MESON Chess Problem Database

Problem Display
PID: 205534 (8/8/8/7p/2P4K/5k2/3Q4/2B4b w - - 0 1)

Schonberger, Tibor

L'Echiquier Marseillais, 1925

8/8/8/7p/2P4K/5k2/3Q4/2B4b

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qd5#
    • 1...Bg2
      • 2.Qe3#
  • Tries
    • 1.Kxh5?
      • 1...Ke4
        • 2.Qd5#
      • 1...Bg2
        • 2.Qe3#
      • 1...Kg3!
    • 1.Qe1?
      • 1...Bg2
        • 2.Qe3#
      • 1...Kg2!
    • 1.c5?
      • 1...Bg2
        • 2.Qe3#
      • 1...Ke4!
  • Keys
    • 1.Kh3!
      • threat
        • 2.Qe3#
      • 1...Bg2+
        • 2.Qxg2#
      • 1...Ke4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(B)
    • B(a);SBLOCK::QAR1(B)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(c)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • B(a);SBLOCK::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • B(a);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(C);
      • Vars
        • B(a);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAR1(B)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(B),XB(a)
      • K(b);S_FLIGHT::QAB1(B)
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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).