MESON Chess Problem Database

Problem Display
PID: 248091 (Q2r4/1R3B2/8/8/N3b3/k1PR4/8/2K5 w - - 0 1)

Blikeng, Bjarne

Bukne, Roald

Dagbladet, 1973

Q2r4/1R3B2/8/8/N3b3/k1PR4/8/2K5

#2

7 + 3

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3
      • 2.Sb2#
      • 2.Sc5#
      • 2.Sb6#
    • 1...Rd5
      • 2.Sc5#
    • 1...Rd6
      • 2.Sb6#
    • 1...Rd7
      • 2.Sb2#
      • 2.Sc5#
      • 2.Sb6#
  • Tries
    • 1.Rb1?
      • threat
        • 2.Ra1#
      • 1...Rd5
        • 2.Sc5#
      • 1...Bd5!
    • 1.Qa5?
      • threat
        • 2.Sb2#
        • 2.Sc5#
        • 2.Sb6#
        • 2.Qb4#
      • 1...Rd5
        • 2.Sc5#
      • 1...Bd5
        • 2.Sb2#
        • 2.Sc5#
      • 1...Ra8
        • 2.Qb4#
      • 1...Bc6
        • 2.Qb4#
      • 1...Rd4!
    • 1.c4+?
      • 1...Ka2
        • 2.Sc3#
      • 1...Rxd3
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Bxd3!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Ra2#
      • 1...Rd5
        • 2.Sc5#
      • 1...Bd5
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::QAR(G)+S(D)
  • Tries
    • Try
      • R(E);
      • Threat
        • R(E)
      • Vars
        • R(c);N_GUARD,S_CUTB(b)::QAR(G)+S(D)
      • Refutation
        • B(b);
    • Try
      • Q(G);
      • Threat
        • DUALS(4)
      • Vars
        • R(c);::QAR(G)+S(D)
        • R(c);::QAB1(G)
        • B(b);::QAB1(G)
      • Refutation
        • R(c);
    • Try
      • P(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(G)+S(D),DCHECK
      • Refutation
        • B(b);XR(C)
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • R(c);N_GUARD,S_CUTB(b)::QAR(G)+S(D)
      • B(b);N_GUARD,S_CUTR(c)::R(C)+P(B)
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