MESON Chess Problem Database

Problem Display
PID: 234226 (K7/4n3/pRp5/3Np3/NPk2p2/q1P3n1/3Q4/3B3b w - - 0 1)

Ahues, Herbert Siegfried Oskar

Stern, 1990

K7/4n3/pRp5/3Np3/NPk2p2/q1P3n1/3Q4/3B3b

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sxb2#
    • 1...Qxb4
      • 2.Rxb4#
    • 1...f3
      • 2.Se3#
    • 1...e4
      • 2.Qd4#
  • Tries
    • 1.Be2+?
      • 1...Kb3
        • 2.Sc5#
      • 1...Sxe2!
    • 1.Rxc6+?
      • 1...Kb5
        • 2.Rc5#
      • 1...Sxc6!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Rc5#
      • 1...Kxb5
        • 2.Qd3#
      • 1...Qxb4
        • 2.Rxb4#
      • 1...axb5
        • 2.Sb6#
      • 1...cxb5
        • 2.Sb6#
      • 1...Se4
        • 2.Qe2#
      • 1...c5
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_GUARD::S(D),XQ(b)
    • Q(b);OGATE,XP(E)::R1(G),XQ(b)
    • P(e);N_GUARD::S(F)
    • P(f);N_GUARD::QAR1(B)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(d);S_FLIGHT::S(D)
      • Refutation
        • S(c);XB(A)
    • Try
      • R(G);CHECK,XP(h)
      • Vars
        • K(d);S_FLIGHT::R1(G)
      • Refutation
        • S(i);XR(G)
  • Actual
    • R(G);
    • Threat
      • R1(G)
    • Vars
      • K(d);S_FLIGHT,XR(G)::QAB(B)
      • Q(b);OGATE,XP(E)::R1(G),XQ(b)
      • P(g);P_PINS(D),SBLOCK,XR(G)::S(F)
      • P(h);P_PINS(F),SBLOCK,XR(G)::S(D)
      • S(c);N_GUARD::QAB(B)
      • P(h);P_PINS(F)::R1(G),XP(h)
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