MESON Chess Problem Database

Problem Display
PID: 15612 (1B4B1/1N1K2p1/2p3Q1/2p5/1pPkPN2/8/2bP4/4r1n1 w - - 0 1)

Rychkov, Vladimir Nikolaevich

3rd Prize, Leninets (Ivanov), 1986

1B4B1/1N1K2p1/2p3Q1/2p5/1pPkPN2/8/2bP4/4r1n1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Qd6#
    • 1...Bxe4
      • 2.Qxg7#
  • Tries
    • 1.Sa5?
      • threat
        • 2.Sxc6#
      • 1...Bxe4
        • 2.Sb3#
        • 2.Qxg7#
      • 1...Ba4!
    • 1.Sd6?
      • threat
        • 2.Qxg7#
      • 1...Ke5
        • 2.Sb5#
      • 1...Rxe4
        • 2.Sf5#
      • 1...Sf3!
    • 1.Sd8?
      • threat
        • 2.Sxc6#
      • 1...Bxe4
        • 2.Qxg7#
      • 1...Ba4!
    • 1.Qf5?
      • threat
        • 2.Be5#
        • 2.Qe5#
      • 1...Rxe4
        • 2.Qxc5#
      • 1...Sf3!
    • 1.Qxc6?
      • threat
        • 2.Qd5#
      • 1...Bxe4
        • 2.Qxc5#
      • 1...Ba4!
    • 1.Qe6?
      • threat
        • 2.Qe5#
      • 1...Rxe4
        • 2.Qd6#
      • 1...Sf3!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Qd6#
      • 1...Kxc5
        • 2.Ba7#
      • 1...Bxe4
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK,XP(C)::QAR2(E)
    • B(c);SBLOCK,XP(C)::QAB(E),XP(h)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F),XP(g)
      • Refutation
        • B(c);
    • Try
      • S(F);
      • Threat
        • QAB(E),XP(h)
      • Vars
        • K(e);S_FLIGHT::B(H)+S(F)
        • R(a);SBLOCK,XP(C)::S(F)
      • Refutation
        • S(b);
    • Try
      • S(F);
      • Threat
        • S(F),XP(g)
      • Vars
        • B(c);SBLOCK,XP(C)::QAB(E),XP(h)
      • Refutation
        • B(c);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);SBLOCK,XP(C)::QAB1(E),XP(f)
      • Refutation
        • S(b);
    • Try
      • Q(E);XP(g)
      • Threat
        • QAR1(E)
      • Vars
        • B(c);SBLOCK,XP(C)::QAB1(E),XP(f)
      • Refutation
        • B(c);P_PINQ(E)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • R(a);SBLOCK,XP(C)::QAR2(E)
      • Refutation
        • S(b);
  • Actual
    • S(F);XP(f)
    • Threat
      • QAR2(E)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(F)::B(H)
      • B(c);N_GUARD,XP(C)::S(F)
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