MESON Chess Problem Database

Problem Display
PID: 55195 (8/2Q2p2/4p2B/3p1kP1/r4N2/3p3P/r4N1p/1B3R1K w - - 0 1)

Lider, Valentin Viktorovich

3rd Prize, Schach-Echo, 1963

8/2Q2p2/4p2B/3p1kP1/r4N2/3p3P/r4N1p/1B3R1K

#2

9 + 8

3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Bxd3#
    • 1...Ra6
      • 2.Bxd3#
    • 1...Ra7
      • 2.Bxd3#
    • 1...Ra8
      • 2.Bxd3#
    • 1...d4
      • 2.Bxd3#
    • 1...e5
      • 2.Qxf7#
  • Tries
    • 1.S2xd3?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Rxf4
        • 2.Sb2#
      • 1...Re4
        • 2.Qxf7#
      • 1...e5
        • 2.Qxe5#
      • 1...f6
        • 2.Qh7#
      • 1...Re2!
    • 1.Sg4?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Rxf4
        • 2.Bxd3#
      • 1...Re4
        • 2.Qxf7#
      • 1...e5
        • 2.Qxe5#
      • 1...f6
        • 2.Qh7#
      • 1...Re2!
  • Keys
    • 1.S4xd3!
      • threat
        • 2.Qxf7#
      • 1...Kg6
        • 2.Sf4#
      • 1...Rxf2
        • 2.Sb4#
      • 1...Ra7
        • 2.Sb2#
      • 1...f6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::B(A),XP(c)
    • P(e);S_CUTR(d)::B(A),XP(c)
    • P(g);SBLOCK::QAR2(I),XP(h)
  • Tries
    • Try
      • S(D);XP(c)
      • Threat
        • QAR1(I)
      • Vars
        • K(f);S_FLIGHT::QAR1(I)
        • R(d);N_GUARD,P_SPINR(d),XS(F)::B(A)+S(D)
        • R(d);SBLOCK::QAR2(I),XP(h)
        • P(g);::QAR1(I),XP(g)
        • P(h);OGATE::QAB(I)
      • Refutation
        • R(a);
    • Try
      • S(D);
      • Threat
        • QAR1(I)
      • Vars
        • K(f);S_FLIGHT::QAR1(I)
        • R(d);N_GUARD,P_SPINR(d),XS(F)::B(A),XP(c)
        • R(d);N_SPINP(c),SBLOCK::QAR2(I),XP(h)
        • P(g);::QAR1(I),XP(g)
        • P(h);OGATE::QAB(I)
      • Refutation
        • R(a);
  • Actual
    • S(F);XP(c)
    • Threat
      • QAR2(I),XP(h)
    • Vars
      • K(f);S_FLIGHT::B(A)+S(F),DCHECK
      • R(a);N_GUARD,P_SPINR(a),XS(D)::B(A)+S(F)
      • R(d);N_GUARD::B(A)+S(F)
      • P(h);OGATE::QAB(I)
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