MESON Chess Problem Database

Problem Display
PID: 135924 (2n2N2/q3R3/2Qnp2k/5P1p/3Br2P/4N1K1/1b6/8 w - - 0 1)

Pabst, Alfred

Augsburger Allgemeine Zeitung, 1999

2n2N2/q3R3/2Qnp2k/5P1p/3Br2P/4N1K1/1b6/8

#2

8 + 8

14503 Problemschach-Jahrbuch (1999) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Rh7#
    • 1...Qc5
      • 2.Rh7#
    • 1...Qb6
      • 2.Rh7#
    • 1...Qb8
      • 2.Rh7#
    • 1...Qa1
      • 2.Rh7#
    • 1...Qa2
      • 2.Rh7#
    • 1...Qa3
      • 2.Rh7#
    • 1...Qa4
      • 2.Rh7#
    • 1...Qa5
      • 2.Rh7#
    • 1...Qa6
      • 2.Rh7#
    • 1...Qa8
      • 2.Rh7#
    • 1...Rf4
      • 2.Rxe6#
    • 1...Bc1
      • 2.Bg7#
    • 1...Ba3
      • 2.Bg7#
    • 1...Sxf5+
      • 2.Sxf5#
    • 1...Sb7
      • 2.Rh7#
    • 1...exf5
      • 2.Sxf5#
  • Keys
    • 1.Qc1!
      • threat
        • 2.Sg4#
      • 1...Rxe3+
        • 2.Qxe3#
      • 1...Rg4+
        • 2.Sxg4#
      • 1...Sxf5+
        • 2.Sxf5#
      • 1...Bxc1
        • 2.Bg7#
      • 1...Qa3
        • 2.Rh7#
      • 1...Rf4
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(g);N_GUARD,XB(C)::R1(G)
    • Q(g);N_GUARD::R1(G)
    • Q(g);N_GUARD,P_PINS(A)::R1(G)
    • R(b);N_GUARD::R(G),XP(e)
    • B(a);N_GUARD::B(C)
    • S(d);CHECK,P_SPINP(e),XP(E)::S(A),XS(d)
    • S(d);P_SPINP(e),S_CUTQ(g)::R1(G)
    • P(e);P_SPINS(d),XP(E)::S(A),XP(e)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+S(A),DCHECK
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XS(A)::QAB(F),XR(b)
      • R(b);CHECK::QAB(F)+S(A),DCHECK,XR(b)
      • S(d);CHECK,XP(E)::QAB(F)+S(A),DCHECK,XS(d)
      • B(a);N_GUARD,XQ(F)::B(C)
      • Q(g);N_GUARD,P_PINS(A)::R1(G)
      • R(b);N_GUARD::R(G),XP(e)
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