MESON Chess Problem Database

Problem Display
PID: 138933 (k7/5QK1/3n1pb1/1R1p1r2/5p2/8/1p6/4R3 w - - 0 1)

Umnov, Evgeny Ivanovich

Shakhmaty v SSSR, 1945

k7/5QK1/3n1pb1/1R1p1r2/5p2/8/1p6/4R3

#2

4 + 8

23 Die Schwalbe 1965

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Re8#
      • 2.Qb7#
    • 1...Se4
      • 2.Qb7#
    • 1...Sxb5
      • 2.Re8#
    • 1...Sb7
      • 2.Qxb7#
    • 1...Sc8
      • 2.Qb7#
    • 1...Se8+
      • 2.Rxe8#
    • 1...d4
      • 2.Qa2#
  • Tries
    • 1.Re8+?
      • 1...Sc8
        • 2.Rxc8#
        • 2.Qb7#
      • 1...Sxe8+!
    • 1.Rxb2?
      • threat
        • 2.Ra1#
      • 1...Se8+
        • 2.Rxe8#
      • 1...Sb5
        • 2.Re8#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc4
        • 2.Re8#
        • 2.Qb7#
      • 1...Sc8
        • 2.Qb7#
      • 1...d4!
    • 1.Qxd5+?
      • 1...Ka7
        • 2.Qa2#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Rxd5!
  • Keys
    • 1.Re4!
      • threat
        • 2.Ra4#
      • 1...Se8+
        • 2.Rxe8#
      • 1...Sxe4
        • 2.Qb7#
      • 1...Sxb5
        • 2.Re8#
      • 1...dxe4
        • 2.Qa2#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc4
        • 2.Re8#
        • 2.Qb7#
      • 1...Sc8
        • 2.Qb7#
      • 1...d4
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAB1(C)
    • S(e);N_GUARD,XR(B)::R(A)
    • S(e);N_GUARD::QAB1(C),XS(e)
    • S(e);CHECK,N_GUARD::R(A),XS(e)
    • P(c);OGATE::QAR(C)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • S(e);CHECK,XR(A)
    • Try
      • R(B);XP(a)
      • Threat
        • R(A)
      • Vars
        • S(e);CHECK,N_GUARD::R(A),XS(e)
        • S(e);N_GUARD::R(A)
        • S(e);N_GUARD::QAB1(C),XS(e)
        • S(e);N_GUARD::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • K(h);P-FLIGHT::QAR(C)
        • S(e);N_GUARD,P_SPINS(e)::QAB1(C),XS(e)
      • Refutation
        • R(d);XQ(C)
  • Actual
    • R(A);
    • Threat
      • R(A)
    • Vars
      • S(e);CHECK,N_GUARD::R(A),XS(e)
      • S(e);N_GUARD,XR(A)::QAB1(C)
      • S(e);N_GUARD,XR(B)::R(A)
      • P(c);OGATE,XR(A)::QAR(C)
      • S(e);N_GUARD::QAB1(C),XS(e)
      • S(e);N_GUARD::QAB1(C)
      • P(c);OGATE::QAR(C)
HTML5 logo

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).