MESON Chess Problem Database

Problem Display
PID: 202453 (8/8/2p1p1K1/3p4/1B1kp3/3P4/2P5/2Q5 w - - 0 1)

Gordian, Mark Filippovich

Shakhmaty, 1923

8/8/2p1p1K1/3p4/1B1kp3/3P4/2P5/2Q5

#2

5 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...exd3
      • 2.Qf4#
    • 1...e3
      • 2.Qb2#
      • 2.Qa1#
  • Tries
    • 1.Qe3+?
      • 1...Ke5
        • 2.d4#
      • 1...Kxe3!
    • 1.Qg1+?
      • 1...e3
        • 2.Qa1#
      • 1...Ke5!
    • 1.c3+?
      • 1...Ke5
        • 2.Qg5#
        • 2.d4#
      • 1...Kxd3!
  • Keys
    • 1.Qd2!
      • 1...Ke5
        • 2.d4#
      • 1...exd3
        • 2.Qf4#
      • 1...c5
        • 2.Bc3#
      • 1...e3
        • 2.Qc3#
      • 1...e5
        • 2.c3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,XP(C)::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P_SPINP(b),S_FLIGHT::P(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);P_SPINP(b),SBLOCK::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • Q(A);
    • Vars
      • K(a);OGATE,S_FLIGHT::P(C)
      • P(b);OGATEB,P_SPINP(b),XP(C)::QAR2(A)
      • P(d);SBLOCK::B(D)
      • P(b);SBLOCK::QAB1(A)
      • P(e);SBLOCK::P(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).