MESON Chess Problem Database

Problem Display
PID: 266830 (6n1/N2k2Nb/8/5R2/7B/6QB/8/1K6 w - - 0 1)

Kassman, Halvar

Schackvarlden, 1933

6n1/N2k2Nb/8/5R2/7B/6QB/8/1K6

#2

7 + 3

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf5+
      • 2.Bxf5#
  • Tries
    • 1.Ka1?
      • threat
        • 2.Rd5#
        • 2.Rf7#
      • 1...Bxf5
        • 2.Bxf5#
      • 1...Se7
        • 2.Rd5#
      • 1...Sf6!
    • 1.Kc1?
      • threat
        • 2.Rd5#
        • 2.Rf7#
      • 1...Bxf5
        • 2.Bxf5#
      • 1...Se7
        • 2.Rd5#
      • 1...Sf6!
    • 1.Ka2?
      • threat
        • 2.Rd5#
        • 2.Rf7#
      • 1...Bxf5
        • 2.Bxf5#
      • 1...Se7
        • 2.Rd5#
      • 1...Sf6!
    • 1.Kb2?
      • threat
        • 2.Rd5#
        • 2.Rf7#
      • 1...Bxf5
        • 2.Bxf5#
      • 1...Se7
        • 2.Rd5#
      • 1...Sf6!
    • 1.Sb5?
      • threat
        • 2.Qc7#
      • 1...Kc6
        • 2.Qc7#
      • 1...Kc8
        • 2.Qc7#
      • 1...Bxf5+!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Qc7#
        • 2.Qd3#
      • 1...Bxf5+
        • 2.Qd3#
      • 1...Kxd8
        • 2.Qd6#
      • 1...Sf6
        • 2.Qc7#
      • 1...Se7
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,OGATE,P_SPINB(b),XR(E)::B(C),XB(b)
  • Tries
    • Try
      • K(A);N_SPINR(E),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(b);OGATE,P_SPINB(b),XR(E)::B(C),XB(b)
        • S(c);::B(C)+R(E),DCHECK
      • Refutation
        • S(c);
    • Try
      • K(A);N_SPINR(E),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(b);OGATE,P_SPINB(b),XR(E)::B(C),XB(b)
        • S(c);::B(C)+R(E),DCHECK
      • Refutation
        • S(c);
    • Try
      • K(A);N_SPINR(E),S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(b);OGATE,P_SPINB(b),XR(E)::B(C),XB(b)
        • S(c);::B(C)+R(E),DCHECK
      • Refutation
        • S(c);
    • Try
      • K(A);N_SPINR(E),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(b);OGATE,P_SPINB(b),XR(E)::B(C),XB(b)
        • S(c);::B(C)+R(E),DCHECK
      • Refutation
        • S(c);
    • Try
      • S(F);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • B(b);CHECK,P_SPINB(b),XR(E)
  • Actual
    • B(D);
    • Threat
      • DUALS(2)
    • Vars
      • B(b);CHECK,P_SPINB(b),XR(E)::QAR(B)
      • K(a);N_GUARD,P-FLIGHT,XB(D)::QAR2(B)
      • S(c);::QAR1(B)
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