MESON Chess Problem Database

Problem Display
PID: 117153 (8/B5Q1/1N1p4/1PR1pp2/1pq2p2/pBkP3K/5b2/1nNR4 w - - 0 1)

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

Krasnaya gazeta, 1936

8/B5Q1/1N1p4/1PR1pp2/1pq2p2/pBkP3K/5b2/1nNR4

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Sa4#
  • Tries
    • 1.Sd5+?
      • 1...Kd4
        • 2.Se2#
      • 1...Kb2!
    • 1.Qxe5+?
      • 1...Bd4
        • 2.Sa4#
      • 1...dxe5!
  • Keys
    • 1.Rxe5!
      • threat
        • 2.Sa4#
      • 1...Qxd3+
        • 2.Re3#
      • 1...Kb2
        • 2.Re2#
      • 1...Kd4
        • 2.Se2#
      • 1...Qxb3
        • 2.Rc5#
      • 1...Qxb5
        • 2.Rc5#
      • 1...Bxb6
        • 2.Rc5#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Bc5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(b);N_SPINP(h),SBLOCK::S(H)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(d);N_SPINQ(f),S_FLIGHT::S(A)
      • Refutation
        • K(d);N_SPINQ(f),S_FLIGHT
    • Try
      • Q(J);CHECK,XP(h)
      • Vars
        • B(b);P_SPINB(b)::S(H)
      • Refutation
        • P(j);XQ(J)
  • Actual
    • R(G);N_PINQ(f),XP(h)
    • Threat
      • S(H)
    • Vars
      • Q(f);CHECK,N_GUARD,XP(D)::QAB(J)+R(G)
      • K(d);S_FLIGHT::QAB(J)+R(G),DCHECK
      • K(d);S_FLIGHT::S(A)
      • Q(f);XB(C)::QAB(J)+R(G),DCHECK
      • Q(f);XP(F)::QAB(J)+R(G),DCHECK
      • B(b);N_GUARD,XS(H)::QAB(J)+R(G)
      • Q(f);::QAB(J)+R(G),DCHECK,XQ(f)
      • B(b);N_GUARD::QAB(J)+R(G),XB(b)
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