MESON Chess Problem Database

Problem Display
PID: 240650 (B3Q3/1np5/bP1p4/Rn1kp3/4N3/3K4/8/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1983

B3Q3/1np5/bP1p4/Rn1kp3/4N3/3K4/8/8

#2

6 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Sf6#
    • 1...c6
      • 2.Qf7#
      • 2.Qg8#
  • Tries
    • 1.Bxb7+?
      • 1...c6
        • 2.Bxc6#
        • 2.Qf7#
        • 2.Qg8#
      • 1...Bxb7!
    • 1.Rxb5+?
      • 1...c5
        • 2.Sc3#
        • 2.Sf6#
      • 1...Bxb5+!
    • 1.Qc8?
      • 1...cxb6
        • 2.Sc3#
        • 2.Sf6#
        • 2.Qc4#
      • 1...c5
        • 2.Sf6#
      • 1...c6
        • 2.Qg8#
      • 1...Kc6!
  • Keys
    • 1.Qd7!
      • 1...cxb6
        • 2.Qxd6#
      • 1...c5
        • 2.Sf6#
      • 1...c6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(g);N_SPINS(a),P_SPINS(f),SBLOCK::S(B)
  • Tries
    • Try
      • B(E);CHECK,XS(f)
      • Refutation
        • B(d);XB(E)
    • Try
      • R(C);CHECK,P_PINS(f),P_SPINR(C),XS(a)
      • Refutation
        • B(d);CHECK,XR(C)
    • Try
      • Q(F);
      • Vars
        • P(g);N_SPINS(a),P_SPINS(f)::S(B)
        • P(g);SBLOCK::QAB(F)
      • Refutation
        • K(b);N_SPINS(a),P_SPINP(g),P_SPINS(f),S_FLIGHT
  • Actual
    • Q(F);P_PINP(e)
    • Vars
      • P(g);N_GUARD,XP(D)::QAR1(F),XP(e)
      • P(g);N_SPINS(a),P_SPINS(f),SBLOCK::S(B)
      • P(g);SBLOCK::QAB(F)
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