MESON Chess Problem Database

Problem Display
PID: 246005 (K1N4Q/8/k7/6r1/2P5/N4p2/8/8 w - - 0 1)

Speckmann, Werner

Shakhmatna misl, 1966

K1N4Q/8/k7/6r1/2P5/N4p2/8/8

#2

5 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qf6#
      • 2.Qh6#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb6#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rg6
        • 2.Qb5#
      • 1...Ka5!
    • 1.Qd8?
      • threat
        • 2.Qb6#
      • 1...Rb5
        • 2.cxb5#
      • 1...Rg6!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sb5#
      • 1...Ka5
        • 2.Sc2#
      • 1...Rg1
        • 2.Sb1#
      • 1...Rg2
        • 2.Sc2#
      • 1...Ra5
        • 2.Qf6#
      • 1...Rb5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • R(b);N_GUARD::QAB1(E),XR(b)
        • R(b);N_GUARD::QAB1(E)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • R(b);OGATE::P(B),XR(b)
      • Refutation
        • R(b);
  • Actual
    • Q(E);
    • Threat
      • QAR(E)+S(A)
    • Vars
      • K(c);P-FLIGHT::QAR(E)+S(A)
      • R(b);N_GUARD::QAR(E)+S(A)
      • R(b);SBLOCK::QAR(E)
      • R(b);::QAR(E)+S(A),XR(b)
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