MESON Chess Problem Database

Problem Display
PID: 266063 (8/B7/4rPB1/6R1/4P1N1/1Q1Npk2/3b3P/7K w - - 0 1)

Popov, Valery

64 Shakhmatnoe obozrenie, 1989

8/B7/4rPB1/6R1/4P1N1/1Q1Npk2/3b3P/7K

#2

10 + 4

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sgf2?
      • threat
        • 2.Bh5#
      • 1...Ke2
        • 2.Qd1#
      • 1...exf2
        • 2.Qd1#
      • 1...Rxe4!
    • 1.Sxe3?
      • threat
        • 2.Qd1#
      • 1...Ke2
        • 2.Bh5#
      • 1...Rb6!
  • Keys
    • 1.Bh5!
      • threat
        • 2.Sgf2#
      • 1...Ke2
        • 2.Sxe3#
      • 1...Kxe4
        • 2.Qd5#
      • 1...Rxe4
        • 2.Sge5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);
      • Threat
        • B(I)
      • Vars
        • K(c);S_CUTP(b),S_FLIGHT::QAB1(C)
        • P(b);N_GUARD,XS(F)::QAB(C)
      • Refutation
        • R(d);XP(E)
    • Try
      • S(F);XP(b)
      • Threat
        • QAB(C)
      • Vars
        • K(c);N_GUARD,S_FLIGHT::B(I)
      • Refutation
        • R(d);
  • Actual
    • B(I);
    • Threat
      • B(I)+S(F)
    • Vars
      • K(c);N_GUARD,S_FLIGHT::B(I)+S(F),XP(b)
      • K(c);OGATEB,S_FLIGHT,XP(E)::QAB1(C)
      • R(d);SBLOCK,XP(E)::B(I)+S(F),DCHECK
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