MESON Chess Problem Database

Problem Display
PID: 198390 (4NB2/8/2B5/1P2q2R/1p1k3P/1p2p3/1Nn5/2RK2Q1 w - - 0 1)

Meschick, AG

Brisbane Courier, 1920

4NB2/8/2B5/1P2q2R/1p1k3P/1p2p3/1Nn5/2RK2Q1

#2

10 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qg7
      • 2.Bxg7#
      • 2.Qxg7#
    • 1...Sa1
      • 2.Rc4#
    • 1...Se1
      • 2.Rc4#
  • Tries
    • 1.Qg4+?
      • 1...Qf4
        • 2.Bg7#
      • 1...Qe4
        • 2.Bg7#
      • 1...Kc3!
    • 1.Qg7?
      • threat
        • 2.Qxe5#
      • 1...Kc3
        • 2.Qxe5#
      • 1...Qxg7
        • 2.Bxg7#
      • 1...Qf6
        • 2.Qxf6#
      • 1...e2+!
  • Keys
    • 1.Bg7!
      • 1...Kc3
        • 2.Bxe5#
      • 1...Kc5
        • 2.Qxe3#
      • 1...Qxg7
        • 2.Qxg7#
      • 1...Qf6
        • 2.Bxf6#
      • 1...Sa1
        • 2.Bxe5#
        • 2.Rc4#
        • 2.Qg4#
      • 1...Se1
        • 2.Bxe5#
        • 2.Rc4#
        • 2.Qg4#
      • 1...Sa3
        • 2.Bxe5#
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATE::R1(A)
  • Tries
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Vars
        • Q(f);P_SPINQ(f)::B(J)
      • Refutation
        • K(e);P_SPINS(a),S_FLIGHT
    • Try
      • Q(C);N_PINP(c),P_PINQ(f)
      • Threat
        • QAB1(C),XQ(f)
      • Vars
        • K(e);P_SPINS(a),S_FLIGHT::QAB(C),XQ(f)
        • Q(f);N_SPINQ(f),OGATE,XQ(C)::B(J),XQ(f)
        • Q(f);OGATEB::QAB(C),XQ(f)
      • Refutation
        • P(c);CHECK
  • Actual
    • B(J);P_PINQ(f)
    • Vars
      • K(e);N_SPINP(c),P_SPINS(a),S_FLIGHT::B(J),XQ(f)
      • K(e);P_SPINS(a),S_FLIGHT::QAB(C),XP(c)
      • Q(f);N_SPINQ(f),OGATE,XB(J)::QAB(C),XQ(f)
      • Q(f);OGATEB::B(J),XQ(f)
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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).