MESON Chess Problem Database

Problem Display
PID: 82242 (B7/2q5/1pPr3Q/1P1kPP2/R1R3n1/1N2p3/5p1b/B1K2n2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach-Echo, 1982

B7/2q5/1pPr3Q/1P1kPP2/R1R3n1/1N2p3/5p1b/B1K2n2

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Qxd6#
    • 1...Qa7
      • 2.Qxd6#
    • 1...Qb7
      • 2.Qxd6#
    • 1...Qf7
      • 2.Qxd6#
    • 1...Qg7
      • 2.Qxd6#
    • 1...Qh7
      • 2.Qxd6#
    • 1...Qc8
      • 2.Qxd6#
    • 1...Rxc6
      • 2.Qe6#
    • 1...Re6
      • 2.Qxe6#
    • 1...Rd7
      • 2.Qe6#
    • 1...Rd8
      • 2.Qe6#
    • 1...Bg1
      • 2.Qh1#
    • 1...Bg3
      • 2.Qh1#
    • 1...Bf4
      • 2.Qh1#
    • 1...Bxe5
      • 2.Qh1#
    • 1...Sxe5
      • 2.Rd4#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Rd4#
        • 2.Qf3#
        • 2.Qd4#
        • 2.Qe4#
      • 1...Qxc6
        • 2.Qf3#
        • 2.Qd4#
        • 2.Qe4#
      • 1...Rxc6
        • 2.Qf3#
        • 2.Qd4#
        • 2.Qe4#
      • 1...Sxe5
        • 2.Rd4#
        • 2.Qd4#
        • 2.Qe4#
      • 1...Sd2
        • 2.Rd4#
        • 2.Qd4#
      • 1...Sg3
        • 2.Rd4#
        • 2.Qd4#
      • 1...Sf6
        • 2.Rd4#
        • 2.Qd4#
      • 1...Bxf4!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Rd3#
      • 1...Kxe5
        • 2.Rc5#
      • 1...Qxc6
        • 2.Qxd6#
      • 1...Rxc6
        • 2.Qe6#
      • 1...Bxe5
        • 2.Qh1#
      • 1...Sxe5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(i);N_GUARD,P_PINR(E),P_SPINQ(i),XP(I)::QAR1(J),XR(h)
    • Q(i);N_GUARD::QAR1(J),XR(h)
    • R(h);N_GUARD,P_PINR(E),P_SPINR(h),XP(I)::QAB1(J)
    • R(h);N_GUARD::QAB1(J),XR(h)
    • R(h);N_GUARD::QAB1(J)
    • B(c);OGATE::QAB(J)
    • B(c);OGATE,XP(G)::QAB(J)
    • S(e);SBLOCK,XP(G)::R1(E)
  • Tries
    • Try
      • Q(J);
      • Threat
        • DUALS(4)
      • Refutation
        • B(c);XQ(J)
  • Actual
    • R(E);
    • Threat
      • R(E)
    • Vars
      • K(f);P-FLIGHT,XP(G)::B(A)+R(E),DCHECK
      • Q(i);N_GUARD,P_PINR(E),P_SPINQ(i),XP(I)::QAR1(J),XR(h)
      • R(h);N_GUARD,P_PINR(E),P_SPINR(h),XP(I)::QAB1(J)
      • B(c);OGATE,SBLOCK,XP(G)::QAB(J)
      • S(e);SBLOCK,XP(G)::R1(D)
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