MESON Chess Problem Database

Problem Display
PID: 67172 (B1b5/8/3R1p2/1N2k1p1/3pPn2/6Q1/3B4/1K6 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

17th Place, 03. WCCT, 1984-1988

B1b5/8/3R1p2/1N2k1p1/3pPn2/6Q1/3B4/1K6

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Bc3#
    • 1...g4
      • 2.Bxf4#
      • 2.Qxf4#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Bxd4#
      • 1...dxc3
        • 2.Qxc3#
      • 1...Bb7!
    • 1.Rd5+?
      • 1...Kxe4
        • 2.Sd6#
      • 1...Ke6!
    • 1.Qc3?
      • threat
        • 2.Qxd4#
      • 1...dxc3
        • 2.Bxc3#
      • 1...Se2
        • 2.Qc5#
      • 1...Se6!
    • 1.Qe3?
      • threat
        • 2.Qxd4#
      • 1...dxe3
        • 2.Bc3#
      • 1...Se6
        • 2.Rd5#
      • 1...d3
        • 2.Bc3#
        • 2.Qd4#
      • 1...Se2!
    • 1.Qxg5+?
      • 1...Bf5
        • 2.Bxf4#
        • 2.Qxf4#
        • 2.Qxf6#
        • 2.Qxf5#
      • 1...f5
        • 2.Bxf4#
        • 2.Qxf4#
        • 2.Qf6#
        • 2.Qg7#
      • 1...fxg5!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qxd4#
      • 1...Se2
        • 2.Qxf6#
      • 1...Se6
        • 2.Qf5#
      • 1...d3
        • 2.Bc3#
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATEB::B(B)
  • Tries
    • Try
      • B(B);P_PINP(a)
      • Threat
        • B(B),XP(a)
      • Vars
        • P(a);N_SPINP(a),OGATE,XB(B)::QAB(C),XP(a)
      • Refutation
        • B(f);
    • Try
      • R(F);CHECK
      • Vars
        • K(c);N_SPINS(b),P-FLIGHT,XP(D)::S(E)
      • Refutation
        • K(c);N_SPINS(b),P-FLIGHT
    • Try
      • Q(C);N_PINS(b),P_PINP(a)
      • Threat
        • QAB1(C),XP(a)
      • Vars
        • P(a);N_SPINP(a),OGATE,XQ(C)::B(B),XP(a)
        • S(b);N_GUARD::QAR2(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);N_PINS(b)
      • Threat
        • QAB1(C),XP(a)
      • Vars
        • P(a);OGATEB,XQ(C)::B(B)
        • S(b);N_GUARD,SBLOCK::R1(F)
      • Refutation
        • S(b);
    • Try
      • Q(C);CHECK,N_PINS(b),XP(d)
      • Refutation
        • P(e);XQ(C)
  • Actual
    • Q(C);N_PINS(b)
    • Threat
      • QAB1(C),XP(a)
    • Vars
      • S(b);OGATE::QAB1(C),XP(e)
      • S(b);OGATE::QAR1(C)
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