MESON Chess Problem Database

Problem Display
PID: 67367 (8/8/B7/8/Q3K3/8/3p1pR1/4k3 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Die Schwalbe, 2006

8/8/B7/8/Q3K3/8/3p1pR1/4k3

#2

4 + 3

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d1B
      • 2.Qb4#
      • 2.Qa5#
    • 1...f1S
      • 2.Re2#
    • 1...f1R
      • 2.Re2#
  • Tries
    • 1.Be2?
      • threat
        • 2.Qd1#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1S
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Kxe2!
    • 1.Qb5?
      • threat
        • 2.Qf1#
        • 2.Qe2#
      • 1...Kd1
        • 2.Qb1#
      • 1...d1S
        • 2.Qe2#
      • 1...d1B
        • 2.Qb4#
        • 2.Qa5#
      • 1...d1R
        • 2.Qe2#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
        • 2.Qe2#
      • 1...f1B
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
        • 2.Qe2#
      • 1...d1Q!
    • 1.Qa2?
      • 1...Kd1
        • 2.Qb1#
      • 1...d1Q
        • 2.Qxf2#
      • 1...d1S
        • 2.Qe2#
      • 1...d1B
        • 2.Qxf2#
        • 2.Qa5#
      • 1...d1R
        • 2.Qe2#
        • 2.Qxf2#
      • 1...f1Q
        • 2.Qxd2#
      • 1...f1B
        • 2.Qxd2#
      • 1...f1R
        • 2.Qxd2#
      • 1...f1S!
    • 1.Qb4?
      • 1...Kd1
        • 2.Qb1#
      • 1...f1Q
        • 2.Qxd2#
      • 1...f1B
        • 2.Qxd2#
      • 1...f1R
        • 2.Qxd2#
      • 1...f1S!
  • Keys
    • 1.Qc2!
      • 1...d1Q
        • 2.Qxf2#
      • 1...d1S
        • 2.Qe2#
      • 1...d1B
        • 2.Qxf2#
        • 2.Qc3#
      • 1...d1R
        • 2.Qe2#
        • 2.Qxf2#
      • 1...f1Q
        • 2.Qxd2#
      • 1...f1S
        • 2.Re2#
      • 1...f1B
        • 2.Qxd2#
      • 1...f1R
        • 2.Re2#
        • 2.Qxd2#

Anticipated by 133487(1958)

This is a version of 235503

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATE,SBLOCK::R1(A)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);::QAR1(B),XQ(b)
        • P(b);::QAR1(B),XS(b)
        • P(b);::QAR1(B),XB(b)
        • P(b);::QAR1(B),XR(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c),XB(D)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • P(b);::QAR1(B)
        • P(c);::QAR1(B),XQ(c)
        • P(c);::QAR1(B),XB(c)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • P(b);OGATE,SBLOCK::QAB1(B),XP(c)
        • P(b);OGATE::QAR1(B)
        • P(c);::QAB1(B),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(B)
        • P(c);::QAB1(B),XP(b)
      • Refutation
        • P(c);
  • Actual
    • Q(B);
    • Vars
      • P(b);OGATE,SBLOCK::QAB1(B),XP(c)
      • P(b);OGATE::QAR1(B)
      • P(c);::QAB1(B),XP(b)
      • P(c);OGATE,SBLOCK::R1(A)
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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).