MESON Chess Problem Database

Problem Display
PID: 72256 (Qn3B2/b7/2q1p2K/3k4/1P1p2N1/3P2pB/2N5/6r1 w - - 0 1)

Andersson, Knut

Chess, 1953

Qn3B2/b7/2q1p2K/3k4/1P1p2N1/3P2pB/2N5/6r1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bg2#
    • 1...Rb1
      • 2.Bg2#
    • 1...Rc1
      • 2.Bg2#
    • 1...Rd1
      • 2.Bg2#
    • 1...Rg2
      • 2.Bxg2#
    • 1...Bc5
      • 2.Qa2#
    • 1...e5+
      • 2.Sf6#
  • Keys
    • 1.b5!
      • threat
        • 2.Sb4#
      • 1...e5+
        • 2.Sf6#
      • 1...Rb1
        • 2.Bg2#
      • 1...Bc5
        • 2.Qa2#
      • 1...Sa6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::B(C)
    • R(a);N_GUARD::B(C),XR(a)
    • B(g);OGATE::QAB(G)
    • P(f);CHECK,SBLOCK::S(E)
  • Actual
    • P(D);
    • Threat
      • S(A)
    • Vars
      • P(f);CHECK,SBLOCK::S(E)
      • R(a);N_GUARD::B(C)
      • B(g);OGATE::QAB(G)
      • S(h);N_GUARD::QAB1(G),XQ(e)
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