MESON Chess Problem Database

Problem Display
PID: 157238 (5n2/B3N3/nrP4K/1p2p2B/4k3/3pPRP1/5b2/2Q5 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 1955

5n2/B3N3/nrP4K/1p2p2B/4k3/3pPRP1/5b2/2Q5

#2

9 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc6+
      • 2.Qxc6#
    • 1...Bxe3+
      • 2.Qxe3#
    • 1...d2
      • 2.Qb1#
      • 2.Qc2#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Rxf2?
      • threat
        • 2.Bf3#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...d2!
    • 1.Qc5?
      • threat
        • 2.Qd5#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...Bxe3+
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sc7
        • 2.Qb4#
      • 1...Sxc5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh4#
      • 1...Rxc6+
        • 2.Rf6#
      • 1...Bxe3+
        • 2.Rf4#
      • 1...Bxg3
        • 2.Rxg3#
      • 1...d2
        • 2.Qb1#
      • 1...Se6
        • 2.Bg6#
      • 1...Sg6
        • 2.Bxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(g);CHECK,OGATE,XP(F)::QAB(A),XR(g)
    • B(a);CHECK,OGATE,XP(B)::QAR1(A),XB(a)
    • P(d);N_GUARD::QAR2(A)
  • Tries
    • Try
      • R(C);XB(a)
      • Threat
        • B(E)
      • Vars
        • R(g);CHECK,OGATE,XP(F)::QAB(A),XR(g)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(g);CHECK,OGATE,XP(F)::QAB(A),XR(g)
        • S(f);N_GUARD::QAR(A),XS(f)
        • S(f);N_GUARD::QAR(A)
      • Refutation
        • S(f);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • R(g);CHECK,XP(F)::QAB(A)+R(C)
      • B(a);CHECK,SBLOCK,XP(B)::QAB(A)+R(C),DCHECK
      • B(a);OGATE,XP(D)::QAB(A)+R(C),XB(a)
      • P(b);OGATEB::QAB(A)
      • S(h);N_GUARD,N_PINP(F)::B(E)
      • S(h);N_GUARD,N_PINP(F)::B(E),XS(h)
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