MESON Chess Problem Database

Problem Display
PID: 152063 (bb4R1/r1pBK3/r3pp2/p1Qp1k1N/3P1N1P/8/5n2/4R3 w - - 0 1)

Karpov, Valery N

Comm., UV CSTV, 1983

bb4R1/r1pBK3/r3pp2/p1Qp1k1N/3P1N1P/8/5n2/4R3

#2

9 + 11

3485 Sachova skladba 1985

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Qxd5#
    • 1...Rb7
      • 2.Qxd5#
    • 1...Bc6
      • 2.Bxe6#
    • 1...Sd1
      • 2.Qc2#
    • 1...Sh1
      • 2.Qc2#
    • 1...Sh3
      • 2.Qc2#
    • 1...Sg4
      • 2.Qc2#
  • Tries
    • 1.Sg2?
      • threat
        • 2.Sg3#
      • 1...Sh1
        • 2.Qc2#
      • 1...Se4
        • 2.Se3#
      • 1...c6!
    • 1.Sxe6?
      • threat
        • 2.Sg3#
      • 1...Rxe6+
        • 2.Bxe6#
      • 1...Sh1
        • 2.Qc2#
      • 1...c6
        • 2.Sc7#
      • 1...Se4!
    • 1.Qc1?
      • threat
        • 2.Sg3#
      • 1...Sh1
        • 2.Qb1#
        • 2.Qc2#
      • 1...Se4!
    • 1.Qc2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se4!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Sg3#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Sh1
        • 2.Qc2#
      • 1...Se4
        • 2.Se3#
      • 1...c6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(e);S_CUTB(j)::QAR2(E),XP(c)
    • R(h);S_CUTB(j)::QAR2(E),XP(c)
    • B(j);S_CUTR(e)::B(G),XP(f)
    • S(a);N_GUARD::QAB(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(F)
      • Vars
        • S(a);N_GUARD::QAB(E)
        • S(a);SBLOCK::S(C)
      • Refutation
        • P(i);P_PINB(G)
    • Try
      • S(C);XP(f)
      • Threat
        • S(F)
      • Vars
        • R(e);CHECK,OGATE,P_SPINR(e),XS(C)::B(G),XR(e)
        • S(a);N_GUARD::QAB(E)
        • P(i);P_PINB(G),S_CUTR(e)::B(G)+S(C)
      • Refutation
        • S(a);
    • Try
      • Q(E);N_PINP(c),P_PINP(f)
      • Threat
        • S(F)
      • Refutation
        • S(a);
    • Try
      • Q(E);CHECK,N_PINP(c),P_PINP(f)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(E),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • S(C);P_PINP(f),XP(c)
    • Threat
      • S(F)
    • Vars
      • B(j);OGATE,P_SPINB(j),XS(C)::QAR2(E),XB(j)
      • S(a);N_GUARD::QAB(E)
      • S(a);SBLOCK::QAR(E)+S(C),DCHECK
      • P(i);P_PINB(G),S_CUTB(j)::QAR(E)+S(C)
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