MESON Chess Problem Database

Problem Display
PID: 258768 (8/Q3K3/2P5/Rp1pkppR/2p1b3/N2p1pP1/3P1N2/8 w - - 0 1)

Erokhin, Vladimir Alekseevich

Szachy, 1979

8/Q3K3/2P5/Rp1pkppR/2p1b3/N2p1pP1/3P1N2/8

#2

9 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Sxc4#
    • 1...g4
      • 2.Sxg4#
  • Tries
    • 1.Sxb5?
      • threat
        • 2.Qd4#
        • 2.Qb8#
        • 2.Qc7#
      • 1...d4
        • 2.Qxd4#
      • 1...f4!
    • 1.Rxb5?
      • threat
        • 2.Sxc4#
      • 1...c3
        • 2.Sc4#
      • 1...f4!
  • Keys
    • 1.Qe3!
      • 1...d4
        • 2.Rxb5#
      • 1...f4
        • 2.Rxg5#
      • 1...c3
        • 2.Sxd3#
      • 1...b4
        • 2.Sxc4#
      • 1...g4
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD,P_SPINP(f)::S(C),XP(c)
    • P(i);P_SPINP(h)::S(B),XP(i)
  • Tries
    • Try
      • S(C);XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • P(f);::QAB1(H),XP(f)
      • Refutation
        • P(h);P_SPINP(i)
    • Try
      • R(E);P_PINP(f),XP(e)
      • Threat
        • S(C),XP(c)
      • Vars
        • P(c);::S(C)
      • Refutation
        • P(h);
  • Actual
    • Q(H);P_PINB(d)
    • Vars
      • P(f);OGATEB,P_SPINP(e)::R(E),XP(e)
      • P(h);OGATEB,P_SPINP(i)::R(F),XP(i)
      • P(c);N_GUARD::S(B),XP(a)
      • P(e);N_GUARD,P_SPINP(f)::S(C),XP(c)
      • P(i);P_SPINP(h)::S(B),XP(i)
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Developed and maintained by Brian Stephenson.
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