MESON Chess Problem Database

Problem Display
PID: 225038 (8/2p5/1b6/1P1Q4/k1K5/1R6/8/8 w - - 0 1)

Sackheim, B

Di jidise stime, 1928

8/2p5/1b6/1P1Q4/k1K5/1R6/8/8

#2

4 + 3

9939 64 Shakhmatnoe obozrenie 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Ra3#
  • Tries
    • 1.Qa8+?
      • 1...Ba7
        • 2.Qxa7#
      • 1...Ba5!
    • 1.Qd2?
      • threat
        • 2.Qb4#
        • 2.Qa2#
      • 1...Ba5
        • 2.Qa2#
      • 1...c5
        • 2.Qa2#
      • 1...Bc5!
    • 1.Qd3?
      • threat
        • 2.Ra3#
      • 1...Ka5
        • 2.Ra3#
      • 1...Bc5!
    • 1.Qc5?
      • threat
        • 2.Ra3#
        • 2.Qa3#
        • 2.Qb4#
      • 1...Ka5
        • 2.Ra3#
        • 2.Qa3#
        • 2.Qb4#
      • 1...Ba5
        • 2.Ra3#
        • 2.Qa3#
      • 1...Bxc5!
  • Keys
    • 1.Qc6!
      • 1...Ka5
        • 2.Ra3#
      • 1...Bg1
        • 2.Qa6#
      • 1...Bf2
        • 2.Qa6#
      • 1...Be3
        • 2.Qa6#
      • 1...Bd4
        • 2.Qa6#
      • 1...Ba5
        • 2.b6#
      • 1...Bc5
        • 2.Qa6#
      • 1...Ba7
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::R(A)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR(D),XB(b)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);SBLOCK::QAR2(D)
        • P(c);::QAR2(D)
      • Refutation
        • B(b);
    • Try
      • Q(D);
      • Threat
        • R1(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • B(b);
    • Try
      • Q(D);
      • Threat
        • DUALS(3)
      • Refutation
        • B(b);XQ(D)
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT::R(A)
      • B(b);OGATE::QAR2(D)
      • B(b);OGATE,SBLOCK::QAB(D)+P(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).