MESON Chess Problem Database

Problem Display
PID: 228152 (1N6/1P1Np3/1p2P1p1/pP1BK1p1/kn4R1/1Rp2P2/2P5/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Deutsche Schachzeitung, 1974

1N6/1P1Np3/1p2P1p1/pP1BK1p1/kn4R1/1Rp2P2/2P5/8

#2

11 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb5
      • 2.Bc6#
  • Tries
    • 1.Ke4?
      • 1...Sxc2
        • 2.Sxb6#
      • 1...Sxd5
        • 2.Kxd5#
      • 1...Sa2
        • 2.Sxb6#
      • 1...Sd3
        • 2.Kxd3#
        • 2.Sxb6#
      • 1...Sa6
        • 2.Sxb6#
      • 1...Sc6
        • 2.Sxb6#
      • 1...Kxb5!
    • 1.Bc4?
      • threat
        • 2.Sxb6#
      • 1...Sd3+
        • 2.Bxd3#
      • 1...Sd5
        • 2.Bxd5#
      • 1...Sc6+!
    • 1.Rb1?
      • 1...Kxb5
        • 2.Bc6#
      • 1...Ka3!
    • 1.Ra3+?
      • 1...Kxb5
        • 2.Bc4#
      • 1...Kxa3!
    • 1.Rd4?
      • 1...Kxb5
        • 2.Bc6#
      • 1...g4!
    • 1.Re4?
      • 1...Kxb5
        • 2.Bc6#
      • 1...g4!
  • Keys
    • 1.Be4!
      • 1...Sd3+
        • 2.Bxd3#
      • 1...Sc6+
        • 2.Bxc6#
      • 1...Kxb5
        • 2.Bc6#
      • 1...Sxc2
        • 2.Bxc2#
      • 1...Sa2
        • 2.Sxb6#
      • 1...Sd5
        • 2.Bxd5#
      • 1...Sa6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XP(E)::B(F)
  • Tries
    • Try
      • K(G);N_PINS(c),P-FLIGHT
      • Vars
        • S(c);XP(A)::S(J),XP(f)
        • S(c);XB(F)::R(D)+K(G),XS(c)
        • S(c);::S(J),XP(f)
      • Refutation
        • K(b);P_SPINS(c),S_FLIGHT,XP(E)
    • Try
      • B(F);N_PINS(c)
      • Threat
        • S(J),XP(f)
      • Vars
        • S(c);CHECK,OGATEB::R(D)+B(F),XS(c)
        • S(c);OGATEB::R(D)+B(F),XS(c)
      • Refutation
        • S(c);CHECK
    • Try
      • R(B);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(E)::B(F)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(b);N_SPINS(c),S_FLIGHT,XP(E)::B(F)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT,XR(B)
    • Try
      • R(D);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(E)::B(F)
      • Refutation
        • P(e);
    • Try
      • R(D);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(E)::B(F)
      • Refutation
        • P(e);
  • Actual
    • B(F);N_PINS(c)
    • Vars
      • S(c);CHECK,OGATEB::R(D)+B(F),XS(c)
      • K(b);OGATEB,P_SPINS(c),S_FLIGHT,XP(E)::B(F)
      • S(c);OGATE,XP(A)::R(D)+B(F),XS(c)
      • S(c);::S(J),XP(f)
      • S(c);OGATEB::R(D)+B(F),XS(c)
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