MESON Chess Problem Database

Problem Display
PID: 287574 (6Q1/5N2/4rp2/3n4/R2r1kNK/3R1p2/8/1B5b w - - 0 1)

Rudenko, Valentin Fedorovich

Probleemblad, 1959

6Q1/5N2/4rp2/3n4/R2r1kNK/3R1p2/8/1B5b

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rdxd4#
    • 1...Kf5
      • 2.Rxf3#
    • 1...Ra6
      • 2.Rdxd4#
    • 1...Rb6
      • 2.Rdxd4#
    • 1...Rc6
      • 2.Rdxd4#
    • 1...Rd6
      • 2.Rdxd4#
  • Tries
    • 1.Raxd4+?
      • 1...Kf5
        • 2.Sgh6#
        • 2.Sfh6#
        • 2.Rxf3#
        • 2.Qh7#
      • 1...Re4!
    • 1.Qg5+?
      • 1...Ke4
        • 2.Sf2#
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rda3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Re3#
        • 2.Rdxd4#
        • 2.Raxd4#
      • 1...fxg5+!
    • 1.Qb8+?
      • 1...Ke4
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rda3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Re3#
        • 2.Rdxd4#
      • 1...Kf5
        • 2.Rxf3#
      • 1...Re5
        • 2.Rdxd4#
      • 1...Rd6
        • 2.Rdxd4#
      • 1...Sc7!
  • Keys
    • 1.Sge5!
      • threat
        • 2.Qg4#
      • 1...Kf5+
        • 2.Rdxd4#
      • 1...Ke4
        • 2.Rxf3#
      • 1...Se3
        • 2.Rdxd4#
      • 1...f5
        • 2.Raxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(d);P-FLIGHT::B(A)+R(B),DCHECK,XR(c)
    • K(d);N_GUARD,N_SPINR(c),P-FLIGHT,P_PINS(D)::B(A)+R(B),DCHECK,XP(b)
    • R(f);N_GUARD::R(B),XR(c)
  • Tries
    • Try
      • R(C);CHECK,XR(c)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • Q(G);CHECK
      • Refutation
        • P(g);CHECK,XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);N_GUARD,N_SPINR(c),P-FLIGHT,P_PINS(D)::B(A)+R(B),DCHECK,XP(b)
        • R(f);::R(B),XR(c)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • S(D);
    • Threat
      • QAR1(G)
    • Vars
      • K(d);CHECK,N_GUARD,N_SPINR(c),P-FLIGHT::B(A)+R(B),XR(c)
      • K(d);P-FLIGHT,S_CUTB(a)::B(A)+R(B),XP(b)
      • S(e);SBLOCK::R(B),XR(c)
      • P(g);SBLOCK::R(C),XR(c)
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