MESON Chess Problem Database

Problem Display
PID: 180343 (3N3b/3B1Rnp/2P1PPkr/6Np/4K2B/5PpP/6QP/8 w - - 0 1)

Lider, Valentin Viktorovich

6th Comm., Sredba na Solidarnosta, 1976

3N3b/3B1Rnp/2P1PPkr/6Np/4K2B/5PpP/6QP/8

#2

13 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Ke5?
      • 1...Sxe6
        • 2.Qc2#
      • 1...gxh2
        • 2.Se4#
      • 1...Se8
        • 2.Qc2#
      • 1...Sf5!
    • 1.Rxg7+?
      • 1...Kxf6
        • 2.Qb2#
      • 1...Bxg7!
    • 1.Qxg3?
      • 1...Sxe6
        • 2.Sgxe6#
      • 1...Se8
        • 2.Sxh7#
      • 1...Sf5!
    • 1.f4?
      • 1...Sxe6
        • 2.f5#
      • 1...gxh2
        • 2.Sf3#
      • 1...Se8
        • 2.f5#
      • 1...Sf5!
    • 1.e7?
      • 1...gxh2
        • 2.Sge6#
      • 1...Sf5
        • 2.Bxf5#
      • 1...Se8
        • 2.Bf5#
      • 1...Se6!
  • Keys
    • 1.Rf8!
      • 1...Sxe6
        • 2.Be8#
      • 1...gxh2
        • 2.Sgf7#
      • 1...Sf5
        • 2.Be8#
      • 1...Se8
        • 2.Bxe8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • S(e);N_GUARD,P_PINP(J),XP(I)::QAB(A)
        • P(a);XP(B)::QAR(A)+S(G)
        • S(e);N_GUARD,P_PINP(J)::QAB(A)
      • Refutation
        • S(e);P_PINP(J)
    • Try
      • R(L);CHECK,XS(e)
      • Vars
        • K(c);P-FLIGHT,XP(J)::QAB(A)
      • Refutation
        • B(g);XR(L)
    • Try
      • Q(A);XP(a)
      • Vars
        • S(e);XP(I)::QAR(A)+S(G),XS(e)
        • S(e);::QAR(A)+S(G),XP(f)
      • Refutation
        • S(e);
    • Try
      • P(C);
      • Vars
        • S(e);N_GUARD,XP(I)::P(C)
        • P(a);XP(B)::QAR(A)+S(G)
        • S(e);N_GUARD::P(C)
      • Refutation
        • S(e);
    • Try
      • P(I);
      • Vars
        • P(a);XP(B)::QAR(A)+S(G)
        • S(e);N_GUARD::B(K),XS(e)
        • S(e);N_GUARD::B(K)
      • Refutation
        • S(e);
  • Actual
    • R(L);
    • Vars
      • S(e);N_GUARD,XP(I)::B(K)
      • P(a);XP(B)::QAR(A)+S(G)
      • S(e);N_GUARD::B(K)
      • S(e);N_GUARD::B(K),XS(e)
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