MESON Chess Problem Database

Problem Display
PID: 249061 (1B1R4/2q2r2/1p2p3/pQn1k2N/p3P1P1/N1K1R3/b7/n7 w - - 0 1)

Klemperer, JH

Jerusalem Post, 1950

(First published on Fri May 12 1950)

1B1R4/2q2r2/1p2p3/pQn1k2N/p3P1P1/N1K1R3/b7/n7

#2

9 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Bxd6#
    • 1...Rf1
      • 2.Bxc7#
    • 1...Rf2
      • 2.Bxc7#
    • 1...Rf3
      • 2.Bxc7#
    • 1...Rf4
      • 2.Bxc7#
    • 1...Rf5
      • 2.Bxc7#
      • 2.exf5#
    • 1...Rf6
      • 2.Bxc7#
    • 1...Rf8
      • 2.Bxc7#
    • 1...Bb1
      • 2.Sc4#
    • 1...Bc4
      • 2.Sxc4#
    • 1...Sb3
      • 2.Sc4#
  • Tries
    • 1.Qxc5+?
      • 1...Bd5
        • 2.Sc4#
        • 2.exd5#
      • 1...bxc5!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Kd2#
      • 1...Scb3+
        • 2.Sc4#
      • 1...Sd3+
        • 2.Kxd3#
      • 1...Sxe4+
        • 2.Kd3#
      • 1...Sd7+
        • 2.Bxc7#
      • 1...Rd7
        • 2.Qh2#
      • 1...Qd6
        • 2.Bxd6#
      • 1...Rf2
        • 2.Bxc7#
      • 1...Sc2
        • 2.Kxc2#
      • 1...Sab3
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • Q(i);OGATE::B(H),XQ(i)
    • R(j);N_GUARD::B(H),XQ(i)
    • R(j);N_GUARD,P_PINR(C)::B(H),XQ(i)
    • B(b);N_GUARD::S(A)
    • B(b);N_GUARD::S(A),XB(b)
    • S(a);S_CUTB(b)::S(A)
  • Tries
    • Try
      • Q(F);CHECK,P_SPINQ(F),XS(e)
      • Refutation
        • P(g);XQ(F)
  • Actual
    • Q(F);N_PINS(e)
    • Threat
      • QAB(F)+K(B)
    • Vars
      • S(e);CHECK,S_CUTB(b)::S(A)
      • S(e);CHECK::QAB(F)+K(B),XS(e)
      • S(e);CHECK,P_SPINS(e),XP(D)::QAB(F)+K(B)
      • S(e);CHECK,S_CUTR(j)::B(H),XQ(i)
      • R(j);N_GUARD::QAB(F)
      • Q(i);OGATE::B(H),XQ(i)
      • R(j);N_GUARD::B(H),XQ(i)
      • S(a);::QAB(F)+K(B),XS(a)
      • S(a);S_CUTB(b)::S(A)
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