MESON Chess Problem Database

Problem Display
PID: 168173 (2B2R2/KQ1n3r/1p2rNp1/1R2BkPp/5P2/8/8/1b6 w - - 0 1)

Loshinski, Lev Ilich

Umnov, Evgeny Ivanovich

Smena, 1931

2B2R2/KQ1n3r/1p2rNp1/1R2BkPp/5P2/8/8/1b6

#2

9 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba2
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Sb8
      • 2.Bd6#
      • 2.Bc7#
      • 2.Bxb8#
    • 1...Sxf8
      • 2.Bd6#
      • 2.Bc7#
      • 2.Bb8#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qh3#
      • 1...Sc5+
        • 2.Sxh7#
      • 1...Sxe5+
        • 2.Sxh7#
      • 1...Sxf6+
        • 2.Bc7#
      • 1...Sb8+
        • 2.Sxh7#
        • 2.Bc7#
      • 1...Sxf8+
        • 2.Bc7#
      • 1...Rxf6
        • 2.Rxf6#
      • 1...Rxe5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qh3#
      • 1...Sc5+
        • 2.Sxh7#
      • 1...Sxe5+
        • 2.Sxh7#
      • 1...Sxf6+
        • 2.Bc7#
      • 1...Sb8+
        • 2.Sxh7#
        • 2.Bc7#
      • 1...Sxf8+
        • 2.Bc7#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Rxf6
        • 2.Rxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB1(G)
    • B(a);N_GUARD::QAB1(G),XB(a)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • S(g);CHECK,N_GUARD,P_SPINR(e)::R(I)+S(E),XR(h)
        • S(g);CHECK,N_GUARD,P_SPINR(e),P_SPINS(g),XB(C)::R(I)+S(E),XR(h)
        • S(g);CHECK,N_GUARD,P_SPINR(e),P_SPINS(g),XS(E)::R(B)+B(C)
        • S(g);CHECK,N_GUARD,P_SPINR(e),XR(I)::R(B)+B(C)
        • R(e);OGATE,P_SPINR(e),P_SPINS(g),XS(E)::R1(I),XR(e)
      • Refutation
        • R(e);P_SPINR(e),P_SPINS(g),XB(C)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • S(g);CHECK,N_GUARD,P_SPINR(e)::R(I)+S(E),XR(h)
      • S(g);CHECK,N_GUARD,P_SPINR(e),P_SPINS(g),XB(C)::R(I)+S(E),XR(h)
      • S(g);CHECK,N_GUARD,P_SPINR(e),P_SPINS(g),XS(E)::R(B)+B(C)
      • S(g);CHECK,N_GUARD,P_SPINR(e),XR(I)::R(B)+B(C)
      • R(e);OGATE,P_SPINR(e),P_SPINS(g),XB(C)::R1(B),XR(e)
      • R(e);OGATE,P_SPINR(e),P_SPINS(g),XS(E)::R1(I),XR(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).