MESON Chess Problem Database

Problem Display
PID: 176343 (4B1R1/1N2k1P1/1rn1p1nr/q4QKp/3b1P1p/4N3/1B2R3/8 w - - 0 1)

Vukcevich, Milan Radoje

Schach-Echo, 1971

4B1R1/1N2k1P1/1rn1p1nr/q4QKp/3b1P1p/4N3/1B2R3/8

#2

10 + 10

6490 yacpdb 2018
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qd2
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qc3
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qb4
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qa1
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qa2
      • 2.Qf7#
    • 1...Qa3
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qa4
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qd5
      • 2.Sxd5#
    • 1...Qxf5+
      • 2.Sxf5#
    • 1...Qa6
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qa7
      • 2.Sd5#
      • 2.Qf7#
    • 1...Qa8
      • 2.Sd5#
      • 2.Qf7#
    • 1...Bxe3
      • 2.Bf6#
    • 1...Bc5
      • 2.Sd5#
      • 2.Bf6#
      • 2.Qf6#
      • 2.Qf7#
    • 1...Be5
      • 2.Qf7#
    • 1...Bf6+
      • 2.Bxf6#
    • 1...Sce5
      • 2.Qf6#
    • 1...Sge5
      • 2.Qf8#
    • 1...Sf8
      • 2.gxf8Q#
    • 1...exf5
      • 2.Sd5#
      • 2.Sxf5#
    • 1...e5
      • 2.Qd7#
      • 2.Qf6#
      • 2.Qf7#
  • Tries
    • 1.Qc5+?
      • 1...Bxc5
        • 2.Sd5#
        • 2.Sf5#
        • 2.Bf6#
      • 1...Qxc5+!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Sf5#
      • 1...Qxd5+
        • 2.Sxd5#
      • 1...Bf6+
        • 2.Bxf6#
      • 1...Bxe3
        • 2.Bf6#
      • 1...Sf8
        • 2.gxf8Q#
      • 1...Be5
        • 2.Qd7#
      • 1...Sce5
        • 2.Qd8#
      • 1...Sge5
        • 2.Qd6#

Anticipated by 243823(1971)

This anticipates 104414(1995)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_PINQ(E)::QAR1(E)
    • Q(c);N_GUARD::S(C),XQ(c)
    • Q(c);CHECK,XQ(E)::S(C),XQ(c)
    • B(a);OGATE,P_PINP(D),XS(C)::B(A)
    • B(a);N_PINQ(E)::QAR1(E)
    • B(a);CHECK,OGATE::B(A),XB(a)
    • S(f);N_PINQ(E)::QAB1(E)
    • S(h);N_PINQ(E)::QAB1(E)
    • S(h);OGATE::PXS(h)=Q
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • Q(c);CHECK,XQ(E)
  • Actual
    • Q(E);
    • Threat
      • S(C)
    • Vars
      • Q(c);CHECK,XQ(E)::S(C),XQ(c)
      • B(a);CHECK,OGATE::B(A),XB(a)
      • B(a);OGATE,P_PINP(D),XS(C)::B(A)
      • S(h);OGATE::PXS(h)=Q
      • B(a);N_PINQ(E)::QAR1(E)
      • S(f);N_PINQ(E)::QAB1(E)
      • S(h);N_PINQ(E)::QAB1(E)
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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).