MESON Chess Problem Database

Problem Display
PID: 7617 (8/1rp3Q1/7p/1pN2k2/1K1R1q1p/2p4n/3N4/2B2R2 w - - 0 1)

Sushkov, Yuri Akimovich

Prize, Buletin Problemistic TT, 1993

8/1rp3Q1/7p/1pN2k2/1K1R1q1p/2p4n/3N4/2B2R2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Rfxf4#
      • 2.Rdxf4#
    • 1...Sg5
      • 2.Rfxf4#
      • 2.Rdxf4#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Se3#
        • 2.Rd5#
      • 1...Sg5
        • 2.Se3#
        • 2.Rfxf4#
        • 2.Rdxf4#
      • 1...Sf2
        • 2.Rxf4#
      • 1...c6
        • 2.Se3#
        • 2.Sd6#
      • 1...bxc4+!
    • 1.Sde4?
      • threat
        • 2.Rd5#
      • 1...Sg5
        • 2.Rxf4#
      • 1...c6
        • 2.Sd6#
      • 1...Sf2!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sxh4#
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...Qxf3
        • 2.Rd5#
      • 1...Sg5
        • 2.Rxf4#
      • 1...Sf2
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);N_SPINR(E)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD,N_SPINQ(c)::R1(E),XQ(c)
      • Refutation
        • P(e);CHECK,XS(C)
    • Try
      • S(C);N_SPINR(E)
      • Threat
        • R(E)
      • Vars
        • S(b);N_GUARD::R1(B),XQ(c)
        • P(i);N_GUARD::S(C)
      • Refutation
        • S(b);N_SPINQ(c)
  • Actual
    • S(C);N_PINQ(c)
    • Threat
      • S(C),XP(d)
    • Vars
      • Q(c);CHECK,XR(E)::R(B)+S(C),DCHECK,XQ(c)
      • Q(c);N_PINR(E),P_SPINQ(c),XS(C)::R(E)
      • S(b);N_GUARD::R1(E),XQ(c)
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