MESON Chess Problem Database

Problem Display
PID: 7501 (3r4/2Q1p3/1PP1K3/2k1P1R1/2P1BN2/2R1P3/2N2B2/8 w - - 0 1)

Hoffmann, Fritz

stern, 1990

3r4/2Q1p3/1PP1K3/2k1P1R1/2P1BN2/2R1P3/2N2B2/8

#2

13 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sxd3#
    • 1...Rd4
      • 2.exd4#
    • 1...Rd6+
      • 2.exd6#
    • 1...Rd7
      • 2.cxd7#
    • 1...Ra8
      • 2.Sd3#
    • 1...Rb8
      • 2.Sd3#
    • 1...Rc8
      • 2.Sd3#
    • 1...Re8
      • 2.Sd3#
    • 1...Rf8
      • 2.Sd3#
    • 1...Rg8
      • 2.Sd3#
    • 1...Rh8
      • 2.Sd3#
  • Tries
    • 1.Kxe7?
      • threat
        • 2.Se6#
      • 1...Rd7+
        • 2.cxd7#
      • 1...Rd6
        • 2.exd6#
      • 1...Re8+!
    • 1.Qa7?
      • threat
        • 2.Qa5#
        • 2.b7#
      • 1...Rd6+
        • 2.exd6#
      • 1...Ra8
        • 2.Sd3#
      • 1...Rd5!
    • 1.b7?
      • threat
        • 2.Qa5#
      • 1...Rd6+
        • 2.exd6#
      • 1...Ra8
        • 2.Sd3#
      • 1...Rd5!
  • Keys
    • 1.Bd3!
      • 1...Rd6+
        • 2.exd6#
      • 1...Rxd3
        • 2.Sxd3#
      • 1...Rd4
        • 2.exd4#
      • 1...Rd5
        • 2.cxd5#
      • 1...Rd7
        • 2.cxd7#
      • 1...Ra8
        • 2.e4#
      • 1...Rb8
        • 2.e4#
      • 1...Rc8
        • 2.e4#
      • 1...Re8
        • 2.e4#
      • 1...Rf8
        • 2.e4#
      • 1...Rg8
        • 2.e4#
      • 1...Rh8
        • 2.e4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::S(G),XR(c)
    • R(c);OGATE::P(D),XR(c)
    • R(c);CHECK,OGATE::R(I)+P(H),XR(c)
    • R(c);OGATE::QAR(M)+P(K),XR(c)
    • R(c);N_GUARD::S(G)
  • Tries
    • Try
      • K(L);P-FLIGHT,XP(b)
      • Threat
        • S(G)
      • Vars
        • R(c);CHECK,OGATE::QAR(M)+P(K),XR(c)
        • R(c);OGATE::R(I)+P(H),XR(c)
      • Refutation
        • R(c);CHECK
    • Try
      • Q(M);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);CHECK,OGATE::R(I)+P(H),XR(c)
        • R(c);N_GUARD::S(G)
      • Refutation
        • R(c);
    • Try
      • P(J);
      • Threat
        • QAR2(M)
      • Vars
        • R(c);CHECK,OGATE::R(I)+P(H),XR(c)
        • R(c);N_GUARD::S(G)
      • Refutation
        • R(c);
  • Actual
    • B(F);
    • Vars
      • R(c);CHECK,OGATE::R(I)+P(H),XR(c)
      • R(c);XB(F)::S(G),XR(c)
      • R(c);OGATE::P(D),XR(c)
      • R(c);OGATE::R(C)+P(E),XR(c)
      • R(c);OGATE::QAR(M)+P(K),XR(c)
      • R(c);N_GUARD::B(B)+P(D)
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