MESON Chess Problem Database

Problem Display
PID: 180470 (4n3/2P5/2p1B2p/2kp2pR/KR6/8/7B/8 w - - 0 1)

Lider, Valentin Viktorovich

British Chess Magazine, 1974

4n3/2P5/2p1B2p/2kp2pR/KR6/8/7B/8

#2

6 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.c8Q?
      • 1...Sf6
        • 2.Qf8#
      • 1...Sc7
        • 2.Qf8#
      • 1...Sg7
        • 2.Qf8#
      • 1...d4
        • 2.Rb5#
      • 1...g4
        • 2.Rxd5#
      • 1...Sd6!
  • Keys
    • 1.c8S!
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sf6
        • 2.Bd6#
      • 1...Sc7
        • 2.Bd6#
      • 1...Sg7
        • 2.Bd6#
      • 1...d4
        • 2.Rc4#
      • 1...g4
        • 2.Bg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(F);P_PINP(d)
      • Vars
        • S(f);OGATE::QAB(F)
        • S(f);N_SPINP(d),OGATE::QAB(F)
        • P(b);N_SPINP(d),P_SPINP(c),SBLOCK::R1(C)
        • P(c);N_SPINP(d),OGATE,P_SPINP(b)::R1(D),XP(b)
      • Refutation
        • S(f);
  • Actual
    • P(F);
    • Vars
      • S(f);N_GUARD::B(A),XS(f)
      • S(f);N_GUARD::B(A)
      • P(b);N_GUARD,P_SPINP(c)::R1(C)
      • P(c);P_SPINP(b)::B(A)
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