MESON Chess Problem Database

Problem Display
PID: 78246 (B3r3/6nQ/2n4B/8/R1b1N2p/3P1kpP/1pR4P/3NK3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

1st Prize, Sachsische Zeitung, 2001

(First published on Sat Feb 17 2001)

B3r3/6nQ/2n4B/8/R1b1N2p/3P1kpP/1pR4P/3NK3

#2

11 + 8

16210 Problemschach-Jahrbuch (2001) 2002
23 Die Schwalbe 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4+
      • 2.Qxe4#
    • 1...Be6
      • 2.Sg5#
    • 1...Se5
      • 2.Sd2#
    • 1...Se7
      • 2.Sd2#
    • 1...Sf5
      • 2.Qxf5#
    • 1...gxh2
      • 2.Rf2#
    • 1...g2
      • 2.Rf2#
  • Tries
    • 1.Be3?
      • threat
        • 2.Sg5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...gxh2
        • 2.Rf2#
      • 1...Se6
        • 2.Qh5#
      • 1...Re5!
    • 1.Re2?
      • threat
        • 2.Sd2#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...gxh2
        • 2.Rf2#
      • 1...b1S!
    • 1.Qxg7?
      • threat
        • 2.Qf6#
        • 2.Qg4#
      • 1...Re5
        • 2.Qg4#
      • 1...Re6
        • 2.Qg4#
      • 1...Rf8
        • 2.Qg4#
      • 1...Rg8
        • 2.Qf6#
      • 1...Be6
        • 2.Sg5#
      • 1...Sd4
        • 2.Qg4#
      • 1...Se5
        • 2.Sd2#
        • 2.Qf6#
      • 1...Se7
        • 2.Sd2#
        • 2.Qg4#
      • 1...Rxe4+!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qg4#
      • 1...Rxe4+
        • 2.Qxe4#
      • 1...Be6
        • 2.Sg5#
      • 1...Se5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(h);CHECK,OGATE,XS(H)::QAB1(J),XR(h)
    • B(d);N_PINS(H)::S(H)
    • S(f);N_PINS(H)::B(K)+S(H),DCHECK
    • S(g);N_GUARD::QAR2(J),XS(g)
    • P(c);N_GUARD,XP(D)::R1(C)
    • P(c);N_GUARD::R1(C)
  • Tries
    • Try
      • B(I);N_SPINS(H)
      • Threat
        • S(H)
      • Vars
        • R(h);OGATE,P_PINB(I),XS(H)::QAB1(J),XR(h)
        • P(c);N_GUARD,XP(D)::R1(C)
        • S(g);N_GUARD::QAB(J)
      • Refutation
        • R(h);
    • Try
      • R(C);N_SPINS(H)
      • Threat
        • S(H)
      • Vars
        • R(h);OGATE,P_PINR(C),XS(H)::QAB1(J),XR(h)
        • P(c);N_GUARD,XP(D)::R1(C)
      • Refutation
        • P(a);
    • Try
      • Q(J);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::QAB1(J)
        • R(h);N_PINS(H)::QAB1(J)
        • R(h);N_PINS(H)::QAR(J)
        • B(d);N_PINS(H)::S(H)
        • S(f);::QAB1(J)
      • Refutation
        • R(h);CHECK,XS(H)
  • Actual
    • Q(J);
    • Threat
      • QAB1(J)
    • Vars
      • R(h);CHECK,OGATE,XS(H)::QAB1(J),XR(h)
      • B(d);N_PINS(H)::S(H)
      • S(f);N_PINS(H)::B(K)+S(H),DCHECK
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