MESON Chess Problem Database

Problem Display
PID: 206979 (8/2N5/8/p3R3/1b1k4/3p1K2/8/4Q3 w - - 0 1)

Schmitt, EA

Shakhmatny Listok, 1859

8/2N5/8/p3R3/1b1k4/3p1K2/8/4Q3

#2

4 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Qe4#
    • 1...Bc5
      • 2.Re4#
  • Tries
    • 1.Qxb4+?
      • 1...Kxe5
        • 2.Qf4#
      • 1...axb4!
    • 1.Qh4+?
      • 1...Kxe5
        • 2.Qf4#
      • 1...Kc3!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Re4#
        • 2.Rd5#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Bc3
        • 2.Qf4#
      • 1...d2
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(b);SBLOCK::QAR1(A)
    • B(b);SBLOCK::R1(C)
  • Tries
    • Try
      • Q(A);CHECK,XB(b)
      • Vars
        • K(c);OGATE,S_FLIGHT,XR(C)::QAB1(A)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(C)::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);S_FLIGHT,XR(C)::QAB1(A)
      • B(b);SBLOCK::QAR2(A)
      • P(a);::R1(C)
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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).