MESON Chess Problem Database

Problem Display
PID: 110558 (B1n4B/1R1pP1Q1/p1qNb3/2Pkpp2/Np1r2p1/3P4/7b/3R3K w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Banyai MT, 1969

B1n4B/1R1pP1Q1/p1qNb3/2Pkpp2/Np1r2p1/3P4/7b/3R3K

#2

11 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Rb5#
    • 1...Qb5
      • 2.Rxb5#
    • 1...Qxb7
      • 2.Bxb7#
    • 1...Qb6
      • 2.Rxb6#
    • 1...Qxd6
      • 2.Rxd7#
    • 1...Qc7
      • 2.Rxc7#
    • 1...Rxd3
      • 2.Rxd3#
    • 1...Rc4
      • 2.dxc4#
    • 1...Re4
      • 2.dxe4#
    • 1...Rf4
      • 2.Qxe5#
    • 1...Bg1
      • 2.Qxe5#
    • 1...Bf7
      • 2.Qxf7#
    • 1...Bg8
      • 2.Qxg8#
    • 1...g3
      • 2.Qxe5#
    • 1...e4
      • 2.Qxd4#
    • 1...f4
      • 2.Qxe5#
  • Keys
    • 1.e8S!
      • threat
        • 2.Sf6#
      • 1...Qxa4
        • 2.Rb5#
      • 1...Qxb7
        • 2.Bxb7#
      • 1...Qxc5
        • 2.Rb5#
      • 1...Qxd6
        • 2.Rxd7#
      • 1...Rxd3
        • 2.Rxd3#
      • 1...Qb5
        • 2.Rxb5#
      • 1...Qb6
        • 2.Rxb6#
      • 1...Qc7
        • 2.Rxc7#
      • 1...Rc4
        • 2.dxc4#
      • 1...Re4
        • 2.dxe4#
      • 1...Rf4
        • 2.Qxe5#
      • 1...Bf7
        • 2.Qxf7#
      • 1...Bg8
        • 2.Qxg8#
      • 1...e4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(i);OGATEB,XS(D)::B(J)+R(G)
    • Q(i);OGATEB::B(J)+R(G),XQ(i)
    • Q(i);OGATE,P_SPINQ(i),XR(G)::B(J),XQ(i)
    • Q(i);OGATEB,XS(F)::B(J)+R(G),XP(k)
    • R(c);OGATE,P_SPINR(c),XP(C)::R(A),XR(c)
    • R(c);OGATE::R(A)+P(C)DCHECK,XR(c)
    • R(c);S_CUTB(a)::QAR1(I),XP(f)
    • B(a);N_GUARD::QAR1(I),XP(f)
    • B(j);OGATEB::QAB(I),XB(j)
    • P(d);S_CUTB(a)::QAR1(I),XP(f)
    • P(f);OGATE::QAR1(I),XR(c)
    • P(g);S_CUTB(a)::QAR1(I),XP(f)
  • Actual
    • P(H);
    • Threat
      • S(H)
    • Vars
      • Q(i);OGATEB,XS(D)::B(J)+R(G)
      • Q(i);OGATE,P_SPINQ(i),XR(G)::B(J),XQ(i)
      • Q(i);OGATEB,XP(E)::B(J)+R(G)
      • Q(i);OGATEB,XS(F)::B(J)+R(G),XP(k)
      • R(c);OGATE,P_SPINR(c),XP(C)::R(A),XR(c)
      • Q(i);OGATEB::B(J)+R(G),XQ(i)
      • R(c);OGATE::R(A)+P(C)DCHECK,XR(c)
      • R(c);S_CUTB(a)::QAR1(I),XP(f)
      • B(j);OGATEB::QAB(I),XB(j)
      • P(f);OGATE::QAR1(I),XR(c)
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