MESON Chess Problem Database

Problem Display
PID: 77236 (8/2N5/1K1prQRB/1p3p2/3pk3/1q2b3/b3R2n/4N3 w - - 0 1)

Loshinski, Lev Ilich

Umnov, Evgeny Ivanovich

3rd Prize, Abastumansky Shakhmaty Bureau, 1930

8/2N5/1K1prQRB/1p3p2/3pk3/1q2b3/b3R2n/4N3

#2

7 + 10

5314 Grossmeister Shakhmatnoi Kompozitsii 1980

SOLUTION

  • SOUND
  • Sets
    • 1...d3+
      • 2.Rxe3#
    • 1...f4
      • 2.Qxf4#
    • 1...d5+
      • 2.Qxe6#
  • Tries
    • 1.Rg4+?
      • 1...fxg4
        • 2.Qf4#
      • 1...f4
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Sxg4!
    • 1.Qh4+?
      • 1...Ke5
        • 2.Qf4#
      • 1...f4
        • 2.Qxf4#
      • 1...Sg4!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qf4#
      • 1...d3+
        • 2.Qxe3#
      • 1...d5+
        • 2.Rxe6#
      • 1...Ke5
        • 2.Qf4#
      • 1...f4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(e);CHECK,N_GUARD,S_CUTQ(c)::R1(B),XB(d)
    • P(h);OGATE::QAR1(D),XP(h)
    • P(i);CHECK,S_CUTQ(c)::QAR2(D),XR(j)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • P(h);OGATE,XR(E)::QAR1(D)
      • Refutation
        • S(b);XR(E)
    • Try
      • Q(D);CHECK
      • Vars
        • K(f);P-FLIGHT::QAB1(D)
        • P(h);P_SPINP(h)::QAR1(D),XP(h)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • P(e);CHECK,N_GUARD,S_CUTQ(c)::QAR1(D),XB(d)
      • P(i);CHECK,S_CUTQ(c)::R(E),XR(j)
      • K(f);P-FLIGHT,P_SPINP(h)::QAB1(D)
      • P(h);::QAR1(D),XP(h)
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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).