MESON Chess Problem Database

Problem Display
PID: 75393 (B7/2Qq4/3rpB2/1r1n4/1p2kPPN/1Np2R2/5K2/5b2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Comm., The Problemist, 2007

B7/2Qq4/3rpB2/1r1n4/1p2kPPN/1Np2R2/5K2/5b2

#2

9 + 9

56 The Problemist 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qh7#
    • 1...Qc8
      • 2.Qh7#
    • 1...Qh7
      • 2.Qxh7#
    • 1...Qd8
      • 2.Qh7#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Rbb6
      • 2.Sc5#
    • 1...Rb7
      • 2.Sc5#
    • 1...Rb8
      • 2.Sc5#
    • 1...Ra6
      • 2.Re3#
      • 2.Qe5#
    • 1...Rdb6
      • 2.Re3#
      • 2.Qe5#
    • 1...Rc6
      • 2.Qe5#
    • 1...Bg2
      • 2.Qc4#
    • 1...Bh3
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...c2
      • 2.Sd2#
  • Tries
    • 1.Kxf1?
      • threat
        • 2.Qc4#
      • 1...Qc6
        • 2.Qh7#
      • 1...Qc8
        • 2.Qh7#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Rc6
        • 2.Qe5#
      • 1...Qxc7!
    • 1.Sg6?
      • threat
        • 2.Re3#
      • 1...Rb7
        • 2.Sc5#
      • 1...Rc6
        • 2.Qe5#
      • 1...Qc6!
    • 1.Be5?
      • threat
        • 2.Re3#
      • 1...Qc6
        • 2.Qh7#
      • 1...Rb7
        • 2.Sc5#
      • 1...Rc6!
    • 1.Bg5?
      • threat
        • 2.Re3#
      • 1...Qc6
        • 2.Qh7#
      • 1...Rc6
        • 2.Qe5#
      • 1...Rb7!
    • 1.Qc5?
      • threat
        • 2.Qe3#
        • 2.Qd4#
      • 1...Rxc5
        • 2.Sxc5#
      • 1...Qc6
        • 2.Qd4#
      • 1...Qb7
        • 2.Qd4#
      • 1...Rb7
        • 2.Qd4#
      • 1...Rc6
        • 2.Qd4#
      • 1...e5
        • 2.Qe3#
      • 1...Qa7!
    • 1.Qxd7?
      • threat
        • 2.Qh7#
      • 1...Rb7
        • 2.Sc5#
      • 1...Rxd7!
  • Keys
    • 1.Sg2!
      • threat
        • 2.Re3#
      • 1...Bxg2
        • 2.Qc4#
      • 1...Qc6
        • 2.Qh7#
      • 1...Rb7
        • 2.Sc5#
      • 1...Rc6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • Q(i);N_SPINS(f),OGATE::QAB(H)
    • Q(i);OGATE::QAB(H)
    • Q(i);OGATE::QAB(H),XQ(i)
    • R(e);N_GUARD::S(B),XR(e)
    • R(e);N_GUARD::S(B)
    • R(e);N_GUARD,N_SPINS(f)::S(B)
    • R(g);N_SPINS(f),OGATE::QAR1(H)
    • B(a);N_GUARD::QAR2(H)
    • B(a);N_GUARD::QAR2(H),XB(a)
    • P(b);N_GUARD::S(B)
  • Tries
    • Try
      • K(A);P-FLIGHT,XB(a)
      • Threat
        • QAR2(H)
      • Vars
        • Q(i);N_SPINS(f),OGATE::QAB(H)
        • Q(i);OGATE::QAB(H)
        • R(e);N_GUARD::S(B),XR(e)
        • R(g);N_SPINS(f),OGATE::QAR1(H)
      • Refutation
        • Q(i);XQ(H)
    • Try
      • S(F);
      • Threat
        • R1(C)
      • Vars
        • R(e);N_GUARD,N_SPINS(f)::S(B)
        • R(g);N_SPINS(f),OGATE::QAR1(H)
      • Refutation
        • Q(i);N_SPINS(f)
    • Try
      • B(G);
      • Threat
        • R1(C)
      • Vars
        • Q(i);N_SPINS(f),OGATE::QAB(H)
        • R(e);N_GUARD,N_SPINS(f)::S(B)
      • Refutation
        • R(g);N_SPINS(f)
    • Try
      • B(G);
      • Threat
        • R1(C)
      • Vars
        • Q(i);N_SPINS(f),OGATE::QAB(H)
        • R(g);N_SPINS(f),OGATE::QAR1(H)
      • Refutation
        • R(e);N_SPINS(f)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);XQ(H)::S(B),XR(e)
        • Q(i);N_SPINS(f)::QAR1(H)
        • R(e);N_SPINS(f)::QAR1(H)
        • R(g);N_SPINS(f)::QAR1(H)
        • P(h);::QAR1(H)
      • Refutation
        • Q(i);P_PINQ(H)
    • Try
      • Q(H);XQ(i)
      • Threat
        • QAB(H)
      • Vars
        • R(e);N_GUARD,N_SPINS(f)::S(B)
      • Refutation
        • R(g);XQ(H)
  • Actual
    • S(F);
    • Threat
      • R1(C)
    • Vars
      • B(a);N_GUARD,XS(F)::QAR2(H)
      • Q(i);N_SPINS(f),OGATE::QAB(H)
      • R(e);N_GUARD,N_SPINS(f)::S(B)
      • R(g);N_SPINS(f),OGATE::QAR1(H)
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