MESON Chess Problem Database

Problem Display
PID: 64526 (b7/Q7/pp1b2p1/3pp3/r3kpP1/2p2NPK/2P1BP2/8 w - - 0 1)

Frigin, Valery Fedorovich

1st HM., British Chess Magazine, 1980

b7/Q7/pp1b2p1/3pp3/r3kpP1/2p2NPK/2P1BP2/8

#2

8 + 11

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sg5#
    • 1...d4
      • 2.Qxa8#
    • 1...b5
      • 2.Sg5#
    • 1...g5
      • 2.Qh7#
  • Tries
    • 1.Kg2?
      • threat
        • 2.Bd3#
      • 1...d4
        • 2.Qxa8#
      • 1...Rd4
        • 2.Sg5#
      • 1...fxg3!
    • 1.Qxb6?
      • threat
        • 2.Sg5#
      • 1...fxg3
        • 2.Qe3#
      • 1...Bc5
        • 2.Qxg6#
      • 1...Be7
        • 2.Qxg6#
      • 1...g5
        • 2.Sxg5#
      • 1...d4!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qxg6#
      • 1...fxg3
        • 2.Bd3#
      • 1...d4
        • 2.Sg5#
      • 1...g5
        • 2.Qg6#
        • 2.Qf5#
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(b);SBLOCK::S(D)
    • P(e);OGATEB::QAB(H),XB(k)
    • P(h);::S(D)
    • P(j);OGATEB::QAB(H)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • B(B)
      • Vars
        • P(e);OGATEB::QAB(H),XB(k)
        • R(b);SBLOCK::S(D)
      • Refutation
        • P(d);XP(E)
    • Try
      • Q(H);XP(h)
      • Threat
        • S(D)
      • Vars
        • P(d);N_GUARD,XP(E)::QAR1(H)
        • B(i);OGATE::QAB(H),XP(j)
        • P(j);::S(D),XP(j)
      • Refutation
        • P(e);
  • Actual
    • Q(H);
    • Threat
      • QAB(H),XP(j)
    • Vars
      • P(d);XP(E)::B(B)
      • P(e);SBLOCK::S(D)
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