MESON Chess Problem Database

Problem Display
PID: 228853 (2R1N1bK/p2B4/r2p1RN1/p2k2pp/3b3q/2p2P2/4rp2/n2Q4 w - - 0 1)

Levman, Semyon Semyonovich

1st Prize, Shakhmaty, 1926

2R1N1bK/p2B4/r2p1RN1/p2k2pp/3b3q/2p2P2/4rp2/n2Q4

#2

8 + 14

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qxb3#
  • Tries
    • 1.Se7+?
      • 1...Ke5
        • 2.Rf5#
      • 1...Rxe7!
    • 1.Rxc3?
      • threat
        • 2.Sc7#
      • 1...Rc6
        • 2.Bxc6#
      • 1...Rxe8!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc4#
      • 1...Bxf6+
        • 2.Sxf6#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Be3
        • 2.Rf5#
      • 1...Bc5
        • 2.Sc7#
      • 1...Be5
        • 2.Se7#
      • 1...Bb6
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(h);N_PINR(C),N_SPINB(e),P-FLIGHT::R1(C)
      • Refutation
        • R(b);XS(D)
    • Try
      • R(F);XP(d)
      • Threat
        • S(G)
      • Vars
        • R(k);N_GUARD::B(E),XR(k)
      • Refutation
        • R(b);XS(G)
  • Actual
    • Q(A);N_PINB(e)
    • Threat
      • QAB1(A)
    • Vars
      • B(e);CHECK,XR(C)::S(G),XB(e)
      • R(k);N_GUARD::QAB1(A),XR(k)
      • B(e);N_PINR(C)::R(C)
      • B(e);N_PINR(C),SBLOCK::S(G)
      • B(e);SBLOCK,S_CUTR(b)::S(D)
      • B(e);N_PINR(C)::R1(C),XP(l)
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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).