MESON Chess Problem Database

Problem Display
PID: 140909 (3BR3/q4B2/3p4/R1N1pk1p/3Q4/1N1b1P1P/8/6K1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Source?, 1998

3BR3/q4B2/3p4/R1N1pk1p/3Q4/1N1b1P1P/8/6K1

#2

10 + 6

15148 Sadier Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qe4#
    • 1...Be2
      • 2.Qe4#
    • 1...Bc4
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bb5
      • 2.Qe4#
    • 1...Ba6
      • 2.Qe4#
    • 1...e4
      • 2.Qf6#
    • 1...h4
      • 2.Qg4#
    • 1...dxc5
      • 2.Rxe5#
      • 2.Qxe5#
    • 1...d5
      • 2.Rxe5#
      • 2.Qxe5#
  • Tries
    • 1.Qxd3+?
      • 1...e4
        • 2.Qxe4#
      • 1...Kf4!
    • 1.Qf4+?
      • 1...exf4
        • 2.Sd4#
      • 1...Kxf4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sg7#
      • 1...Qxd4+
        • 2.Sbxd4#
      • 1...Qxf7
        • 2.Qxd3#
      • 1...Qe7
        • 2.Qf4#
      • 1...Be4
        • 2.fxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(a);N_GUARD::QAB1(E)
    • B(a);N_GUARD::QAB1(E),XB(a)
    • P(b);OGATE::QAR1(E)
    • P(d);N_GUARD::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK,P_SPINS(G),XB(a)
      • Vars
        • P(b);P_SPINP(b)::QAB1(E),XP(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);CHECK,P_SPINS(G)
      • Vars
        • P(b);SBLOCK,XQ(E)::S(B)
      • Refutation
        • K(c);P-FLIGHT,XQ(E)
  • Actual
    • S(G);P_PINP(b),P_SPINQ(E)
    • Threat
      • S(G)
    • Vars
      • Q(f);CHECK,XQ(E)::S(B),XQ(f)
      • Q(f);N_PINQ(E),XB(H)::QAB(E),XB(a)
      • Q(f);N_PINQ(E)::QAR1(E)
      • B(a);OGATE::P(C),XB(a)
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