MESON Chess Problem Database

Problem Display
PID: 136223 (1NbB1b2/2P1r1p1/3kN1R1/3qpQ2/2P2PK1/3P1p2/8/3R4 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

2nd HM., BCF 101. Ty., 1962-1963

1NbB1b2/2P1r1p1/3kN1R1/3qpQ2/2P2PK1/3P1p2/8/3R4

#2

11 + 8

5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Qxe5#
      • 2.dxc4#
    • 1...Qe4
      • 2.dxe4#
    • 1...Qc6
      • 2.Qxe5#
      • 2.fxe5#
    • 1...Qb7
      • 2.Qxe5#
      • 2.fxe5#
    • 1...Qa8
      • 2.Qxe5#
      • 2.fxe5#
    • 1...Qxd3
      • 2.Rxd3#
      • 2.Qxd3#
      • 2.Qxe5#
      • 2.fxe5#
    • 1...Rxe6
      • 2.Qxf8#
    • 1...exf4
      • 2.Qxd5#
    • 1...e4
      • 2.Qxd5#
  • Tries
    • 1.Bxe7+?
      • 1...Kxe7
        • 2.Qxf8#
      • 1...Bxe7!
  • Keys
    • 1.d4!
      • threat
        • 2.dxe5#
      • 1...Qxe6
        • 2.fxe5#
      • 1...Qxd4
        • 2.Qxe5#
      • 1...Rxe6
        • 2.Qxf8#
      • 1...Bxe6
        • 2.c8S#
      • 1...exd4
        • 2.Qxd5#
      • 1...exf4
        • 2.Qxd5#
      • 1...e4
        • 2.Qxd5#

Anticipated by 125522(1936)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);OGATE,P_PINP(D)::R(A)+P(B),XQ(b)
    • R(e);OGATEB,P_SPINR(e),XS(G)::QAB(F),XB(h)
    • P(c);OGATE,XP(D)::QAR1(F),XQ(b)
    • P(c);OGATE::QAR1(F),XQ(b)
  • Tries
    • Try
      • B(K);CHECK,XR(e)
      • Vars
        • K(d);S_FLIGHT,XB(K)::QAB1(F),XB(h)
      • Refutation
        • B(h);XB(K)
  • Actual
    • P(B);
    • Threat
      • P(B),XP(c)
    • Vars
      • Q(b);N_GUARD,P_PINQ(F),P_SPINQ(b),XS(G)::P(D),XP(c)
      • Q(b);N_GUARD,P_PINP(D),P_SPINQ(b),XP(B)::QAB1(F),XP(c)
      • R(e);OGATEB,P_SPINR(e),XS(G)::QAB(F),XB(h)
      • B(g);OGATE,P_PINQ(F),P_SPINB(g),XS(G)::P=S
      • P(c);OGATE,XP(B)::QAR1(F),XQ(b)
      • P(c);OGATE,XP(D)::QAR1(F),XQ(b)
      • P(c);OGATE::QAR1(F),XQ(b)
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