MESON Chess Problem Database

Problem Display
PID: 146804 (7Q/2p5/3p2p1/3P2N1/2PR1P2/B3k1p1/5rn1/2N2nK1 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Canadian Chess Chat, 1983

7Q/2p5/3p2p1/3P2N1/2PR1P2/B3k1p1/5rn1/2N2nK1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Re4#
    • 1...Rxf4
      • 2.Rd3#
  • Tries
    • 1.Bb4?
      • threat
        • 2.Re4#
      • 1...Rxf4
        • 2.Rd3#
      • 1...Sd2!
    • 1.Bxd6?
      • threat
        • 2.Rd3#
        • 2.Qe5#
      • 1...Rxf4
        • 2.Rd3#
      • 1...Sxf4
        • 2.Qe5#
      • 1...Rd2
        • 2.Re4#
        • 2.Qe5#
      • 1...Sd2
        • 2.Rd3#
      • 1...Se1
        • 2.Qe5#
      • 1...cxd6!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qe8#
      • 1...Rxf4
        • 2.Rd3#
      • 1...Sxf4
        • 2.Rd3#
      • 1...dxc5
        • 2.Qe5#
      • 1...Sd2
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK::R1(E)
    • R(b);SBLOCK,XP(F)::R1(E)
  • Tries
    • Try
      • B(C);
      • Threat
        • R1(E)
      • Vars
        • R(b);SBLOCK,XP(F)::R1(E)
      • Refutation
        • S(a);
    • Try
      • B(C);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(F)::R1(E)
        • S(c);XP(F)::QAR2(I)
        • S(a);::R1(E)
        • S(c);::QAR2(I)
      • Refutation
        • P(h);XB(C)
  • Actual
    • B(C);
    • Threat
      • QAR(I)
    • Vars
      • R(b);SBLOCK,XP(F)::B(C)+R(E),DCHECK
      • S(c);SBLOCK,XP(F)::B(C)+R(E),DCHECK
      • P(f);N_GUARD,XB(C)::QAR2(I)
      • S(a);SBLOCK::B(C)+R(E),DCHECK
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