MESON Chess Problem Database

Problem Display
PID: 90007 (8/KN4pb/n1B1p3/P7/2kpp2Q/PpP4R/1prp4/3N4 w - - 0 1)

Paslack, Rainer

Die Schwalbe, 1998

8/KN4pb/n1B1p3/P7/2kpp2Q/PpP4R/1prp4/3N4

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Sxb2#
    • 1...Rxc3
      • 2.Sxb2#
    • 1...Sc5
      • 2.Sd6#
    • 1...e3
      • 2.Qxd4#
  • Tries
    • 1.Kb6?
      • threat
        • 2.Sd6#
      • 1...e3
        • 2.Qxd4#
      • 1...dxc3!
    • 1.Qf2?
      • threat
        • 2.Qxd4#
      • 1...Rxc3
        • 2.Sxb2#
      • 1...dxc3
        • 2.Sd6#
      • 1...d3
        • 2.Sd6#
        • 2.Qd4#
      • 1...e5
        • 2.Qf7#
      • 1...e3!
    • 1.Qxe4?
      • threat
        • 2.Qxd4#
        • 2.Qxe6#
      • 1...Rxc3
        • 2.Sxb2#
        • 2.Rxc3#
        • 2.Qxe6#
      • 1...Bf5
        • 2.Qxd4#
      • 1...Bg8
        • 2.Qd3#
        • 2.Qxd4#
      • 1...Sb4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Sd6#
        • 2.Qxd4#
      • 1...Sc7
        • 2.Qxd4#
      • 1...e5
        • 2.Qd5#
      • 1...Bxe4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qxd4#
      • 1...Rxc3
        • 2.Sxb2#
      • 1...dxc3
        • 2.Se3#
      • 1...d3
        • 2.Qd4#
      • 1...e5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::S(A),XP(a)
    • R(b);N_GUARD,XP(C)::S(A),XP(a)
    • S(h);SBLOCK::S(I)
    • P(g);OGATE,P_SPINP(f)::QAR1(E),XP(f)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • S(I)
      • Vars
        • P(g);OGATE,P_SPINP(f)::QAR1(E),XP(f)
      • Refutation
        • P(f);P_SPINP(g),XP(C)
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(f)
      • Vars
        • R(b);N_GUARD,XP(C)::S(A),XP(a)
        • P(f);XP(C)::S(I)
        • P(i);OGATEB::QAB(E)
      • Refutation
        • P(g);
    • Try
      • Q(E);P_PINP(f),XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(k);::QAR1(E),XP(f)
        • S(h);::QAR1(E),XP(f)
        • P(i);N_GUARD::QAB1(E)
      • Refutation
        • B(k);N_SPINP(f),XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XP(f)
    • Vars
      • R(b);N_GUARD,XP(C)::S(A),XP(a)
      • P(f);N_GUARD,SBLOCK,XP(C)::S(A)
      • P(f);::QAR1(E)
      • P(i);N_GUARD::QAB1(E)
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