MESON Chess Problem Database

Problem Display
PID: 89898 (n1rk4/3p2K1/2p2P2/2P2P2/8/8/7Q/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Die Schwalbe, 1984

n1rk4/3p2K1/2p2P2/2P2P2/8/8/7Q/8

#2

5 + 5

3485 Sachova skladba 1986
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Qh8#
    • 1...Rc7
      • 2.Qh8#
    • 1...Rb8
      • 2.Qxb8#
  • Tries
    • 1.Qd6?
      • 1...Ke8
        • 2.Qe7#
        • 2.Qf8#
      • 1...Rc7
        • 2.Qf8#
      • 1...Rb8
        • 2.Qxb8#
      • 1...Sc7
        • 2.Qe7#
      • 1...Sb6!
  • Keys
    • 1.f7!
      • threat
        • 2.f8Q#
      • 1...Ke7
        • 2.Qh4#
      • 1...d5
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
      • 1...Sc7
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • K(e);P-FLIGHT::QAR(A)
    • R(d);SBLOCK::QAR(A)
    • R(d);OGATEB::QAR2(A),XR(d)
  • Tries
    • Try
      • Q(A);P_PINP(b)
      • Vars
        • R(d);SBLOCK::QAR2(A)
        • R(d);OGATEB::QAR2(A),XR(d)
        • S(c);SBLOCK::QAB1(A)
      • Refutation
        • S(c);
  • Actual
    • P(D);
    • Threat
      • P=Q
    • Vars
      • K(e);S_FLIGHT::QAB(A)
      • P(b);OGATEB::QAR2(A)
      • P(b);OGATEB::QAR2(A),XP(b)
      • S(c);SBLOCK::QAB(A)
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