MESON Chess Problem Database

Problem Display
PID: 24561 (b4K2/3B2P1/3p1p2/3kP3/2p3r1/b2NB1NR/Q2R4/5r2 w - - 0 1)

Loshinski, Lev Ilich

Umnov, Evgeny Ivanovich

3rd Prize, Swiat Szachowy, 1930

b4K2/3B2P1/3p1p2/3kP3/2p3r1/b2NB1NR/Q2R4/5r2

#2

10 + 8

35 L'Italia Scacchistica 1930
3098 FIDE Album (1914-1944) (I) 1971
5314 Grossmeister Shakhmatnoi Kompozitsii 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.g8Q#
      • 2.g8B#
    • 1...Re4
      • 2.g8Q#
      • 2.g8B#
    • 1...Rf4
      • 2.g8Q#
      • 2.g8B#
    • 1...Rh4
      • 2.g8Q#
      • 2.g8B#
    • 1...Bc1
      • 2.Qa5#
      • 2.Qxa8#
    • 1...Bb2
      • 2.Qa5#
      • 2.Qxa8#
    • 1...Bb4
      • 2.Qxa8#
    • 1...Bc5
      • 2.Qxa8#
    • 1...dxe5+
      • 2.Sb4#
    • 1...fxe5+
      • 2.Sf4#
  • Tries
    • 1.Sf2+?
      • 1...Kxe5
        • 2.Sxg4#
      • 1...Rd4!
    • 1.Qxc4+?
      • 1...Rxc4
        • 2.g8Q#
        • 2.g8B#
      • 1...Kxc4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc3#
      • 1...dxe5+
        • 2.Sdc5#
      • 1...fxe5+
        • 2.Sdf2#
      • 1...Kxe4
        • 2.Qxc4#
      • 1...Rxe4
        • 2.g8Q#
        • 2.g8B#
      • 1...Rc1
        • 2.Sxf6#
      • 1...Bb2
        • 2.Qxa8#
      • 1...Bb4
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(d);N_GUARD::P=Q
    • B(b);OGATE::QAB(A),XB(h)
    • P(f);CHECK,SBLOCK,XP(G)::R(B)+S(C),DCHECK
    • P(g);CHECK,SBLOCK,XP(G)::R(B)+S(C),DCHECK
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);N_SPINP(c),P-FLIGHT,XP(G)::S(C),XR(d)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • R(d);SBLOCK,XQ(A)::P=Q
      • Refutation
        • K(e);S_FLIGHT,XQ(A)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • P(f);CHECK,SBLOCK,XP(G)::R(B)+S(C)
      • P(g);CHECK,SBLOCK,XP(G)::R(B)+S(C)
      • K(e);N_SPINP(c),S_FLIGHT,XS(E)::QAR2(A),XP(c)
      • R(d);N_GUARD,SBLOCK,XS(E)::P=Q
      • R(a);N_GUARD::S(E),XP(g)
      • B(b);OGATE::QAB(A),XB(h)
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Developed and maintained by Brian Stephenson.
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