MESON Chess Problem Database

Problem Display
PID: 147975 (4b3/KB6/1p2p3/pkBr1q1R/2R5/8/8/5Q2 w - - 0 1)

Loshinski, Lev Ilich

Umnov, Evgeny Ivanovich

Bristol Times, 1930

(First published on Tue Apr 15 1930)

4b3/KB6/1p2p3/pkBr1q1R/2R5/8/8/5Q2

#2

6 + 7

35 L'Italia Scacchistica 1930

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Ba6#
  • Tries
    • 1.Bxb6?
      • threat
        • 2.Ba6#
      • 1...Qh7
        • 2.Re4#
      • 1...Qf7
        • 2.Rf4#
      • 1...Rd7
        • 2.Rd4#
      • 1...Rc5!
  • Keys
    • 1.Ba3!
      • threat
        • 2.Ba6#
      • 1...a4
        • 2.Rc5#
      • 1...Rc5
        • 2.Rb4#
      • 1...Qh7
        • 2.Re4#
      • 1...Qf7
        • 2.Rf4#
      • 1...Rd7
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(g);SBLOCK::B(F)
  • Tries
    • Try
      • B(C);XP(e)
      • Threat
        • B(F)
      • Vars
        • Q(d);N_GUARD,P_PINB(F),P_SPINR(c)::QAB(A)+R(B)
        • R(c);P_PINB(F),P_SPINQ(d)::QAB(A)+R(B)
      • Refutation
        • R(c);
  • Actual
    • B(C);
    • Threat
      • B(F)
    • Vars
      • P(a);SBLOCK::QAB(A)+R(B),DCHECK
      • R(c);SBLOCK::QAB(A)+R(B),DCHECK
      • Q(d);N_GUARD,P_PINB(F),P_SPINR(c)::QAB(A)+R(B)
      • R(c);P_PINB(F),P_SPINQ(d)::QAB(A)+R(B)
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