MESON Chess Problem Database

Problem Display
PID: 272445 (3B4/p2R4/P2b4/RnNkNp1B/3p1P2/p7/P2K4/8 w - - 0 1)

Erokhin, Vladimir Alekseevich

diagrammes, 1977

3B4/p2R4/P2b4/RnNkNp1B/3p1P2/p7/P2K4/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Bf7#
    • 1...Sc7
      • 2.Bf3#
  • Tries
    • 1.Kd3?
      • 1...Sc3
        • 2.Bf7#
      • 1...Sc7
        • 2.Bf3#
      • 1...Kxc5!
    • 1.Se6?
      • 1...Ke4
        • 2.Bf3#
      • 1...Kxe6
        • 2.Bf7#
      • 1...d3!
    • 1.Be2?
      • 1...Kxc5
        • 2.Rxb5#
      • 1...Sc3
        • 2.Bc4#
      • 1...Sc7
        • 2.Bf3#
        • 2.Bc4#
      • 1...d3!
  • Keys
    • 1.Scd3!
      • 1...Ke4
        • 2.Bf3#
      • 1...Ke6
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(c);::B(G)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(c);::B(G)
      • Refutation
        • K(d);N_SPINB(f),P-FLIGHT,P_SPINS(c),XS(E)
    • Try
      • S(E);P_PINS(c)
      • Vars
        • K(d);N_GUARD,N_SPINB(f),N_SPINS(c),S_FLIGHT::B(G)
        • K(d);N_SPINB(f),N_SPINS(c),OGATEB,S_FLIGHT,XS(E)::B(G)
      • Refutation
        • P(b);
    • Try
      • B(G);
      • Vars
        • K(d);N_SPINB(f),OGATEB,P-FLIGHT,P_SPINS(c),XS(E)::R1(D),XS(c)
        • S(c);::B(G)
      • Refutation
        • P(b);
  • Actual
    • S(E);P_PINS(c)
    • Vars
      • K(d);N_GUARD,N_SPINB(f),N_SPINS(c),S_FLIGHT::B(G)
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