MESON Chess Problem Database

Problem Display
PID: 15270 (8/5Kn1/3R1P2/3pP2r/1Ppk3p/6P1/1P1bBRp1/1Q4B1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

12th Place, 02. WCCT, 1980-1983

8/5Kn1/3R1P2/3pP2r/1Ppk3p/6P1/1P1bBRp1/1Q4B1

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Rxg2#
    • 1...Rxe5
      • 2.Rf4#
    • 1...Bc3
      • 2.Rf5#
    • 1...Bxb4
      • 2.Rf5#
  • Tries
    • 1.Rxd5+?
      • 1...Ke3
        • 2.Rxg2#
      • 1...Kxd5!
    • 1.Re6?
      • threat
        • 2.Rf4#
      • 1...Ke3
        • 2.Rxg2#
      • 1...Bf4
        • 2.Rxf4#
      • 1...Sxe6!
    • 1.Qd3+?
      • 1...Kxe5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...cxd3!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Rf1#
      • 1...Kxe5
        • 2.Rxd5#
      • 1...Rxe5
        • 2.Rxd2#
      • 1...Bxb4
        • 2.Re2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINP(f),S_FLIGHT::B(B)+R(E),XP(b)
    • R(g);SBLOCK,XP(H)::B(B)+R(E),DCHECK
    • B(a);N_GUARD::B(B)+R(E)
    • B(a);N_GUARD,XP(G)::B(B)+R(E)
  • Tries
    • Try
      • R(I);CHECK,XP(f)
      • Vars
        • K(d);S_FLIGHT::B(B)+R(E),XP(b)
      • Refutation
        • K(d);P-FLIGHT,XR(I)
    • Try
      • R(I);N_PINP(f)
      • Threat
        • B(B)+R(E),DCHECK
      • Vars
        • K(d);S_FLIGHT::B(B)+R(E),XP(b)
        • B(a);::B(B)+R(E),DCHECK,XB(a)
      • Refutation
        • S(h);XR(I)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(c);XQ(A)
  • Actual
    • B(D);
    • Threat
      • QAR1(A)
    • Vars
      • K(d);N_SPINP(f),S_FLIGHT::B(B)+R(E)
      • K(d);N_SPINP(f),S_FLIGHT,XP(H)::R1(I),XP(f)
      • R(g);SBLOCK,XP(H)::B(B)+R(E),DCHECK,XB(a)
      • B(a);N_GUARD,XP(G)::B(B)+R(E)
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