MESON Chess Problem Database

Problem Display
PID: 61998 (1B5K/3B4/8/2R1P1p1/3qNk2/Q7/4R2P/4b3 w - - 0 1)

Strerath, Otto

Schach, 1951

1B5K/3B4/8/2R1P1p1/3qNk2/Q7/4R2P/4b3

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qe3#
    • 1...Qb2
      • 2.Qe3#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qxe5+
      • 2.Bxe5#
    • 1...Qd1
      • 2.Qe3#
    • 1...Qa4
      • 2.Qe3#
    • 1...Qb4
      • 2.Qe3#
    • 1...Qc4
      • 2.Qe3#
    • 1...Qd5
      • 2.Qe3#
    • 1...Qd6
      • 2.Qe3#
    • 1...Bd2
      • 2.Qg3#
    • 1...Bg3
      • 2.Qxg3#
      • 2.hxg3#
    • 1...Bb4
      • 2.Qg3#
    • 1...Ba5
      • 2.Qg3#
  • Tries
    • 1.Qh3?
      • threat
        • 2.Qg4#
        • 2.Qf5#
      • 1...Qxe5+
        • 2.Bxe5#
      • 1...Qxe4
        • 2.Qg4#
      • 1...Qg1
        • 2.Qf5#
        • 2.e6#
      • 1...g4
        • 2.Qxg4#
      • 1...Qxd7!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qf8#
      • 1...Qxe5+
        • 2.Sf6#
      • 1...Qxc4
        • 2.Qe3#
      • 1...Qxd7
        • 2.Sd6#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qb6
        • 2.Sc5#
      • 1...Qd5
        • 2.Qe3#
      • 1...Bb4
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD::QAB1(C)
    • Q(b);N_GUARD,N_PINP(F)::QAB1(C),XQ(b)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::B(H),XQ(b)
    • Q(b);N_GUARD,N_PINP(F)::QAB1(C)
    • B(a);N_GUARD::QAB1(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::B(H),XQ(b)
        • Q(b);N_PINP(F),XS(D)::QAR1(C)
        • P(d);::QAR1(C),XP(d)
      • Refutation
        • Q(b);N_PINP(F),XB(G)
  • Actual
    • R(E);
    • Threat
      • QAR(C)
    • Vars
      • Q(b);CHECK,P_SPINQ(b),XP(F)::R(E)+S(D)
      • Q(b);N_GUARD,N_PINP(F),XR(E)::QAB1(C)
      • Q(b);N_PINP(F),XB(G)::R(E)+S(D)
      • Q(b);N_PINP(F)::R(E)+S(D),XQ(b)
      • Q(b);N_PINP(F)::R(E)+S(D)
      • Q(b);N_GUARD,N_PINP(F)::QAB1(C)
      • B(a);N_GUARD::QAB1(C)
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Developed and maintained by Brian Stephenson.
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