MESON Chess Problem Database

Problem Display
PID: 233968 (8/5Q2/1K2BP1k/3p2q1/8/4R3/7b/2B2bnR w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Skakbladet, 0000

8/5Q2/1K2BP1k/3p2q1/8/4R3/7b/2B2bnR

#2

7 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3+
      • 2.Bxe3#
    • 1...Qxf6
      • 2.Rh3#
    • 1...Qg2
      • 2.Rh3#
    • 1...Qg3
      • 2.Rxg3#
    • 1...Qg4
      • 2.Rh3#
    • 1...Qe5
      • 2.Rh3#
      • 2.Rxe5#
    • 1...Qf5
      • 2.Rh3#
    • 1...Qh5
      • 2.Qg7#
    • 1...Qg6
      • 2.Rh3#
    • 1...Qg7
      • 2.Rh3#
    • 1...Qg8
      • 2.Rh3#
  • Tries
    • 1.Qg6+?
      • 1...Qxg6
        • 2.Rh3#
      • 1...Kxg6!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Qh7#
      • 1...Qxe3+
        • 2.Bxe3#
      • 1...Qxf6+
        • 2.Re6#
      • 1...Qxf5
        • 2.Rh3#
      • 1...Qf4
        • 2.Qg6#
      • 1...Qh4
        • 2.Qg6#
      • 1...Qg2
        • 2.Rh3#
      • 1...Qg3
        • 2.Rxg3#
      • 1...Qg4
        • 2.Rh3#
      • 1...Qh5
        • 2.Qg7#
      • 1...Qg6
        • 2.Rh3#
        • 2.Qxg6#
      • 1...Qg7
        • 2.Rh3#
      • 1...Qg8
        • 2.Rh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(e);CHECK,OGATE,P_SPINQ(e),XR(C)::B(A),XQ(e)
    • Q(e);P_PINB(E),XP(F)::B(A)+R(C),DCHECK
    • Q(e);::B(A)+R(C),DCHECK
    • Q(e);OGATEB::B(A)+R(C),XQ(e)
    • Q(e);N_GUARD,N_SPINB(c),SBLOCK::QAB1(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • Q(e);SBLOCK,XQ(G)::B(A)+R(C),DCHECK
      • Refutation
        • K(f);N_SPINB(c),P-FLIGHT,XQ(G)
  • Actual
    • B(E);
    • Threat
      • QAR1(G)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINQ(e),XR(C)::B(A),XQ(e)
      • Q(e);CHECK,OGATEB,XP(F)::B(A)+R(C)
      • Q(e);XB(E)::B(A)+R(C),DCHECK
      • Q(e);N_GUARD::QAR1(G)
      • Q(e);N_GUARD,N_SPINB(c)::QAR1(G)
      • Q(e);::B(A)+R(C),DCHECK
      • Q(e);OGATEB::B(A)+R(C),XQ(e)
      • Q(e);N_GUARD,N_SPINB(c),SBLOCK::QAB1(G)
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Developed and maintained by Brian Stephenson.
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