MESON Chess Problem Database

Problem Display
PID: 99261 (1Br5/2pP3r/1n5p/KBk1NN2/2p1P3/3R4/8/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Sakkelet, 1999

1Br5/2pP3r/1n5p/KBk1NN2/2p1P3/3R4/8/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Rd5#
    • 1...Sd5
      • 2.Rxd5#
    • 1...Sxd7
      • 2.Rd5#
    • 1...Sa8
      • 2.Rd5#
    • 1...cxd3
      • 2.Sxd3#
    • 1...c6
      • 2.Bd6#
  • Tries
    • 1.Rd6?
      • threat
        • 2.Rc6#
      • 1...cxd6
        • 2.Bxd6#
      • 1...c6!
    • 1.d8S?
      • threat
        • 2.Se6#
        • 2.Sb7#
      • 1...Rxb8
        • 2.Se6#
      • 1...Re7
        • 2.Sb7#
      • 1...c6
        • 2.Se6#
        • 2.Bd6#
      • 1...Rxd8!
  • Keys
    • 1.Ba7!
      • threat
        • 2.Rd5#
      • 1...Rxd7
        • 2.Sxd7#
      • 1...cxd3
        • 2.Sxd3#
      • 1...c6
        • 2.Bxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::R1(A)
    • S(c);N_GUARD::R1(A),XS(c)
    • S(c);N_GUARD,XP(G)::R1(A)
    • P(a);XR(A)::S(E),XP(a)
    • P(e);OGATE::B(H)
  • Tries
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • P(e);OGATE,XR(A)::B(H),XP(e)
      • Refutation
        • P(e);
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XB(H)::S(G)
        • R(f);::S(G)
      • Refutation
        • R(g);XS(G)
  • Actual
    • B(H);P_PINS(c)
    • Threat
      • R1(A)
    • Vars
      • R(f);XP(G)::S(E),XR(f)
      • P(a);XR(A)::S(E),XP(a)
      • P(e);N_GUARD::B(H),XS(c)
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