MESON Chess Problem Database

Problem Display
PID: 36353 (4R3/2PK2Q1/4Np2/3pk3/4p2N/3P2pn/5q2/5r1b w - - 0 1)

Chernyavsky, Mykola Vasilovich

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

1st HM., Rokada, 1974

4R3/2PK2Q1/4Np2/3pk3/4p2N/3P2pn/5q2/5r1b

#2

7 + 9

3771 FIDE Album (1974-1976) 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.d4#
    • 1...Qa2
      • 2.d4#
    • 1...Qc2
      • 2.d4#
    • 1...Qe2
      • 2.d4#
    • 1...Qg2
      • 2.d4#
    • 1...Qh2
      • 2.d4#
    • 1...Qf3
      • 2.d4#
    • 1...Qf4
      • 2.d4#
    • 1...Qf5
      • 2.d4#
  • Tries
    • 1.Qxf6+?
      • 1...Qxf6
        • 2.d4#
      • 1...Kxf6!
    • 1.Qxg3+?
      • 1...Qxg3
        • 2.d4#
      • 1...Qf4
        • 2.d4#
      • 1...Sf4!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Sg6#
      • 1...d4
        • 2.Sf4#
      • 1...f5
        • 2.Qg7#
      • 1...Qf5
        • 2.d4#
      • 1...Sf4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::P(A)
    • Q(c);N_GUARD,P_PINS(C)::P(A)
  • Tries
    • Try
      • Q(F);CHECK,XP(i)
      • Vars
        • Q(c);SBLOCK,XQ(F)::P(A)
      • Refutation
        • K(h);S_FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK,N_PINP(i),XP(d)
      • Vars
        • Q(c);XQ(F)::P(A)
        • Q(c);P_SPINQ(c)::P(A)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • Q(F);N_PINP(i)
    • Threat
      • S(B)
    • Vars
      • P(g);SBLOCK::R(G)+S(C)
      • P(i);OGATEB::QAB(F)
      • Q(c);N_GUARD,P_PINS(C)::P(A)
      • S(e);S_CUTQ(c)::QAR1(F)
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