MESON Chess Problem Database

Problem Display
PID: 107995 (1n1k4/8/2R5/3K4/8/4Q3/3R4/5B2 w - - 0 1)

Doduchkin, S

Serp i molot, 1989

1n1k4/8/2R5/3K4/8/4Q3/3R4/5B2

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.Kc5#
    • 1...Sa6
      • 2.Kc4#
  • Tries
    • 1.Ke6+?
      • 1...Ke8
        • 2.Rc8#
      • 1...Sd7!
    • 1.Bh3?
      • threat
        • 2.Rc8#
      • 1...Sxc6
        • 2.Kxc6#
      • 1...Sd7!
    • 1.Rdc2?
      • 1...Kd7
        • 2.Rd6#
      • 1...Sd7
        • 2.Rc8#
      • 1...Sa6
        • 2.Rd6#
      • 1...Sxc6!
    • 1.Re2?
      • threat
        • 2.Qe7#
        • 2.Qe8#
      • 1...Kd7
        • 2.Qe7#
        • 2.Qe8#
      • 1...Sxc6!
    • 1.Rc8+?
      • 1...Kd7
        • 2.Bh3#
        • 2.Qe6#
        • 2.Qe8#
      • 1...Kxc8!
    • 1.Qe6?
      • threat
        • 2.Rc8#
      • 1...Sxc6
        • 2.Kxc6#
      • 1...Sd7!
  • Keys
    • 1.Ba6!
      • 1...Kd7
        • 2.Kc5#
      • 1...Sxa6
        • 2.Kc4#
      • 1...Sxc6
        • 2.Kxc6#
      • 1...Sd7
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::R(B)+K(D)
    • S(a);N_GUARD::R(B)+K(D)
  • Tries
    • Try
      • K(D);CHECK,S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::R(E)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • B(A);
      • Threat
        • R1(E)
      • Vars
        • S(a);XR(E)::R(B)+K(D),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::R1(E)
        • S(a);SBLOCK::R1(E)
        • S(a);N_GUARD::R(E)
      • Refutation
        • S(a);XR(E)
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Refutation
        • S(a);XR(E)
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);P-FLIGHT,XR(E)
    • Try
      • Q(C);
      • Threat
        • R1(E)
      • Vars
        • S(a);XR(E)::R(B)+K(D),XS(a)
      • Refutation
        • S(a);
  • Actual
    • B(A);
    • Vars
      • K(b);P-FLIGHT::R(B)+K(D)
      • S(a);N_GUARD,XB(A)::R(B)+K(D)
      • S(a);XR(E)::R(B)+K(D),XS(a)
      • S(a);SBLOCK::R1(E)
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