MESON Chess Problem Database

Problem Display
PID: 15438 (4q1N1/r3bpQ1/p2BR2P/RB3k2/8/2p2rn1/8/K4b2 w - - 0 1)

Lukyanov, Valentin Volodimirovich

19th Place, 02. WCCT, 1980-1983

4q1N1/r3bpQ1/p2BR2P/RB3k2/8/2p2rn1/8/K4b2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Qe5#
    • 1...Qf8
      • 2.Bc4#
    • 1...Qxg8
      • 2.Bc4#
    • 1...Rf4
      • 2.Re5#
    • 1...Rd7
      • 2.Bc4#
    • 1...Bg2
      • 2.Bd7#
    • 1...Bh3
      • 2.Bd7#
    • 1...Se2
      • 2.Bd7#
    • 1...fxe6
      • 2.Bd3#
  • Tries
    • 1.Sxe7+?
      • 1...Kxe6
        • 2.Qe5#
      • 1...Qxe7
        • 2.Bc4#
      • 1...Rxe7!
    • 1.Bxf1+?
      • 1...Qb5
        • 2.Bh3#
      • 1...Kxe6!
    • 1.Bc6+?
      • 1...Kxe6
        • 2.Qe5#
      • 1...Bb5!
    • 1.Bxe8+?
      • 1...Kxe6
        • 2.Qe5#
      • 1...Bb5!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qg4#
      • 1...Kxe4
        • 2.Qe5#
      • 1...Qxg8
        • 2.Bd3#
      • 1...Sxe4
        • 2.Bd7#
      • 1...Rf4
        • 2.Re5#
      • 1...Bh3
        • 2.Bc6#
      • 1...Bg5
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • K(e);S_FLIGHT,XR(E)::QAR1(G)
    • Q(j);N_GUARD::R(B)+B(C)
    • Q(j);N_GUARD,XS(H)::R(B)+B(C)
    • R(c);SBLOCK::R1(E)
    • R(g);S_CUTQ(j)::R(B)+B(C)
    • B(a);N_GUARD::R(B)+B(C)
    • S(d);S_CUTB(a)::R(B)+B(C)
    • P(i);SBLOCK,XR(E)::R(B)+B(C),DCHECK
  • Tries
    • Try
      • S(H);CHECK,XB(h)
      • Vars
        • K(e);S_FLIGHT,XR(E)::QAR1(G)
        • Q(j);XS(H)::R(B)+B(C)
      • Refutation
        • R(g);XS(H)
    • Try
      • B(C);CHECK,XB(a)
      • Vars
        • Q(j);P_SPINQ(j)::B(C)
      • Refutation
        • K(e);S_FLIGHT,XR(E)
    • Try
      • B(C);CHECK
      • Vars
        • K(e);S_FLIGHT,XR(E)::QAR1(G)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • B(C);CHECK,XQ(j)
      • Vars
        • K(e);S_FLIGHT,XR(E)::QAR1(G)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • R(E);
    • Threat
      • QAB1(G)
    • Vars
      • K(e);S_FLIGHT,XR(E)::QAR1(G)
      • Q(j);N_GUARD,XS(H)::R(B)+B(C)
      • S(d);SBLOCK,XR(E)::R(B)+B(C),DCHECK
      • R(c);SBLOCK::R1(E)
      • B(a);N_GUARD::R(B)+B(C)
      • B(h);SBLOCK::QAB(G)
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