MESON Chess Problem Database

Problem Display
PID: 238871 (3Q4/1p2N3/4pN1R/1n2kB2/q5pr/1bP1P1Kp/8/4R3 w - - 0 1)

Paslack, Rainer

idee & form, 1994

3Q4/1p2N3/4pN1R/1n2kB2/q5pr/1bP1P1Kp/8/4R3

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.exd4#
    • 1...Qf4+
      • 2.exf4#
    • 1...Sa3
      • 2.Qc7#
      • 2.Qb8#
    • 1...Sxc3
      • 2.Qc7#
      • 2.Qb8#
    • 1...Sd4
      • 2.Qc7#
      • 2.Qb8#
      • 2.exd4#
    • 1...Sa7
      • 2.Qc7#
      • 2.Qb8#
    • 1...Sc7
      • 2.Qxc7#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Sd7#
      • 1...Qf4+
        • 2.exf4#
      • 1...Sxc3
        • 2.Qc7#
      • 1...exf5
        • 2.Sg6#
      • 1...Qd4
        • 2.exd4#
      • 1...Sa3
        • 2.Qc7#
      • 1...Sd4
        • 2.Qc7#
        • 2.exd4#
      • 1...Sa7
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sd6!
    • 1.Qd5+?
      • 1...exd5
        • 2.Sd7#
      • 1...Bxd5!
    • 1.Qb8+?
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sd6!
  • Keys
    • 1.e4!
      • threat
        • 2.Sg6#
      • 1...Qxe4
        • 2.Rxe4#
      • 1...Rxh6
        • 2.Sxg4#
      • 1...exf5
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(c);OGATE::R(A)+P(C)DCHECK,XQ(c)
    • Q(c);CHECK,OGATE::R(A)+P(C)DCHECK,XQ(c)
    • S(f);N_GUARD::QAB(I),XS(f)
  • Tries
    • Try
      • Q(I);
      • Threat
        • S(F)
      • Vars
        • Q(c);CHECK,OGATE::R(A)+P(C)DCHECK,XQ(c)
        • S(f);N_GUARD,XP(B)::QAB(I)
        • P(h);SBLOCK,XB(E)::S(H)
        • Q(c);OGATE::R(A)+P(C)DCHECK,XQ(c)
        • S(f);N_GUARD::QAB(I)
        • S(f);N_GUARD::QAB(I),XS(f)
      • Refutation
        • S(f);
    • Try
      • Q(I);CHECK
      • Vars
        • P(h);XQ(I)::S(F)
      • Refutation
        • B(a);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB(I),XS(f)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • P(C);
    • Threat
      • S(H)
    • Vars
      • Q(c);OGATE,P_SPINQ(c),XP(C)::R1(A),XQ(c)
      • R(e);N_GUARD,XR(G)::S(F),XP(d)
      • P(h);XB(E)::S(F)
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