MESON Chess Problem Database

Problem Display
PID: 175635 (3K4/8/1N2p2N/2P1k3/1B6/3Pn3/8/6Q1 w - - 0 1)

Anonymous

Philadelphia Times, 1900

3K4/8/1N2p2N/2P1k3/1B6/3Pn3/8/6Q1

#2

7 + 3

3713 Snap 2018
6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Sd7#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Bc3#
      • 1...Sd1
        • 2.Sg4#
        • 2.Sf7#
      • 1...Sc2
        • 2.Sg4#
        • 2.Sf7#
      • 1...Sd5
        • 2.Sc4#
        • 2.Sd7#
        • 2.Sg4#
        • 2.Sf7#
      • 1...Sf5
        • 2.Sg4#
      • 1...Kd4!
    • 1.Qg3+?
      • 1...Kf6
        • 2.Sd7#
      • 1...Kd4!
    • 1.Qg5+?
      • 1...Sf5
        • 2.Bc3#
      • 1...Kd4!
  • Keys
    • 1.Bd2!
      • 1...Kd4
        • 2.Qxe3#
      • 1...Kf4
        • 2.Qxe3#
      • 1...Kf6
        • 2.Sd7#
      • 1...Sd1
        • 2.Qg7#
      • 1...Sf1
        • 2.Qg7#
      • 1...Sc2
        • 2.Qg7#
      • 1...Sg2
        • 2.Qa1#
      • 1...Sc4
        • 2.Qg7#
      • 1...Sg4
        • 2.Qa1#
      • 1...Sd5
        • 2.Sd7#
      • 1...Sf5
        • 2.Sg4#

Anticipated by 4692(1887)

This anticipates 189986(1913)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • B(C)
      • Vars
        • S(a);N_GUARD::S(F)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);P_SPINS(a)::B(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::QAB1(A),XS(a)
      • K(b);S_FLIGHT::S(E)
      • S(a);::QAB(A)
      • S(a);SBLOCK::S(E)
      • S(a);N_GUARD,SBLOCK::S(F)
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).