MESON Chess Problem Database

Problem Display
PID: 95024 (bB1RK3/3B2p1/2P5/3k4/1P2N3/1P2pN2/4n2p/7q w - - 0 1)

Saelski, Yiri

Cherkasskaya Pravda, 1981

bB1RK3/3B2p1/2P5/3k4/1P2N3/1P2pN2/4n2p/7q

#2

9 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sc3#
    • 1...Sg1
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sg3
      • 2.Sc3#
    • 1...Sd4
      • 2.Sc3#
    • 1...Sf4
      • 2.Sc3#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Bh3+?
      • 1...Kxe4
        • 2.Sg5#
      • 1...Kxc6!
    • 1.Bg4+?
      • 1...Kxe4
        • 2.Sg5#
      • 1...Kxc6!
    • 1.Bc8+?
      • 1...Kxe4
        • 2.Sg5#
      • 1...Kxc6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Bf5#
      • 1...Qxe4+
        • 2.Be6#
      • 1...Kxd4
        • 2.Bf5#
      • 1...Kxe4
        • 2.Bf5#
      • 1...Bxc6
        • 2.Bxc6#
      • 1...Sxd4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • S(b);N_GUARD::S(D)
    • S(b);N_GUARD::S(D),XS(b)
    • P(f);N_GUARD::S(D)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(D)::S(B)
      • Refutation
        • K(e);S_FLIGHT,XP(E)
    • Try
      • B(F);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(D)::S(B)
      • Refutation
        • K(e);S_FLIGHT,XP(E)
    • Try
      • B(F);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(D)::S(B)
      • Refutation
        • K(e);S_FLIGHT,XP(E)
  • Actual
    • S(B);
    • Threat
      • R(H)+B(F)
    • Vars
      • Q(a);CHECK,SBLOCK,XS(D)::R(H)+B(F),DCHECK
      • K(e);P-FLIGHT,XS(B)::R(H)+B(F)
      • K(e);S_FLIGHT,XS(D)::B(F)
      • B(g);OGATE,P_PINB(F),XP(E)::R(H)+B(F),DCHECK,XB(g)
      • S(b);N_GUARD,SBLOCK,XS(B)::S(D)
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