MESON Chess Problem Database

Problem Display
PID: 94568 (k7/1R6/8/8/8/2p3b1/K1b5/Q6B w - - 0 1)

Dikusarov, Andrey Nikolayovich

Magadansky Komsomolets, 1983

k7/1R6/8/8/8/2p3b1/K1b5/Q6B

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1+
      • 2.Kxb1#
    • 1...Bb3+
      • 2.Kxb3#
    • 1...Bf5
      • 2.Kb3#
    • 1...Bg6
      • 2.Kb3#
    • 1...Bh7
      • 2.Kb3#
  • Tries
    • 1.Rb4+?
      • 1...Be4
        • 2.Kb3#
      • 1...Ka7!
    • 1.Rb5+?
      • 1...Be4
        • 2.Kb3#
      • 1...Ka7!
    • 1.Rb6+?
      • 1...Be4
        • 2.Kb3#
      • 1...Ka7!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qa7#
      • 1...Bb1+
        • 2.Rxb1#
      • 1...Bb3+
        • 2.Rxb3#
      • 1...Bf2
        • 2.Qg8#
      • 1...Bb8
        • 2.Ra7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(a);CHECK::QAR(A)+K(C),XB(a)
    • B(a);::QAR(A)+K(C)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAR(A)+K(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAR(A)+K(C)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAR(A)+K(C)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(a);CHECK,N_GUARD::B(B)+R(D),XB(a)
      • B(c);OGATE::QAR(A)
      • B(c);SBLOCK::B(B)+R(D),DCHECK
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