MESON Chess Problem Database

Problem Display
PID: 202415 (4B3/bNp5/1p6/8/2kp4/K4Q2/2p5/n1r5 w - - 0 1)

Walton, FW

HM., Manchester Evening News, 1922

(First published on Sat Dec 2 1922)

4B3/bNp5/1p6/8/2kp4/K4Q2/2p5/n1r5

#2

4 + 8

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qxb3#
    • 1...b5
      • 2.Bf7#
    • 1...c5
      • 2.Sd6#
  • Tries
    • 1.Ka4?
      • threat
        • 2.Bb5#
        • 2.Bf7#
      • 1...b5+
        • 2.Bxb5#
      • 1...Rb1
        • 2.Bf7#
      • 1...Re1
        • 2.Bb5#
      • 1...c6
        • 2.Bf7#
      • 1...d3!
    • 1.Sa5+?
      • 1...Kc5
        • 2.Qc6#
      • 1...bxa5!
    • 1.Sd6+?
      • 1...Kc5
        • 2.Qc6#
      • 1...cxd6!
  • Keys
    • 1.Bg6!
      • threat
        • 2.Qc6#
      • 1...Kb5
        • 2.Bd3#
      • 1...d3
        • 2.Qxd3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...b5
        • 2.Bf7#
      • 1...c5
        • 2.Sd6#
      • 1...c6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B),XS(a)
    • P(f);SBLOCK::B(D)
    • P(h);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(f);CHECK::B(D),XP(f)
        • R(b);::B(D)
        • P(h);::B(D)
      • Refutation
        • P(e);
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • P(f);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(B)
      • Refutation
        • P(h);XS(C)
  • Actual
    • B(D);
    • Threat
      • QAR2(B)
    • Vars
      • K(d);S_FLIGHT::B(D)
      • P(e);::QAB1(B),XP(e)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • P(f);SBLOCK::B(D)
      • P(h);N_GUARD,SBLOCK::S(C)
      • P(h);::QAR2(B),XP(h)
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).