MESON Chess Problem Database

Problem Display
PID: 117096 (1K6/1p2BQn1/pPk2b1R/P7/2Np1pB1/5rq1/2R1P3/1r6 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Vecherni Leningrad, 1981

1K6/1p2BQn1/pPk2b1R/P7/2Np1pB1/5rq1/2R1P3/1r6

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Bd7#
    • 1...Rb5
      • 2.Se5#
  • Tries
    • 1.Sb2+?
      • 1...Kb5
        • 2.Qd5#
      • 1...Rc3!
    • 1.Rxf6+?
      • 1...Kb5
        • 2.Bd7#
      • 1...Se6!
    • 1.Qe6+?
      • 1...Kb5
        • 2.Qd7#
      • 1...Sxe6!
    • 1.Qxf6+?
      • 1...Kb5
        • 2.Bd7#
      • 1...Kd5
        • 2.Qe5#
      • 1...Se6!
  • Keys
    • 1.e4!
      • threat
        • 2.Qd5#
      • 1...fxe4 ep+
        • 2.Sd6#
      • 1...Kb5
        • 2.Bd7#
      • 1...dxe4 ep
        • 2.Sa3#
      • 1...Se6
        • 2.Qe8#
      • 1...Rb5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);N_SPINB(h),S_FLIGHT::B(D)
    • R(a);SBLOCK::R(A)+S(C),DCHECK
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(g);N_SPINB(h),S_FLIGHT::QAR2(I)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • R(G);CHECK,XB(h)
      • Vars
        • K(g);S_FLIGHT::B(D)
      • Refutation
        • S(j);P_SPINS(j)
    • Try
      • Q(I);CHECK,N_PINB(h)
      • Vars
        • K(g);S_FLIGHT::QAB(I)
      • Refutation
        • S(j);XQ(I)
    • Try
      • Q(I);CHECK,XB(h)
      • Vars
        • K(g);S_FLIGHT::B(D)
        • K(g);S_FLIGHT::QAR1(I)
      • Refutation
        • S(j);P_SPINS(j)
  • Actual
    • P(B);
    • Threat
      • QAB1(I)
    • Vars
      • P(e);CHECK,EP,S_CUTR(b),XP(B)::R(A)+S(C)
      • K(g);N_SPINB(h),S_FLIGHT::B(D)
      • P(d);EP,S_CUTR(b),XP(B)::R(A)+S(C)
      • S(j);N_GUARD,N_SPINB(h)::QAB(I)
      • R(a);SBLOCK::R(A)+S(C),DCHECK
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