MESON Chess Problem Database

Problem Display
PID: 10372 (8/2RpQn2/2b5/2rkp3/2p2p2/2R2P2/2NPB2K/8 w - - 0 1)

Hoffmann, Fritz

2nd HM., Alma-Ata, 1964

8/2RpQn2/2b5/2rkp3/2p2p2/2R2P2/2NPB2K/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Bxc4#
    • 1...Rb5
      • 2.Bxc4#
    • 1...Ba4
      • 2.Rxc5#
    • 1...Bb5
      • 2.Rxc5#
    • 1...Bb7
      • 2.Rxc5#
    • 1...Ba8
      • 2.Rxc5#
    • 1...e4
      • 2.fxe4#
    • 1...d6
      • 2.Qxf7#
  • Tries
    • 1.Rxd7+?
      • 1...Sd6
        • 2.Rxd6#
        • 2.Qxd6#
        • 2.Qf7#
      • 1...Bxd7!
  • Keys
    • 1.d4!
      • 1...exd4
        • 2.Sb4#
      • 1...cxd4 ep
        • 2.Rxc5#
      • 1...Sd6
        • 2.Qxe5#
      • 1...Ra5
        • 2.Bxc4#
      • 1...Rb5
        • 2.Bxc4#
      • 1...Ba4
        • 2.Rxc5#
      • 1...Bb5
        • 2.Rxc5#
      • 1...Bb7
        • 2.Rxc5#
      • 1...Ba8
        • 2.Rxc5#
      • 1...Sg5
        • 2.Qxe5#
      • 1...Sh6
        • 2.Qxe5#
      • 1...Sd8
        • 2.Qxe5#
      • 1...Sh8
        • 2.Qxe5#
      • 1...e4
        • 2.fxe4#
      • 1...d6
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::B(C),XP(a)
    • B(f);OGATE::R1(G),XR(c)
    • P(e);OGATE::P(F),XP(e)
    • P(g);SBLOCK::QAB(H),XS(h)
  • Tries
    • Try
      • R(G);CHECK,XP(g)
      • Refutation
        • B(f);XR(G)
  • Actual
    • P(B);
    • Vars
      • P(e);SBLOCK,XP(B)::S(A)
      • P(a);EP,OGATE,XP(B)::R1(E),XR(c)
      • S(h);N_GUARD::QAR1(H),XP(e)
      • R(c);N_GUARD::B(C),XP(a)
      • B(f);OGATE::R1(G),XR(c)
      • P(e);OGATE::P(F),XP(e)
      • P(g);SBLOCK::QAB(H),XS(h)
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