MESON Chess Problem Database

Problem Display
PID: 274316 (1b2N3/2R5/1k2K3/1P6/8/8/3B4/1Q6 w - - 0 1)

Degener, Udo

Troll, 2023

(First published on Wed Dec 21 2022)

1b2N3/2R5/1k2K3/1P6/8/8/3B4/1Q6

#2

6 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Rb7+?
      • 1...Kc5
        • 2.Qb4#
      • 1...Kxb7!
    • 1.Qa2?
      • threat
        • 2.Qa5#
        • 2.Qa6#
      • 1...Kxb5
        • 2.Qa5#
      • 1...Bxc7!
    • 1.Qc2?
      • threat
        • 2.Qc5#
        • 2.Qc6#
      • 1...Kxb5
        • 2.Qc6#
      • 1...Bxc7!
    • 1.Qe4?
      • threat
        • 2.Qc6#
        • 2.Qb7#
      • 1...Kxb5
        • 2.Qc6#
      • 1...Bxc7!
    • 1.Qa1?
      • threat
        • 2.Qa5#
        • 2.Qa6#
      • 1...Kxb5
        • 2.Qa5#
      • 1...Bxc7!
    • 1.Qc1?
      • threat
        • 2.Qc5#
        • 2.Qc6#
      • 1...Kxb5
        • 2.Qc6#
      • 1...Bxc7!
    • 1.Qh1?
      • threat
        • 2.Qc6#
        • 2.Qb7#
      • 1...Kxb5
        • 2.Qc6#
      • 1...Bxc7!
  • Keys
    • 1.Sd6!
      • 1...Kxc7
        • 2.Ba5#
      • 1...Bxc7
        • 2.Qg1#
      • 1...Ba7
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(A)
      • Refutation
        • B(b);XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(A)
      • Refutation
        • B(b);XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(A)
      • Refutation
        • B(b);XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(A)
      • Refutation
        • B(b);XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(A)
      • Refutation
        • B(b);XR(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(A)
      • Refutation
        • B(b);XR(E)
  • Actual
    • S(F);
    • Vars
      • K(a);N_GUARD,S_FLIGHT,XR(E)::B(B)
      • B(b);SBLOCK,XR(E)::QAB(A)
      • B(b);SBLOCK::R1(E)
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