MESON Chess Problem Database

Problem Display
PID: 16456 (K7/NP1R3P/p6R/4kp2/1B2Pr2/3p4/3P1nbN/b1nQq1r1 w - - 0 1)

Loshinski, Lev Ilich

1st Prize, Sverdlovsk Sports Committee, 1940

K7/NP1R3P/p6R/4kp2/1B2Pr2/3p4/3P1nbN/b1nQq1r1

#2

11 + 11

3098 FIDE Album (1914-1944) (I) 1971
259 Thema Danicum 1977
56 The Problemist 2006
136 Problem Observer 2011
17121 Encyclopedia of Chess Problems (Velimirovic/Valtonen) 2012
133 The Problemist Supplement 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.h8Q#
      • 2.h8B#
    • 1...Rxe4
      • 2.b8Q#
      • 2.b8B#
    • 1...Bd4
      • 2.Re7#
    • 1...Sxe4
      • 2.Sc6#
  • Tries
    • 1.Bc3+?
      • 1...Kxe4
        • 2.Re6#
        • 2.Qa4#
      • 1...Bxc3!
    • 1.Bd6+?
      • 1...Kd4
        • 2.Qa4#
      • 1...Kxe4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Bd6#
      • 1...Kxe4
        • 2.Bc3#
      • 1...Qxe4
        • 2.h8Q#
        • 2.h8B#
      • 1...Rxe4
        • 2.b8Q#
        • 2.b8B#
      • 1...Bxe4
        • 2.Qxa1#
      • 1...Sxe4
        • 2.Sc6#
      • 1...fxe4
        • 2.Qa5#
      • 1...Bd4
        • 2.Re7#

There are these versions: 147373

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(c);P_PINP(H),SBLOCK,XP(E)::P=Q
    • R(h);SBLOCK,XP(E)::P=Q
    • B(a);SBLOCK::R(I)
    • S(e);SBLOCK,XP(E)::S(G)
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • B(a);XB(D)
    • Try
      • B(D);CHECK
      • Vars
        • K(i);S_FLIGHT::QAR(A)
      • Refutation
        • K(i);P-FLIGHT,XP(E)
  • Actual
    • Q(A);
    • Threat
      • B(D)
    • Vars
      • K(i);P-FLIGHT,XP(E)::QAR(A)+B(D)
      • Q(c);P_PINP(H),SBLOCK,XP(E)::P=Q
      • R(h);SBLOCK,XP(E)::P=Q
      • B(f);P_PINP(H),SBLOCK,XP(E)::QAB(A),XB(a)
      • S(e);SBLOCK,XP(E)::S(G)
      • P(j);SBLOCK,XP(E)::QAR(A)
      • B(a);SBLOCK::R(I)
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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).