MESON Chess Problem Database

Problem Display
PID: 251651 (3R3n/4Q3/4p3/4p2p/R1r2b2/1N3k1B/7P/3N1K2 w - - 0 1)

Soroka, Ivan Ivanovich

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Probleemblad, 1982

3R3n/4Q3/4p3/4p2p/R1r2b2/1N3k1B/7P/3N1K2

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qb7#
  • Tries
    • 1.Rd3+?
      • 1...Ke4
        • 2.Sf2#
        • 2.Sc5#
      • 1...Be3!
    • 1.Qg5?
      • threat
        • 2.Bg2#
        • 2.Qg2#
      • 1...Ke4
        • 2.Bg2#
        • 2.Qg2#
      • 1...Bxh2
        • 2.Sd2#
        • 2.Bg2#
        • 2.Qe3#
      • 1...Rc2
        • 2.Qxh5#
      • 1...Bc1
        • 2.Bg2#
      • 1...Bd2
        • 2.Sxd2#
        • 2.Bg2#
      • 1...Be3
        • 2.Bg2#
        • 2.Qxe3#
      • 1...Bg3
        • 2.Sd2#
        • 2.Bg2#
        • 2.Qe3#
      • 1...Bxg5!
    • 1.Qf6?
      • threat
        • 2.Sd2#
      • 1...Ke4
        • 2.Bg2#
      • 1...Rc2
        • 2.Rd3#
      • 1...Rd4!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Bg2#
      • 1...Ke4
        • 2.Sd2#
      • 1...Rc2
        • 2.Qxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINR(b),S_CUTP(d),S_FLIGHT::QAB(G)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAB(G),XP(e)
        • B(c);::B(E)
      • Refutation
        • B(c);XQ(G)
    • Try
      • Q(G);P_PINB(c)
      • Threat
        • S(D)
      • Vars
        • K(a);N_GUARD,N_SPINB(c),P_SPINR(b),S_FLIGHT::B(E)
        • R(b);::R(H)
      • Refutation
        • R(b);
  • Actual
    • Q(G);
    • Threat
      • B(E)
    • Vars
      • K(a);P_SPINB(c),P_SPINR(b),S_FLIGHT::S(D)
      • R(b);::QAB(G),XP(e)
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