MESON Chess Problem Database

Problem Display
PID: 110276 (4Kn1B/6rn/R1P1Pk2/1P2pPp1/3N2P1/1P3R2/1QP1B3/8 w - - 0 1)

Lider, Valentin Viktorovich

CSTV, 1973

4Kn1B/6rn/R1P1Pk2/1P2pPp1/3N2P1/1P3R2/1QP1B3/8

#2

14 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.Qxd4#
  • Tries
    • 1.Bd3?
      • 1...Sxe6
        • 2.fxe6#
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Se2#
      • 1...Sg6
        • 2.fxg6#
      • 1...Sd7!
    • 1.Rh3?
      • 1...Sxe6
        • 2.Rh6#
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Sf3#
      • 1...Sd7
        • 2.Rh6#
      • 1...Sg6!
    • 1.Ra7?
      • threat
        • 2.Bxg7#
        • 2.Rf7#
      • 1...Sxe6
        • 2.Rf7#
      • 1...exd4
        • 2.Bxg7#
        • 2.Qxd4#
      • 1...e4
        • 2.Bxg7#
      • 1...Sd7!
    • 1.e7?
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Se6#
      • 1...Sg6
        • 2.c7#
      • 1...Sd7
        • 2.cxd7#
      • 1...Se6!
  • Keys
    • 1.c7!
      • 1...Sxe6
        • 2.Rxe6#
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Sc6#
      • 1...Sg6
        • 2.e7#
      • 1...Sd7
        • 2.exd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE,P_SPINP(a),XS(F)::QAB(A),XP(a)
  • Tries
    • Try
      • B(C);
      • Vars
        • S(f);OGATE,XP(L)::R(E)+P(I),XS(f)
        • P(a);OGATE,P_SPINP(a),XS(F)::QAB(A),XP(a)
        • P(a);::QAB(A)+S(F)
        • S(f);OGATE::R(E)+P(I),XS(f)
      • Refutation
        • S(f);
    • Try
      • R(E);
      • Vars
        • S(f);N_GUARD,XP(L)::R(E)
        • P(a);OGATE,P_SPINP(a),XS(F)::QAB(A),XP(a)
        • P(a);::QAB(A)+S(F)
        • S(f);N_GUARD::R(E)
      • Refutation
        • S(f);
    • Try
      • R(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);XP(L)::R1(J)
        • P(a);::B(N),XR(d)
      • Refutation
        • S(f);
    • Try
      • P(L);
      • Vars
        • P(a);OGATE,P_SPINP(a),XS(F)::QAB(A),XP(a)
        • P(a);::QAB(A)+S(F)
        • S(f);N_GUARD::R(J)+P(K)
        • S(f);OGATE::R(J)+P(K),XS(f)
      • Refutation
        • S(f);
  • Actual
    • P(K);
    • Vars
      • S(f);OGATE,P_SPINS(f),XP(L)::R1(J),XS(f)
      • P(a);OGATE,P_SPINP(a),XS(F)::QAB(A),XP(a)
      • P(a);::QAB(A)+S(F)
      • S(f);N_GUARD::R(J)+P(L)
      • S(f);OGATE::R(J)+P(L),XS(f)
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