MESON Chess Problem Database

Problem Display
PID: 161598 (bB6/6q1/R3B2p/pPk3pQ/K7/2P1P3/2R2N2/br1r4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Het Parool, 1980

bB6/6q1/R3B2p/pPk3pQ/K7/2P1P3/2R2N2/br1r4

#2

10 + 9

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3
      • 2.Ba7#
    • 1...Qd4+
      • 2.cxd4#
    • 1...Qe5
      • 2.Ba7#
    • 1...Qf6
      • 2.Ba7#
    • 1...Qf8
      • 2.Ba7#
    • 1...Qh8
      • 2.Ba7#
    • 1...Qg6
      • 2.Ba7#
    • 1...Qa7
      • 2.Bxa7#
    • 1...Qg8
      • 2.Ba7#
    • 1...Rb4+
      • 2.cxb4#
    • 1...Rc1
      • 2.Sd3#
      • 2.Bd6#
    • 1...Re1
      • 2.Sd3#
      • 2.Bd6#
    • 1...Rf1
      • 2.Sd3#
      • 2.Bd6#
    • 1...Rg1
      • 2.Sd3#
      • 2.Bd6#
    • 1...Rh1
      • 2.Sd3#
      • 2.Bd6#
    • 1...Rd3
      • 2.Sxd3#
    • 1...Rd4+
      • 2.cxd4#
    • 1...Rd6
      • 2.Bxd6#
    • 1...Be4
      • 2.Sxe4#
    • 1...Bc6
      • 2.Rxc6#
    • 1...Bb7
      • 2.Ba7#
  • Tries
    • 1.Qg4?
      • threat
        • 2.Qc4#
      • 1...Qd4+
        • 2.cxd4#
      • 1...Rb4+
        • 2.cxb4#
      • 1...Rd4+
        • 2.cxd4#
      • 1...Qxc3
        • 2.Ba7#
      • 1...Be4
        • 2.Sxe4#
      • 1...Bd5
        • 2.Bd6#
      • 1...Rd5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qc4#
      • 1...Qd4+
        • 2.cxd4#
      • 1...Rb4+
        • 2.cxb4#
      • 1...Rd4+
        • 2.cxd4#
      • 1...Qxc3
        • 2.Ba7#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Rd5
        • 2.Se4#
      • 1...Bd5
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • Q(h);N_GUARD,P_SPINQ(h),XP(C)::B(J)
    • Q(h);CHECK,OGATE::R(A)+P(C)DCHECK,XQ(h)
    • Q(h);N_GUARD,N_SPINP(f)::B(J)
    • Q(h);N_GUARD::B(J)
    • Q(h);N_GUARD::B(J),XQ(h)
    • R(b);CHECK,OGATE::R(A)+P(C)DCHECK,XR(b)
    • R(c);N_GUARD::S(B),XR(c)
    • R(c);CHECK,OGATE::R(A)+P(C)DCHECK,XR(c)
    • R(c);N_GUARD::B(J),XR(c)
    • B(i);N_GUARD::S(B),XB(i)
    • B(i);N_GUARD,P_PINP(F)::R1(H),XB(i)
    • B(i);S_CUTQ(h)::B(J)
  • Tries
    • Try
      • Q(G);N_PINP(f)
      • Threat
        • QAR1(G)
      • Vars
        • Q(h);CHECK,OGATE::R(A)+P(C)DCHECK,XQ(h)
        • R(b);CHECK,OGATE::R(A)+P(C)DCHECK,XR(b)
        • R(c);CHECK,OGATE::R(A)+P(C)DCHECK,XR(c)
        • Q(h);N_GUARD,P_SPINQ(h),XP(C)::B(J)
        • B(i);N_GUARD::S(B),XB(i)
        • B(i);S_CUTR(c)::B(J)
      • Refutation
        • R(c);
  • Actual
    • Q(G);N_PINP(f)
    • Threat
      • QAR1(G)
    • Vars
      • Q(h);CHECK,OGATE::R(A)+P(C)DCHECK,XQ(h)
      • R(b);CHECK,OGATE::R(A)+P(C)DCHECK,XR(b)
      • R(c);CHECK,OGATE::R(A)+P(C)DCHECK,XR(c)
      • Q(h);N_GUARD,P_SPINQ(h),XP(C)::B(J)
      • R(c);N_GUARD::S(B),XR(c)
      • R(c);S_CUTB(i)::S(B)
      • B(i);S_CUTR(c)::B(J)
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