MESON Chess Problem Database

Problem Display
PID: 180329 (8/1K1N2p1/2ppp3/3k2n1/R5B1/3P4/8/2BR4 w - - 0 1)

Lider, Valentin Viktorovich

Hlas l'udu, 1985

8/1K1N2p1/2ppp3/3k2n1/R5B1/3P4/8/2BR4

#2

7 + 6

6490 yacpdb 2018
3713 Snap 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Bxf3#
    • 1...Sh3
      • 2.Bf3#
    • 1...Se4
      • 2.dxe4#
    • 1...Sf7
      • 2.Bf3#
    • 1...Sh7
      • 2.Bf3#
  • Tries
    • 1.Sb6+?
      • 1...Ke5
        • 2.Bb2#
      • 1...Kc5!
    • 1.Bb2?
      • threat
        • 2.Rd4#
      • 1...Sf3
        • 2.Bxf3#
      • 1...c5
        • 2.Sb6#
      • 1...e5!
    • 1.Be3?
      • threat
        • 2.Rd4#
      • 1...e5
        • 2.Sb6#
      • 1...Sf3
        • 2.Bxf3#
      • 1...c5!
    • 1.Bf3+?
      • 1...Se4
        • 2.Bxe4#
        • 2.dxe4#
      • 1...Sxf3!
  • Keys
    • 1.d4!
      • 1...Ke4
        • 2.d5#
      • 1...e5
        • 2.dxe5#
      • 1...Sf3
        • 2.Bxf3#
      • 1...Sh3
        • 2.Bf3#
      • 1...Se4
        • 2.Sb6#
      • 1...Sf7
        • 2.Bf3#
      • 1...Sh7
        • 2.Bf3#
      • 1...c5
        • 2.dxc5#
      • 1...g6
        • 2.Sf6#

This anticipates 287519(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::B(E),XS(b)
    • S(b);N_GUARD::B(E)
    • S(b);OGATE::R(B)+P(C)DCHECK,XS(b)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(a);P-FLIGHT::B(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Threat
        • R1(D)
      • Vars
        • S(b);N_GUARD::B(E),XS(b)
        • P(c);SBLOCK::S(G)
      • Refutation
        • P(e);
    • Try
      • B(A);
      • Threat
        • R1(D)
      • Vars
        • P(e);SBLOCK::S(G)
        • S(b);N_GUARD::B(E),XS(b)
      • Refutation
        • P(c);
    • Try
      • B(E);CHECK
      • Refutation
        • S(b);XB(E)
  • Actual
    • P(C);
    • Vars
      • K(a);OGATE,S_FLIGHT::R(D)+P(C)
      • P(e);OGATE::R(B)+P(C),XP(e)
      • S(b);N_GUARD::B(E),XS(b)
      • S(b);N_GUARD::B(E)
      • S(b);SBLOCK::S(G)
      • P(c);OGATE::R(B)+P(C),XP(c)
      • P(f);N_GUARD::S(G)
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