MESON Chess Problem Database

Problem Display
PID: 204275 (2n1B3/4b2q/K1R2B2/nP1k2N1/1P1N1R2/1p2pr2/5p2/8 w - - 0 1)

Haberland, A

Arbeiter Schachzeitung, 1925

2n1B3/4b2q/K1R2B2/nP1k2N1/1P1N1R2/1p2pr2/5p2/8

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bf7#
    • 1...Qc2
      • 2.Bf7#
    • 1...Qd3
      • 2.Bf7#
    • 1...Qh1
      • 2.Bf7#
    • 1...Qh2
      • 2.Bf7#
    • 1...Qh4
      • 2.Bf7#
    • 1...Qh6
      • 2.Bf7#
    • 1...Qf7
      • 2.Bxf7#
    • 1...Qh8
      • 2.Bf7#
    • 1...Sd6
      • 2.Rc5#
  • Tries
    • 1.Rc5+?
      • 1...Kd6
        • 2.Be5#
      • 1...Bxc5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rd4#
      • 1...Rxf4
        • 2.Sxe3#
      • 1...Bxf6
        • 2.Rc5#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Qh4
        • 2.Bf7#
      • 1...Bc5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(h);N_GUARD::B(I)
    • Q(h);N_GUARD,P_PINP(D)::B(I)
    • Q(h);N_GUARD::B(I),XQ(h)
    • S(i);SBLOCK,S_CUTB(g)::R1(G)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(f);P-FLIGHT::B(H)
      • Refutation
        • B(g);XR(G)
  • Actual
    • S(B);
    • Threat
      • R1(C)
    • Vars
      • R(d);N_GUARD,XR(C)::S(B),XP(c)
      • B(g);N_GUARD,XB(H)::R1(G)
      • S(e);OGATE,XR(G)::B(I),XS(e)
      • Q(h);N_GUARD::B(I)
      • B(g);N_GUARD::R1(G),XB(g)
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