MESON Chess Problem Database

Problem Display
PID: 271677 (8/2rp4/3B2p1/3P4/1npk1P2/R1N2K2/4P3/3N4 w - - 0 1)

Shanshin, Valery Yurevich

Contromossa Scacchi, 1980

8/2rp4/3B2p1/3P4/1npk1P2/R1N2K2/4P3/3N4

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Be5#
    • 1...Sd3
      • 2.e3#
    • 1...Sxd5
      • 2.Sb5#
  • Tries
    • 1.Sb2?
      • threat
        • 2.e3#
      • 1...Sxd5
        • 2.Sb5#
      • 1...Sc2!
    • 1.Sf2?
      • threat
        • 2.e3#
      • 1...Sxd5
        • 2.Sb5#
      • 1...Sc2!
    • 1.Se3?
      • threat
        • 2.Sb5#
      • 1...Rc5
        • 2.Be5#
      • 1...Rb7!
    • 1.e4?
      • threat
        • 2.Se2#
        • 2.Sb5#
      • 1...Rc5
        • 2.Se2#
      • 1...Rb7
        • 2.Se2#
      • 1...Kd3!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Be5#
      • 1...Sd3
        • 2.e3#
      • 1...Sc6
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(e);SBLOCK::B(H)
    • S(a);SBLOCK::P(B)
    • S(a);SBLOCK,XP(G)::S(D)
  • Tries
    • Try
      • S(A);
      • Threat
        • P(B)
      • Vars
        • S(a);SBLOCK,XP(G)::S(D)
      • Refutation
        • S(a);
    • Try
      • S(A);
      • Threat
        • P(B)
      • Vars
        • S(a);SBLOCK,XP(G)::S(D)
      • Refutation
        • S(a);
    • Try
      • S(A);
      • Threat
        • S(D)
      • Vars
        • R(e);SBLOCK::B(H)
      • Refutation
        • R(e);
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);::S(D)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • R(C);
    • Threat
      • B(H)
    • Vars
      • S(a);SBLOCK::P(B)
      • S(a);S_CUTR(e)::B(H)
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Developed and maintained by Brian Stephenson.
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