MESON Chess Problem Database

Problem Display
PID: 162188 (1K6/R1P1k1NN/8/4b3/8/8/4Q2B/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Hamar Arbeiderbladet, 1977

1K6/R1P1k1NN/8/4b3/8/8/4Q2B/8

#2

7 + 2

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Bxe5?
      • threat
        • 2.c8Q#
        • 2.c8R#
      • 1...Kd7
        • 2.c8Q#
        • 2.c8R#
      • 1...Kf7!
    • 1.Qxe5+?
      • 1...Kd7
        • 2.Qd6#
        • 2.Qe6#
        • 2.Qe8#
        • 2.c8Q#
        • 2.c8R#
      • 1...Kf7!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qe6#
      • 1...Bxc7+
        • 2.Qxc7#
      • 1...Kd6
        • 2.c8S#
      • 1...Kd7
        • 2.Qe6#
      • 1...Bxg7
        • 2.c8Q#
        • 2.c8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);N_SPINP(D),XB(a)
      • Threat
        • P=Q
      • Vars
        • K(b);P-FLIGHT::P=Q
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK,N_SPINP(D),XB(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);N_PINB(a)
    • Threat
      • QAR1(A)
    • Vars
      • B(a);CHECK,OGATE,P_SPINB(a),XP(D)::QAR2(A),XB(a)
      • K(b);N_PINP(D),P_SPINB(a),S_FLIGHT::P=S
      • K(b);P-FLIGHT::QAB1(A)
      • B(a);N_PINP(D),XS(E)::P=Q
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