MESON Chess Problem Database

Problem Display
PID: 139554 (n2Q4/N1p1n3/1pP1BPp1/1N1Pk1p1/4P1K1/3P4/8/5R2 w - - 0 1)

Lider, Valentin Viktorovich

Probleemblad, 1974

n2Q4/N1p1n3/1pP1BPp1/1N1Pk1p1/4P1K1/3P4/8/5R2

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Qxd5#
    • 1...Sxc6
      • 2.Sxc6#
  • Tries
    • 1.Qe8?
      • 1...Sxd5
        • 2.Bxd5#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...Sc8
        • 2.Bxc8#
      • 1...Sg8
        • 2.Bxg8#
      • 1...Sf5!
    • 1.f7?
      • threat
        • 2.Qh8#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sg8
        • 2.Qxg5#
      • 1...Sf5!
  • Keys
    • 1.Re1!
      • 1...Kxf6
        • 2.Qh8#
      • 1...Sxd5
        • 2.exd5#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...Sc8
        • 2.d4#
      • 1...Sf5
        • 2.exf5#
      • 1...Sg8
        • 2.d4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE,XP(F)::QAR1(K),XS(f)
    • S(f);XP(G)::S(J),XS(f)
  • Tries
    • Try
      • Q(K);
      • Vars
        • S(f);OGATE,XP(F)::QAR(K)+B(H),XS(f)
        • S(f);XP(G)::S(J),XS(f)
        • S(f);OGATEB::QAR(K)+B(H),XS(f)
      • Refutation
        • S(f);
    • Try
      • P(I);
      • Threat
        • QAB(K)
      • Vars
        • S(f);OGATE,XP(F)::QAR1(K),XS(f)
        • S(f);OGATE::QAR2(K),XP(b)
      • Refutation
        • S(f);
  • Actual
    • R(A);
    • Vars
      • K(a);OGATEB,P_SPINS(f),S_FLIGHT,XP(I)::QAB(K)
      • S(f);OGATE,XP(F)::R(A)+P(C),XS(f)
      • S(f);XP(G)::S(J),XS(f)
      • S(f);::P(B)
      • S(f);OGATE::R(A)+P(C),XS(f)
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