        • 2.Bd4#
        • 2.Qd4#
        • 2.Qf4#
      • 1...Sxf2
        • 2.Qf4#
      • 1...Sxf6
        • 2.Qd4#
      • 1...Rd5
        • 2.Sd7#
        • 2.Qf5#
        • 2.Qf4#
      • 1...Se3
        • 2.Qf4#
      • 1...Se7
        • 2.Bd4#
        • 2.Qd4#
        • 2.Qf4#
      • 1...hxg4!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Bd4#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Qxd6
        • 2.Rf5#
      • 1...Sxf2
        • 2.Qa1#
      • 1...Sxf6
        • 2.Qh2#
      • 1...Se3
        • 2.Qa1#
      • 1...Rd5
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(j);SBLOCK,XP(D)::QAB(F)+R(E),DCHECK
  • Tries
    • Try
      • R(E);CHECK,XP(i)
      • Vars
        • S(k);N_GUARD,P_PINB(G),P_SPINS(k)::QAB1(F),XS(k)
      • Refutation
        • K(e);S_FLIGHT,XP(D)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(E)::QAB1(F)
      • Refutation
        • P(c);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(4)
      • Vars
        • S(a);XB(A)::QAB1(F)
        • S(k);P_PINB(G),SBLOCK,XR(E)::QAB1(F)
        • S(a);::QAB1(F)
      • Refutation
        • P(f);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • B(A)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(E)::QAB1(F)
      • Q(j);SBLOCK,XP(D)::R1(E)
      • S(a);OGATE,XB(A)::QAB(F)
      • S(k);P_PINB(G),SBLOCK,XR(E)::QAB(F)
      • S(a);OGATE::QAB(F)
      • R(d);SBLOCK::S(C)
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).